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Christmas Island Mined Land Rehabilitation Task Register - November 2002

CHRISTMAS ISLAND MINED LAND REHABILITATION TASK REGISTER

PRELIMINARY TASK REGISTER - VERSION 22 NOVEMBER 2002 This is the Preliminary Task Register. It is expected that the Operational Task Register will be developed as part of the rehabilitation contract. Purpose of Preliminary Task Register At Christmas Island over the past 30 years, concerns from various stakeholders about rehabilitation practices of phosphate mining in relation to conservation values has resulted in the undertaking of numerous studies and reviews (possibly in excess of 15 separate reports). A major report by Carew-Reid in 1987 led to the establishment of the Christmas Island Rainforest Rehabilitation Program (aka CIRRP) by the Australian National Parks and Wildlife Service in 1989 (now called Parks Australia North). The last two major CIRRP reports have been significant in an operational aspect in providing informed recommendations and methodologies for undertaking mine rehabilitation at Christmas Island. This Task Register should be viewed as an operational extension of these two reports, namely:

• “Technical Assessment of the Christmas Island Rainforest Rehabilitation Program and Review of Strategic and Economic Factors Affecting the Management of the Christmas Island Rainforest Rehabilitation Program for Parks Australia North, December 1996”. CSIRO Report No. S30/1996.

• “Christmas Island Minesite Rehabilitation Plans, September 2000”.

Centre for Mined Land Rehabilitation, The University of Queensland. The purpose of this Task Register is to produce a first pass or preliminary expansion of the methodologies described in the Christmas Island Minesite Rehabilitation Plans (CIMRP), with some modifications provided by Parks Australia North from recent rehabilitation trials and undertakings, on a site by site basis to provide a framework to systematically plan and manage rehabilitation of mined out areas on Christmas Island. A Task Register is a living document with this version intended as the first step in planning rehabilitation and will undoubtedly be significantly altered, revised and evolved in subsequent editions. Revised or Updated Task Registers are produced at each major planning or implementation juncture. It is expected that the rehabilitation contractor will be responsible for the development of a detailed Operational Task Register (or scope of works) prior to the commencement of rehabilitation. It is recommended that CIRRP or Parks Australia North and perhaps other appropriate and experienced experts be engaged to assist with the development of the Operational Task Register.

Department of Mineral and Petroleum Resources 1 DRAFT 22/11/2002

Christmas Island Mined Land Rehabilitation Task Register - November 2002 This Task Register also provides photo reference points using GPS for each task site. These photo points may be of value for monitoring purposes. Task Register Particulars This Preliminary Task Register was produced by the Environment Branch of the Department of Mineral and Petroleum Resources (Western Australian Government) for the Department of Transport and Regional Services (DOTARS). The Preliminary Task Register has been produced as the operational ‘next step’ to the above-mentioned Christmas Island Minesite Rehabilitation Plans (CIMRP) and should be used in conjunction with the CIMRP. The Task Register uses the mine field areas defined in the CIMRP as the locality for each numbered task. There are more than 100 tasks (or mine fields). It should be mentioned that mine fields vary from 2 to 200 hectares and it is expected that the Operational Task Register may combine smaller sites and subdivide larger mosaic mine fields into sub-task units. Each mine field and task is displayed on Figure 1. The field inspections were undertaken by Jeff Claussen, Parks Australia North and Charles Newland, Department of Mineral and Petroleum Resources from 29 October to 01 November 2002. Each site was visited only briefly and some sites have become relatively inaccessible due to overgrown access tracks. The successful rehabilitation contractor may need to spend considerably more time on site developing the Operational Task Register, and perhaps the first step would be to re-instate access under the direction of Parks Australia. Limitations on Task Register Planning The following issues will have significant bearing in determining the feasibility of activities for the Operational Task Register. 1. – Availability of Backfill Material Section 12.1 of the Mining Act 1978 (W.A.) (C.I.) states: “The Lessee shall retain within the Leased Land at all times during the lease at no charge to the Commonwealth, sufficient backfill material for the next two years to be used by the Commonwealth for its environmental levy purposes and by the Lessees for its rehabilitation obligations under the mine field rehabilitation plans forming part of the Environmental Management Plan and the Mining Act 1978 (W.A.)(C.I.). Backfill material shall be C Grade phosphate rock. Backfill material containing less than five percent P205 will not be regarded as suitable material unless approved in writing by the by the Commonwealth.”


Christmas Island Mined Land Rehabilitation Task Register - November 2002 This Task Register has been written assuming that S12.1 will be enforced. However as part of the enforcement process, the meaning of the term “sufficient backfill material” with need to be defined quantitatively as designated areas, tonnages or cubic metres and officially excluded from mining reserves. A backfill inventory will have to be finalised in negotiation with the mine to determine which stockpiles or portions of stockpile are available as backfill material for implementation of the Operational Task Register. There is urgency required in attending to this matter as topsoil stockpiles are being removed by current mining operations and stockpiles must be retained in convenient locations to facilitate soil replacement, preferably adjacent to target areas to minimise haulage costs. Stockpiles left at opposite ends of the island may be effectively unavailable due to prohibitive haulage costs. 2. – Insufficient Volumes of Backfill Material As highlighted in previous reports, backfill volumes will be insufficient to adequately reinstate all areas tasked for soil replacement. Irrespective, backfilling is listed as a rehabilitation activity at mine fields where soil coverage is minimal (ie. pinnacle fields) and where the return of native forest is a desirable rehabilitation outcome. However, it is expected that soil replacement will occur strategically within each prioritised mine field (forest edge protective buffers, vegetation corridors across mine fields etc) and on a priority basis according to the importance of conservation objectives of each site (Abbott’s Booby or other seabird nesting areas, important ecological communities, water resource protection etc). To this end, a Strategic Backfill Redeployment Plan should be prepared and perhaps including the above-mentioned backfill inventory and as part of the pre-planning for the Operation Task Register. It is realised that the C-grade or poorer quality stockpile material is unlikely to support full forest regrowth and as such fertiliser application programs may well be required for many years perhaps till canopy closure. Given the likely backfill shortage, it may be prudent to also assess whether backfill material containing less than 5 percent P205 can be utilise for rehabilitation purposes, even as a subsoil layer and for filling deep or unsafe voids. 3. – Current Mining Activities Current mining involves winning ore through:

1. the removal of higher grade stockpiles, and

2. reworking of previous mining disturbances, excavating phosphatic ore leaving a pinnacle boulder scree with some interstitial but minimal soil.

However, the ubiquitous distribution of potential ore resources and front end grade control practice dictates that various areas be kept open and ready for excavation at any one time, thus restricting the mine’s capacity and hence willingness to relinquish mine lease areas.


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Much of the Task Register concerns areas contained within the current mine lease and hence a number of tasks may change as a result of future mining activities. These activities will impact primarily upon the amount of backfill available for rehabilitation purposes. There may also be an additional problem as the mine is responsible for the rehabilitation of areas mined under its authority but has adopted a different and non-traditional rehabilitation approach to that of Parks Australia. If the mine’s technique of not replacing backfill material proves unsuccessful then various questions are raised, such as whether areas should then be re-rehabilitated using traditional methods (ie backfill) and who is then responsible for this undertaking. 4. – Availability of Machinery Earthworks for rehabilitation have been undertaken historically by the mine and more recently by a combination of mine and civil contractor equipment. Machinery is required to load and truck stockpiled earth and then to level and respread soil, reshape and rip ground. Parks Australia North has found that the CIP earthmoving costs are significantly higher than those charged by civil contractors. Additionally, it appears that for whatever reason, the mine did not make machinery available for rehabilitation earthworks during 2002. It may be the preferred option to either import earthmoving gear specifically for the rehabilitation contract or utilise civil contractors (perhaps in conjunction with the Asia Pacific Space Centre). It is recommended that consideration be given to providing Parks Australia North with a D9 bulldozer (either hired or purchased outright) that can be dedicated entirely for rehabilitation use as opposed to a machine that is not under their control. The huge amount of rehabilitation required could well justify Parks Australia North having their own machine. 5. - Other Developments Portions of some mine fields are under development for the Immigration Reception and Processing Centre or have been allocated for the Asia Pacific Space Centre. It is expected that any areas within these mine fields not utilised by either development will thus be available for rehabilitation. The exact extent of areas required by these developments is presently uncertain and this will effect the determination of rehabilitation requirements for the affected mine fields or for portions of mine field remaining. 6. - Climate Average rainfall is 2142 mm per year and falls mainly between November and June. Rehabilitation site activities requiring machinery are generally limited to between May?? and October??. Christmas Island GIS Christmas island has an advanced GIS developed by the Federal Government and used by various agencies for land management and planning. Most


Christmas Island Mined Land Rehabilitation Task Register - November 2002 relevant land, mining, environmental and rehabilitation features are contained on the GIS, including an aerial photograph. It may be prudent for the rehabilitation contractor to utilise the GIS for rehabilitation planning and management and liaise with Parks Australia for the recording areas rehabilitation activities on Parks Australia version of the GIS. It is assumed that DOTARS will have to authorise external use of the GIS under copyright regulations. Vegetation Types at Mined Areas Mining has generally occurred in primary rainforest areas and to a lesser extent in marginal rainforest areas.

Primary Rainforest

Marginal Rainforest

Evergreen tall closed forest restricted to deeper soils often on the plateau, with an uneven closed canopy to 40 metres and emergents to 50 metres. The canopy is permanently closed. (Jeff Claussen pers com).

Most common forest type. Semi-deciduous closed forest on shallower soils, mainly found on sloping ground ond terraces. The canopy is 15 to 30 metres tall with emergents to 35 metres and is closed during the wet seasons but opens up to varying degrees over the dry season due to presence of many deciduous canopy species (Jeff Claussen pers com).


Christmas Island Mined Land Rehabilitation Task Register - November 2002 These two forest types are the end point for rehabilitation at high conservation areas. Post Mining Landscapes Mining has been occurring for more than 100 years at Christmas Island and post mining landscapes are extremely variable in a mosaic pattern. See 1996 CSIRO Report (No. S30/1996) for detail. In summary, post mining landscape types include:

• Forest regrowth - areas that were cleared but never mined and with good natural forest regrowth, some areas over 20 years old.

• Stockpile bases – the area remaining after stockpiles have been removed. These sites will begin to regrow with regrowth depending upon depth and quality of remaining soil. Both “forest regrowth” and “stockpile bases” categories are referred to in the other reports as “in situ” soil.

• Rehabilitation areas – area rehabilitated from 30 years ago to present with large variation in rehabilitation quality. Old sites often utilised a range of exotic species. Some older rehabilitation areas were moribund but are now healthy and progressing well through recent maintenance programs conducted by Parks Australia North - removing weeds/exotic stems and fertilizer application.

• Pinnacle fern fields - areas mined but with some soil remaining and small soft pinnacles if any, sometimes with dense beds of the fern Nephrolepsis. Generally, poor regrowth.

• Deep pinnacle fields - areas mined to basement leaving hard limestone pinnacles exposed, minimal soil remaining, sometimes chalky, and very poor regrowth. Usually the pinnacles fields are from two to four metres in depth but some fields have very deep voids, > 10 metres.

• Open pits – a few mine fields have small open pit excavations. • Stockpiles - lower grade and overburden material has been stockpiled

at numerous locations, often at edges of mine fields. Stockpile regrowth is variable, sometimes with good stands of regrowth, depending of nutrient availability. Some stockpiles have been removed by the mine and many others have resource potential.

• Stands of mid-successional regrowth – occurring at the ecotone between mine field and forest, growing on stockpiled material. The upwind regrowth areas may be important in protecting the native forest from wind damage.

• Current mining areas - left as a limestone pinnacle boulder scree, two to three metres in height.

Conservation Priorities Much of Christmas Island is under National Park (91 km2 out of a total of 135 km2). Conservation Areas are listed in the Preliminary Task Register and are based upon “Attachment 1 – Current Parks Australia and Christmas Island


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Phosphates Rehabilitation Priorities” from the “Christmas Island Rainforest Rehabilitation Program (CIRRP) Report 2000 – 2002”. Where Mine Lease areas were not listed, a “Low” conservation status has been assumed (Jeff Claussen pers com). Preservation and restoration of Abbott’s Booby habitat (primary rainforest) remains a conservation priority although other issues are also listed and may have bearing on conservation priorities – such as the preservation of other endemic species or groundwater protection. Unless otherwise specified, the Task Register uses the default rehabilitation objective of returning mined areas to closed canopy native forest. Rehabilitation Activities Recommended in Task Register The following types of activities are recommended in the Task Register. Earthworks 1. Importing backfill – Either bulldozer in situ stockpiles or truck in external stockpiled material for respreading over pinnacle and shallow soil areas to a depth of one meter or greater. Only conservation priority areas will be backfilled and this could involve backfilling only portions of mine fields (to create upwind buffers of vegetation to protect the forest edge from wind damage). In some cases it may be possible to backfill the entire mine field (smaller areas, stockpiles close-by). 2. Removing stockpiles – As highlighted in previous reports, stands of advanced regrowth on some stockpiles are acting as vital protective wind breaks for the forest edge. Elsewhere, wind damaged canopies at the upwind edge of mine clearings are quite evident. The decision whether to remove stockpiles for use as backfill or to retain as a protective buffer should be made on a case by case basis, preferably on advice or direction from the National Parks Australia or CIRRP Rehabilitation Officer. Ideally, each stockpile should be analysed prior to use to determine whether material is better suited for bedding fill or topsoil. For vegetated stockpiles, it is often expedient to respread stockpile material (thus destroying established regrowth) to achieve a better overall and planned rehabilitation outcome, and over a much larger area. If regrowth is exotic or weed dominant then brush should be buried under deep soil layer. Otherwise brush should be mixed in with the respread with soil. Sufficient soil, perhaps banked up to metre, should be left to facilitate rehabilitation of the stockpile base. 3. Respread or redistribute local soil material – Some deep soil banks remain in mine fields and may be available for redistribution over minimal soil areas. 4. Reshape, contour and landscape – following soil replacement and redistribution, the surface should be reshaped to natural looking contours and ripped. 5. Blade/Track Roll – for weed infested areas, the bulldozer is used to flatten and destroy weed beds by blading the surface and track rolling. The area is


Christmas Island Mined Land Rehabilitation Task Register - November 2002 then replanted. Often thick vine infestations need to be treated this way. The area is then replanted with advanced seedlings and weeds suppressed. 6. Rip – All areas to be replanted should be ripped first, to refusal in limestone pinnacle areas. A large central single tyne may be the most effective option for hard limestone. Revegetation Revegetation is currently undertaken by planting advanced stage seedlings rather than direct seeding. Problem with seeds very short seed viability periods – may be months for some rainforest species The rational being to give revegetation species competitive advantage over weed species growing directly from soil bank seed. Also, some rainforest species have very short seed viability periods, may be months in some cases. Seedlings are planted either into:

1. Prepared soil beds (backfilled areas, ripped) or in situ soil (soil material remaining after mining, ripped).

2. Interspersed plantings into older fields to improve rehabilitation quality.

Interspersed replanting has proven successful in restoring older rehabilitation sites with barren areas or predominance of exotics and poor species composition.

Seedling planting methodology is described in great detail in the CIMRP, pages 14 to 17. Some modifications to this methodology have occurred as result of the field experience gained by Parks Australia North, described below. Parks Australia North has a nursery but may need to upgrade facilities to cope with the number of seedlings required for a large rehabilitation program. Refer CIMRP pages 12 to 16 for details on propagation and planting methodology. Modification to Planting Methodology 1. Split Planting Regime Parks Australia North have suggested that a split planting regime could be considered to decrease the high mortality and increase growth rates of the essential mid to late successional species. Year one Plant early successional species and proven mid and late

successional species. After year two Plant rest of mid and late successional species

interspersed amongst first plantings.


Christmas Island Mined Land Rehabilitation Task Register - November 2002 After two years, the first plantings should be off sufficient size to provide shade and mulch for the second plantings, thus hopefully decreasing the mortality rate of the less hardy species. Parks Australia North may trial split planting regimes in the near future and the information gained could modify successive rehabilitation programs. At this point, it is important to note that provision should be made in rehabilitation maintenance programs for the replanting of specific species, on an ‘as required’ basis. 2. Direct planting into Pinnacle Fields Direct planting into pinnacle fields is used by the mine may be a valuable option for areas where soil replacement is impractical. This technique involves planting young seedlings directly into pinnacle fields in conjunction with direct seeding. Species For Revegetation: Note: No exotic species are to be included in the species mix. This practice should be discontinued immediately. Four distinct species lists are recommended in the CIMRP on page 23. These being:

1. Plateau Deep Soil 2. Terrace Deep Soil 3. Plateau Terrace Shallow Soil 4. Pinnacles

Parks Australia North has suggested that Leea angulata and Pittosporum ferrugineum could be deleted from the species list due to poor survival rates and low importance (Jeff Claussen, facsimile 4 November 2002). Other species could also be deleted as the result of field observations at rehabilitation sites. Weed Control Programs Of the 400 on more plant spp on Christmas, nearly half are exotic and many are causing, or have the potential to cause, severe weed problems. Weed control programs are essential to achieving high standard rehabilitation. National Parks Australia has developed extensive weed control experience and should be consulted or utilised in this regard. Three types of weed control are recommended in the Task Register



1. Blade/track roll – destroy or remove weed patches using bulldozers prior to planting. This method is suitable for large areas of weed infestation.

2. Thin exotic trees with basal applications – labour intensive method using a team to spot treat exotic tree stems (herbicides, chainsaws etc) in rehabilitation areas.

3. Annual maintenance programs – lower intensity programs of vigilance and ‘as required’ maintenance hopefully on an annual basis until canopy closure is attained.

Fertilizer Application: The rehabilitation soils have been analysed as having severe nutrient deficiencies (CIMRP). Fertiliser should be applied to:

1. New rehabilitation areas.

2. Older rehabilitation areas showing poor growth and nutrient deficiency. Older sites have picked up considerably using fertiliser application.

The CIMRP recommended application rates of 500 kg per ha. National Parks Australia has changed the fertiliser application regime for the initial year (pioneer species) to 100 kg/ha/year, split up into 4 x 25 kg/ha/year. The application rate may need increasing for later years to meet the demands of the mid and late successional species. Fertiliser application is discontinued once canopy closure and nutrient recycling is has bee attained. Photo Monitoring Locations GPS points were taken using a Garmin eMap GPS set to WGS84. Most GPS readings were taken in close proximity to the photopoint. Occasional readings were 20 to 50 metres distant to obtain satellite lock. Access to Rehabilitation Areas Many minefields are relatively inaccessible due to overgrown vegetation and removal of roads. Access tracks should designed into the post-rehabilitated landscape for each mine field. Acknowledgements This Task Register would not have been completed without the valuable input, experience and assistance from Jeff Claussen, Project Officer, Parks Australia North. Many thanks to Jeff for his patience and endurance in showing me all 103 mine fields in a week and David Slip of Parks Australia North for freeing up Jeff for the week. Thanks also to DOTARS Christmas Island for providing office support and to Mark Bennett for showing me CIP’s rehabilitation areas.



PRELIMINARY TASK REGISTER

TASKS 1 to 103 FOLLOW

• EACH MINE FIELD HAS BEEN GIVEN AND TASK NUMBER.

• REFER TO FIGURE 1 FOR LOCATION OF EACH TASK AND MINE FIELD


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 1 Mine Lease: 137 Field No: 28-2 Area (ha): 18.7 Field Description: Pinnacle field. Northern half in National Park. Pinnacles: Hard, 2 to 4 metres. Rehabilitation: No previous rehabilitation. Regrowth: Large shrubs to small trees, moderately dense. Weed Infestation: High Soil: Some soil remaining. No stockpiles nearby. Conservation Status: High - Rehabilitation Priority # 12. Objective: To encourage the naive forest regeneration by removing exotic vegetation. Leave track for public access to coast. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Thin exotic trees with basal applications. Fertilizer Application: Nil. Comments/Notes: Monitor for possibility of tree fall-over due to poor root development in shallow soil (further action would then be required). The CIMRP suggests a direct seeding trial in this area to supplement natural recolonisation. Photo Lat: 10 ° 27 ‘ 3.7 ” Photo Long: 105 ° 33 ‘ 8.6 “

Photo Direction Facing: 55 ° Photo Date: 29 October 2002


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 2 Mine Lease: 137 Field No: 28-1 Area (ha): 2.6 Field Description: Old haul road at natural ground surface. Used as public access track to coast for recreational purposes. In National Park. Pinnacles: None. Rehabilitation: None. Regrowth: Extensive weed thickets (Leucaena) along roadside. Weed Infestation: High. Soil: In situ. Conservation Status: High - Rehabilitation Priority # 12. Objective: Leave road for access to coast. Remove weeds from road verge. Rehabilitation Plan: Earthworks Required: Blade/track roll to flatten weeds along road verges, then rip. Revegetation Activities: Plant seedlings along road verges. Species List: B (Terrace Deep Soil) Weed Program: Flattened by bulldozer as described above. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 27 ‘ 29.9 ” Photo Long: 105 ° 33 ‘ 34.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 3 Mine Lease: 138 Field No: 27-1 Area (ha): 5.3 Field Description: Barren pinnacle field. Pinnacles: Hard, 2 to 4 metres. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Moderate. Soil: Minimal soil. Conservation Status: High - Rehabilitation Priority # 4. Edge of Abbott’s Booby nesting area. Objective: Regrow high quality rainforest with aim to providing roosting trees. Leave road open for access. If soil resources insufficient, then respread soil in deep levee banks. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater if possible. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil) and D (Pinnacle). Weed Program: Annual maintenance programs. Fertilizer Application: 100 kg/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 27 ‘ 42.1 ” Photo Long: 105 ° 33 ‘ 46.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 4 Mine Lease: 138 Field No: 27-2 Area (ha): 18.3 Field Description: Pinnacle field. Southeast end under development as Immigration Reception and Processing Centre with final area required for development unknown. Exposed to oceanic winds from west. Pinnacles: Hard, 2 to 4 metres. Some deep voids. Rehabilitation: None. Regrowth: Poor regrowth, patchy fern layer. Weed Infestation: Low. Soil: Little soil remaining in situ. Some small soil stockpiles next to road Conservation Status: High - Rehabilitation Priority # 4. Objective: Regrow native forest on available areas (preferably southern locations and excluding IRPC requirements) with aim to provide a protection buffer for edge of nearby primary rainforest. Leave northern pinnacle area intact as habitat for Blue Tailed Skink (under concern for conservation status). Leave road for access. Rehabilitation Plan: For areas not required for IPRC purposes. Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacle). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 27 ‘ 53.9 ” Photo Long: 105 ° 33 ‘ 59.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 5 Mine Lease: 138 Field No: 27-3 Area (ha): 3.2 Field Description: Small cleared area with little regrowth. Area may be required for Immigration Reception and Processing Centre. Pinnacles: None. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low. Soil: Some surface material but may be chalky. Conservation Status: High - Rehabilitation Priority # 4. Objective: Same as Task 4 - regrow native forest on available areas (preferably southern locations and excluding IRPC requirements) with aim to provide a protection buffer for edge of nearby primary rainforest. Leave road open for access. Rehabilitation Plan: For areas not required for IPRC purposes. Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacle). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 0.8 ” Photo Long: 105 ° 34 ‘ 6.9 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 6 Mine Lease: 138 Field No: 27-5 Area (ha): 4.2 Field Description: Small pinnacle field at edge of primary rainforest. Pinnacles: Hard, 3 to 5 metres. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low. Soil: Little soil. Conservation Status: High - Rehabilitation Priority # 4. Objective: Same as Task 4 - regrow native forest on available areas (preferably southern locations and excluding IRPC requirements) with aim to provide a protection buffer for edge of nearby primary rainforest. Leave northern pinnacle area intact as habitat for Blue Tailed Skink (under concern for conservation status). Leave road for access. Rehabilitation Plan: For areas not required for IPRC purposes. Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 2.4 ” Photo Long: 105 ° 34 ‘ 15.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 7 Mine Lease: 138 Field No: 27-4 Area (ha): 3.9 Field Description: Large stockpiles on either side of road. Much of area possibly required for Immigration Reception and Processing Centre purposes. Pinnacles: None. Rehabilitation: None Regrowth: Some regrowth stockpiles. Weed Infestation: Low. Soil: Some soil but may be chalky. Conservation Status: High - Rehabilitation Priority # 4. Objective: Same as Task 4 - regrow native forest on available areas (preferably southern locations and excluding IRPC requirements) with aim to provide a protection buffer for edge of nearby primary rainforest. Leave road for access. Rehabilitation Plan: For areas not required for IRPC purposes. Earthworks Required: Respread stockpile material. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 3.9 ” Photo Long: 105 ° 34 ‘ 14.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 8 Mine Lease: 138 Field No: 27-6 Area (ha): 13.0 Field Description: Mosaic of old mined areas, stockpile bases and some shallow pinnacles. Much of area has been cleared and levelled for the Immigration Reception and Processing Centre. Pinnacles: Some small patches of hard small pinnacles, to 2 metres. Rehabilitation: None. Regrowth: Ground being cleared. Weed Infestation: Low. Soil: Large stockpiles nearby, some being used for IRPC earthworks. Conservation Status: High - Rehabilitation Priority # 4. Objective: Same as Task 4 - regrow native forest on available areas (preferably southern locations and excluding IRPC requirements) with aim to provide a protection buffer for edge of nearby primary rainforest. Leave road for access. Rehabilitation Plan: For areas not required for IRPC purposes. Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 8.8 ” Photo Long: 105 ° 34 ‘ 18.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 9 Mine Lease: 138 Field No: 27-7 Area (ha): 2.3 Field Description: Rehabilitation trial, large portion of field being cleared for Immigration Reception and Processing Centre purposes. Pinnacles: None. Rehabilitation: High standard early rehabilitation. Regrowth: None. Weed Infestation: Low. Soil: Thick soil layer. Conservation Status: High - Rehabilitation Priority # 4. Objective: On any portions of rehabilitation not required for IRPC purposes, encourage the development of native forest as a protection buffer for the edge of the nearby primary rainforest. Rehabilitation Plan: For areas not required for IRPC purposes. Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Some thinning of exotic trees with basal applications, on remaining portions of rehabilitation. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, on remaining portions of rehabilitation. Photo Lat: 10 ° 28 ‘ 21.1 ” Photo Long: 105 ° 34 ‘ 26.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 10 Mine Lease: 138 Field No: 27-8 Area (ha): 4.8 Field Description: Mixed area of pinnacles in northern section and soil with slight regrowth in southern sections. Pinnacles: Small hard, 1 to 2 metres. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low. Soil: Small amount of soil remaining in situ, large stockpiles nearby. Conservation Status: High - Rehabilitation Priority # 4. Objective: Regrow native forest as a protection buffer for the edge of the nearby primary rainforest. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 25.7 ” Photo Long: 105 ° 34 ‘ 28.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 11 Mine Lease: 138 Field No: 27-9 Area (ha): 21.2 Field Description: Mixed area with in situ soil and some pinnacle areas. Much of this field appears to be required for Immigration Reception and Processing Centre. Pinnacles: Areas of small hard pinnacles, to 2 metres. Rehabilitation: Small rehabilitation trial (limited success), no other rehabilitation. Regrowth: Being cleared for construction of IRPC. Weed Infestation: Much of surface cleared, few weed areas remaining. Soil: Some soil remaining in situ. Large soil stockpiles nearby, some material being removed for IRPC construction use. One large stockpile may have been missed in the inventory. Conservation Status: High - Rehabilitation Priority # 4. Objective: On any portions of rehabilitation not required for IRPC purposes, encourage the development of native forest as a protection buffer for the edge of the nearby primary rainforest. Rehabilitation Plan: For areas not required for IRPC purposes. Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 11.9 ” Photo Long: 105 ° 34 ‘ 23.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 12 Mine Lease: 138 Field No: 27-10 Area (ha): 9.4 Field Description: Mixed area with some ground cleared for Immigration Reception and Processing Centre and a pinnacle field at the edge of the hill with overburden material overtopping the hill. Pinnacles: Hard with some soil, to 2 metres. Rehabilitation: None. Regrowth: Poor regrowth on pinnacles, moderate regrowth on hillside stockpile. Weed Infestation: Low. Soil: Some soil in pinnacle field. Stockpiles nearby. Conservation Status: High - Rehabilitation Priority # 4. Objective: On any portions of rehabilitation not required for IRPC purposes, encourage the development of native forest as a protection buffer for the edge of the nearby primary rainforest. Rehabilitation Plan: For pinnacle field only. Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 28.3 ” Photo Long: 105 ° 34 ‘ 49.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 13 Mine Lease: 139 Field No: 25-5 Area (ha): 3.4 Field Description: Old regrowth area on overburden stockpile. Pinnacles: None. Rehabilitation: None. Regrowth: Dense exotic shrub regrowth. Weed Infestation: Low Soil: Deep soil, overburden dump. Conservation Status: High - Rehabilitation Priority # 11. Objective: Remove overburden material for use nearby and then regrow native forest as a protection buffer for the edge of the nearby primary rainforest. Rehabilitation Plan: Earthworks Required: Remove overburden material for use elsewhere. Landscape and rip base area. Overburden could be pushed into adjacent fields as backfill (27-10, 25-4). Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and C (Plateau or Terrace Shallow Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 30.3 ” Photo Long: 105 ° 34 ‘ 46.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 14 Mine Lease: 139-1 Off Lease Field No: 25-6 Area (ha): 15.9 Field Description: Entire field rehabilitated. Within National Park. Pinnacles: None observed. Rehabilitation: Moderate quality rehabilitation, now at medium sized tree stage. Regrowth: N/A. Weed Infestation: Medium. Soil: Good soil depth. Conservation Status: High - Rehabilitation Priority # 11. Objective: Encourage development of native forest by spot removal of exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: N/A Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: Nil. Photo Lat: 10 ° 28 ‘ 31.5 ” Photo Long: 105 ° 34 ‘ 55.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 15 Mine Lease: 139 Field No: 25-4 Area (ha): 11.1 Field Description: Deep pit pinnacle field with pits > 10 metres depth. Pinnacles: Hard, deep, large voids, >10 metres. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low. Soil: Some small overburden stockpiles. Conservation Status: Low - for deep pit pinnacle area. High - Rehabilitation Priority # 11 elsewhere. Objective: Create a Mine Heritage Area. Deep holes could be partially backfilled for safety reasons. Sturdy and permanent fencing with signage will be required to make the area safe. Rehabilitation Plan: Earthworks Required: Optional - Partially fill deeper pits with local overburden or imported backfill. Revegetation Activities: Nil. Species List: Nil. Weed Program: Nil. Fertilizer Application: Other: Fencing and signage– needs to be sturdy, durable and permanent. Photo Lat: 10 ° 28 ‘ 32.5 ” Photo Long: 105 ° 34 ‘ 52.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 16 Mine Lease: 139 Field No: 25-3 Area (ha): 8.5 Field Description: Deep pinnacle field with large singe pit > 10 metres deep. Pinnacles: Hard, deep with hillside benches. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low. Soil: Little soil in situ. Large stockpiles nearby. Conservation Status: Low - for deep pit pinnacle area. High - Rehabilitation Priority # 11 elsewhere. Objective: Create a Mine Heritage Area. Deep holes could be partially backfilled for safety reasons. Sturdy and permanent fencing with signage will be required to make the area safe. Rehabilitation Plan: Earthworks Required: Optional - Partially fill deeper pits with local overburden or imported backfill. Revegetation Activities: Nil. Species List: Nil. Weed Program: Nil. Fertilizer Application: Other: Fencing and signage– needs to be sturdy, durable and permanent. Photo Lat: 10 ° 28 ‘ 45.4 ” Photo Long: 105 ° 34 ‘ 47.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 17 Mine Lease: 139 Field No: 25-2 Area (ha): 24.5 Field Description: Mosaic field with numerous very large soil/overburden stockpiles, flat ground and a pinnacle area. . Pinnacles: Hard with some soil, 2 to 3 metres, in northwestern corner abutting Field 25-1. Rehabilitation: None. Regrowth: Mainly fern beds with good mid successional regrowth fringing forest edge and moderate regrowth on stockpiles. Weed Infestation: Low. Soil: Some in situ soil. Numerous large stockpiles. Conservation Status: High - Rehabilitation Priority # 11. Objective: Some stockpiles may be mined. Sufficient soil should retained to use for capping shallow soil areas to at least one metre or for use as backfill in Mine Fields 25 and 27. Rehabilitation Plan: Earthworks Required: Remove stockpiles for use elsewhere, but retaining sufficient fill to respread as soil layer to depth 1 metre and targeting the pinnacle area. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 53.9 ” Photo Long: 105 ° 34 ‘ 45.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 18 Mine Lease: 139 Field No: 25.1 Area (ha): 6.2 Field Description: Rehabilitated area. Pinnacles: Possibly small pinnacle field in southern corner adjoining Field 25-2. Rehabilitation: Acceptable rehabilitation reaching medium tree size. Regrowth: None. Weed Infestation: Moderate. Soil: Probably deep soil layer. Conservation Status: High - Rehabilitation Priority # 11. Objective: Encourage development of closed canopy rain forest by removal of woody exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Thin

exotic trees with basal

applications. Annual

maintenance program.

Fertilizer Application: Nil.

Photo Lat: 10 ° 28 ‘ 37.2 ”

Photo Long: 105 ° 34 ‘ 27.5 “

Photo Direction Facing: 165 °

Photo Date: 30 October 2002


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 19 Mine Lease: 140 Field No: 26-3 Area (ha): 46.9 Field Description: Advanced rehabilitation, possibly > 20 years old, utilising soil replacement in large levee banks, 3 to 4 metres high. Portions in National Park. Some areas not rehabilitated. Several large stockpiles or stockpile bases. Pinnacles: None. Rehabilitation: Mid-successional forest. Regrowth: Some areas of moderate regrowth. Weed Infestation: Moderate. Soil: Large soil levee banks. Soil in situ. Stockpiles. Conservation Status: High - Rehabilitation Priority # 10. Objective: For advanced rehabilitation areas, encourage development of closed canopy rain forest by removal of woody exotics. Other areas, selectively rip and plant. Some minor backfilling may be advisable. Rehabilitation Plan: Earthworks Required: Nil for rehabilitation areas. Rip poor regrowth areas. Revegetation Activities: Nil

for rehabilitation areas. Plant

seedlings at ripped and areas.

Species List: A (Plateau Deep

Soil) & B (Terrace Deep Soil).

Weed Program: Thin




Fertilizer Application: For

seedling, 100 kg/ha/year as 4

x 25 kg seasonal allotments,

broadcast.

Photo Lat: 10 ° 28 ‘ 41.9 ”

Photo Long: 105 ° 34 ‘ 24.2 “




Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 20 Mine Lease: 140 Field No: 26-2 Area (ha): 12.6 Field Description: Mixed area of old regrowth, stockpiles and stockpile bases and an old rehabilitation site. Pinnacles: None. Rehabilitation: Advanced rehabilitation, excluded from mine field. Regrowth: Mainly exotic weeds. Weed Infestation: Medium. Soil: In situ. Stockpiles. Stockpile bases. Conservation Status: High - Rehabilitation Priority # 10. Objective: Regrowth native forest at poor regrowth areas. Encourage development of closed canopy rain forest by removal of woody exotics at rehabilitation areas. Rehabilitation Plan: Earthworks Required: At poor regrowth areas, blade/track roll to flatten weeds then rip. Export any remaining topsoil stockpiles to Field 26-1. Revegetation Activities: Plant seedlings at reworked areas. Species List: A (Plateau Deep Soil) and B (Terrace Deep Soil). Weed Program: At rehabilitation areas, thin exotic trees with basal applications. Annual maintenance program for all areas. Fertilizer Application: For seedling areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 22.9 ” Photo Long: 105 ° 34 ‘ 1.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 21 Mine Lease: 140 Field No: 26-1 Area (ha): 6.2 Field Description: Pinnacle field. Pinnacles: Hard, to 2 metres. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low to medium. Soil: Some soil remaining between pinnacles. Conservation Status: High - Rehabilitation Priority # 10. Objective: Regrow native forest. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to depth 1 metre or greater. Reshape, contour and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and B (Terrace Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 19.5 ” Photo Long: 105 ° 34 ‘ 3.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 22 Mine Lease: LB4 Field No: LB4 Area (ha): 16.0 Field Description: Rehabilitation area. In National Park. Pinnacles: None. Rehabilitation: Moderately successful rehabilitation at early stage. Regrowth: Not applicable. Weed Infestation: Low. Soil: Soil in situ. Conservation Status: High - Rehabilitation Priority # 6. ???? check ?????? Objective: Encourage development of native forest by thinning out woody exotics and controlling weeds. Rework and revegetate barren area near road. Rehabilitation Plan: Earthworks Required: For lower area near road, batter back steep edge, reshape and contour rip. Revegetation Activities: Plant seedlings at reworked area near road. Species List: A (Plateau Deep Soil). Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 36.8 ” Photo Long: 105 ° 36 ‘ 3.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 23 Mine Lease: 116-4 Off Lease Field No: 23-A Area (ha): 7.7 Field Description: Older rehabilitation area. In National Park. Pinnacles: None. Rehabilitation: Good to patchy rehabilitation, early-mid stage. Regrowth: None. Weed Infestation: Medium Soil: In situ. Conservation Status: High - Rehabilitation Priority # 6. Objective: Encourage development of native forest by thinning out woody exotics and controlling weeds. Rip and plant seedlings at poor revegetation patches. Rehabilitation Plan: For poor revegetation patches. Earthworks Required: Rip patches. Revegetation Activities: Plant seedlings at reworked areas. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 49.0 ” Photo Long: 105 ° 36 ‘ 50.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 24 Mine Lease: 118 Field No: 24 Area (ha): 13.4 Field Description: Rehabilitation area in two parts, north and south of road. Partially in National Park. Pinnacles: None. Rehabilitation: North of road – poor quality. South of road –older higher quality. Regrowth: Not applicable. Weed Infestation: North of road heavy infestation. South of road low infestation. Soil: Some soil remaining. Conservation Status: High - Rehabilitation Priority # 6. Objective: Assist native forest development with weed removal and supplemental plantings at areas north of road. Encourage native forest regrowth south of road by removing woody exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: North of road - control weeds and plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: North of road – spray and remove weeds. South of road - thin exotic trees with basal applications. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 55.6 ” Photo Long: 105 ° 36 ‘ 8.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 25 Mine Lease: 116 Field No: 23-4 Area (ha): 13.6 Field Description: Series of large stockpiles. Pinnacles: None. Rehabilitation: None. Regrowth: Dense fern beds interspersed with good regrowth. Weed Infestation: Low Soil: Massive volumes. Conservation Status: High - Rehabilitation Priority # 6. Objective: Remove stockpiles and leave sufficient soil layer to regrow native forest. Pinnacle fields nearby to receive soil. Rehabilitation Plan: Earthworks Required: Remove stockpiles, leaving at least 1 metre of soil. Rip. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 5.0 ” Photo Long: 105 ° 37 ‘ 3.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 26 Mine Lease: 115 Field No: 23-11 Area (ha): 5.7 Field Description: Old mined area with no rehabilitation. Pinnacles: Maybe pinnacle field in northeast corner, not sighted. Rehabilitation: None Regrowth: Fern beds with areas of patchy regrowth. Weed Infestation: Moderate. Soil: Some soil remaining in situ. Stockpiles. Conservation Status: High - Rehabilitation Priority # 7. Objective: Regrow native forest by redistributing soil and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across pinnacles. Reshape, contour and rip poor regrowth patches. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 50.9 ” Photo Long: 105 ° 37 ‘ 2.9 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 27 Mine Lease: 116 Field No: 23-3 Area (ha): 4.6 Field Description: Young rehabilitation area from late 1990’s. Northern two thirds of field in National Park. Pinnacles: None. Rehabilitation: Early stage rehabilitation, patchy and sparse with some small trees. Regrowth: Not applicable. Weed Infestation: Low. Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 6. Objective: Regrow native forest by controlling weeds and supplemental seedling planting amongst existing rehabilitation. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Plant seedlings to supplement existing rehabilitation. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 59.9 ” Photo Long: 105 ° 37 ‘ 12.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 28 Mine Lease: 116 Field No: 23-2 Area (ha): 9.7 Field Description: Large pit with pinnacle field and large stockpiles. Pinnacles: Soft small, 1 to 2 metres Rehabilitation: None. Regrowth: Poor regrowth in middle sections, good mid successional regrowth at forest edge and on stockpiles. Weed Infestation: Low. Soil: Little soil in pit. Large stockpiles. Conservation Status: High - Rehabilitation Priority # 6. Objective: To regrow native forest by replacing soil from stockpiles over the pinnacles and pit and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across pinnacles and pit area to depth > 1 metre. Rip and plant seedlings on stockpile base area, leaving soil layer > 1 metre. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 12.7 ” Photo Long: 105 ° 37 ‘ 12.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 29 Mine Lease: 116-1 Off Lease Field No: 23-1 Area (ha): 15.9 Field Description: Large pinnacle field with deep central depression. Medium size stockpile. In National Park. Pinnacles: Soft small, to 2 metres. Rehabilitation: None Regrowth: Poor regrowth in central area, good fringing regrowth and on stockpile Weed Infestation: Low. Soil: Some soil in remaining in pinnacle field. Medium sized stockpile. Conservation Status: High - Rehabilitation Priority # 6. Objective: To regrow native forest by replacing soil from stockpiles over pinnacles and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across pinnacles and pit area to depth > 1 metre. Rip and plant seedlings on stockpile base area, leaving soil layer > 1 metre. Large topsoil stockpiles at adjacent Fields 23-4 and 23-6 could provide the backfill material. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 11.4 ” Photo Long: 105 ° 36 ‘ 41.6 “

Photo Direction Facing: 60 ° Photo Date: 3 November 2002


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 30 Mine Lease: 117 Field No: 23-6 Area (ha): 5.8 Field Description: Entire field single large stockpile. Pinnacles: None. Rehabilitation: None. Regrowth: Moderate regrowth on stockpile. Weed Infestation: Low. Soil: Massive volumes. Conservation Status: High - Rehabilitation Priority # 6. Objective: To remove the stockpile and regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape, contour and rip base area. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 6.5 ” Photo Long: 105 ° 36 ‘ 59.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 31 Mine Lease: 117 Field No: 23-5 Area (ha): 2.0 Field Description: Rehabilitation trial on ex-stockpile area. Pinnacles: Top of pinnacles exposed, 0.1 metres. Rehabilitation: Poor rehabilitation where not ripped. Regrowth: Not applicable. Weed Infestation: Low. Soil: Little soil left. High - Rehabilitation Priority #6. Objective: To regrow native forest by replacing soil from stockpiles and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across surface to depth 1 metre. Rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 20.6 ” Photo Long: 105 ° 36 ‘ 56.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 32 Mine Lease: 117-1 Off Lease Field No: 22N Area (ha): 16.7 Field Description: Rehabilitation area. Some stockpiles. In National Park. Pinnacles: None. Rehabilitation: Large shrub size rehabilitation from 1998 and 1999. Regrowth: Not applicable. Weed Infestation: Low. Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 6. Objective: Encourage development of closed canopy rain forest by removal of woody exotics. Remove stockpiles and rehabilitate base area. Rehabilitation Plan: Earthworks Required: Remove stockpiles leaving > 1 metre of soil. Reshape, contour and rip stockpile base area. Revegetation Activities: Plant seedlings on ex-stockpile area. Species List: A (Plateau Deep Soil). Weed Program: For rehabilitation areas, thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 18.9 ” Photo Long: 105 ° 36 ‘ 50.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 33 Mine Lease: 117-2 Off Lease Field No: 22S Area (ha): 31.8 Field Description: Rehabilitation area, patchy. Some stockpiles. In National Park. Pinnacles: None. Rehabilitation: Variable standard of rehabilitation, from 3 to 10 years old. Regrowth: Not applicable. Weed Infestation: Moderate. Soil: Good soil depth. Conservation Status: High - Rehabilitation Priority # 6. Objective: Encourage development of native forest. Apply rehabilitation techniques on area by area basis, ranging from flattening and replanting seedlings to the thinning of woody exotics. Stockpiles to be removed and base rehabilitated. Rehabilitation Plan: Earthworks Required: At poor rehabilitation patches, blade/track roll to flatten weeds and rip. Remove stockpiles leaving > 1 metre of soil. Reshape, contour and rip stockpile base area. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 47.9 ” Photo Long: 105 ° 36 ‘ 37.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 34 Mine Lease: 116 Field No: 23-8 Area (ha): 1.6 Field Description: Stockpile area in upper portion of field. Pinnacles: None. Rehabilitation: None. Regrowth: Fern beds. Some fringing tree regrowth. Weed Infestation: Low. Soil: Soil in upper slopes, less in lower slopes. Conservation Status: Objective: Regrow native forest by redistributing soil and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material from upper slopes to lower slopes. Import soil if on site volumes insufficient to provide > 1 metre depth. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 19.1 ” Photo Long: 105 ° 36 ‘ 34.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 35 Mine Lease: 116-3 Off Lease Field No: 23-7 Area (ha): 3.2 Field Description: Pinnacle field. In National Park. Pinnacles: Soft to moderate, 3 to 4 metres. Rehabilitation: None. Regrowth: Poor regrowth, some ferns. Good mid successional fringing vegetation at forest edge. Weed Infestation: Low. Soil: Little soil remaining. Conservation Status: High - Rehabilitation Priority # 6. Objective: Regrow native forest by importing soil and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to > 1 metre depth. Stockpiles located on nearby Fields 22N and 23-10. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 13.9 ” Photo Long: 105 ° 36 ‘ 38.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 36 Mine Lease: Field No: Area (ha): Field Description: Pinnacle field. Pinnacles: Soft, 2 to 3 metres. Rehabilitation: None. Regrowth: Poor regrowth in pinnacle field, good fringing regrowth at forest edge. Weed Infestation: Low. Soil: Some soil remaining. Conservation Status: High - Rehabilitation Priority # 6. Objective: Regrow native forest by importing soil and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to > 1 metre depth. Stockpiles located on nearby Fields 22N and 23-10. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 17.0 ” Photo Long: 105 ° 36 ‘ 34.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 37 Mine Lease: 116-2 Off Lease Field No: 23-13 Area (ha): 3.5 Field Description: Field 23-12 is natural (un-mimed) primary rain forest and is probably an area incorrectly listed as a Mine Field in the CIMRP. In National Park. Pinnacles: None. Rehabilitation: None. Regrowth: None. Weed Infestation: Few. Soil: Good. Conservation Status: High - Rehabilitation Priority # 6. Objective: Use Field 23-12 as the natural analogue site for rehabilitation monitoring. Establish monitoring plot. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Nil. Weed Program: Nil.


Photo Lat: 10 ° 29 ‘ 4.2 ”

Photo Long: 105 ° 36 ‘ 32.7 “

Photo Direction Facing:180 °

Photo Date: 3 November 2002


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 38N Mine Lease: 116 Field No: 23-12 Area (ha): 4.1 Field Description: Open cut pit with steep sides and overburden dumps Pinnacles: None. Rehabilitation: None. Regrowth: Fern beds or poor regrowth in pit. Good mid successional regrowth at forest edge. Weed Infestation: Low. Soil: Some soil remaining and overburden material. Conservation Status: High - Rehabilitation Priority # 6. Objective: Reshape pit using overburden to bowl shape and plant seedlings. Regrow native forest. Rehabilitation Plan: Earthworks Required: Respread or redistribute overburden across pit floor. Reshape, contour and landscape surface to bowl shape. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and C (Plateau or Terrace Shallow Soil).. Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 2.4 ” Photo Long: 105 ° 36 ‘ 34.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 39S Mine Lease: 116 Field No: 23-12 Area (ha): 4.1 Field Description: Pinnacle field with soil stockpiles, not marked on inventory. Southern portion of field in National Park (including stockpiles). Pinnacles: Top of pinnacle exposed, 0 metres. Rehabilitation: None. Regrowth: Poor regrowth on pinnacles, good regrowth on stockpiles. Weed Infestation: Low. Soil: Some soil in situ, good stockpiles. Conservation Status: High - Rehabilitation Priority # 6. Objective: Regrow native forest by redistributing soil and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material from stockpiles over pinnacles. Import soil if on site volumes insufficient to provide > 1 metre depth. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). And D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 4.2 ” Photo Long: 105 ° 36 ‘ 31.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 39 Mine Lease: 116-5 Off Lease Field No: 116-5 Area (ha): 9.4 Field Description: Older rehabilitation area. In National Park. Pinnacles: None. Rehabilitation: Ranging from areas with good rehabilitation to poorer patches, may be 20 years old. Exotic woody weeds a problem. Regrowth: Not applicable. Weed Infestation: Moderate. Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 6. Objective: Encourage the good areas of rehabilitation to continue developing into rain forest by removing woody weeds. Flatten, rip and replant poorer or barren areas. Rehabilitation Plan: Earthworks Required: For poorer revegetation patches, blade/track roll to flatten weeds and rip. Revegetation Activities: Plant seedlings at reworked ground. Species List: A (Plateau Deep Soil). Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 18.6 ” Photo Long: 105 ° 36 ‘ 15.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 40 Mine Lease: 116 Field No: 234-10 Area (ha): 4.2 Field Description: Entire field single large stockpile. Pinnacles: None. Rehabilitation: None. Regrowth: Substantial regrowth over stockpile. Weed Infestation: Low. Soil: Massive resource. Conservation Status: High - Rehabilitation Priority # 6. Objective: To remove the stockpile and use soil elsewhere and regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape, contour and rip base area. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep

Soil).

Weed Program: Annual


Fertilizer Application:

100 kg/ha/year as 4 x 25 kg

seasonal allotments,

broadcast.

Photo Lat: 10 ° 29 ‘ 8.6 ”

Photo Long: 105 ° 36 ‘ 37.3 “




Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 41 Mine Lease: 110-1 Off Lease Field No: 20-1 Area (ha): 1.3 Field Description: Small shallow mined area. In National Park. Pinnacles: None. Rehabilitation: None. Regrowth: Good forest edge regrowth. Weed Infestation: Low. Soil: Some chalky soil. Small stockpile. Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by respreading soil and planting. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across surface. Reshape and rip. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 36.1 ” Photo Long: 105 ° 37 ‘ 17.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 42 Mine Lease: 110 Field No: 20-2 Area (ha): 5.7 Field Description: Deep pinnacle field. Pinnacles: Large hard pinnacles, >5 metres, large voids. Rehabilitation: Eastern portion rehabilitated in 2000 with seedling planted amongst pinnacles. Regrowth: Not applicable. Weed Infestation: Low. Soil: Some soil. Conservation Status: High - Rehabilitation Priority # 1. Objective: Rehabilitate remaining western portion of field by importing soil from local stockpiles and planting seedlings with aim to regrow native forest. Encourage vegetation development with weed maintenance program on eastern portion of field. Rehabilitation Plan: Earthworks Required: For western half of field, import backfill and spread as soil layer between pinnacles as deeply as practical. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings on reworked areas. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 38.2 ” Photo Long: 105 ° 37 ‘ 29.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 43 Mine Lease: 110 Field No: 20-4 Area (ha): 13.5 Field Description: Rehabilitation using the CIMRP recommendations. Pinnacles: None. Rehabilitation: 19 months old. Regrowth: None. Weed Infestation: Low. Soil: Backfill soil layer. Conservation Status: High - Rehabilitation Priority # 1. Objective: To encourage development of native forest with fertilizer and weed maintenance programs. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 52.1 ” Photo Long: 105 ° 37 ‘ 37.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 44 Mine Lease: 110 Field No: 20-19 Area (ha): 6.9 Field Description: Old mine area with patchy regrowth. Pinnacles: None. Rehabilitation: None. Regrowth: Thick fern beds with some trees. Weed Infestation: Low Soil: Some soil in situ. Small soil stockpiles. Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by redistributing soil embankments, flattening fern beds and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across surface. Reshape, contour and rip surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 47.8 ” Photo Long: 105 ° 37 ‘ 47.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 45 Mine Lease: 110-3 Off Lease Field No: 20-13 Area (ha): 7.6 Field Description: Established rehabilitation area, possibly >20 years old. In National Park. Pinnacles: None. Rehabilitation: Good rehabilitation. Regrowth: Not applicable. Weed Infestation: Low Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 1. Objective: Encourage development of native forest by removal of exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Thin


applications.


Photo Lat: 10 ° 29 ‘ 54.6 ”

Photo Long: 105 ° 37 ‘ 41.9 “




Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 46 Mine Lease: 110-2 Off Lease Field No: 20-12 Area (ha): 3.2 Field Description: Rehabilitated in 2001 and 2002. In National Park. Pinnacles: None. Rehabilitation: At early stage. Regrowth: Not applicable. Weed Infestation: Low. Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 1. Objective: To encourage development of native forest with fertilizer and weed maintenance programs. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 2.7 ” Photo Long: 105 ° 37 ‘ 42.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 47 Mine Lease: 109 Field No: 20-16 Area (ha): 4.0 Field Description: Mined area with some shallow pinnacles. Pinnacles: Some pinnacles, shallow hard, to 1 metre. Rehabilitation: None. Regrowth: Poor regrowth, some ferns. Weed Infestation: Low. Soil: Minimal soil. Conservation Status: High - Rehabilitation Priority # 2. Objective: Regrow native forest by importing soil from adjacent stockpiles and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to > 1 metre depth. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). And D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 4.1 ” Photo Long: 105 ° 37 ‘ 44.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 48 Mine Lease: 109 Field No: 20-17 Area (ha): 8.5 Field Description: Entire field single massive stockpile. Pinnacles: None. Rehabilitation: None. Regrowth: Moderate regrowth on stockpile. Weed Infestation: High weed infestation. Problem with Centrosema spp (noxious vine) Soil: Massive volumes. Conservation Status: High - Rehabilitation Priority # 2. Objective: To remove the stockpile and regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Destroy Centrosema vine in process. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 5.2 ” Photo Long: 105 ° 37 ‘ 58.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 49 Mine Lease: 109 Field No: 20-18 Area (ha): 10.5 Field Description: Old rehabilitation in southwestern portion of field. Pinnacle field in northern section. Southwestern portion in National Park. Pinnacles: Small soft, 1 to 2 metres. Rehabilitation: Rehabilitation average quality, some exotics. Regrowth: Poor regrowth on pinnacles, fern beds. Weed Infestation: Low. Soil: Minimal soil on pinnacles. Conservation Status: High - Rehabilitation Priority # 2. Objective: Encourage development of native forest by thinning exotics from rehabilitation areas. Respread soil from adjacent stockpiles over pinnacle area and plant seedlings. Rehabilitation Plan: Earthworks Required: For pinnacle area, import backfill and spread as soil layer across pinnacles to > 1 metre. Reshape to natural looking landscape and rip. Revegetation Activities: Plant seedlings on reworked areas. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Thin exotic trees with basal applications at rehabilitation areas. Annual maintenance program for all areas. Fertilizer Application: For pinnacle area, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 5.2 ” Photo Long: 105 ° 37 ‘ 58.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 50 Mine Lease: 110 Field No: 20-14 Area (ha): 8.6 Field Description: Pinnacle field. Pinnacles: Medium to hard, 2 to 3 metres. Rehabilitation: None. Regrowth: Poor, fern fields Weed Infestation: Low. Soil: Minimal. Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by importing soil from nearby stockpiles (large stockpile on Field 20-18) and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to > 1 metre depth. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). And D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 7.9 ” Photo Long: 105 ° 37 ‘ 46.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 51 Mine Lease: 110 Field No: 20-10 Area (ha): 3.5 Field Description: Established rehabilitation area, > 20 years old. Pinnacles: None. Rehabilitation: High standard rehabilitation, medium sized trees. Nutrient recycling. Regrowth: Not applicable. Weed Infestation: Low. Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 1. Objective: Encourage development of native forest by removal of exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Thin exotic trees with basal applications. Fertilizer Application: Nil. Photo Lat: 10 ° 30 ‘ 5.2 ” Photo Long: 105 ° 37 ‘ 36.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 52 Mine Lease: 110 Field No: 20-9 Area (ha): 8.1 Field Description: Pinnacle field with stockpile. Pinnacles: Soft, 1 to 2 metres. Rehabilitation: None. Regrowth: Good regrowth on stockpiles. Good fringing regrowth at forest edge. Weed Infestation: Low. Soil: Minimal soil in pinnacles. Large stockpiles nearby. Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by importing soil from nearby stockpiles and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to > 1 metre depth. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). And D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 9.7 ” Photo Long: 105 ° 37 ‘ 34.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 53 Mine Lease: 110 Field No: 20-8 Area (ha): 0.9 Field Description: Tiny area of shrub/tree sized regrowth. Not sure why this area was listed as a field in the CIMRP. In National Park. Pinnacles: None. Rehabilitation: None. Regrowth: Mid-successional regrowth, developing well. Weed Infestation: Low. Soil: Soil layer present. Conservation Status: High - Rehabilitation Priority # 1. Objective: Encourage development of native forest by removal of exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Ni. Species List: Not applicable. Weed Program: Thin exotic trees with basal applications. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 4.4 ” Photo Long: 105 ° 37 ‘ 29.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 54 Mine Lease: 110 Field No: 20-7 Area (ha): 13.9 Field Description: Mosaic from fern beds to late successional regrowth. Few small areas of pinnacles. Northeast corner in National Park. One stockpile. Pinnacles: Soft, 1 metre. Rehabilitation: None. Regrowth: Poor regrowth at fern fields, pinnacles below surface. Good quality regrowth in stands and on edge of forest. Regrowth on stockpiles. Weed Infestation: Soil: Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by respreading available soil over poor regrowth areas, ripping and planting seedlings (avoiding stands of good regrowth). Rehabilitation Plan: Earthworks Required: Respread or redistribute stockpile material across pinnacles and barren patches. Rip entire area. Revegetation Activities: Plant seedlings on reworked areas. Species List: A (Plateau Deep Soil), C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: On reworked areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 5.0 ” Photo Long: 105 ° 37 ‘ 26.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 55 Mine Lease: 110 Field No: 20-6 Area (ha): 4.1 Field Description: Pinnacle field with stockpile. Pinnacles: Soft, 1 to 2 metres. Rehabilitation: None. Regrowth: Poor regrowth on pinnacles, thick fern beds. Good fringing regrowth at forest edge. Weed Infestation: Low. Soil: Some soil banks. Medium size stockpile. Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by importing soil from nearby stockpiles and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and spread as soil layer across pinnacles to > 1 metre depth. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 52.6 ” Photo Long: 105 ° 37 ‘ 17.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 56 Mine Lease: 110 Field No: 20-3 Area (ha): 18.5 Field Description: Series of large stockpiles with fringing regrowth. Eastern portion (with some stockpiles) within National Park. Pinnacles: None. Rehabilitation: None. Regrowth: Advanced regrowth on stockpiles. Weed Infestation: Low. Soil: Massive soil resource. Conservation Status: High - Rehabilitation Priority # 1. Objective: Remove stockpiles and regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 48.0 ” Photo Long: 105 ° 37 ‘ 24.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 57 Mine Lease: 110 Field No: 20-5 Area (ha): 14.4 Field Description: Half of field rehabilitated (northeastern area) in 2001. Pinnacles: Some remaining in southwestern area, medium to hard, 1 to 2 metres. Rehabilitation: Early stage rehabilitation, progressing well so far. Regrowth: Poor regrowth on pinnacle area, barren patches, some ferns. Weed Infestation: Low. Soil: Some soil remaining in pinnacle area. . Conservation Status: High - Rehabilitation Priority # 1. Objective: Regrow native forest by encouraging development of rehabilitation vegetation through fertiliser and weed maintenance programs, and by respreading soil from adjacent stockpiles and planting seedlings at the pinnacle area. Rehabilitation Plan: Earthworks Required: For pinnacle area, import backfill and spread as soil layer across pinnacles to > 1 metre. Reshape to natural looking landscape and rip. Revegetation Activities: Plant seedlings on reworked areas. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program for all areas. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 45.5 ” Photo Long: 105 ° 37 ‘ 28.9 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 58 Mine Lease: 111, 112, 113 Field No: 21-3 Area (ha): Field Description: Established rehabilitation, > 20 years old. Pinnacles: None. Rehabilitation: Good standard rehabilitation. Picked up after being fertilised. Regrowth: Not applicable. Weed Infestation: Heavy weed infestation. Problem with Calogonium vines strangling forest. Soil: Good soil depth. Conservation Status: High - Rehabilitation Priority # 9. Objective: Encourage development of native forest by removal of exotics. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 24.1 ” Photo Long: 105 ° 37 ‘ 53.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 59N Mine Lease: 106 Field No: 15-6 Area (ha): 56.0 Field Description: Field in two separated blocks. Variable regrowth. Stockpiles. Pinnacles: None. Rehabilitation: None. Regrowth: Variable from fern beds to good regrowth at forest edge. Weed Infestation: Low. Soil: Some soil remaining in situ. Stockpiles (not sighted). Conservation Status: Medium - Rehabilitation Priority # 19. Objective: To regrow native forest by replacing soil over fern areas and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill or redistribute local stockpile material as soil layer across fern beds to depth 1 metre. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 21.4 ” Photo Long: 105 ° 38 ‘ 26.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 59N Mine Lease: 106 Field No: 15-6 Area (ha): 56.0 Field Description: Field in two separated blocks. Mosaic with pinnacle areas, fern beds and mid-successional regrowth. Pinnacles: None. Rehabilitation: None. Regrowth: Poor regrowth on pinnacle and fern areas. Good mid-successional regrowth in patches and at forest edge. Weed Infestation: Low. Soil: Some soil remaining in situ. Stockpiles (not sighted). Conservation Status: Medium - Rehabilitation Priority # 19. Objective: To regrow native forest by replacing soil over pinnacle and fern areas and planting seedlings. Rehabilitation Plan: Earthworks Required: For pinnacle and fern bed areas, import backfill or redistribute local soil material as soil layer as deeply as practical. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil), C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 51.1 ” Photo Long: 105 ° 38 ‘ 59.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 60 Mine Lease: 106 Field No: 18-4 Area (ha): 26.9 Field Description: Pinnacles and fern field. Pinnacles: Some small pinnacles, medium hardness, to 2 metres. Rehabilitation: None. Regrowth: Poor regrowth, mainly ferns. Weed Infestation: Low. Soil: Minimal soil. Conservation Status: Medium - Rehabilitation Priority # 19. Objective: To regrow native forest by replacing soil over pinnacle and fern areas and planting seedlings. Rehabilitation Plan: Earthworks Required: For pinnacle and fern bed areas, import backfill or redistribute local soil material as soil layer as deeply as practical. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil), C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 27.4 ” Photo Long: 105 ° 38 ‘ 55.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 61 Mine Lease: 105 Field No: 15-9 Area (ha): 4.0 Field Description: Area under active mining. Pinnacles: None. Rehabilitation: None. Regrowth: Regrowth being cleared. Good fringing mid-successional regrowth at forest edge. Weed Infestation: Nil, cleared ground. Soil: Soil present but could be mined. Conservation Status: Medium - Rehabilitation Priority # 13. Objective: To regrow native forest on any areas not being utilised under current mining lease operations. Rehabilitation Plan: Earthworks Required: On poor regrowth areas, not being utilised under the current mining lease, respread any remaining soil stockpiles and rip surface. Revegetation Activities: Plant seedlings on ripped areas. Species List: A (Plateau Deep Soil) and C (Plateau or Terrace Shallow Soil).. Weed Program: Annual maintenance program. Fertilizer Application: On areas being rehabilitated, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 53.3 ” Photo Long: 105 ° 39 ‘ 5.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 64 Mine Lease: 106 Field No: 15-1 Area (ha): 37.2 Field Description: Mosaic of fern and pinnacle fields and mid-successional regrowth. Also several large stockpiles. Pinnacles: Soft to medium, 2 to 3 metres. Rehabilitation: None. ??? Regrowth: Poor fern regrowth on pinnacles, patches of good quality mid-successional regrowth. Weed Infestation: Low. Soil: Minimal soil in pinnacles, soil banks and stockpiles present. Conservation Status: Medium - Rehabilitation Priority # 19. Objective: Regrow native forest by respread soil from adjacent stockpiles over pinnacle area and planting seedlings. Thin exotics from regrowth area. Rehabilitation Plan: Earthworks Required: For pinnacle area, import backfill and spread as soil layer across pinnacles to > 1 metre. Reshape to natural looking landscape and rip. Revegetation Activities: Plant seedlings on reworked areas. Species List: A (Plateau Deep Soil), C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Thin exotic trees with basal applications at regrowth areas. Annual maintenance program for reworked areas. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 14.9 ” Photo Long: 105 ° 39 ‘ 10.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 65 Mine Lease: 102 Field No: 15-12 Area (ha): 28.0 Field Description: Mosaic with fern and pinnacle fields, bare patches and mid-successional regrowth. Some stockpiles present. Pinnacles: Medium hardness, 2 to 3 metres. Rehabilitation: None. Regrowth: Variable from poor quality bare patches, fern beds and pinnacles to good quality mid-successional regrowth at forest edges. Weed Infestation: Low. Soil: Some soil remaining in situ. Conservation Status: Low. Objective: Regrow native forest by respreading any available soil over bare patches and fern beds, ripping and planting seedlings. Regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across pinnacles. Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 56.8 ” Photo Long: 105 ° 39 ‘ 34.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Tasks: 66 & 67 Mine Lease: 103 & 104 Field No: 15-10 & 15-11 Area (ha): 1 Field Description: Two small similar adjacent regrowth areas, cleared but not mined. Sites combined for convenience. Pinnacles: None. Rehabilitation: None. Regrowth: Tall shrubby regrowth but mainly exotics. Weed Infestation: High. Soil: Soil layer remaining intact. Conservation Status: Low. Objective: Regrow native forest by flattening exotic vegetation, ripping and planting seedlings. Rehabilitation Plan: Earthworks Required: Blade/track roll to flatten exotic vegetation and rip. . Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 15.2 ” Photo Long: 105 ° 39 ‘ 34.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 68 Mine Lease: 106 Field No: 15-5 Area (ha): 27.7 Field Description: Mosaic with fern and pinnacle fields, mid-successional regrowth on edge of forest and stockpiles. Pinnacles: Few small areas of pinnacles, soft, to 1 metre. Rehabilitation: None. Regrowth: Poor regrowth in middle of field with ferns and bare patches, good fringing mid-successional forest. Weed Infestation: Low Soil: Some soil remaining. Numerous small stockpiles. Conservation Status: Medium - Rehabilitation Priority # 19. Objective: Regrow native forest by respreading stockpile material over poor regrowth areas (barren areas, fern beds and pinnacles) and rip and plant seedlings. Regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across poor regrowth and pinnacle areas. Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings on reworked ground. Species List: B (Terrace Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 25.1 ” Photo Long: 105 ° 39 ‘ 30.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 69 Mine Lease: 106 Field No: 15-2 Area (ha): 3.1 Field Description: Barren mined out pit with regrowth around edges. Pinnacles: None. Rehabilitation: None. Regrowth: Good regrowth fringing pit. Weed Infestation: Low. Soil: Minimal. Conservation Status: Medium - Rehabilitation Priority # 19. Objective: The CIMRP mentions that the site may be used as a landfill. If not then the aim should be to regrow native forest by importing soil, ripping and planting seedlings. Rehabilitation Plan: Earthworks Required: If landfill does not proceed, import backfill and spread as soil layer over bottom and sides of pit to depth > 1 to 2 metres. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil) and C (Plateau or Terrace Shallow Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 27.3 ” Photo Long: 105 ° 39 ‘ 22.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 70 Mine Lease: 106 Field No: 15-4 Area (ha): 10.6 Field Description: Variable patchy regrowth with barren patches to early mid-succession regrowth. Stockpiles along western edge. Pinnacles: None Rehabilitation: None. Regrowth: Poor regrowth with patches of good early-successional regrowth. Weed Infestation: Low. Soil: Some remaining in situ. Several moderate sized stockpiles. Conservation Status: Medium - Rehabilitation Priority # 19. Objective: Regrow native forest by respreading any surplus stockpiled soil over poor regrowth areas, rip and plant seedlings. If no stockpile soil available, then just rip and replant. Remove stockpiles and regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Respread any spare soil material across barren or poor regrowth areas. Remove stockpiles leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings on reworked areas. Species List: B (Terrace Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 26.5 ” Photo Long: 105 ° 39 ‘ 20.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 71 Mine Lease: 106 Field No: 15-3 Area (ha): 2.0 Field Description: Small open pit. Pinnacles: None. Rehabilitation: None. Regrowth: Barren. Weed Infestation: Low. Soil: Minimal. Conservation Status: Medium - Rehabilitation Priority # 19. Objective: Regrow native forest by importing soil, ripping and planting seedlings. Rehabilitation Plan: Earthworks Required: Import backfill and respread as soil layer over bottom and sides of pit to depth > 1 to 2 metres. Reshape to natural looking landscape and rip entire surface. Stockpiles located on adjacent Field 15-4. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil) and C (Plateau or Terrace Shallow Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 27.1 ” Photo Long: 105 ° 39 ‘ 19.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 72 Mine Lease: 107 Field No: 18-3 Area (ha): 2.9 Field Description: Large stockpile with regrowth areas. Maybe small pinnacle field nearby (not sighted). Pinnacles: None. Rehabilitation: None. Regrowth: Mid-stage regrowth. Weed Infestation: Low. Soil: Soil in situ and stockpiled material. Conservation Status: Medium - Rehabilitation Priority # 14. Objective: To remove the stockpile and regrow native forest on the stockpile base area. Backfill and plant seedlings on pinnacle field. Rehabilitation Plan: Earthworks Required: Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Respread or redistribute local soil material across pinnacles to > 1 metre. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 43.8 ” Photo Long: 105 ° 38 ‘ 35.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 73E Mine Lease: 106 Field No: 18-2 Area (ha): 20.7 Field Description: This is the eastern portion of Field 18-2. Large areas of established rehabilitation, > 20 years old. Stockpiles. Pinnacles: None. Rehabilitation: Good mid-successional rehabilitation, > 20 years old. Regrowth: None. Weed Infestation: Low. Soil: Soil remaining. Large stockpiles. Conservation Status: High – Medium Rehabilitation Priority # 13. Objective: Encourage development of established native forest by thinning out exotics. Rip and replant any poor regrowth areas. Remove stockpiles and regrow native forest on the stockpile base area. . Rehabilitation Plan: Earthworks Required: On poor regrowth areas, blade track roll to flatten weeds and rip. For stockpiles, remove stockpiles leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Revegetation Activities:

Plant seedlings on reworked

areas.

Species List:

A (Plateau Deep Soil).

Weed Program: Thin




Fertilizer Application:

100 kg/ha/year as 4 x 25 kg

seasonal allotments.

Photo Lat: 10 ° 30 ‘ 27.2 ”

Photo Long: 105 ° 38 ‘ 36.6 “




Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 73W Mine Lease: 108 Field No: 18-2 Area (ha): 20.7 Field Description: Western portion of Field 18-2. Mosaic of pinnacle field, regrowth areas and stockpiles. Northern portion in National Park. Pinnacles: Soft to medium, to 2 metres. Rehabilitation: None. Regrowth: Variable from dense fern beds to good mid-successional regrowth in patches and at forest edge. Weed Infestation: Low to medium. Soil: Some soil remaining, large stockpiles. Conservation Status: High - Rehabilitation Priority # 3 Objective: Regrow native forest by respreading stockpile material over poor regrowth areas (fern beds and pinnacles) and rip and plant seedlings. Regrow native forest on the stockpile base area. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across poor regrowth and pinnacle areas. Remove stockpile leaving > 1 metre of soil above natural ground level. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings on reworked ground. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 22.0 ” Photo Long: 105 ° 38 ‘ 8.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task:74 Mine Lease: 108 Off Lease Field No: 19-1 Area (ha): 15.4 Field Description: Rehabilitation over most of area, one small portion at south not rehabilitated (15%). In National Park. Stockpiles. Pinnacles: None. Rehabilitation: Rehabilitation 7 years old. Regrowth: None. Weed Infestation: Low. Soil: Soil layers present. Conservation Status: High - Rehabilitation Priority # 3. Objective: To encourage the development of native forest by maintaining the established rehabilitation areas and completing outstanding rehabilitation (backfilling, landscaping, ripping and replanting) in southern areas. Rehabilitation Plan: Earthworks Required: For un-rehabilitated areas – respread or redistribute local soil material, reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings over reworked areas. Species List: A (Plateau Deep Soil). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 54.5 ” Photo Long: 105 ° 38 ‘ 0.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 75 Mine Lease: 108 Off Lease Field No: 18-1 Area (ha): 8.0 Field Description: Established rehabilitation. In National Park. Pinnacles: None. Rehabilitation: Patchy older rehabilitation, ranging from poor to average quality. The rehabilitation technique involved meandering scraper levee banks to 3 metres hight. Regrowth: None. Weed Infestation: Moderate. Soil: Soil present. Conservation Status: High - Rehabilitation Priority # 3. Objective: Re-establish high standard rehabilitation with weed control programs and by reworking and replanting patchy areas. Rehabilitation Plan: Earthworks Required: For weed infested and poor regrowth areas, blade/track roll to flatten weeds and rip. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: For replanted areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 30 ‘ 18.2 ” Photo Long: 105 ° 37 ‘ 56.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 76 Mine Lease: 101 Field No: 17-8 Area (ha): 39.5 Field Description: Mosaic from pinnacles, barren patches, fern areas to good quality regrowth and older rehabilitation areas. Northern portion in National Park. Pinnacles: Small soft less then 1 metre. Rehabilitation: Rehabilitation areas marked on map, not sighted. Regrowth: Variable from poor quality fern areas to good mid-succession regrowth patches and fringing Weed Infestation: Low. Soil: Soil remaining in situ. Conservation Status: Medium - Rehabilitation Priority # 15 for northern areas. Remainder low. Objective: To regrow native forest by reworking poorer regrowth areas and replanting. Pinnacles should be covered with soil if possible. Rehabilitation Plan: Earthworks Required: Import backfill and respread or redistribute local soil material across pinnacles to depth 1 metre. Reshape to natural looking landscape and rip entire surface. For poor regrowth areas, rip entire surface before replanting. Revegetation Activities: Plant seedlings on reworked areas. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 31 ‘ 25.5 ” Photo Long: 105 ° 39 ‘ 33.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 77 Mine Lease: 101 Field No: 17-10 Area (ha): 92.4 Field Description: Mosaic of old mined areas, fern fields, regrowth patches, old rehabilitation and stockpiles. Pinnacles: Soft, 1 to 2 metres. Rehabilitation: Low quality patch with exotic species. Regrowth: Variable from poor fern areas and pinnacles areas of good mid-successional regrowth. Weed Infestation: Medium. Soil: Some soil remaining in situ. Stockpiles. Conservation Status: Medium - Rehabilitation Priority # 15 for northern areas. Remainder low. Objective: To regrow native forest by redistributing soil over pinnacles and areas of poor regrowth, ripping and replanting seedlings. Flatten and replant the rehabilitation area. Rehabilitate stockpile bases. Rehabilitation Plan: Earthworks Required: Respread or redistribute stockpile material across pinnacles and areas of poor regrowth. Reshape to natural looking landscape and rip entire surface. Blade track roll old rehabilitation areas and rip and replant. Rehabilitate stockpile base area, leaving 1 metre of soil and ripping. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil). and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 31 ‘ 28.7 ” Photo Long: 105 ° 39 ‘ 10.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 78 Mine Lease: 101 Field No: 17-9 Area (ha): 119.2 Field Description: Some of field to be developed as satellite launch facility. Active mining to remove material before hand-over. Mosaic of fern beds, pinnacles, fringing regrowth and stockpiles. Pinnacles: Some areas, soft to medium, to 1 metre. Rehabilitation: None. Regrowth: Variable and patchy from fern beds to mid–successional regrowth. Weed Infestation: Low. Soil: Some soil in situ and numerous stockpiles. Conservation Status: Low. Objective: For any areas not required for the satellite launch facility, regrow native forest by redistributing soil over pinnacles and poor regrowth areas, ripping and replanting seedlings. Flatten and replant the old rehabilitation area. Rehabilitate stockpile bases. Rehabilitation Plan: Earthworks Required: Respread or redistribute stockpile material across pinnacles and areas of poor regrowth. Reshape to natural looking landscape and rip entire surface. Blade track roll old rehabilitation areas and rip and replant. Rehabilitate stockpile base area, leaving 1 metre of soil and ripping. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil). and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 32 ‘ 13.4 ” Photo Long: 105 ° 39 ‘ 14.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 79 Mine Lease: 100 Field No: 17-3 Area (ha): 93.2 Field Description: Mosaic of old and new workings, some pinnacle areas, no stockpiles. Pinnacles: Hard, 1 to 2 metres. Rehabilitation: None. Regrowth: Variable regrowth, generally poor quality. Weed Infestation: Medium to high. Soil: Some soil remaining. No stockpiles. Conservation Status: Low. Objective: To regrow native forest by landscaping existing soil, ripping and replanting. Rehabilitation Plan: Earthworks Required: Respread or redistribute local soil material across pinnacles. Blade track roll to flatten heavy weed areas. Landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 32 ‘ 52.3 ” Photo Long: 105 ° 39 ‘ 26.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 80 Mine Lease: 100 Field No: 17.6 Area (ha): 16.0 Field Description: Large old pinnacle field, drop buckets used, some very deep voids. Some flatter areas with soil and regrowth. Pinnacles: Hard, deep voids, 3 to 5 metres. Rehabilitation: None. Regrowth: Poor. Weed Infestation: Low. Soil: Little soil remaining. No stockpiles. Conservation Status: Low Objective: To regrow native forest by backfilling pinnacle areas with any available soil or overburden and replant seedlings. If no backfill available then replant directly between pinnacles. For flatter areas with poor regrowth, rip and replant. Rehabilitation Plan: Earthworks Required: Import backfill and refill pinnacle voids as much as possible. Rip flatter areas of regrowth poor. Revegetation Activities: Plant seedlings. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 33 ‘ 1.7 ” Photo Long: 105 ° 39 ‘ 22.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 81 Mine Lease: 100 Field No: 17-5 Area (ha): 40.3 Field Description: Variable site from older mined/regrowth areas possibly > 50 years old to recent mining sites leaving limestone boulder scree pinnacle fields. Pinnacles: Hard, 1 to 2 metres. Rehabilitation: No rehabilitation as yet in recently mined areas. Regrowth: Moderately successful older regrowth patches. Weed Infestation: Medium. Soil: Soil remaining in older regrowth areas, minimal soil in recent mined areas. Conservation Status: Low. Objective: For areas not rehabilitated by the mine, regrow native forest by backfilling pinnacle areas with any available soil or overburden and planting seedlings. If no backfill available then replant directly between pinnacles. Rehabilitation Plan: Earthworks Required: Import backfill and refill pinnacle voids as much as possible. For flatter areas with poor regrowth, rip and replant. Revegetation Activities: Plant seedlings over reworked areas. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 33 ‘ 43.2 ” Photo Long: 105 ° 39 ‘ 38.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 82 Mine Lease: 100 Field No: 17-4 Area (ha): 20.9 Field Description: Variable site from older mined/regrowth areas possibly > 50 years old to recent mining sites leaving limestone boulder scree pinnacle fields. Pinnacles: Hard, 1 to 2 metres. Rehabilitation: No rehabilitation as yet in recently mined areas. Regrowth: Poor to moderately successful older regrowth patches. Weed Infestation: Low. Soil: Soil remaining in older regrowth areas, minimal soil in recent mined areas. Conservation Status: Uncertain – may be important nesting area for the Red Footed Booby. . Objective: For areas not rehabilitated by the mine, regrow native forest by backfilling pinnacle areas with any available soil or overburden and planting seedlings. If no backfill available then replant directly between pinnacles. Rehabilitation Plan: Earthworks Required: Import backfill and refill pinnacle voids as much as possible. For flatter areas with poor regrowth, rip and replant. Revegetation Activities: Plant seedlings over reworked areas. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 33 ‘ 46.3 ” Photo Long: 105 ° 39 ‘ 42.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task:83 Mine Lease: 100 Field No: 17-2 Area (ha): 190.0 Field Description: Mosaic of older mined and regrowth areas, some > 50 years old, and recent mining sites leaving limestone boulder scree pinnacle fields. Abuts National Park to West. Pinnacles: Hard, 2 to 4 metres. Rehabilitation: Some recent rehabilitation by mine, planting amongst pinnacles. Regrowth: Poor to moderately successful older regrowth patches. Exotic patches. Weed Infestation: High. Soil: Soil remaining in older regrowth areas, minimal soil in recent mined areas. Conservation Status: Low. Objective: For areas not rehabilitated by the mine, regrow native forest by backfilling pinnacle areas with any available soil or overburden and planting seedlings. If no backfill available then replant between pinnacles. For regrowth areas, flatten and replant dense exotic patches, thin out exotics from other areas. Rehabilitation Plan: Earthworks Required: For areas not rehabilitated by the mine, import backfill and refill pinnacle voids with as much as soil as possible. Blade/track roll to flatten heavy weed areas. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings over reworked areas. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 33 ‘ 40.7 ” Photo Long: 105 ° 39 ‘ 12.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 84 Mine Lease: 100 Field No: 17-1 Area (ha): 63.0 Field Description: Large pinnacle field with some deep voids. Pinnacles: Hard, 3 to 6 metres. Abuts National Park to west. Rehabilitation: Northern rehabilitated by mine in April 2001 with planting between pinnacles. Regrowth: Poor regrowth in pinnacle areas. Good mid-successional regrowth at forest edge. Weed Infestation: Medium. Soil: Minimal. Conservation Status: Low. Objective: For areas not rehabilitated by the mine, regrow native forest by backfilling pinnacle areas with any available soil or overburden and planting seedlings. If no backfill available then replant between pinnacles. Rehabilitation Plan: Earthworks Required: For areas not rehabilitated by the mine, import backfill and refill pinnacle voids with as much as soil as possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings over reworked areas. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 32 ‘ 50.9 ” Photo Long: 105 ° 38 ‘ 47.5 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 85 Mine Lease: 101 Field No: 17-7 Area (ha): 21.1 Field Description: Pinnacle field with fern beds, areas of advanced regrowth and a stockpile. Area not visited, viewed from distance. Pinnacles: Appear to be medium hardness, 2 metres or deeper. Rehabilitation: None. Regrowth: Good regrowth patch near road. Weed Infestation: Low. Soil: Some soil in regrowth areas. Stockpile. Conservation Status: Medium - Rehabilitation Priority #15. Objective: To regrow native forest by backfilling pinnacle areas with any available soil or overburden and replant seedlings. If no backfill available then replant directly between pinnacles. For flatter areas with poor regrowth, rip and replant. Rehabilitation Plan: Earthworks Required: Import backfill and refill pinnacle voids with as much soil as possible. Reshape to natural looking landscape and rip entire surface, including areas of poor regrowth, fern beds etc. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 31 ‘ 33.5 ” Photo Long: 105 ° 39 ‘ 2.2 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 86 Mine Lease: 136 Field No: 500 ft Quarry - 1 Area (ha): 6.1 Field Description: Mosaic of older mined and regrowth areas, some > 50 years old, and recent mining sites leaving limestone boulder scree pinnacle fields. Partially within and surrounded by National Park. Important as conservation area for the Christmas Island Frigate Bird. Pinnacles: Hard, 1 to 3 metres. Rehabilitation: Recent mine rehabilitation. Regrowth: Patches of established regrowth. Weed Infestation: Medium to high. Soil: Some soil remaining in regrowth areas, minimal in mining areas. Conservation Status: High - Rehabilitation Priority # 5. Objective: For areas not rehabilitated by the mine, to regrow native forest by backfilling poor regrowth areas with any available soil or overburden and replant seedlings. If no backfill available then replant directly between pinnacles. Rehabilitation Plan: Earthworks Required: For areas not rehabilitated by the mine, import backfill and refill pinnacle voids with as much soil as possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings either into backfill or between pinnacles. Species List: B (Terrace Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 25 ‘ 18.1 ” Photo Long: 105 ° 41 ‘ 14.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 87 Mine Lease: 136 Field No: 500 ft Quarry - 2 Area (ha): 19.8 Field Description: Mosaic of older mined and regrowth areas, some > 50 years old, and recent mining sites leaving limestone boulder scree pinnacle fields. Important as buffer between town and National Park and conservation area for the Christmas Island Frigate Bird. Pinnacles: Hard, to 1 metre. Rehabilitation: May be a small rehabilitation patch. Regrowth: Established regrowth. Weed Infestation: Medium to high. Soil: Some soil remaining in regrowth areas, minimal in mining areas. Conservation Status: High - Rehabilitation Priority # 5. Objective: Either use area for town development purposes or if not then regrow native forest by backfilling poor regrowth areas with any available soil or overburden and replant seedlings. If no backfill available then replant directly between pinnacles. Rehabilitation Plan: Earthworks Required: For areas not rehabilitated by the mine, import backfill and cover pinnacles with as much soil as possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings either into backfill or between pinnacles. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 25 ‘ 25.8 ” Photo Long: 105 ° 41 ‘ 17.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 88 Mine Lease: 135 Field No: 4-1 Area (ha): 29.5 Field Description: Deep pinnacle field, possibly 100 years old. Pinnacles: Deep pit area. Rehabilitation: None. Regrowth: Good regrowth within pit. Weed Infestation: Medium. Soil: Some soil present. Conservation Status: Low. Objective: Create a Mine Heritage Area. The area needs to be made safe. Sturdy and permanent fencing with signage will be required. Rehabilitation Plan: Earthworks Required: Nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Nil.


Other: Fencing and signage–

needs to be sturdy, durable and permanent.

Photo Lat: 10 ° 25 ‘ 28.3 ”

Photo Long: 105 ° 41 ‘ 29.3 “


Photo Date:1 November 2002


Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 89 Mine Lease: 133A Field No: 8-1 Area (ha): 289.2 Field Description: Very large field along east edge of airport. Mosaic with large pinnacle fields, stands of mid-successional regrowth and numerous stockpiles. Pinnacles: Medium to hard, 2 to 4 metres. Rehabilitation: None. Regrowth: Poor fern regrowth on pinnacles. Large patches of good mid- successional regrowth. Weed Infestation: Medium. Soil: Chalky soil in pinnacles. Good soil in regrowth areas. Numerous stockpiles. Conservation Status: Low Objective: The safety requirements of the airport and proposed extensions to the runway need to be determined prior to the finalisation of rehabilitation plans. It is expected that some area can be rehabilitated to native forest. Stockpiles can be removed for use as backfill and the base area rehabilitated. Rehabilitation Plan: Earthworks Required: Nil until airport requirements finalised. Some backfilling and landscaping of pinnacle areas is expected and rehabilitation of stockpile bases. Revegetation Activities: Replanting reworked. Species List: If required, C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 25 ‘ 28.3 ” Photo Long: 105 ° 41 ‘ 29.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 90 Mine Lease: 132 Field No: LB7-1 Area (ha): 69.2 Field Description: Mosaic of pinnacle and poor regrowth areas. Important as protection buffer for the Christmas Island Frigate Bird nesting sites. Pinnacles: Some area of pinnacles, hard, 1 to 2 metres. Rehabilitation: None. Regrowth: Poor quality regrowth with exotics. Weed Infestation: High. Soil: Some soil remaining. Conservation Status: Medium - Rehabilitation Priority # 16. Objective: This area may be developed as residential blocks. For any not subject to land subdivision, the aim should be to regrow native forest by backfilling over pinnacles, if soil available, and ripping and replanting. Rehabilitation Plan: Earthworks Required: For any not subject to land subdivision, import backfill and spread as soil layer across pinnacles. Rip and replant all areas of poor regrowth. Revegetation Activities: Plant seedlings. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 26 ‘ 40.8 ” Photo Long: 105 ° 42 ‘ 19.6 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 91 Mine Lease: 131 Field No: LB7-2 Area (ha): 4.5 Field Description: Established regrowth area. Pinnacles: None. Rehabilitation: None. Regrowth: Good mid-stage regrowth. Weed Infestation: Medium. Soil: Soil remaining. Conservation Status: Low. Objective: To encourage development of native forest by thinning out exotic vegetation. Rehabilitation Plan: Earthworks Required: nil. Revegetation Activities: Nil. Species List: Not applicable. Weed Program: Thin exotic trees with basal applications. Fertilizer Application: Nil. Photo Lat: 10 ° 27 ‘ 3.9 ” Photo Long: 105 ° 41 ‘ 58.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 92 Mine Lease: 130 Field No: LB3 Area (ha): 7.9 Field Description: Old mined area with regrowth patches and laydown area from Casino – sea containers, shed, fuel drums, remnant steel, old vehicles etc. Pinnacles: None. Rehabilitation: None. Regrowth: Good patches of regrowth in upper slopes. Weed Infestation: Medium. Soil: Some soil remaining. Conservation Status: High - Rehabilitation Priority # 8. Important as groundwater resources for Island and Casino. Objective: To cleanup site and prevent the potential for groundwater contamination. Regrow native vegetation on poor regrowth areas by landscaping, ripping and planting seedlings. Rehabilitation Plan: Earthworks Required: For poor regrowth areas, reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings over reworked ground. Species List: B (Terrace Deep Soil) and C (Plateau or Terrace Shallow Soil). Weed Program: Annual maintenance program. Fertilizer Application: For reworked areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 27 ‘ 30.9 ” Photo Long: 105 ° 42 ‘ 10.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 93 Mine Lease: 129 Field No: LB2-1 Area (ha): 13.6 Field Description: Areas of established rehabilitation (.20 years old) and early stage rehabilitation (2 years old) at recently mined areas. Pinnacles: Small field of hard pinnacles, 1 to 2 metres. Rehabilitation: Recent rehabilitation direct into mined out pinnacle area. Regrowth: Medium quality rehabilitation, many exotics. Weed Infestation: Medium. Soil: Soil present in older regrowth areas, some soil in recently mined areas. Conservation Status: Medium - Rehabilitation Priority # 20. Objective: To regrow native forest over recently mined areas and encourage the continued development of native forest thinning exotics at established regrowth stands. Rehabilitation Plan: Earthworks Required: If the recent rehabilitation is unsuccessful, then import backfill and spread as soil layer across rehabilitation area/pinnacles to depth 1 metre and rip entire surface. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil), C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: For established regrowth, thin exotic trees with basal applications. Fertilizer Application: For rehabilitation areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 6.1 ” Photo Long: 105 ° 42 ‘ 3.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 94 Mine Lease: 128 Field No: LB2-1 Area (ha): 2.7 Field Description: Old mined area with established regrowth. Pinnacles: Pushed up limestone boulders to 2 metres. Rehabilitation: None. Regrowth: Medium quality regrowth, 50% exotics. Weed Infestation: High. Soil: Little soil remaining. Conservation Status: Medium - Rehabilitation Priority # 17. Objective: There may be scope to utilise this site for alternative land use, otherwise encourage native forest development by thinning out exotics from regrowth areas and ripping sides of road and bulldoze rubble piles. Rehabilitation Plan: Earthworks Required: Bulldoze rubble piles and rip side of road. Revegetation Activities: Plant seedlings at reworked areas. Species List: B (Terrace Deep Soil) and C (Plateau or Terrace Shallow Soil). Weed Program: Thin exotic trees with basal applications. Annual maintenance program. Fertilizer Application: For rehabilitation areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 4.3 ” Photo Long: 105 ° 42 ‘ 26.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 95 Mine Lease: 128 Field No: LB1-2 Area (ha): 2.4 Field Description: Mixed area with recent mining/rehabilitation and old deep valley excavations. High vertical cliff faces fronting valley from access road. Pinnacles: Pinnacle boulder scree at recent mining area, to 1 metre. Rehabilitation: Early stage rehabilitation with coconut in species mix. Regrowth: Poor quality regrowth with exotics. Weed Infestation: Medium. Soil: Little soil remaining. Conservation Status: Medium - Rehabilitation Priority # 17. Objective: To regrow native forest over recently mined areas, importing soil and replanting if rehabilitation unsuccessful. Make area safe with regard to public access. Rehabilitation Plan: Earthworks Required: If the recent rehabilitation is unsuccessful, then import backfill and spread as soil layer across rehabilitation area/pinnacles to depth 1 metre and rip entire surface. Revegetation Activities: Plant seedlings over any reworked areas. Species List: C (Plateau or Terrace Shallow Soil) and D (Pinnacles). Weed Program: Remove exotic species from rehabilitation area. Fertilizer Application: For rehabilitation areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Other: Sturdy, durable and permanent fencing and signage required for edges. Photo Lat: 10 ° 28 ‘ 10.1 ” Photo Long: 105 ° 42 ‘ 22.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 96 Mine Lease: 124 Field No: RH-2 Area (ha): 32.1 Field Description: Pinnacle field with fern beds. Abuts National park to north. Several stockpiles. Pinnacles: Medium hardness, 3 to 4 metres. Rehabilitation: None. Regrowth: Poor regrowth over most of pinnacle field (ferns), good regrowth at forest edge and in small cleared area west of road. Weed Infestation: Low. Soil: Little soil remaining. Conservation Status: Medium - Rehabilitation Priority # 18. Objective: To regrow native forest by replacing soil over pinnacle and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles to > 1 metre if possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 0.5 ” Photo Long: 105 ° 40 ‘ 50.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 97 Mine Lease: 121 Field No: RH-1 Area (ha): 16.9 Field Description: Mixed area with pinnacles, ferns and patches of early to mid-successional regrowth. Large stockpiles nearby. Pinnacles: Medium hardness, 2 to 3 metres. Rehabilitation: None. Regrowth: Poor pinnacle field regrowth, good early to mid-successional regrowth. Weed Infestation: Medium. Soil: Little soil in pinnacle field. Several large stockpiles. Conservation Status: Medium - Rehabilitation Priority # 18. Objective: To regrow native forest by replacing soil over pinnacle and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles to > 1 metre if possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: B (Terrace Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 20.1 ” Photo Long: 105 ° 40 ‘ 42.0 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 98 Mine Lease: 122 Field No: 11-1 Area (ha): 33.3 Field Description: Pinnacle and fern fields with patches of good regrowth. Numerous stockpiles. Borders National Park to west. Pinnacles: Soft, to 1 metre. Rehabilitation: None. Regrowth: Poo Weed Infestation: Low. Soil: Some soil in pinnacles. Large stockpiles. Conservation Status: Low ?????? Objective: To regrow native forest by replacing soil over pinnacles and poor regrowth areas and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles and poor regrowth areas to > 1 metre if possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 29 ‘ 25.7 ” Photo Long: 105 ° 39 ‘ 57.8 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 99 Mine Lease: 123 Field No: 11-2 Area (ha): 6.2 Field Description: Pinnacle and fern fields with patches of good fringing mid-successional regrowth. Several stockpiles. Surrounded by National Park. Pinnacles: Soft, to 1 metre. Rehabilitation: None. Regrowth: Poor Weed Infestation: Low. Soil: Some soil in pinnacles. Large stockpiles. Conservation Status: Low ?????? Objective: To regrow native forest by replacing soil over pinnacles and poor regrowth areas and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles and poor regrowth areas to > 1 metre, if possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 59.4 ” Photo Long: 105 ° 40 ‘ 11.1 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 100 Mine Lease: 125 Field No: 10-1 Area (ha): 37.7 Field Description: Pinnacle field with fringing mid-successional regrowth and some stockpiles. Intersects National Park at two locations. Pinnacles: Soft, 1 to 2 metres. Rehabilitation: None. Regrowth: Poor fern regrowth in pinnacle field, good mid-successional regrowth fringing edge of forest. Weed Infestation: Low. Soil: Little soil remaining. Conservation Status: Low ???? In primary rainforest and Abbott’s Booby area. Objective: To regrow native forest by replacing soil over pinnacles and poor regrowth areas, rip and plant seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles and poor regrowth areas to > 1 metre, if possible. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 31.8 ” Photo Long: 105 ° 40 ‘ 37.7 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 101 Mine Lease: 127 Field No: 10-3 Area (ha): 6.9 Field Description: Small field with pinnacles, fern beds and fringing early to mid-successional regrowth. Pinnacles: Soft, to 1 metre. Rehabilitation: None. Regrowth: Thick fern beds with mid-successional regrowth fringing edge of forest. Weed Infestation: Low. Soil: Some soil remaining. Conservation Status: Low ???? In primary rainforest and Abbott’s Booby area. Objective: To regrow native forest by replacing soil over pinnacles and poor regrowth areas (if any soil available), ripping and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles and poor regrowth areas to > 1 metre, if soil available. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 5.6 ” Photo Long: 105 ° 40 ‘ 56.3 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 102 Mine Lease: 126 Field No: 10-2 Area (ha): 3.5 Field Description: Small field with pinnacles, fern beds and fringing early to mid-successional regrowth. Pinnacles: Soft, to 1 metre. Rehabilitation: None. Regrowth: Thick fern beds with mid-successional regrowth fringing edge of forest. Weed Infestation: Low. Soil: Some soil remaining. Conservation Status: Low ???? In primary rainforest and Abbott’s Booby area. Objective: To regrow native forest by replacing soil over pinnacles and poor regrowth areas (if any soil available), ripping and planting seedlings. Rehabilitation Plan: Earthworks Required: Respread or redistribute soil stockpiles over pinnacles and poor regrowth areas to > 1 metre, if soil available. Reshape to natural looking landscape and rip entire surface. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil) and D (Pinnacles). Weed Program: Annual maintenance program. Fertilizer Application: 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 28 ‘ 2.5 ” Photo Long: 105 ° 40 ‘ 55.4 “



Christmas Island Mined Land Rehabilitation Task Register - November 2002 Task: 103 Mine Lease: 133B Field No: 6-1 Area (ha): 208.1 Field Description: Mosaic of different areas and land use types: small pinnacle field, established regrowth, stockpiles, Shire land fill, landscaping borrow pits and airport redevelopment. Intersects National Park at one location. Pinnacles: Small area near rubbish tip, soft, to 1 metre. Rehabilitation: None. Regrowth: Areas of established regrowth, possible > 40 years old. Weed Infestation: Medium to high. Soil: Some soil remaining in situ. Numerous stockpiles. Conservation Status: Low. Objective: Rehabilitation plans in abeyance until other land use planning is finalised, apart from removing stockpiles. For areas not required by Shire, encourage the development of native forest by thinning out exotics from regrowth areas and ripping and replanting of any poor regrowth areas and ex-stockpile bases. Rehabilitation Plan: For areas excluded from town planning requirements. Earthworks Required: Remove stockpiles and rip stockpile base and any poor regrowth areas. Revegetation Activities: Plant seedlings. Species List: A (Plateau Deep Soil). Weed Program: For established regrowth, thin exotic trees with basal applications. For replanted areas, annual maintenance program. Fertilizer Application: For replanted areas, 100 kg/ha/year as 4 x 25 kg seasonal allotments, broadcast. Photo Lat: 10 ° 26 ‘ 41.3 ” Photo Long: 105 ° 40 ‘ 58.0 “



CHRISTMAS ISLAND MINED LAND REHABILITATION TASK …ga.gov.au/webtemp/image_cache/GA20959.pdf ·...

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