Georgina Community Presentation
Transcript of Georgina Community Presentation
GEORGINA ISLAND
Roads Upgrade and Drainage ProjectPresentation to The Community
March 4, 2014
2 Introduction
C.C. Tatham & Associates Ltd. (CCTA) retained by Georgina Island FirstNation (GIFN) to provide professional engineering services for upgrading ofapproximately 10 km of roads;
Introduction
Project includes: Assessment of existing roadway conditions;
Chief Joseph Snake Road, Loon Road, Bear Road and Root Road;
LVM Inc. providing geotechnical advice.
Sidewalk recommendations;
Cost estimates; Drainage improvements;
Life cycle analysis; Recommendations for cost effective reconstruction options;
3 Drainage Overview
Regrading and culvert replacement to provide uniform unobstructed ditches will improve surface drainage;
Chief Joseph Snake Road, Bear Road and Root Road
Drainage Review
Drainage outlets are blocked or missing, restricting flow; Existing ditching is poorly defined, shallow and overgrown;
Drainage concerns between Chief Joseph Snake Road, Turtle Road and the lake related to low topography and maintenance needs;
Outlet improvement at campground on Bear Road.
4 Road Overview
5 Road Overview
Ditching exists only on southwest side, poorly defined and overgrown;Loon Road
Install a French drain on northeast side to collect road surface runoff, discharging to southwest ditch;
Regrade southwest ditch to a uniform positive grade.
6 Geotechnical Evaluation
Thorough evaluation of current roadway conditions:
LVM Investigation
Roadway distresses; Granular base/subbase/surface treatment depths; Road structure materials.
Distresses related to: Relatively flat road profiles; Proximity to wetlands; Undefined outlets and high lake levels relative to road ditches
and road bases; Existing road structure is shallow, substandard granular material; Concluded existing pavements are well beyond their functional service
lives and major rehabilitation is required.
7 Rehabilitation Options
Place 100 mm granular material over existing pavement (utilizing materialquarried on site if available);
Rehabilitation Method - Foamed Asphalt Stabilization
Pulverize granular material and existing road structure to depth of 225mm;
Stabilize pavement surface with expanded (foamed) asphalt to depth of150 mm;
Double layer surface treatment; Regrade all ditches and replace driveway
and road cross culverts.
8 Rehabilitation Options
Full depth excavation;
Other Rehabilitation Options and Lifecycle Analysis
Pulverize asphalt; Mechanical reinforcement. Considers initial capital cost plus 20 years of maintenance; Full depth reconstruction has highest capital cost and 2nd highest
maintenance cost with crack sealing and repaving in year 15; Pulverizing has lowest capital cost and highest maintenance cost with
annual spray patching and surface treatment in years 8 and 16; Foamed asphalt stabilization has 2nd lowest capital cost and lowest
maintenance cost with surface treatment in years 10 and 20; Foamed asphalt stabilization is the most cost effective.
9 Cost Estimates
Foamed Asphalt Stabilization $ 5,560,000;
Construction Cost Estimates
Includes 10% contingency; Includes all drainage improvements within roadway; Assumes imported granular material, may be reduced by use of on-site
quarries; Does not include sidewalk costs; Does not include outlet cleaning/improvements.
10 Sidewalk
Sidewalk 1.5 m widening of south bound lane of road; Low traffic volumes and speeds minimize safety concerns; Delineation of the walkway by line painting; Winter maintenance completed by existing snow removal equipment; Does not alter the established drainage patterns; Does not require work beyond the right-of-way; Estimated construction cost approximately $392,000.
11 Sidewalk
12 Summary
Foamed asphalt stabilization with double surface treatment;
Summary
Most cost effective rehabilitative method to provide adequate structuralcapacity and meet functional service life expectations;
Rehabilitates existing road structure and minimizes placement of newgranulars, thereby reducing costs;
Double surface treatment for hard surfacing is a cost effective alternativeto hot mix asphalt and provides more flexibility during movement of thesubgrade due to frost actions and spring thaw;
Existing granular quarry material may be suitable for this rehabilitationmethod and result in further cost savings.
13 Next Steps
GIFN confirm preferred solution and construction schedule (2014/2015);
Next Steps
Liaison with agencies (MNR, DFO, LSRCA);
Survey drainage outlets;
Assess quality and quantity of island quarry material;
Prepare final design and tender documents;
Circulate to invited contractors for tendering;
Contract award and construction.
14 Contact Information
Ted Kruska, C.E.T., Project Manager
C.C. Tatham & Associates Ltd.t: (705)325-1753 x 225 f: 705)325-7420
Tim Collingwood, B.A.Sc., P.Eng., Director, Manager – Orillia Branch
C.C. Tatham & Associates Ltd.t: (705)325-1753 x 224 f: (705)325-7420
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