Easier installation, more durable protection — the...

Easier installation, more durable protection —the economical solution

Reference list / March 2012

RCN Rolled Cable Net®

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Rolled cable net as overblasting correction Abiquiu Dam, Rio Arriba County / NM

Previous work to decrease the angle of slope in the dam’s earthen portion destabilized slope. This required the addition of the RCN to assist the rockfall barrier originally installed.

Project: Abiquiu Dam, USACE

Location: Abiquiu, NM

Year of installation: 2011

Problem: Raveling rock caused by overblasting / benching

Ground characteristics: Sandstone, shales and mudstones

Protected object: Service road adjacent to pump house

Protection measure: Draped netting, RCN 0/8,6/250 (9.8 inch opening)

Panels: 11.5 ft x 98.5 ft, TECCO G65/3mm secondary mesh

Installation: Man-lift

Dimensions: 132,300 ft2, approx. 103 ft long x 112 ft high

Remarks: Part of total solution that included low energy

100 kJ rockfall barrier at bottom of slope and

RCN Rolled Cable Net®.

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Project: Dix Dam, Kentucky Utilities

Location: Mercer County, Harrodsburg, KY

Year of Installation: 2011

Problem: Unstable slope; raveling rock

Ground characteristics: Weathered rock

Protected object: Hydroelectric power station intake infrastructure


Panels: 11.5 ft x 98.5 ft, no secondary mesh

Installation: Man-lift


Remarks: Part of total solution that included rockfall barriers,

pinned SPIDER® mesh and RCN Rolled Cable Net®

Slope protection is increasingly essential for 85-year old Dix Dam.

Rolled cable net as unstable slope solution Dix Dam, Mercer County / KY

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Rolled cable net as rockfall protection in mine pit Ely Mine, Ely / NV

Project: Ely Mine, NV

Location: Ely, NV


Problem: Rock slide in mine pit

Ground characteristics: Altered sediments

Protected object: Utility road, haul trucks, pit below

Protection measure: Draped netting, RCN 0/8,6/250 (9.8 inch opening),

Panels: 11.5 ft x 98.5 ft, 2” chain link secondary mesh

Installation: Mining equipment

Dimensions: 36,153 ft2, various

Remarks: Part of total solution that included RCN attenuator

system and RCN Rolled Cable Net®.

An entire hillside destabilized and a rock avalanche of 500,000 cubic yards impacted the RCN drape.

For details please see picture at the bottom of the next page.

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A boulder over 5 feet in diameter impacted the RCN attenuator system, with no damage to the system.

The barrier held and kept the material from sliding into the pit, preventing the equipment below from being buried.

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Project: I-70 rockfall mitigation, Colorado DOT

Location: Georgetown Hill, Georgetown, CO


Problem: Raveling slope brow

Ground characteristics: Angular to sub angular colluvial deposits raveling

from brow of slope.

Protected object: Busy interstate highway


Panels: 15 ft x 150 ft, 2” chain link mesh secondary mesh

Installation: Man-lift, crane, helicopter


Remarks: Custom-sized RCN Rolled Cable Net® was employed

for greater savings in labor and material costs.

During ski season, about 30,000 vehicles travel I-70’s Georgetown Hill daily.

The 1.7 mile stretch of steep grade cuts through a mountain and is considered a high-risk area for rockfall by CDOT.

The last fatality along this incline was in 2003.

Rolled cable net as falling rock protection Interstate 70, Georgetown / CO

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About 90% of CDOT’s rockfall mitigation program relies on draped netting.

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Rolled cable net as protection for two-lane road, US Route 19, “The Narrows”, Lewis County / WV

Project: The Narrows, WVDOT, Division of Highways

Location: Weston, WV


Problem: Unstable slopes from differential weathering

Ground characteristics: Weak shales and coal interbedded with resistant sand-

stone blocks with large joint spacing

Protected object: Busy two lane road


Panels: 11.5 ft x 98.5 ft, 2” chain link secondary mesh

Installation: Man-lift and crane

Dimensions: 65,530 ft2, 2800 ft long x 80 ft high

Remarks: Part of total solution that included pinned SPIDER® mesh

for outcrops and RCN Rolled Cable Net® for entire slope

Due to high precipitation, the cut-slope along a 0.2 mile stretch of US 19 was a high-risk area for slope failure. The extensive colluvium character is highly susceptible to sliding.

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A design-build concept was used jointly with contractor, manufacturer and investigating engineer.

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It is the task of our engineers and partners to analyze the problem to-

gether with you in detail and then, together with local consultants, to

present solutions. Painstaking planning is not the only thing you can

expect from us, however; since we have our own production plants on

four continents, we can offer not only short delivery paths and times,

but also optimal local customer service. With a view towards a trouble-

free installation, we deliver preassembled and clearly identifi ed system

components right to the construction site. There we provide support, if

desired, including technical support – from installation right on up until

acceptance of the structure.

Rockfall barriers

Rockfall drapes

Slope stabilization systems

Debris fl ow barriers

Avalanche prevention structures

Open pit rockfall barriers

Special applications

Geobrugg protects people and infrastructures from the forces

of nature

Geobrugg North America, LLC22 Centro AlgodonesAlgodones, New Mexico 87001Phone 505-771-4080 • Fax 505-771-4081www.geobrugg.com

A company of the BRUGG GroupISO 9001 certifi ed

Easier installation, more durable protection — the...

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