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Rockfall Protection - Route 395 Lee Vining 2016

Flexible rockfall fence posts installed on US Highway 395, Mono County, California

Rockfall Protection - Route 395 Lee Vining 2016

Flexible rockfall fence posts installed on US Highway 395, Mono County, California

Rockfall Protection - Route 395 Lee Vining 2016

Rockfall event occurring on March 12, 2017 retained behind 3 m Geobrugg GBE-500A-R flexible rockfall fence

Rockfall Protection - Route 395 Lee Vining 2016

Installed GUARD on the top support rope

 

System length

- 1050 m

 

Year of installation

2016

Initial situation

The Marina Fire burned 654 acres of steep slopes between its ignition on June 24, 2016 and its containment on July 7, 2016.  The fire was named for its proximity to the nearby old marina on Mono Lake. Prior to the fire, Caltrans had programmed a phased rockfall mitigation project to address rockfall originating from six cut slopes along US 395 from post mile 53.2 to 53.7.

Description

In Mono County, California temporary, flexible rockfall fences were installed to provide rockfall protection to US 395. 

Two Geobrugg flexible rockfall fences, 2,000 linear feet of GBE-500A-R (3 m height) and 1,500 linear feet of model GBE-500A-R (4 m height) were recommended and installed.

A unique aspect of this project was the uncertain location of a critical utility and design modifications that allowed the rapid installation of the fence posts while minimizing risk to the utility. 

Subsequent to the Marina Fire, this section of roadway experienced rockfall events from source areas outside the Caltrans right of way, and resulted in a need for rapid mitigation of the increased rockfall.

Customer

Caltrans

Engineering

Yeh and Associates / Caltrans

Contractor

Access Limited Construction

Protected object

Road

Corrosion protection

GEOBRUGG SUPERCOATING

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René Müller
   

René Müller

Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

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Geobrugg AG,Industriestrasse 21,5200 Brugg / Switzerland Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

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Olivia Sartorius

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Geobrugg AG

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Alexander Bittendorfer
   

Alexander Bittendorfer

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Isacco Toffoletto
   

Isacco Toffoletto

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Geobrugg AG Ticino,Via Brusada 5,6933 Muzzano / Switzerland

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