Ferguson Slide Permanent Restoration Project

On April 29, 2006, a big part of the Ferguson Ridge along Highway 140 below El Portal fell onto the highway. It completely covered the road – and still does today. I’ve blogged about it a lot. So now CalTrans is working on the project to reopen and restore full access to the section of State Route 140. There are 7 alternatives are being considered with costs from $18 million to $378 million.

Alternative C: Realign the highway to the northeast, spanning the Merced River and bypassing the rockslide. The highway would cut through the mountain across from the rockslide and then span back across the river where it would meet the existing alignment. Two bridges would be constructed across the river.

Alternative T: Realign the highway to the northeast, spanning the Merced River and bypassing the rockslide. The highway would tunnel through the mountain across from the rockslide and then span back across the river where it would meet the existing alignment. Two bridges would be constructed across the river.

Alternative T-3: Construct a tunnel on a new alignment, tunneling into the west canyon wall, under the rockslide, and realigning with the existing highway.

Alternative S: Realign the highway to the northeast, spanning the Merced River with two bridges and bypassing the rockslide with a hillside viaduct.

Alternative S-2: Realign the highway to the northeast, spanning the Merced River with two steel truss bridges, or tied arch bridges, and bypassing the rockslide with a hillside viaduct.

Alternative R: Construct a rockshed through the rockfall debris (talus) and restore State Route 140 on the existing alignment.

No Build: State Route 140 would remain damaged and blocked by the rockslide. Temporary bridges will remain in place. This alternative would not meet the Purpose (restore full use of SR 140) and Need (restore safety, security, and welfare of communities affected by the slide) of the project.

Where are things today? Distribution of the Draft Environmental Impact Statement/Environmental Impact Report took place from Nov 2011 to January 13, 2012

 

Unrelated thought worth quoting: I’m sailing away. Set an open course for the Virgin Sea. ‘Cause I’ve got to be free, free to face a life that’s ahead of me. On board I’m the captain, so climb aboard . . . Come sail away come sail away come sail away with me.” – STIX 

*MrHalfDome™ – Rick Deutsch – www.HikeHalfDome.com

One Best Hike: Yosemite’s Half Dome

About Mr Half Dome - Rick Deutsch

Mr Half Dome. Has written the only half dome hiking guide, One Best Hike: Yosemite's Half Dome. Has hiked it 31 times to day. Lives in San Jose, CA Available for presentations. Carpe Diem Experience, LLC
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2 Responses to Ferguson Slide Permanent Restoration Project

  1. Maureen L says:

    Do the alternatives include expected downtime for the road?

    How much of 140 would be inaccessible, and in what seasons of the year?

    Or do some of the alternatives allow access to the existing road and temporary bridges while under construction?

    • Mr Half Dome - Rick Deutsch says:

      They haven’t gotten to that fidelity on the planning yet. 140 would probably be open via a road coordinator. Too much traffic needs to get to/from Mariposa to shut it all the way down.

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