Ferguson Rockslide repair to speed access to Yosemite via Hwy 140

In April of 2006, a huge part of the mountain above Highway 140 south of El Portal and north of Mariposa came falling down. It blocked the road and still does. The name given was the Ferguson Rockslide. Luckily it did not dam up the Merced.

The road at hwy 140 to be repaired

Ferguson Ridge Rockfall near Yosemite

For years a “bypass” with 2 bridges across the river has been the mode – but they are single lane and at an angle. This really slows down traffic. There is a control light for one-way traffic.

After nine years of study, a solution is on the way. CALTRANS will construct a rock shed through the rockfall debris and restore SR-140 on the existing alignment. The US Federal Highway Administration is a driver on this and the plan is to permanently restore the section of of the road with a sort of “half tunnel” under the rockfall. These artist conceptions show the idea best:




Construction will start this summer. Completion will be by 2020.

Unrelated thought worth quoting: “Ain’t nothin’ that I’d rather do. Goin’ down…Party time. My friends are gonna be there too – I’m on the highway to hell.” – Ac Dc

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
This entry was posted in Uncategorized. Bookmark the permalink.

Comment on Facebook

3 Responses to Ferguson Rockslide repair to speed access to Yosemite via Hwy 140

  1. Maureen L says:

    take a look a the wikipedia article on the Ferguson Slide…

    if it’s correct, one of the reasons this has taken so long is endangered species considerations.

    taking the whole web of life seriously, the Limestone Salamander will be protected by capturing a bunch of them and moving them somewhere else. not sure if there’s plans to bring them back when the work is done.

  2. Maureen L says:

    hi, all,

    time flies — it was 2006!

    the info that it’s 9 years ago is correct.

    in a normal precipitation year (when we have them again), highway 140 is a major route into the park in winter.

    since the rockfall is east of the current slanted bridges, I think they can do this without impeding our access to the park during construction.

Leave a Reply

Your email address will not be published. Required fields are marked *