The following are the listed alternatives that Caltrans in considering.
Has Caltrans made known its preference and selected one of these alternatives as its preferred alternative?
Quote
From Caltrans District 10 Website
Fergurson Slide Restoration Project
Project Fact Sheet
Project Purpose: The purpose of the project is to reopen and restore full access to the section of State Route 140, which was damaged by the Ferguson rockslide. Currently, motorists use a temporary bypass route to travel this portion of State Route 140. Restoration of State Route 140 would eliminate inconvenient detours or extended commute times for residents, businesses, and workers in the area. Restoration of the route would also give travelers a direct route to Yosemite National Park and other destinations along State Route 140. Eight build alternatives and one no-build alternative are being considered.
Project Description: The California Department of Transportation (Caltrans), as assigned by the Federal Highway Administration propose to permanently restore the section of State Route 140 that was damaged by the Ferguson rockslide.
The following alternatives are being considered:
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.
Cost: Construction costs for the alternatives range from $18 million to $378 million
Funding Source: Federally funded through the Major Damage Permanent Restoration Program.
Edited 1 time(s). Last edit at 04/17/2012 01:42PM by plawrence.
