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Caltrans outlines $300 million, five-year plan for Ferguson rock-shed to restore SR‑140
Summary
Caltrans project manager Corey Casey told the Mariposa County Board of Supervisors that a segmental rock‑shed — the agency's preferred alternative after environmental and geotechnical review — will cost roughly $300 million, require massive material staging and likely take about five years to build once state funding is secured.
Caltrans project manager Corey Casey told the Mariposa County Board of Supervisors on Feb. 18 that the agency is moving ahead with a segmentally launched rock shed to restore State Route 140 through the Ferguson slide area of the Merced River Canyon.
Casey said Caltrans abandoned earlier bridge and tunnel options because of environmental restrictions and engineering constraints. "The tunnel would be over 1.2 miles long ... probably over a billion dollars," he said; by comparison, the rock‑shed alternative, while expensive, is the more feasible option. "Our engineers…
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