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US-101 Rockslide Repair DO (EA 04-1V300)

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State & Local

Contract Overview

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AI Contract Overview

Caltrans District 4 Bay Area/Oakland is forecasting a project titled US-101 Rockslide Repair DO (EA 04-1V300) to address a rockslide on southbound US-101 at post mile 0.4, just south of Waldo Tunnel in unincorporated Marin County, California. The incident released approximately 2,000 cubic yards of debris across an area 40 feet wide and 200 feet long, resulting in the damage of a 4-foot-high fence and approximately 220 feet of k-rail. Because the slope remains unstable with overhanging rocks, immediate repair is required to maintain the integrity of the State Highway System. The project is classified under NAICS code 237310 and was posted on July 9, 2026. The scope of work includes removing loose material and overhanging rocks from the slope and behind the k-rail, followed by grading to restore stability. Additionally, the contractor will replace the damaged 4-foot-high fence, repair or replace the damaged k-rail, and reestablish any impeded drainage. Temporary traffic control will be implemented throughout the construction process. From an environmental standpoint, the project has been granted a Class 1 Existing Facilities exemption under CEQA, as no significant environmental impacts are anticipated.

General Info

Repair 2,000 cubic yards of rockslide on US-101, restore k-rail, fence, drainage, and stabilize slope.

Agency

California → Caltrans, District 4 - Bay Area/Oakland

NAICS

237310 - Highway, Street, and Bridge Construction

Place of Performance

Set-Aside

NONE

Documents

No documents available

Documents will appear here when they are available.

AI Contract Breakdown

Uniform Contract Format

Timeline

PostedJul 9

forecast

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Organization & Contact Information

AgencyCalifornia → Caltrans, District 4 - Bay Area/Oakland

Contacts1 person available

OfficeN/A

Organization / Agency

California → Caltrans, District 4 - Bay Area/Oakland

Office AddressN/A

Contacts

Juliane SmithSenior Environmental Scientist (NEPA/CEQA Specialist)

contact@example.gov

+1 (555) 000-0000

Full Description

Caltrans proposes repairing a rockslide that occurred on southbound US-101, just south of Waldo Tunnel, at post mile (PM) 0.4. The rockslide occurred as a result of a storm and released an estimated 2,000 cubic yards of rock and debris, overtopping the existing k-rail and entering the traveled way. The slide is approximately 40 feet wide and 200 feet long. Field Maintenance crews responded the same day as the incident by clearing debris and restoring roadway access. Inspections after the incident identified approximately 220 feet of damaged k-rail as well as a damaged 4-foot-high fence that was mounted on the barrier. The slope remains unstable, with loose and overhanding rocks at risk of falling. This condition necessitates immediate slope repair to uphold the integrity and usage of the State Highway System. Construction will involve removing loose material and overhanging rock on the slope and rocks and boulders behind the k-rail. The slope will be graded to restore stability and grade. The damaged 4-foot-high fence that is mounted on top of the barrier will be replaced and the damaged k-rail will be repaired or replaced. Any damaged or impeded drainage will be reestablished. Temporary traffic control will be implemented during construction.