Presidio Parkway Phases I and II

This $852-million project consisted of constructing the new six-lane Presidio Parkway to replace Doyle Drive, a 1.6-mile segment of Route 101 that serves as the southern access point to the Golden Gate Bridge. During Phase I, work consisted of replacing a bridge on Highway 1, completing the southbound High Viaduct along Highway 101, and completing the new southbound Battery Tunnel and a temporary bypass. Phase II completed the remaining elements of Presidio Parkway, including the northbound High Viaduct and Battery Tunnel, the Main Post Tunnels, the realignment of the Highway 1/101 Interchange, and the new Girard Road Interchange. Phase II required 4 cut-and-cover tunnels along the alignment.

Prior to construction, Municon provided photo and video documentation of 40 historic brick and frame buildings in the San Francisco Army Presidio. Municon provided vibration monitoring at 30 locations adjacent to the construction, including the Disney Family Museum. The seismographs were remotely-read, which provided continuous round-the-clock monitoring and text-message alerting.

Muncion also provided sound monitoring at eight locations using remotely-read sound level meters for continuous round-the-clock monitoring. Municon additionally provided sound monitoring on an intermittent basis for protection of endangered avian populations at the direction of the project biologist.


San Francisco, CA

Project Owner


San Francisco County Transportation Authority (SFCTA)

Golden Link Concessionaire, LLC (GLC)


Phase I: R & L Brosamer (a Walsh company)

Phase II: Kiewit Infrastructure West, Co. / Flatiron West, Inc.




We would be happy to answer your questions and inquiries.


Municon West Coast, Inc.

661 Natoma Street

San Francisco, CA 94103

British Columbia:

Municon West Coast, Inc.

1538 Rand Avenue

Vancouver, B.C., V6P 3G2


Phone number (415) 641-2570