U.S. HIGHWAY 101
U.S. HIGHWAY 101 in 04-Mrn-101-9.63-Srf, Marin County, California received a condition grade of B (69/100). Built in 1958, the bridge carries 172K vehicles daily on U.S. HIGHWAY 101 over Ggt Bellam Andersen.
Component Ratings
The riding surface — evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
U.S. HIGHWAY 101 is a 68-year-old bridge located 04-Mrn-101-9.63-Srf in Marin County, California. The bridge carries U.S. HIGHWAY 101 over Ggt Bellam Andersen with 8 traffic lanes, handling approximately 172K vehicles per day. Built in 1958 and reconstructed in 2003, the structure spans 312.1 meters.
The bridge received a Condition Grade of B (69/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
U.S. HIGHWAY 101 has a Condition Score of 69/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
U.S. HIGHWAY 101 was built in 1958 and reconstructed in 2003, making it 68 years old. The average bridge age in the United States is 48 years.
U.S. HIGHWAY 101 carries approximately 172K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 312.1 meters long and located on U.S. HIGHWAY 101 in 04-Mrn-101-9.63-Srf, Marin County, California.
No, U.S. HIGHWAY 101 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
U.S. HIGHWAY 101 is located 04-Mrn-101-9.63-Srf in Marin County, California. The bridge carries U.S. HIGHWAY 101 over Ggt Bellam Andersen. Its coordinates are 37.957081, -122.508731. It is maintained by State Highway Agency.
U.S. HIGHWAY 101 carries U.S. HIGHWAY 101 over Ggt Bellam Andersen. The bridge is 312.1 meters long and was built in 1958, with reconstruction in 2003.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.