HOLLY STREET
HOLLY STREET in 04-Sm-101-8.40, San Mateo County, California received a condition grade of C (59/100). Built in 1954, the bridge carries 201K vehicles daily on HOLLY STREET over US Highway 101.
HOLLY STREET carries a C on the BridgeSafety Condition Score with 59/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1954 and is now 72 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. HOLLY STREET carries an average daily traffic count of 201,000 vehicles, with 6 lane(s) crossing US Highway 101. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
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
HOLLY STREET is a 72-year-old bridge located 04-Sm-101-8.40 in San Mateo County, California. The bridge carries HOLLY STREET over US Highway 101 with 6 traffic lanes, handling approximately 201K vehicles per day. Built in 1954 and reconstructed in 1987, the structure spans 89.3 meters.
The bridge received a Condition Grade of C (59/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 6/9 (fair), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
HOLLY STREET has a Condition Score of 59/100 (Grade C). Its deck is rated 6/9, superstructure 6/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
HOLLY STREET was built in 1954 and reconstructed in 1987, making it 72 years old. The average bridge age in the United States is 48 years.
HOLLY STREET carries approximately 201K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 89.3 meters long and located on HOLLY STREET in 04-Sm-101-8.40, San Mateo County, California.
No, HOLLY STREET is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
HOLLY STREET is located 04-Sm-101-8.40 in San Mateo County, California. The bridge carries HOLLY STREET over US Highway 101. Its coordinates are 37.513494, -122.256322. It is maintained by State Highway Agency.
HOLLY STREET carries HOLLY STREET over US Highway 101. The bridge is 89.3 meters long and was built in 1954, with reconstruction in 1987.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.