US Bridges

Gazos Creek Road over Gazos Creek

Poor

San Mateo County, California · 3.3 MI East of Cloverdale · Structure no. 35C0187

Built
1982
43 years old
Condition
Poor
inspected April 2024
Type
Arch - Deck
Steel
Length
29 ft
1 main span
Daily traffic
218
2018 count
Owner
County
County Highway Agency

About this bridge

Gazos Creek Road over Gazos Creek is a steel arch - deck carrying Gazos Creek Road over Gazos Creek in San Mateo County, California. It was built in 1982, so it is 43 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 218 vehicles a day, roughly 11% of them trucks, projected to reach 700 by 2042. The structure is 29 ft (8.9 m) long. If it were closed, the detour would be 15.5 mi (25 km).

Location

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CarriesGazos Creek Road
CrossesGazos Creek
Location3.3 MI East of Cloverdale
RouteCounty Highway 0
CountySan Mateo County
StateCalifornia
Coordinates37.1953, -122.29563
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length29 ft (8.9 m)
Longest span28 ft (8.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic218 (2018)
Projected traffic700 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$93,000 (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Gazos Creek Road over Gazos Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Gazos Creek Road over Gazos Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Gazos Creek Road over Gazos Creek carry?

About 218 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is Gazos Creek Road over Gazos Creek?

The structure is 29 ft (8.9 m) long with a longest span of 28 ft (8.6 m).

Who owns Gazos Creek Road over Gazos Creek?

It is owned by the County Highway Agency.