US Bridges

San Mateo Road over San Mateo Creek

FairPosted for load

San Diego County, California · San Mateo Road over San M · Structure no. 2CA0004

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
125 ft
5 main spans
Daily traffic
4,300
2004 count
Owner
Federal
Navy / Marines

About this bridge

San Mateo Road over San Mateo Creek is a concrete continuous slab carrying San Mateo Road over San Mateo Creek in San Diego County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 4,300 vehicles a day, roughly 1% of them trucks, projected to reach 5,160 by 2043. The structure is 125 ft (38.1 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSan Mateo Road
CrossesSan Mateo Creek
LocationSan Mateo Road over San M
RouteFederal Lands Road 0
Coordinates33.41928, -117.53692
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length125 ft (38.1 m)
Longest span25 ft (7.6 m)
Deck width33 ft (10 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2004)
Projected traffic5,160 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$31,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was San Mateo Road over San Mateo Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is San Mateo Road over San Mateo Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does San Mateo Road over San Mateo Creek carry?

About 4,300 vehicles per day (2004 count), of which roughly 1% are trucks.

How long is San Mateo Road over San Mateo Creek?

The structure is 125 ft (38.1 m) long with a longest span of 25 ft (7.6 m) and a deck 33 ft wide.

Who owns San Mateo Road over San Mateo Creek?

It is owned by the Navy / Marines.