US Bridges

San Antonio Road over Harris Creek

Fair

Monterey County, California · 0.32 MI N Interlake RD · Structure no. 44C0058

Built
1969
56 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
350
2013 count
Owner
County
County Highway Agency

About this bridge

San Antonio Road over Harris Creek is a concrete continuous slab carrying San Antonio Road over Harris Creek in Monterey County, California. It was built in 1969, so it is 56 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 350 vehicles a day, roughly 31% of them trucks, projected to reach 277 by 2047. The structure is 73 ft (22.3 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSan Antonio Road
CrossesHarris Creek
Location0.32 MI N Interlake RD
RouteCounty Highway 0
CountyMonterey County
StateCalifornia
Coordinates35.80811, -120.98174
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2013)
Projected traffic277 by 2047
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was San Antonio Road over Harris Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is San Antonio Road over Harris 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 February 2025.

How much traffic does San Antonio Road over Harris Creek carry?

About 350 vehicles per day (2013 count), of which roughly 31% are trucks.

How long is San Antonio Road over Harris Creek?

The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns San Antonio Road over Harris Creek?

It is owned by the County Highway Agency.