US Bridges

S Mountain RD over Santa Clara River

Fair

Ventura County, California · 0.2 MI S/O SR 126 · Structure no. 52C0009

Built
1953
72 years old, rebuilt 1970
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
938 ft
12 main spans
Daily traffic
2,900
2022 count
Owner
County
County Highway Agency

About this bridge

S Mountain RD over Santa Clara River is a steel continuous stringer/multi-beam or girder carrying S Mountain RD over Santa Clara River in Ventura County, California. It was built in 1953 and reconstructed in 1970, so it is 72 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 2,900 vehicles a day, roughly 2% of them trucks, projected to reach 4,699 by 2044. The structure is 938 ft (285.9 m) long and 36 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesS Mountain RD
CrossesSanta Clara River
Location0.2 MI S/O SR 126
RouteCounty Highway 0
CountyVentura County
StateCalifornia
Coordinates34.34775, -119.05119
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length938 ft (285.9 m)
Longest span80 ft (24.4 m)
Deck width36 ft (11.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2022)
Projected traffic4,699 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 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 S Mountain RD over Santa Clara River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1970.

What condition is S Mountain RD over Santa Clara River 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 S Mountain RD over Santa Clara River carry?

About 2,900 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is S Mountain RD over Santa Clara River?

The structure is 938 ft (285.9 m) long with a longest span of 80 ft (24.4 m) and a deck 36 ft wide.

Who owns S Mountain RD over Santa Clara River?

It is owned by the County Highway Agency.