US Bridges

Bridge ST over Sacramento River

Fair

Colusa County, California · Between Main St/Riv RD · Structure no. 15C0001

Built
1980
45 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Steel
Length
652 ft
1 main span
Daily traffic
2,006
2014 count
Owner
County
County Highway Agency

About this bridge

Bridge ST over Sacramento River is a steel box beam or girders - single or spread carrying Bridge ST over Sacramento River in Colusa County, California. It was built in 1980, so it is 45 years old, younger 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 2,006 vehicles a day, roughly 10% of them trucks, projected to reach 3,734 by 2041. The structure is 652 ft (198.7 m) long and 38 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesBridge ST
CrossesSacramento River
LocationBetween Main St/Riv RD
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates39.21385, -122.00039
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.1 US tons
Inventory rating61.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20 + Mod
Structure length652 ft (198.7 m)
Longest span202 ft (61.6 m)
Deck width38 ft (11.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,006 (2014)
Projected traffic3,734 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed31.7 mi (51 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Bridge ST over Sacramento River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Bridge ST over Sacramento 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 July 2023.

How much traffic does Bridge ST over Sacramento River carry?

About 2,006 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Bridge ST over Sacramento River?

The structure is 652 ft (198.7 m) long with a longest span of 202 ft (61.6 m) and a deck 38 ft wide.

Who owns Bridge ST over Sacramento River?

It is owned by the County Highway Agency.