US Bridges

State Route 89 over West Fork Carson River

Fair

Alpine County, California · 10-ALP-089-21.31 · Structure no. 31 0003

Built
1940
85 years old, rebuilt 1980
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
2,150
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 89 over West Fork Carson River is a steel stringer/multi-beam or girder carrying State Route 89 over West Fork Carson River in Alpine County, California. It was built in 1940 and reconstructed in 1980, so it is 85 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 2,150 vehicles a day, roughly 13% of them trucks, projected to reach 1,168 by 2045. The structure is 55 ft (16.8 m) long and 35 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesState Route 89
CrossesWest Fork Carson River
Location10-ALP-089-21.31
RouteState Highway 89
Coordinates38.77504, -119.82292
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating19.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length55 ft (16.8 m)
Longest span55 ft (16.8 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,150 (2009)
Projected traffic1,168 by 2045
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 89 over West Fork Carson River built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1980.

What condition is State Route 89 over West Fork Carson 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 2023.

How much traffic does State Route 89 over West Fork Carson River carry?

About 2,150 vehicles per day (2009 count), of which roughly 13% are trucks.

How long is State Route 89 over West Fork Carson River?

The structure is 55 ft (16.8 m) long with a longest span of 55 ft (16.8 m) and a deck 35 ft wide.

Who owns State Route 89 over West Fork Carson River?

It is owned by the State Highway Agency.