US Bridges

State Route 89 over West Fork Carson River

Fair

Alpine County, California · 10-ALP-089-21.46 · Structure no. 31 0017

Built
1960
65 years old, rebuilt 2019
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
1 main span
Daily traffic
3,200
2019 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 1960 and reconstructed in 2019, so it is 65 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.

It carries about 3,200 vehicles a day, roughly 14% of them trucks, projected to reach 4,800 by 2041. The structure is 48 ft (14.7 m) long and 34 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesState Route 89
CrossesWest Fork Carson River
Location10-ALP-089-21.46
RouteState Highway 89
Coordinates38.77762, -119.91893
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating92.2 US tons
Inventory rating70.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length48 ft (14.7 m)
Longest span47 ft (14.3 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2019)
Projected traffic4,800 by 2041
Trucks14%
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 1960, making it 65 years old in 2025. It was reconstructed in 2019.

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 3,200 vehicles per day (2019 count), of which roughly 14% are trucks.

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

The structure is 48 ft (14.7 m) long with a longest span of 47 ft (14.3 m) and a deck 34 ft wide.

Who owns State Route 89 over West Fork Carson River?

It is owned by the State Highway Agency.