US Bridges

State Route 108 over BNSF RY & AMTRAK

Fair

Stanislaus County, California · 10-STA-108-R32.34 · Structure no. 38 0011

Built
1972
53 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
129 ft
3 main spans
Daily traffic
14,400
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 108 over BNSF RY & AMTRAK is a concrete continuous box beam or girders - multiple carrying State Route 108 over BNSF RY & AMTRAK in Stanislaus County, California. It was built in 1972, so it is 53 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 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 14,400 vehicles a day, roughly 5% of them trucks, projected to reach 26,739 by 2046. The structure is 129 ft (39.3 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 108
CrossesBNSF RY & AMTRAK
Location10-STA-108-R32.34
RouteState Highway 108
Coordinates37.73801, -120.94107
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length129 ft (39.3 m)
Longest span62 ft (18.9 m)
Deck width76 ft (23.2 m)
Roadway width60 ft (18.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,400 (2015)
Projected traffic26,739 by 2046
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 108 over BNSF RY & AMTRAK built?

It was built in 1972, making it 53 years old in 2025.

What condition is State Route 108 over BNSF RY & AMTRAK 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 March 2024.

How much traffic does State Route 108 over BNSF RY & AMTRAK carry?

About 14,400 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is State Route 108 over BNSF RY & AMTRAK?

The structure is 129 ft (39.3 m) long with a longest span of 62 ft (18.9 m) and a deck 76 ft wide.

Who owns State Route 108 over BNSF RY & AMTRAK?

It is owned by the State Highway Agency.