US Bridges

Diamond Valley RD over Indian Creek

Fair

Alpine County, California · 0.8 MI E Airport RD · Structure no. 31C0010

Built
1956
69 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
157
1968 count
Owner
County
County Highway Agency

About this bridge

Diamond Valley RD over Indian Creek is a concrete continuous culvert carrying Diamond Valley RD over Indian Creek in Alpine County, California. It was built in 1956, so it is 69 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 157 vehicles a day, roughly 4% of them trucks, projected to reach 111 by 2045. The structure is 31 ft (9.4 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesDiamond Valley RD
CrossesIndian Creek
Location0.8 MI E Airport RD
RouteCounty Highway 0
Coordinates38.77718, -119.75939
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span11 ft (3.4 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic157 (1968)
Projected traffic111 by 2045
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Diamond Valley RD over Indian Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Diamond Valley RD over Indian Creek 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 September 2023.

How much traffic does Diamond Valley RD over Indian Creek carry?

About 157 vehicles per day (1968 count), of which roughly 4% are trucks.

How long is Diamond Valley RD over Indian Creek?

The structure is 31 ft (9.4 m) long with a longest span of 11 ft (3.4 m) and a deck 27 ft wide.

Who owns Diamond Valley RD over Indian Creek?

It is owned by the County Highway Agency.