US Bridges

Surprise Valley RD over Bare Creek

Fair

Lassen County, California · 1.8 MI S of Modoc C.L. · Structure no. 07C0045

Built
1965
60 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
400
1978 count
Owner
County
County Highway Agency

About this bridge

Surprise Valley RD over Bare Creek is a concrete continuous culvert carrying Surprise Valley RD over Bare Creek in Lassen County, California. It was built in 1965, so it is 60 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 400 vehicles a day, roughly 10% of them trucks, projected to reach 655 by 2041. The structure is 39 ft (11.8 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesSurprise Valley RD
CrossesBare Creek
Location1.8 MI S of Modoc C.L.
RouteCounty Highway 0
CountyLassen County
StateCalifornia
Coordinates41.16297, -120.03483
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length39 ft (11.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (1978)
Projected traffic655 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Surprise Valley RD over Bare Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Surprise Valley RD over Bare 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 October 2023.

How much traffic does Surprise Valley RD over Bare Creek carry?

About 400 vehicles per day (1978 count), of which roughly 10% are trucks.

How long is Surprise Valley RD over Bare Creek?

The structure is 39 ft (11.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Surprise Valley RD over Bare Creek?

It is owned by the County Highway Agency.