US Bridges

Camp 1 Ten Mile RD over South Fork Tenmile River

Poor

Mendocino County, California · 1.88 Miles East of SR 1 · Structure no. 10C0079

Built
1965
60 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
2
2014 count
Owner
County
County Highway Agency

About this bridge

Camp 1 Ten Mile RD over South Fork Tenmile River is a steel stringer/multi-beam or girder carrying Camp 1 Ten Mile RD over South Fork Tenmile River in Mendocino 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2 vehicles a day, projected to reach 8 by 2041. The structure is 54 ft (16.5 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCamp 1 Ten Mile RD
CrossesSouth Fork Tenmile River
Location1.88 Miles East of SR 1
RouteCounty Highway 0
Coordinates39.52486, -123.73306
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.2 US tons
Inventory rating32.5 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span50 ft (15.2 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (2014)
Projected traffic8 by 2041
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$274,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Camp 1 Ten Mile RD over South Fork Tenmile River built?

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

What condition is Camp 1 Ten Mile RD over South Fork Tenmile River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Camp 1 Ten Mile RD over South Fork Tenmile River carry?

About 2 vehicles per day (2014 count).

How long is Camp 1 Ten Mile RD over South Fork Tenmile River?

The structure is 54 ft (16.5 m) long with a longest span of 50 ft (15.2 m) and a deck 14 ft wide.

Who owns Camp 1 Ten Mile RD over South Fork Tenmile River?

It is owned by the County Highway Agency.