US Bridges

N State ST over Hensley Creek

Fair

Mendocino County, California · 0.2 MI S Lake Mndocino DR · Structure no. 10C0066

Built
1973
52 years old, rebuilt 1983
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
15,190
2011 count
Owner
County
County Highway Agency

About this bridge

N State ST over Hensley Creek is a concrete continuous slab carrying N State ST over Hensley Creek in Mendocino County, California. It was built in 1973 and reconstructed in 1983, so it is 52 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 5 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 15,190 vehicles a day, roughly 5% of them trucks, projected to reach 11,123 by 2042. The structure is 90 ft (27.4 m) long and 66 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesN State ST
CrossesHensley Creek
Location0.2 MI S Lake Mndocino DR
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates39.18547, -123.20988
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
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 typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span32 ft (9.8 m)
Deck width66 ft (20.1 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,190 (2011)
Projected traffic11,123 by 2042
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 N State ST over Hensley Creek built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1983.

What condition is N State ST over Hensley 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 February 2024.

How much traffic does N State ST over Hensley Creek carry?

About 15,190 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is N State ST over Hensley Creek?

The structure is 90 ft (27.4 m) long with a longest span of 32 ft (9.8 m) and a deck 66 ft wide.

Who owns N State ST over Hensley Creek?

It is owned by the County Highway Agency.