US Bridges

N State ST over Orrs Creek

Fair

Mendocino County, California · 24.9 MI N Son CO Line · Structure no. 10C0091

Built
1926
99 years old, rebuilt 1950
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
44 ft
1 main span
Daily traffic
18,278
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

N State ST over Orrs Creek is a concrete tee beam carrying N State ST over Orrs Creek in Mendocino County, California. It was built in 1926 and reconstructed in 1950, so it is 99 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 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 18,278 vehicles a day, roughly 3% of them trucks, projected to reach 11,123 by 2042. The structure is 44 ft (13.4 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN State ST
CrossesOrrs Creek
Location24.9 MI N Son CO Line
RouteCity Street 0
CountyMendocino County
StateCalifornia
Coordinates39.15583, -123.20819
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span40 ft (12.2 m)
Deck width79 ft (24.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,278 (2017)
Projected traffic11,123 by 2042
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Orrs Creek built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1950.

What condition is N State ST over Orrs 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 Orrs Creek carry?

About 18,278 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is N State ST over Orrs Creek?

The structure is 44 ft (13.4 m) long with a longest span of 40 ft (12.2 m) and a deck 79 ft wide.

Who owns N State ST over Orrs Creek?

It is owned by the City or Municipal Highway Agency.