US Bridges

Anderson Valley Hw over Con Creek

Good

Mendocino County, California · 1.2 MI N of SR 128 · Structure no. 10C0089

Built
1938
87 years old
Condition
Good
inspected February 2024
Type
Slab
Concrete Continuous
Length
82 ft
5 main spans
Daily traffic
72
2011 count
Owner
County
County Highway Agency

About this bridge

Anderson Valley Hw over Con Creek is a concrete continuous slab carrying Anderson Valley Hw over Con Creek in Mendocino County, California. It was built in 1938, so it is 87 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 72 vehicles a day, projected to reach 55 by 2042. The structure is 82 ft (25 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAnderson Valley Hw
CrossesCon Creek
Location1.2 MI N of SR 128
RouteCounty Highway 0
Coordinates39.03102, -123.38715
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length82 ft (25 m)
Longest span22 ft (6.7 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72 (2011)
Projected traffic55 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Anderson Valley Hw over Con Creek built?

It was built in 1938, making it 87 years old in 2025.

What condition is Anderson Valley Hw over Con Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does Anderson Valley Hw over Con Creek carry?

About 72 vehicles per day (2011 count).

How long is Anderson Valley Hw over Con Creek?

The structure is 82 ft (25 m) long with a longest span of 22 ft (6.7 m) and a deck 29 ft wide.

Who owns Anderson Valley Hw over Con Creek?

It is owned by the County Highway Agency.