US Bridges

Hearst-Willits RD over String Creek

Fair

Mendocino County, California · 4.3 MI NW Reynolds HWY · Structure no. 10C0138

Built
1956
69 years old
Condition
Fair
inspected September 2021
Type
Tee Beam
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
208
2011 count
Owner
County
County Highway Agency

About this bridge

Hearst-Willits RD over String Creek is a prestressed concrete tee beam carrying Hearst-Willits RD over String Creek in Mendocino County, California. It was built in 1956, so it is 69 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 208 vehicles a day, roughly 1% of them trucks, projected to reach 174 by 2041. The structure is 44 ft (13.4 m) long and 21 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesHearst-Willits RD
CrossesString Creek
Location4.3 MI NW Reynolds HWY
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates39.46436, -123.27296
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span43 ft (13.1 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic208 (2011)
Projected traffic174 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Hearst-Willits RD over String Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Hearst-Willits RD over String 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 September 2021.

How much traffic does Hearst-Willits RD over String Creek carry?

About 208 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Hearst-Willits RD over String Creek?

The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13.1 m) and a deck 21 ft wide.

Who owns Hearst-Willits RD over String Creek?

It is owned by the County Highway Agency.