US Bridges

Hearst-Willits RD over Salt Creek

Good

Mendocino County, California · 4.4 MI NE JCT Tomki RD · Structure no. 10C0192

Built
1970
55 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
27 ft
1 main span
Daily traffic
108
2011 count
Owner
County
County Highway Agency

About this bridge

Hearst-Willits RD over Salt Creek is a wood or timber stringer/multi-beam or girder carrying Hearst-Willits RD over Salt Creek in Mendocino County, California. It was built in 1970, so it is 55 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 108 vehicles a day, roughly 1% of them trucks, projected to reach 163 by 2041. The structure is 27 ft (8.2 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesHearst-Willits RD
CrossesSalt Creek
Location4.4 MI NE JCT Tomki RD
RouteCounty Highway 0
Coordinates39.48516, -123.21827
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating34.6 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic108 (2011)
Projected traffic163 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hearst-Willits RD over Salt Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Hearst-Willits RD over Salt 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 September 2023.

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

About 108 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Hearst-Willits RD over Salt Creek?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 18 ft wide.

Who owns Hearst-Willits RD over Salt Creek?

It is owned by the County Highway Agency.