US Bridges

East Road over Salt Hollow Creek

Fair

Mendocino County, California · 2.15 MI N SH 20 · Structure no. 10C0058

Built
1940
85 years old, rebuilt 1961
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
4,439
2011 count
Owner
County
County Highway Agency

About this bridge

East Road over Salt Hollow Creek is a steel stringer/multi-beam or girder carrying East Road over Salt Hollow Creek in Mendocino County, California. It was built in 1940 and reconstructed in 1961, so it is 85 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 4,439 vehicles a day, roughly 2% of them trucks, projected to reach 5,562 by 2042. The structure is 27 ft (8.3 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesEast Road
CrossesSalt Hollow Creek
Location2.15 MI N SH 20
RouteCounty Highway 0
Coordinates39.25628, -123.20051
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating30 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.3 m)
Longest span24 ft (7.3 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,439 (2011)
Projected traffic5,562 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 East Road over Salt Hollow Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1961.

What condition is East Road over Salt Hollow 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 East Road over Salt Hollow Creek carry?

About 4,439 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is East Road over Salt Hollow Creek?

The structure is 27 ft (8.3 m) long with a longest span of 24 ft (7.3 m) and a deck 35 ft wide.

Who owns East Road over Salt Hollow Creek?

It is owned by the County Highway Agency.