US Bridges

Fish Rock RD over Rancheria Creek

Fair

Mendocino County, California · 0.05 MI W SH 128 · Structure no. 10C0105

Built
1978
47 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
163 ft
2 main spans
Daily traffic
429
2011 count
Owner
County
County Highway Agency

About this bridge

Fish Rock RD over Rancheria Creek is a concrete continuous box beam or girders - multiple carrying Fish Rock RD over Rancheria Creek in Mendocino County, California. It was built in 1978, so it is 47 years old, younger 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 429 vehicles a day, roughly 6% of them trucks, projected to reach 384 by 2042. The structure is 163 ft (49.6 m) long and 32 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

Location

Open in Google Maps
CarriesFish Rock RD
CrossesRancheria Creek
Location0.05 MI W SH 128
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates38.92022, -123.29397
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.3 US tons
Inventory rating60.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length163 ft (49.6 m)
Longest span80 ft (24.4 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic429 (2011)
Projected traffic384 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 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 Fish Rock RD over Rancheria Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Fish Rock RD over Rancheria 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 Fish Rock RD over Rancheria Creek carry?

About 429 vehicles per day (2011 count), of which roughly 6% are trucks.

How long is Fish Rock RD over Rancheria Creek?

The structure is 163 ft (49.6 m) long with a longest span of 80 ft (24.4 m) and a deck 32 ft wide.

Who owns Fish Rock RD over Rancheria Creek?

It is owned by the County Highway Agency.