US Bridges

State Route 175 over Dooley Creek

Fair

Mendocino County, California · 01-MEN-175-0.82 · Structure no. 10 0046

Built
1946
79 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
112 ft
5 main spans
Daily traffic
4,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 175 over Dooley Creek is a concrete continuous slab carrying State Route 175 over Dooley Creek in Mendocino County, California. It was built in 1946, so it is 79 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 4,800 vehicles a day, roughly 7% of them trucks, projected to reach 8,467 by 2043. The structure is 112 ft (34.1 m) long and 34 ft wide. If it were closed, the detour would be 67.7 mi (109 km).

Location

Open in Google Maps
CarriesState Route 175
CrossesDooley Creek
Location01-MEN-175-0.82
RouteState Highway 175
CountyMendocino County
StateCalifornia
Coordinates38.97344, -123.10221
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length112 ft (34.1 m)
Longest span22 ft (6.7 m)
Deck width34 ft (10.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2009)
Projected traffic8,467 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed67.7 mi (109 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 175 over Dooley Creek built?

It was built in 1946, making it 79 years old in 2025.

What condition is State Route 175 over Dooley 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 May 2023.

How much traffic does State Route 175 over Dooley Creek carry?

About 4,800 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is State Route 175 over Dooley Creek?

The structure is 112 ft (34.1 m) long with a longest span of 22 ft (6.7 m) and a deck 34 ft wide.

Who owns State Route 175 over Dooley Creek?

It is owned by the State Highway Agency.