US Bridges

Robinson Creek RD over Robinson Creek

Fair

Mendocino County, California · 3.00 MI N SH 253 · Structure no. 10C0147

Built
1956
69 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
168
2011 count
Owner
County
County Highway Agency

About this bridge

Robinson Creek RD over Robinson Creek is a prestressed concrete tee beam carrying Robinson Creek RD over Robinson 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 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 168 vehicles a day, roughly 5% of them trucks, projected to reach 218 by 2042. The structure is 43 ft (13.2 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRobinson Creek RD
CrossesRobinson Creek
Location3.00 MI N SH 253
RouteCounty Highway 0
Coordinates39.08966, -123.26086
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating97.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length43 ft (13.2 m)
Longest span41 ft (12.4 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic168 (2011)
Projected traffic218 by 2042
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Robinson Creek RD over Robinson Creek built?

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

What condition is Robinson Creek RD over Robinson 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 Robinson Creek RD over Robinson Creek carry?

About 168 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Robinson Creek RD over Robinson Creek?

The structure is 43 ft (13.2 m) long with a longest span of 41 ft (12.4 m) and a deck 16 ft wide.

Who owns Robinson Creek RD over Robinson Creek?

It is owned by the County Highway Agency.