US Bridges

Hibbard Road over Rancheria Creek

Fair

Mendocino County, California · Adjacent to SR 128 · Structure no. 10C0131

Built
1987
38 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
91 ft
2 main spans
Daily traffic
126
2011 count
Owner
County
County Highway Agency

About this bridge

Hibbard Road over Rancheria Creek is a concrete continuous slab carrying Hibbard Road over Rancheria Creek in Mendocino County, California. It was built in 1987, so it is 38 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 6 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 126 vehicles a day, roughly 5% of them trucks, projected to reach 65 by 2042. The structure is 91 ft (27.6 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesHibbard Road
CrossesRancheria Creek
LocationAdjacent to SR 128
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates38.91365, -123.26429
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length91 ft (27.6 m)
Longest span45 ft (13.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic126 (2011)
Projected traffic65 by 2042
Trucks5%
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 Hibbard Road over Rancheria Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Hibbard Road 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 Hibbard Road over Rancheria Creek carry?

About 126 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Hibbard Road over Rancheria Creek?

The structure is 91 ft (27.6 m) long with a longest span of 45 ft (13.8 m) and a deck 25 ft wide.

Who owns Hibbard Road over Rancheria Creek?

It is owned by the County Highway Agency.