US Bridges

Lambert Lane over Robinson Creek

PoorPosted for load

Mendocino County, California · 0.1 MI W of SR 128 · Structure no. 10C0146

Built
1954
71 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
379
2014 count
Owner
County
County Highway Agency

About this bridge

Lambert Lane over Robinson Creek is a concrete slab carrying Lambert Lane over Robinson Creek in Mendocino County, California. It was built in 1954, so it is 71 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 379 vehicles a day, projected to reach 55 by 2042. The structure is 29 ft (8.8 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLambert Lane
CrossesRobinson Creek
Location0.1 MI W of SR 128
RouteCounty Highway 0
Coordinates39.00837, -123.36848
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; bridge has failed and is closed
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span27 ft (8.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic379 (2014)
Projected traffic55 by 2042
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$297,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lambert Lane over Robinson Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Lambert Lane over Robinson Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does Lambert Lane over Robinson Creek carry?

About 379 vehicles per day (2014 count).

How long is Lambert Lane over Robinson Creek?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.1 m) and a deck 26 ft wide.

Who owns Lambert Lane over Robinson Creek?

It is owned by the County Highway Agency.