US Bridges

State Route 29 over Robinson Creek

Fair

Lake County, California · 01-LAK-029-50.82 · Structure no. 14 0030

Built
1947
78 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
96 ft
5 main spans
Daily traffic
5,700
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 29 over Robinson Creek is a concrete continuous slab carrying State Route 29 over Robinson Creek in Lake County, California. It was built in 1947, so it is 78 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 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 5,700 vehicles a day, roughly 6% of them trucks, projected to reach 10,302 by 2042. The structure is 96 ft (29.3 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesState Route 29
CrossesRobinson Creek
Location01-LAK-029-50.82
RouteState Highway 29
Coordinates39.14052, -122.91232
Functional classRural Principal Arterial - Other

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length96 ft (29.3 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2009)
Projected traffic10,302 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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 29 over Robinson Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is State Route 29 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 October 2024.

How much traffic does State Route 29 over Robinson Creek carry?

About 5,700 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 29 over Robinson Creek?

The structure is 96 ft (29.3 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns State Route 29 over Robinson Creek?

It is owned by the State Highway Agency.