US Bridges

State Route 29 over Hill Creek

Good

Lake County, California · 01-LAK-029-R36.56 · Structure no. 14 0066

Built
1966
59 years old
Condition
Good
inspected October 2022
Type
Culvert
Concrete Continuous
Length
29 ft
3 main spans
Daily traffic
12,100
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 29 over Hill Creek is a concrete continuous culvert carrying State Route 29 over Hill Creek in Lake County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,100 vehicles a day, roughly 6% of them trucks, projected to reach 19,552 by 2042. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesState Route 29
CrossesHill Creek
Location01-LAK-029-R36.56
RouteState Highway 29
Coordinates38.98605, -122.86128
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,100 (2009)
Projected traffic19,552 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Hill Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is State Route 29 over Hill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

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

About 12,100 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 29 over Hill Creek?

The structure is 29 ft (8.8 m) long with a longest span of 9 ft (2.7 m).

Who owns State Route 29 over Hill Creek?

It is owned by the State Highway Agency.