US Bridges

State Route 29 over Hill Road

Good

Lake County, California · 01-LAK-029-R46.68 · Structure no. 14 0071L

Built
1972
53 years old
Condition
Good
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
98 ft
1 main span
Daily traffic
6,725
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 29 over Hill Road is a prestressed concrete box beam or girders - multiple carrying State Route 29 over Hill Road in Lake County, California. It was built in 1972, so it is 53 years old, younger 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 6,725 vehicles a day, roughly 6% of them trucks, projected to reach 12,719 by 2042. The structure is 98 ft (29.9 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesState Route 29
CrossesHill Road
Location01-LAK-029-R46.68
RouteState Highway 29
Coordinates39.10259, -122.9126
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating38.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length98 ft (29.9 m)
Longest span96 ft (29.3 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,725 (2009)
Projected traffic12,719 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 29 over Hill Road built?

It was built in 1972, making it 53 years old in 2025.

What condition is State Route 29 over Hill Road 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 Road carry?

About 6,725 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 29 over Hill Road?

The structure is 98 ft (29.9 m) long with a longest span of 96 ft (29.3 m) and a deck 41 ft wide.

Who owns State Route 29 over Hill Road?

It is owned by the State Highway Agency.