US Bridges

State Route 29 over Putah Creek

Good

Lake County, California · 01-LAK-029-9.74 · Structure no. 14 0014

Built
2003
22 years old
Condition
Good
inspected October 2022
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
384 ft
5 main spans
Daily traffic
10,900
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 29 over Putah Creek is a concrete continuous box beam or girders - multiple carrying State Route 29 over Putah Creek in Lake County, California. It was built in 2003, so it is 22 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 10,900 vehicles a day, roughly 6% of them trucks, projected to reach 19,446 by 2042. The structure is 384 ft (117 m) long and 55 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesState Route 29
CrossesPutah Creek
Location01-LAK-029-9.74
RouteState Highway 29
Coordinates38.79034, -122.56648
Functional classRural Minor 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.
Channel and channel protection8 Very GoodNo problems noted.
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
Deck geometry6: Equal to 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

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length384 ft (117 m)
Longest span82 ft (25 m)
Deck width55 ft (16.7 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,900 (2009)
Projected traffic19,446 by 2042
Trucks6%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

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 Putah Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is State Route 29 over Putah 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 Putah Creek carry?

About 10,900 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 29 over Putah Creek?

The structure is 384 ft (117 m) long with a longest span of 82 ft (25 m) and a deck 55 ft wide.

Who owns State Route 29 over Putah Creek?

It is owned by the State Highway Agency.