US Bridges

Big Canyon RD over Putah Creek

Fair

Lake County, California · 0.5 MI N of SR 175 · Structure no. 14C0010

Built
1961
64 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
265 ft
5 main spans
Daily traffic
820
2011 count
Owner
County
County Highway Agency

About this bridge

Big Canyon RD over Putah Creek is a concrete continuous tee beam carrying Big Canyon RD over Putah Creek in Lake County, California. It was built in 1961, so it is 64 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 5 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 820 vehicles a day, roughly 2% of them trucks, projected to reach 1,149 by 2042. The structure is 265 ft (80.7 m) long and 33 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesBig Canyon RD
CrossesPutah Creek
Location0.5 MI N of SR 175
RouteCounty Highway 0
CountyLake County
StateCalifornia
Coordinates38.75977, -122.6152
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating56.1 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length265 ft (80.7 m)
Longest span58 ft (17.7 m)
Deck width33 ft (10 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic820 (2011)
Projected traffic1,149 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Big Canyon RD over Putah Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Big Canyon RD over Putah 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 March 2024.

How much traffic does Big Canyon RD over Putah Creek carry?

About 820 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Big Canyon RD over Putah Creek?

The structure is 265 ft (80.7 m) long with a longest span of 58 ft (17.7 m) and a deck 33 ft wide.

Who owns Big Canyon RD over Putah Creek?

It is owned by the County Highway Agency.