US Bridges

Big Canyon RD over Big Canyon Creek

Fair

Lake County, California · 8 MI North of SR 29 · Structure no. 14C0116

Built
1930
95 years old, rebuilt 1995
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
208
2008 count
Owner
County
County Highway Agency

About this bridge

Big Canyon RD over Big Canyon Creek is a steel stringer/multi-beam or girder carrying Big Canyon RD over Big Canyon Creek in Lake County, California. It was built in 1930 and reconstructed in 1995, so it is 95 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 208 vehicles a day, roughly 5% of them trucks, projected to reach 276 by 2044. The structure is 41 ft (12.6 m) long and 26 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesBig Canyon RD
CrossesBig Canyon Creek
Location8 MI North of SR 29
RouteCounty Highway 0
Coordinates38.83964, -122.6554
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating35.4 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length41 ft (12.6 m)
Longest span39 ft (12 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic208 (2008)
Projected traffic276 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Big Canyon RD over Big Canyon Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1995.

What condition is Big Canyon RD over Big Canyon 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 Big Canyon Creek carry?

About 208 vehicles per day (2008 count), of which roughly 5% are trucks.

How long is Big Canyon RD over Big Canyon Creek?

The structure is 41 ft (12.6 m) long with a longest span of 39 ft (12 m) and a deck 26 ft wide.

Who owns Big Canyon RD over Big Canyon Creek?

It is owned by the County Highway Agency.