US Bridges

Big Canyon Road over Big Canyon Creek

Poor

Lake County, California · 8 1/4 MI N of SR 175 · Structure no. 14C0115

Built
1930
95 years old, rebuilt 1993
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
304
2008 count
Owner
County
County Highway Agency

About this bridge

Big Canyon Road over Big Canyon Creek is a steel stringer/multi-beam or girder carrying Big Canyon Road over Big Canyon Creek in Lake County, California. It was built in 1930 and reconstructed in 1993, 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 poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, temporary structure in place while original is closed.

It carries about 304 vehicles a day, roughly 2% of them trucks, projected to reach 439 by 2044. The structure is 25 ft (7.5 m) long and 25 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesBig Canyon Road
CrossesBig Canyon Creek
Location8 1/4 MI N of SR 175
RouteCounty Highway 0
Coordinates38.8462, -122.66418
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, temporary structure in place while original is closed
ScourScour critical; bridge has failed and is closed
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length25 ft (7.5 m)
Longest span23 ft (6.9 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic304 (2008)
Projected traffic439 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$220,000 (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Big Canyon Road over Big Canyon Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1993.

What condition is Big Canyon Road over Big Canyon Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Big Canyon Road over Big Canyon Creek carry?

About 304 vehicles per day (2008 count), of which roughly 2% are trucks.

How long is Big Canyon Road over Big Canyon Creek?

The structure is 25 ft (7.5 m) long with a longest span of 23 ft (6.9 m) and a deck 25 ft wide.

Who owns Big Canyon Road over Big Canyon Creek?

It is owned by the County Highway Agency.