US Bridges

Cecilville Road over Black Bear Creek

Fair

Siskiyou County, California · 10.1 MI N/W Cecilville · Structure no. 02C0169

Built
1940
85 years old, rebuilt 1991
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
120
2024 count
Owner
County
County Highway Agency

About this bridge

Cecilville Road over Black Bear Creek is a steel stringer/multi-beam or girder carrying Cecilville Road over Black Bear Creek in Siskiyou County, California. It was built in 1940 and reconstructed in 1991, so it is 85 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 6 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 120 vehicles a day, roughly 2% of them trucks, projected to reach 150 by 2044. The structure is 50 ft (15.2 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesCecilville Road
CrossesBlack Bear Creek
Location10.1 MI N/W Cecilville
RouteCounty Highway 0
Coordinates41.20411, -123.22478
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating32.2 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2024)
Projected traffic150 by 2044
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 Cecilville Road over Black Bear Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1991.

What condition is Cecilville Road over Black Bear 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 August 2023.

How much traffic does Cecilville Road over Black Bear Creek carry?

About 120 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Cecilville Road over Black Bear Creek?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 18 ft wide.

Who owns Cecilville Road over Black Bear Creek?

It is owned by the County Highway Agency.