US Bridges

Pedan Road over Kopta Slough

Fair

Tehama County, California · 0.4 KM E. of Hall Road · Structure no. 08C0357

Built
1987
38 years old
Condition
Fair
inspected November 2022
Type
Culvert
Concrete Continuous
Length
35 ft
3 main spans
Daily traffic
50
2010 count
Owner
County
County Highway Agency

About this bridge

Pedan Road over Kopta Slough is a concrete continuous culvert carrying Pedan Road over Kopta Slough in Tehama County, California. It was built in 1987, so it is 38 years old, younger 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 76 by 2044. The structure is 35 ft (10.8 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesPedan Road
CrossesKopta Slough
Location0.4 KM E. of Hall Road
RouteCounty Highway 0
CountyTehama County
StateCalifornia
Coordinates39.94418, -122.11871
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length35 ft (10.8 m)
Longest span11 ft (3.4 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2010)
Projected traffic76 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Pedan Road over Kopta Slough built?

It was built in 1987, making it 38 years old in 2025.

What condition is Pedan Road over Kopta Slough 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 November 2022.

How much traffic does Pedan Road over Kopta Slough carry?

About 50 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is Pedan Road over Kopta Slough?

The structure is 35 ft (10.8 m) long with a longest span of 11 ft (3.4 m) and a deck 34 ft wide.

Who owns Pedan Road over Kopta Slough?

It is owned by the County Highway Agency.