US Bridges

Orangewood Road over North Fork Kopta Slough

Fair

Tehama County, California · 0.7 MI E of CR 99W · Structure no. 08C0343

Built
1984
41 years old
Condition
Fair
inspected November 2022
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
489
2008 count
Owner
County
County Highway Agency

About this bridge

Orangewood Road over North Fork Kopta Slough is a concrete continuous culvert carrying Orangewood Road over North Fork Kopta Slough in Tehama County, California. It was built in 1984, so it is 41 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 489 vehicles a day, roughly 7% of them trucks, projected to reach 512 by 2042. The structure is 26 ft (7.9 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesOrangewood Road
CrossesNorth Fork Kopta Slough
Location0.7 MI E of CR 99W
RouteCounty Highway 0
CountyTehama County
StateCalifornia
Coordinates39.96078, -122.16455
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span13 ft (4 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic489 (2008)
Projected traffic512 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Orangewood Road over North Fork Kopta Slough built?

It was built in 1984, making it 41 years old in 2025.

What condition is Orangewood Road over North Fork 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 Orangewood Road over North Fork Kopta Slough carry?

About 489 vehicles per day (2008 count), of which roughly 7% are trucks.

How long is Orangewood Road over North Fork Kopta Slough?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (4 m) and a deck 29 ft wide.

Who owns Orangewood Road over North Fork Kopta Slough?

It is owned by the County Highway Agency.