US Bridges

County Road 70 over Pit River

Good

Modoc County, California · .8 MI N of Centerville RD · Structure no. 03C0120

Built
1997
28 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
185
2017 count
Owner
County
County Highway Agency

About this bridge

County Road 70 over Pit River is a concrete continuous slab carrying County Road 70 over Pit River in Modoc County, California. It was built in 1997, so it is 28 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 185 vehicles a day, roughly 2% of them trucks, projected to reach 269 by 2041. The structure is 102 ft (31.2 m) long and 25 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCounty Road 70
CrossesPit River
Location.8 MI N of Centerville RD
RouteCounty Highway 0
CountyModoc County
StateCalifornia
Coordinates41.43001, -120.73639
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length102 ft (31.2 m)
Longest span40 ft (12.2 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic185 (2017)
Projected traffic269 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 County Road 70 over Pit River built?

It was built in 1997, making it 28 years old in 2025.

What condition is County Road 70 over Pit River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does County Road 70 over Pit River carry?

About 185 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is County Road 70 over Pit River?

The structure is 102 ft (31.2 m) long with a longest span of 40 ft (12.2 m) and a deck 25 ft wide.

Who owns County Road 70 over Pit River?

It is owned by the County Highway Agency.