US Bridges

State Route 70 EB over Feather River

Fair

Butte County, California · 03-BUT-070-14.83-OVL · Structure no. 12 0141R

Built
1963
62 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
510 ft
4 main spans
Daily traffic
10,050
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 70 EB over Feather River is a steel stringer/multi-beam or girder carrying State Route 70 EB over Feather River in Butte County, California. It was built in 1963, so it is 62 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 5 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 10,050 vehicles a day, roughly 15% of them trucks, projected to reach 12,177 by 2041. The structure is 510 ft (155.4 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesState Route 70 EB
CrossesFeather River
Location03-BUT-070-14.83-OVL
RouteState Highway 70
CountyButte County
StateCalifornia
Coordinates39.51114, -121.57252
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.5 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length510 ft (155.4 m)
Longest span126 ft (38.4 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,050 (2020)
Projected traffic12,177 by 2041
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 70 EB over Feather River built?

It was built in 1963, making it 62 years old in 2025.

What condition is State Route 70 EB over Feather River 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 State Route 70 EB over Feather River carry?

About 10,050 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is State Route 70 EB over Feather River?

The structure is 510 ft (155.4 m) long with a longest span of 126 ft (38.4 m) and a deck 34 ft wide.

Who owns State Route 70 EB over Feather River?

It is owned by the State Highway Agency.