US Bridges

State Route 70 over Indian Creek

Fair

Plumas County, California · 02-PLU-070-33.07 · Structure no. 09 0014

Built
1954
71 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
249 ft
4 main spans
Daily traffic
3,375
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 70 over Indian Creek is a steel stringer/multi-beam or girder carrying State Route 70 over Indian Creek in Plumas County, California. It was built in 1954, so it is 71 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 3,375 vehicles a day, roughly 10% of them trucks, projected to reach 3,673 by 2040. The structure is 249 ft (75.9 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesState Route 70
CrossesIndian Creek
Location02-PLU-070-33.07
RouteState Highway 70
CountyPlumas County
StateCalifornia
Coordinates40.03898, -120.98336
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length249 ft (75.9 m)
Longest span80 ft (24.4 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,375 (2009)
Projected traffic3,673 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

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 over Indian Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is State Route 70 over Indian 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 June 2023.

How much traffic does State Route 70 over Indian Creek carry?

About 3,375 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is State Route 70 over Indian Creek?

The structure is 249 ft (75.9 m) long with a longest span of 80 ft (24.4 m) and a deck 32 ft wide.

Who owns State Route 70 over Indian Creek?

It is owned by the State Highway Agency.