US Bridges

State Route 70 over Spanish Creek

Fair

Plumas County, California · 02-PLU-070-35.32 · Structure no. 09 0077

Built
2012
13 years old
Condition
Fair
inspected June 2023
Type
Arch - Deck
Concrete Continuous
Length
630 ft
1 main span
Daily traffic
3,375
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 70 over Spanish Creek is a concrete continuous arch - deck carrying State Route 70 over Spanish Creek in Plumas County, California. It was built in 2012, so it is 13 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 3,375 vehicles a day, projected to reach 3,673 by 2040. The structure is 630 ft (192 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesState Route 70
CrossesSpanish Creek
Location02-PLU-070-35.32
RouteState Highway 70
CountyPlumas County
StateCalifornia
Coordinates40.0266, -120.96382
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 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 alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHL 93
Structure length630 ft (192 m)
Longest span381 ft (116 m)
Deck width43 ft (13.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,375 (2009)
Projected traffic3,673 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

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 Spanish Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is State Route 70 over Spanish 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 Spanish Creek carry?

About 3,375 vehicles per day (2009 count).

How long is State Route 70 over Spanish Creek?

The structure is 630 ft (192 m) long with a longest span of 381 ft (116 m) and a deck 43 ft wide.

Who owns State Route 70 over Spanish Creek?

It is owned by the State Highway Agency.