US Bridges

State Route 89 over Sulphur Creek

Good

Plumas County, California · 02-PLU-089-3.40 · Structure no. 09 0027

Built
2002
23 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
172 ft
1 main span
Daily traffic
1,015
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 89 over Sulphur Creek is a prestressed concrete box beam or girders - multiple carrying State Route 89 over Sulphur Creek in Plumas County, California. It was built in 2002, so it is 23 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 1,015 vehicles a day, roughly 17% of them trucks, projected to reach 2,040 by 2040. The structure is 172 ft (52.3 m) long and 43 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

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CarriesState Route 89
CrossesSulphur Creek
Location02-PLU-089-3.40
RouteState Highway 89
CountyPlumas County
StateCalifornia
Coordinates39.73311, -120.56623
Functional classRural Minor Arterial

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating45.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length172 ft (52.3 m)
Longest span169 ft (51.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,015 (2009)
Projected traffic2,040 by 2040
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 89 over Sulphur Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is State Route 89 over Sulphur Creek 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 June 2023.

How much traffic does State Route 89 over Sulphur Creek carry?

About 1,015 vehicles per day (2009 count), of which roughly 17% are trucks.

How long is State Route 89 over Sulphur Creek?

The structure is 172 ft (52.3 m) long with a longest span of 169 ft (51.4 m) and a deck 43 ft wide.

Who owns State Route 89 over Sulphur Creek?

It is owned by the State Highway Agency.