US Bridges

Grnvle Rnd Vly RD over North Canyon Creek

Fair

Plumas County, California · 0.8 MI S of SH 89 · Structure no. 09C0074

Built
1957
68 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
110
2019 count
Owner
County
County Highway Agency

About this bridge

Grnvle Rnd Vly RD over North Canyon Creek is a concrete slab carrying Grnvle Rnd Vly RD over North Canyon Creek in Plumas County, California. It was built in 1957, so it is 68 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 110 vehicles a day, roughly 3% of them trucks, projected to reach 365 by 2044. The structure is 31 ft (9.4 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesGrnvle Rnd Vly RD
CrossesNorth Canyon Creek
Location0.8 MI S of SH 89
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates40.13323, -120.95588
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.8 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2019)
Projected traffic365 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Grnvle Rnd Vly RD over North Canyon Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Grnvle Rnd Vly RD over North Canyon 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 September 2023.

How much traffic does Grnvle Rnd Vly RD over North Canyon Creek carry?

About 110 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Grnvle Rnd Vly RD over North Canyon Creek?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.

Who owns Grnvle Rnd Vly RD over North Canyon Creek?

It is owned by the County Highway Agency.