US Bridges

Blarsden Gragle RD over Middle Fork Feather Riv

Fair

Plumas County, California · 0.5 MI North of S.H.89 · Structure no. 09C0134

Built
1910
115 years old, rebuilt 1965
Condition
Fair
inspected October 2023
Type
Truss - Thru
Steel
Length
265 ft
1 main span
Daily traffic
370
2019 count
Owner
County
County Highway Agency

About this bridge

Blarsden Gragle RD over Middle Fork Feather Riv is a steel truss - thru carrying Blarsden Gragle RD over Middle Fork Feather Riv in Plumas County, California. It was built in 1910 and reconstructed in 1965, so it is 115 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 370 vehicles a day, roughly 3% of them trucks, projected to reach 320 by 2044. The structure is 265 ft (80.8 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBlarsden Gragle RD
CrossesMiddle Fork Feather Riv
Location0.5 MI North of S.H.89
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates39.77279, -120.61179
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating18.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1 (+8 approach)
Design loadUnknown
Structure length265 ft (80.8 m)
Longest span114 ft (34.7 m)
Deck width18 ft (5.5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic370 (2019)
Projected traffic320 by 2044
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Blarsden Gragle RD over Middle Fork Feather Riv built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1965.

What condition is Blarsden Gragle RD over Middle Fork Feather Riv 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 October 2023.

How much traffic does Blarsden Gragle RD over Middle Fork Feather Riv carry?

About 370 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Blarsden Gragle RD over Middle Fork Feather Riv?

The structure is 265 ft (80.8 m) long with a longest span of 114 ft (34.7 m) and a deck 18 ft wide.

Who owns Blarsden Gragle RD over Middle Fork Feather Riv?

It is owned by the County Highway Agency.