US Bridges

State Route 284 over Little Last Chance Creek

Fair

Plumas County, California · 02-PLU-284-5.60 · Structure no. 09 0070

Built
2000
25 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
164 ft
2 main spans
Daily traffic
640
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 284 over Little Last Chance Creek is a concrete continuous box beam or girders - multiple carrying State Route 284 over Little Last Chance Creek in Plumas County, California. It was built in 2000, so it is 25 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 640 vehicles a day, roughly 3% of them trucks, projected to reach 822 by 2040. The structure is 164 ft (50 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesState Route 284
CrossesLittle Last Chance Creek
Location02-PLU-284-5.60
RouteState Highway 284
Coordinates39.86721, -120.17054
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length164 ft (50 m)
Longest span81 ft (24.8 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic640 (2009)
Projected traffic822 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 284 over Little Last Chance Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is State Route 284 over Little Last Chance 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 284 over Little Last Chance Creek carry?

About 640 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is State Route 284 over Little Last Chance Creek?

The structure is 164 ft (50 m) long with a longest span of 81 ft (24.8 m) and a deck 35 ft wide.

Who owns State Route 284 over Little Last Chance Creek?

It is owned by the State Highway Agency.