Structure 9 0016 · Plumas County, CA

State Route 70 over Chambers Creek

Carries State Route 70 over Chambers Creek, 02-plu-070-9.04.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT49 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

49 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built1959rebuilt 1994
Length48.6 ft14.8 m
Daily traffic1,345counted 2009
Last inspectedJune 2023every 48 months

Location

StateCalifornia
CountyPlumas
Location02-plu-070-9.04
CarriesState Route 70
CrossesChambers Creek
Coordinates39.95630, -121.29330

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length48.6 ft (14.8 m)
Max Span46.6 ft (14.2 m)
Deck Width59.4 ft (18.1 m)
Deck Area267.9 sq m
Main Spans1
Year Built1959 (reconstructed 1994)

Traffic

Avg Daily Traffic1,345 (2009)
Lanes On Bridge4

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number09 0016

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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