Structure 12 0141L · Butte County, CA

State Route 70 WB over Feather River

Carries State Route 70 WB over Feather River, 03-but-070-14.83-ovl.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT510 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

510 ft end to end, longest span 126 ft: about 7 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built196363 years old
Length509.8 ft155.4 m
Daily traffic10,050counted 2020
Last inspectedAugust 2023every 24 months

Location

StateCalifornia
CountyButte
Location03-but-070-14.83-ovl
CarriesState Route 70 WB
CrossesFeather River
Coordinates39.51109, -121.57270

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length509.8 ft (155.4 m)
Max Span126.0 ft (38.4 m)
Deck Width34.1 ft (10.4 m)
Deck Area1616.2 sq m
Main Spans4
Year Built1963

Traffic

Avg Daily Traffic10,050 (2020)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number12 0141L

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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