Structure 18 0009 · Sutter County, CA

State Route 20 over Feather River K ST Up Rr

Carries State Route 20 over Feather River K ST Up Rr, 03-sut-020-17.00-yc.

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 overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,674 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

2,674 ft end to end, longest span 161 ft: about 7.4 football fields. 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 girder bridge.

Built194779 years old
Length2673.9 ft815 m
Daily traffic48,000counted 2012
Last inspectedSeptember 2023every 24 months

Location

StateCalifornia
CountySutter
Location03-sut-020-17.00-yc
CarriesState Route 20
CrossesFeather River K ST Up Rr
Coordinates39.14321, -121.60931

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length2673.9 ft (815 m)
Max Span160.8 ft (49 m)
Deck Width67.9 ft (20.7 m)
Deck Area16870.5 sq m
Main Spans24
Year Built1947

Traffic

Avg Daily Traffic48,000 (2012)
Truck Traffic5%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number18 0009

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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