Structure 11C0101 · Glenn County, CA

Co RD #45 over South Fork Willow Creek

Carries Co RD #45 over South Fork Willow Creek, 0.25 Mi W Of 99 W.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

40 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 multi-beam bridge.

Built196561 years old
Length40.0 ft12.2 m
Daily traffic27counted 2011
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountyGlenn
Location0.25 Mi W Of 99 W
CarriesCo RD #45
CrossesSouth Fork Willow Creek
Coordinates39.55331, -122.20017

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length40.0 ft (12.2 m)
Max Span38.1 ft (11.6 m)
Deck Width23.0 ft (7 m)
Deck Area85.4 sq m
Main Spans1
Year Built1965

Traffic

Avg Daily Traffic27 (2011)
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number11C0101

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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