Structure 11C0269 · Glenn County, CA

County Road 39 over Wilson Creek

Carries County Road 39 over Wilson Creek, 0.75 Mi East Of CR D.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT58 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

58 ft end to end, longest span 18 ft. 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.

Built1950rebuilt 1970
Length58.1 ft17.7 m
Daily traffic491counted 2011
Last inspectedAugust 2024every 24 months

Location

StateCalifornia
CountyGlenn
Location0.75 Mi East Of CR D
CarriesCounty Road 39
CrossesWilson Creek
Coordinates39.58234, -122.23570

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length58.1 ft (17.7 m)
Max Span18.0 ft (5.5 m)
Deck Width32.8 ft (10 m)
Deck Area177 sq m
Main Spans3
Year Built1950 (reconstructed 1970)

Traffic

Avg Daily Traffic491 (2011)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number11C0269

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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