Structure 11C0194 · Glenn County, CA

Co RD #99w over Walker Creek

Carries Co RD #99w over Walker Creek, 0.9 Mi N Co RD #39.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT101 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

101 ft end to end, longest span 29 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 tee-beam bridge.

Built193690 years old
Length101.0 ft30.8 m
Daily traffic2,051counted 2011
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountyGlenn
Location0.9 Mi N Co RD #39
CarriesCo RD #99w
CrossesWalker Creek
Coordinates39.59478, -122.19444

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length101.0 ft (30.8 m)
Max Span28.9 ft (8.8 m)
Deck Width37.4 ft (11.4 m)
Deck Area351.1 sq m
Main Spans4
Year Built1936

Traffic

Avg Daily Traffic2,051 (2011)
Truck Traffic20%
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 Critical3 — Scour critical
Structure Number11C0194

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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