Structure 8C0286 · Tehama County, CA

Maria Road over Tehama-colusa Canal

Carries Maria Road over Tehama-colusa Canal, East Of Walnut Road.

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 FT83 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

83 ft end to end, longest span 41 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.

Built196858 years old
Length83.0 ft25.3 m
Daily traffic200counted 2007
Last inspectedNovember 2024every 24 months

Location

StateCalifornia
CountyTehama
LocationEast Of Walnut Road
CarriesMaria Road
CrossesTehama-colusa Canal
Coordinates39.98054, -122.13463

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length83.0 ft (25.3 m)
Max Span41.0 ft (12.5 m)
Deck Width31.5 ft (9.6 m)
Deck Area242.9 sq m
Main Spans2
Year Built1968

Traffic

Avg Daily Traffic200 (2007)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number08C0286

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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