Structure 11C0065 · Glenn County, CA

Road 61 over Princeton Codora Canal

Carries Road 61 over Princeton Codora Canal, 0.05 Mi W Of S.h. 45.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
21 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

21 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built1930rebuilt 1979
Length21.0 ft6.4 m
Daily traffic967counted 2018
Last inspectedFebruary 2024every 24 months

Location

StateCalifornia
CountyGlenn
Location0.05 Mi W Of S.h. 45
CarriesRoad 61
CrossesPrinceton Codora Canal
Coordinates39.45728, -122.01760

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length21.0 ft (6.4 m)
Max Span20.0 ft (6.1 m)
Deck Width39.0 ft (11.9 m)
Deck Area76.2 sq m
Main Spans1
Year Built1930 (reconstructed 1979)

Traffic

Avg Daily Traffic967 (2018)
Truck Traffic30%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number11C0065

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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