Structure 23C0227 · Solano County, CA

Hilborn Road over Putah South Canal

Carries Hilborn Road over Putah South Canal, 1/2 Mi N Waterman Bl.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT107 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

107 ft end to end, longest span 40 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.

Built1978rebuilt 2000
Length107.0 ft32.6 m
Daily traffic6,546counted 2007
Last inspectedDecember 2023every 24 months

Location

StateCalifornia
CountySolano
Location1/2 Mi N Waterman Bl
CarriesHilborn Road
CrossesPutah South Canal
Coordinates38.27995, -122.05392

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length107.0 ft (32.6 m)
Max Span40.0 ft (12.2 m)
Deck Width78.1 ft (23.8 m)
Deck Area775.9 sq m
Main Spans3
Year Built1978 (reconstructed 2000)

Traffic

Avg Daily Traffic6,546 (2007)
Truck Traffic3%
Lanes On Bridge4

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number23C0227

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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