Structure 23C0100 · Solano County, CA

Alamo DR over Alamo Creek

Carries Alamo DR over Alamo Creek, 0.4 Mi N/w Of I-80.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

33 ft end to end. 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.

Built1955rebuilt 1978
Length33.1 ft10.1 m
Daily traffic9,073counted 2010
Last inspectedNovember 2023every 24 months

Location

StateCalifornia
CountySolano
Location0.4 Mi N/w Of I-80
CarriesAlamo DR
CrossesAlamo Creek
Coordinates38.35001, -122.00346

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length33.1 ft (10.1 m)
Max Span30.8 ft (9.4 m)
Deck Width63.0 ft (19.2 m)
Deck Area193.9 sq m
Main Spans1
Year Built1955 (reconstructed 1978)

Traffic

Avg Daily Traffic9,073 (2010)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number23C0100

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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