Structure 28C0480 · Contra Costa County, CA

Pomo Street over Contra Costa Canal

Carries Pomo Street over Contra Costa Canal, 0.05 Mi S Riverside Drive.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Superstructuresets the rating5/9 · Fair
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 5/9 · sets the ratingSubstructure 8/9

40 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 deck arch.

Built198739 years old
Length40.0 ft12.2 m
Daily traffic956counted 2013
Last inspectedNovember 2024every 24 months

Location

StateCalifornia
CountyContra Costa
Location0.05 Mi S Riverside Drive
CarriesPomo Street
CrossesContra Costa Canal
Coordinates38.02783, -121.96744

Physical Characteristics

MaterialSteel
DesignArch - Deck
Total Length40.0 ft (12.2 m)
Max Span30.5 ft (9.3 m)
Deck Area134.2 sq m
Main Spans1
Year Built1987

Traffic

Avg Daily Traffic956 (2013)
Truck Traffic2%
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 Number28C0480

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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