Structure DAPAMCCON000452 · Contra Costa County, CA

Waterfront RD over Slough

Carries Waterfront RD over Slough, West Of T1/t2.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

38 ft end to end, longest span 19 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 multi-beam bridge.

Built194581 years old
Length38.4 ft11.7 m
Last inspectedOctober 2019every 24 months

Location

StateCalifornia
CountyContra Costa
LocationWest Of T1/t2
CarriesWaterfront RD
CrossesSlough
Coordinates38.04061, -122.04937

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length38.4 ft (11.7 m)
Max Span19.4 ft (5.9 m)
Deck Width26.2 ft (8 m)
Deck Area93.6 sq m
Main Spans2
Year Built1945

Traffic

Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2019
Inspection FrequencyEvery 24 months
OwnerArmy
Historical SignificanceBridge is not eligible for the National Register
Scour Critical6 — Scour calculated, stable
Structure NumberDAPAMCCON000452

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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