Structure 28C0462L · Contra Costa County, CA

Richmond Parkway over Wild Cat Creek

Carries Richmond Parkway over Wild Cat Creek, 0.6 Mi S Parr BLVD.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT92 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

92 ft end to end, longest span 30 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 slab bridge.

Built1989rebuilt 1994
Length91.9 ft28 m
Daily traffic15,759counted 2015
Last inspectedSeptember 2024every 48 months

Location

StateCalifornia
CountyContra Costa
Location0.6 Mi S Parr BLVD
CarriesRichmond Parkway
CrossesWild Cat Creek
Coordinates37.95801, -122.37363

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length91.9 ft (28 m)
Max Span29.9 ft (9.1 m)
Deck Width52.5 ft (16 m)
Deck Area448 sq m
Main Spans3
Year Built1989 (reconstructed 1994)

Traffic

Avg Daily Traffic15,759 (2015)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number28C0462L

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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