Structure 28C0087 · Contra Costa County, CA

Sycamore Vly RD over San Ramon Creek

Carries Sycamore Vly RD over San Ramon Creek, 0.5 Mi E Of SH 680.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
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 FT77 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

77 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 multi-beam bridge.

Built1965rebuilt 1988
Length77.1 ft23.5 m
Daily traffic28,237counted 2020
Last inspectedMarch 2022every 48 months

Location

StateCalifornia
CountyContra Costa
Location0.5 Mi E Of SH 680
CarriesSycamore Vly RD
CrossesSan Ramon Creek
Coordinates37.81124, -121.98454

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length77.1 ft (23.5 m)
Max Span75.1 ft (22.9 m)
Deck Width91.9 ft (28 m)
Deck Area658 sq m
Main Spans1
Year Built1965 (reconstructed 1988)

Traffic

Avg Daily Traffic28,237 (2020)
Truck Traffic6%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2022
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number28C0087

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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