Structure 33C0017 · Alameda County, CA

Old Canyon RD over Alameda Creek

Carries Old Canyon RD over Alameda Creek, 0.08 Mi East Of ST RTE 84.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT299 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 8/9

299 ft end to end, longest span 46 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck 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 tee-beam bridge.

Built194878 years old
Length298.9 ft91.1 m
Daily traffic2,700counted 2010
Last inspectedSeptember 2024every 24 months

Location

StateCalifornia
CountyAlameda
Location0.08 Mi East Of ST RTE 84
CarriesOld Canyon RD
CrossesAlameda Creek
Coordinates37.57818, -121.96898

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length298.9 ft (91.1 m)
Max Span45.6 ft (13.9 m)
Deck Width31.8 ft (9.7 m)
Deck Area883.7 sq m
Main Spans8
Year Built1948

Traffic

Avg Daily Traffic2,700 (2010)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number33C0017

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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