Structure 33 0117 · Alameda County, CA

SR 123 (san Pablo) over SR 123 (macarthur Blvd)

Carries SR 123 (san Pablo) over SR 123 (macarthur Blvd), 04-ala-123-0.22-emv.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

52 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 slab bridge.

Built193690 years old
Length51.8 ft15.8 m
Daily traffic24,350counted 2009
Last inspectedNovember 2022every 48 months

Location

StateCalifornia
CountyAlameda
Location04-ala-123-0.22-emv
CarriesSR 123 (san Pablo)
CrossesSR 123 (macarthur Blvd)
Coordinates37.82845, -122.27889

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length51.8 ft (15.8 m)
Max Span45.9 ft (14 m)
Deck Width198.5 ft (60.5 m)
Deck Area955.9 sq m
Main Spans1
Year Built1936

Traffic

Avg Daily Traffic24,350 (2009)
Truck Traffic1%
Lanes On Bridge9
Lanes Under Bridge3

Inspection & Ownership

Last InspectionNovember 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number33 0117

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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