Structure 33 0752S · Alameda County, CA

Interstate 880 over 29 TH Avenue

Carries Interstate 880 over 29 TH Avenue, 04-ala-880-28.69.

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
SEMI-TRUCK · 72 FT152 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

152 ft end to end, longest span 76 ft: about 2 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 box-beam bridge.

Built20206 years old
Length152.2 ft46.4 m
Daily traffic11,300counted 1998
Last inspectedFebruary 2025every 24 months

Location

StateCalifornia
CountyAlameda
Location04-ala-880-28.69
CarriesInterstate 880
Crosses29 TH Avenue
Coordinates37.77497, -122.23226

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length152.2 ft (46.4 m)
Max Span75.8 ft (23.1 m)
Deck Width50.9 ft (15.5 m)
Deck Area719.2 sq m
Main Spans2
Year Built2020

Traffic

Avg Daily Traffic11,300 (1998)
Truck Traffic2%
Lanes On Bridge3
Lanes Under Bridge1

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number33 0752S

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.

Nearby Bridges