Structure 33 0236 · Alameda County, CA

Tennyson Road over Interstate 880

Carries Tennyson Road over Interstate 880, 04-ala-880-15.65-hay.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT290 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

290 ft end to end, longest span 95 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.

Built195868 years old
Length290.0 ft88.4 m
Daily traffic41,900counted 2016
Last inspectedMay 2024every 24 months

Location

StateCalifornia
CountyAlameda
Location04-ala-880-15.65-hay
CarriesTennyson Road
CrossesInterstate 880
Coordinates37.63146, -122.08481

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length290.0 ft (88.4 m)
Max Span95.1 ft (29 m)
Deck Width62.3 ft (19 m)
Deck Area1679.6 sq m
Main Spans4
Year Built1958

Traffic

Avg Daily Traffic41,900 (2016)
Truck Traffic3%
Lanes On Bridge4
Lanes Under Bridge10

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number33 0236

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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