Structure 33C0026 · Alameda County, CA

High ST over Oakland Estuary

Carries High ST over Oakland Estuary, 0.4 Mi S/w Of I-880.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT505 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 4/9 · sets the rating

505 ft end to end, longest span 296 ft: about 7 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 bascule bridge (drawn closed).

Built193987 years old
Length505.2 ft154 m
Daily traffic19,900counted 2014
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountyAlameda
Location0.4 Mi S/w Of I-880
CarriesHigh ST
CrossesOakland Estuary
Coordinates37.76401, -122.22548

Physical Characteristics

MaterialSteel
DesignMovable - Bascule
Total Length505.2 ft (154 m)
Max Span295.9 ft (90.2 m)
Deck Width25.9 ft (7.9 m)
Deck Area1216.6 sq m
Main Spans3
Year Built1939

Traffic

Avg Daily Traffic19,900 (2014)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number33C0026

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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