Structure 34C0082 · San Francisco County, CA

Treasure Island RD over Sidehill

Carries Treasure Island RD over Sidehill, NE Of Shv #3.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT154 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

154 ft end to end, longest span 30 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 girder bridge.

Built193888 years old
Length154.2 ft47 m
Daily traffic1,500counted 2020
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountySan Francisco
LocationNE Of Shv #3
CarriesTreasure Island RD
CrossesSidehill
Coordinates37.80914, -122.36886

Physical Characteristics

MaterialConcrete Continuous
DesignGirder and Floorbeam
Total Length154.2 ft (47 m)
Max Span29.9 ft (9.1 m)
Deck Width23.0 ft (7 m)
Deck Area329 sq m
Main Spans5
Year Built1938

Traffic

Avg Daily Traffic1,500 (2020)
Truck Traffic3%
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number34C0082

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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