Structure 304-0002 · Yuma County, AZ

Imperial Dam Road over Arizona Ggmc Sluiceway

Carries Imperial Dam Road over Arizona Ggmc Sluiceway, 7 Mi West Of US HWY 95.

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
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT184 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

184 ft end to end, longest span 46 ft: about 3 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.

Built1975rebuilt 2019
Length184.1 ft56.1 m
Daily traffic200counted 2017
Last inspectedOctober 2023every 48 months

Location

StateArizona
CountyYuma
Location7 Mi West Of US HWY 95
CarriesImperial Dam Road
CrossesArizona Ggmc Sluiceway
Coordinates32.87523, -114.46238

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length184.1 ft (56.1 m)
Max Span45.9 ft (14 m)
Deck Width33.1 ft (10.1 m)
Deck Area566.6 sq m
Main Spans4
Year Built1975 (reconstructed 2019)

Traffic

Avg Daily Traffic200 (2017)
Truck Traffic75%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 48 months
OwnerBureau of Reclamation
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0304-0002

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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