Structure 305-3004 · Mohave County, AZ

Davis Dam Road over Forebay Channel

Carries Davis Dam Road over Forebay Channel, 3.5 M N From Bullhead Az.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT543 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

543 ft end to end, longest span 210 ft: about 1.5 football fields. 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.

Built194977 years old
Length543.0 ft165.5 m
Daily traffic80counted 2012
Last inspectedOctober 2024every 24 months

Location

StateArizona
CountyMohave
Location3.5 M N From Bullhead Az
CarriesDavis Dam Road
CrossesForebay Channel
Coordinates35.19831, -114.56754

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length543.0 ft (165.5 m)
Max Span210.0 ft (64 m)
Deck Width40.4 ft (12.3 m)
Deck Area2035.7 sq m
Main Spans2
Year Built1949

Traffic

Avg Daily Traffic80 (2012)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerBureau of Reclamation
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0305-3004

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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