Structure 25045 · Lincoln County, ID

370 South Road over Milner Gooding Canal

Carries 370 South Road over Milner Gooding Canal, 2.0 S. 0.3 E. Dietrich.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT95 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 5/9 · sets the rating

95 ft end to end, longest span 25 ft. Lengths and the car 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 multi-beam bridge.

Built1944rebuilt 1977
Length95.1 ft29 m
Daily traffic100counted 2023
Last inspectedMarch 2023every 24 months

Location

StateIdaho
CountyLincoln
Location2.0 S. 0.3 E. Dietrich
Carries370 South Road
CrossesMilner Gooding Canal
Coordinates42.87950, -114.26308

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length95.1 ft (29 m)
Max Span24.9 ft (7.6 m)
Deck Width26.9 ft (8.2 m)
Deck Area237.8 sq m
Main Spans4
Year Built1944 (reconstructed 1977)

Traffic

Avg Daily Traffic100 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number000000000025045

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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