Structure 27835 · Elmore County, ID

S3837;strk Dam Ctf over Middle Line Canal

Carries S3837;strk Dam Ctf over Middle Line Canal, At Strike Dam.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT25 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

25 ft end to end. 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.

Built1959rebuilt 2021
Length25.3 ft7.7 m
Daily traffic350counted 2023
Last inspectedFebruary 2023every 48 months

Location

StateIdaho
CountyElmore
LocationAt Strike Dam
CarriesS3837;strk Dam Ctf
CrossesMiddle Line Canal
Coordinates42.95056, -115.97575

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length25.3 ft (7.7 m)
Max Span24.3 ft (7.4 m)
Deck Width35.4 ft (10.8 m)
Deck Area83.2 sq m
Main Spans1
Year Built1959 (reconstructed 2021)

Traffic

Avg Daily Traffic350 (2023)
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 48 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000027835

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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