Structure 32700 · Lemhi County, ID

Barracks Lane over Lemhi River

Carries Barracks Lane over Lemhi River, 4.2 S. 6.0 E. Salmon.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT94 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

94 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 through truss.

Built1930rebuilt 1987
Length94.2 ft28.7 m
Daily traffic60counted 2023
Last inspectedJuly 2024every 24 months

Location

StateIdaho
CountyLemhi
Location4.2 S. 6.0 E. Salmon
CarriesBarracks Lane
CrossesLemhi River
Coordinates45.11539, -113.77472

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length94.2 ft (28.7 m)
Max Span89.9 ft (27.4 m)
Deck Width22.6 ft (6.9 m)
Deck Area198.0 sq m
Main Spans1
Year Built1930 (reconstructed 1987)

Traffic

Avg Daily Traffic60 (2023)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000032700

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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