Structure 17765 · Custer County, ID

SH 75 over Redfish Lake Creek

Carries SH 75 over Redfish Lake Creek, 5.6 S. Stanley.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT130 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

130 ft end to end, longest span 50 ft. 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 tee-beam bridge.

Built196066 years old
Length129.9 ft39.6 m
Daily traffic1,100counted 2023
Last inspectedJuly 2024every 48 months

Location

StateIdaho
CountyCuster
Location5.6 S. Stanley
CarriesSH 75
CrossesRedfish Lake Creek
Coordinates44.16839, -114.89953

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length129.9 ft (39.6 m)
Max Span49.9 ft (15.2 m)
Deck Width32.2 ft (9.8 m)
Deck Area388.1 sq m
Main Spans3
Year Built1960

Traffic

Avg Daily Traffic1,100 (2023)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000017765

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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