Custer County, ID

81 public highway bridges

Custer County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Custer County, Idaho contains 81 public highway bridges. Roughly 33.3% are rated “Good,” 56.8% “Fair,” and 9.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

81
Total Bridges
33.3%
Good
56.8%
Fair
9.9%
Poor Condition

Condition Distribution

Good
33.3% (27)
Fair
56.8% (46)
Poor
9.9% (8)

All Bridges (81)

FDR

Fair

Over: EAST FORK SALMON RIVER

22 MILES UP EAST FORK R., Custer, ID

Built 1989 ADT: 50

NO DATA ENTERED

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1972 Load: 8.4 t ADT: 50

NO DATA ENTERED

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1972 Load: 11.3 t ADT: 50

NO DATA ENTERED

Fair

Over: JORDAN CREEK

NO DATA ENTERED, Custer, ID

Built 1972 Load: 13.0 t ADT: 100

NO DATA ENTERED

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1972 Load: 14.9 t ADT: 50

HOUSTON ROAD

Fair

Over: BIG LOST RIVER

1.5 S. 1.5 E. MACKAY, Custer, ID

Built 1973 Load: 16.3 t ADT: 170

CUSTER MOTORWAY

Fair

Over: YANKEE FORK RIVER

NO DATA ENTERED, Custer, ID

Built 1961 Load: 16.5 t ADT: 100

FDR

Fair

Over: SALMON RIVER

7 MILES EAST STANLEY, Custer, ID

Built 1967 Load: 16.5 t ADT: 50

CUSTER MOTORWAY

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 2004 Load: 17.5 t ADT: 100

BEAVER CREEK ROAD

Fair

Over: BEAVER CREEK

NO DATA ENTERED, Custer, ID

Built 1953 Load: 18.8 t ADT: 50

FDR

Fair

Over: EAST FORK SALMON RIVER

28 MILES UP EAST FORK R., Custer, ID

Built 1960 Load: 19.1 t ADT: 50

FDR

Fair

Over: ALTURAS LAKE CREEK

12 MILES SOUTH OF STANLEY, Custer, ID

Built 1955 Load: 19.8 t ADT: 50

FDR

Fair

Over: SALMON RIVER

4 MILES NE OF STANLEY, Custer, ID

Built 1969 Load: 19.8 t ADT: 50

SAWMILL CANYON RD

Fair

Over: LITTLE LOST RIVER

40.5 MI. NNW OF HOWE ID, Custer, ID

Built 1957 Load: 20.1 t ADT: 40

BEAVER CREEK ROAD

Fair

Over: SEAFOAM CREEK

NO DATA ENTERED, Custer, ID

Built 1968 Load: 20.7 t ADT: 10

SQ___ CREEK ROAD

Fair

Over: PAASASIKWANA NAOKWAIDE

NO DATA ENTERED, Custer, ID

Built 1964 Load: 21.4 t ADT: 20

BEAVER-LOON ROAD

Fair

Over: LOON CREEK

NO DATA ENTERED, Custer, ID

Built 1957 Load: 21.7 t ADT: 10

SH 21

Fair

Over: CROOKED CREEK

3.1 W. STANLEY, Custer, ID

Built 1968 Load: 22.7 t ADT: 1,800

BEAVER CREEK ROAD

Fair

Over: MARSH CREEK

CROSSES MARSH CREEK, Custer, ID

Built 1964 Load: 22.7 t ADT: 50

TREALOR CREEK ROAD

Fair

Over: SQ___ CREEK

NO DATA ENTERED, Custer, ID

Built 1966 Load: 24.0 t ADT: 40

FDR

Fair

Over: FISHHOOK CREEK

REDFISH LAKE BEACH AREA, Custer, ID

Built 1956 Load: 24.0 t ADT: 50

FDR

Fair

Over: STANLEY LAKE CREEK

1/2 MILE EAST OF HWY 21, Custer, ID

Built 1969 Load: 24.0 t ADT: 50

SQ___ CREEK ROAD

Fair

Over: PAASASIKWANA NAOKWAIDE

NO DATA ENTERED, Custer, ID

Built 1964 Load: 24.3 t ADT: 20

KANE CREEK ROAD

Fair

Over: KANE CREEK

NO DATA ENTERED, Custer, ID

Built 1966 Load: 24.9 t ADT: 40

ROAD

Fair

Over: KNAPP CREEK

NO DATA ENTERED, Custer, ID

Built 1964 Load: 25.6 t ADT: 10

CUSTER MOTORWAY

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1973 Load: 25.9 t ADT: 100

THOMPSON CR ROAD

Fair

Over: THOMPSON CREEK

NO DATA ENTERED, Custer, ID

Built 1982 Load: 25.9 t ADT: 40

BEAVER-LOON ROAD

Fair

Over: BEAVER CREEK

NO DATA ENTERED, Custer, ID

Built 1972 Load: 25.9 t ADT: 5

FDR

Fair

Over: GERMANIA CEEEK

25 UP EAST FORK SALMON R., Custer, ID

Built 1956 Load: 25.9 t ADT: 50

BEAVER-LOON ROAD

Fair

Over: BEAVER CREEK

NO DATA ENTERED, Custer, ID

Built 1967 Load: 26.2 t ADT: 10

BEAVER-LOON ROAD

Fair

Over: NELSON CREEK

19 MILES NORTH OF SUNBEAM, Custer, ID

Built 1967 Load: 26.2 t ADT: 10

BULL CREEK ROAD

Fair

Over: LITTLE LOST RIVER

NO DATA ENTERED, Custer, ID

Built 1971 Load: 26.2 t ADT: 10

CUSTER MOTORWAY

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1969 Load: 26.6 t ADT: 100

BASIN CREEK ROAD

Fair

Over: EAST FORK BASIN CREEK

NO DATA ENTERED, Custer, ID

Built 1979 Load: 26.6 t ADT: 40

COPPER BASIN LOOP

Fair

Over: STAR HOPE CREEK

21.0 E. SUN VALLEY, Custer, ID

Built 1970 Load: 27.2 t ADT: 20

BEAVER-LOON ROAD

Fair

Over: W.FK MAYFIELD CREEK

19 MILES N OF SUNBEAM, Custer, ID

Built 1968 Load: 27.2 t ADT: 10

BEAVER CREEK ROAD

Fair

Over: FLOAT CREEK

NO DATA ENTERED, Custer, ID

Built 1967 Load: 28.2 t ADT: 10

CORRAL CANYON ROAD

Fair

Over: N. FK. BIG LOST RIVER

NO DATA ENTERED, Custer, ID

Built 1979 Load: 28.5 t ADT: 40

CUSTER MOTORWAY

Fair

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1962 Load: 29.2 t ADT: 100

BEAVER-LOON ROAD

Fair

Over: W.FK. MAYFIELD CREEK

NO DATA ENTERED, Custer, ID

Built 1968 Load: 29.2 t ADT: 10

BEAVER-LOON ROAD

Fair

Over: W. FK. MAYFIELD CREEK

NO DATA ENTERED, Custer, ID

Built 1967 Load: 29.2 t ADT: 10

FDR

Fair

Over: SALMON RIVER

1 MILE WEST SVWC SNRA, Custer, ID

Built 1960 Load: 29.2 t ADT: 50

SH 75

Fair

Over: REDFISH LAKE CREEK

5.6 S. STANLEY, Custer, ID

Built 1960 Load: 31.8 t ADT: 1,100

FDR

Fair

Over: PETTIT LAKE CREEK

PETTIT LAKE, Custer, ID

Built 1982 Load: 35.3 t ADT: 50

FDR

Fair

Over: HELL ROARING CREEK

2 MILES WEST SVWC, Custer, ID

Built 1984 Load: 43.1 t ADT: 50

BEAVER-LOON ROAD

Fair

Over: JORDAN CREEK

NO DATA ENTERED, Custer, ID

Built 2001 Load: 43.4 t ADT: 100

FDR

Good

Over: EAST FORK SALMON RIVER

20 MILES FROM MOUTH OF R., Custer, ID

Built 1989 ADT: 50

FDR

Good

Over: EAST FORK SALMON RIVER

BOWERY GUARD STATION, Custer, ID

Built 1991 ADT: 50

FDR

Good

Over: HUCKELBERRY CREEK

3 MILES WEST SESSIONS LOE, Custer, ID

Built 1984 ADT: 50

FDR

Good

Over: VALLEY CREEK

NORTH MP120.7 ST HWY 21, Custer, ID

Built 1986 ADT: 60

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.