Custer County, ID

81 public highway bridges

Custer County Bridge Snapshot

Custer County, Idaho contains 81 public highway bridges in the FHWA National Bridge Inventory. Roughly 33.3% are rated “Good,” 56.8% “Fair,” 9.9% “Poor,” and 9.9% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in ID are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

81
Total Bridges
33.3%
Good
9.9%
Poor
9.9%
Structurally Deficient

Condition Distribution

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

All Bridges (81)

FDR

Good

Over: IRON CREEK

1.2 MILES UP FROM HWY 21, Custer, ID

Built 2012 ADT: 50

NO DATA ENTERED

Good

Over: NO DATA ENTERED

NO DATA ENTERED, Custer, ID

Built 1972 Load: 13.9 t ADT: 100

1901: HERD CREEK

Good

Over: East Fork Salmon River

9 mi S of ID75, Custer, ID

Built 1964 Load: 18.8 t ADT: 25

FDR

Good

Over: BIG BOULDER CREEK

20 MILES UP EAST FORK S R, Custer, ID

Built 1980 Load: 19.1 t ADT: 50

FDR

Good

Over: FISHHOOK CREEK

REDFISH LAKE, Custer, ID

Built 1975 Load: 20.4 t ADT: 50

FDR

Good

Over: SLATE CREEK

1 MILE ABOVE SALMON R BR, Custer, ID

Built 1976 Load: 23.0 t ADT: 50

REDROCK LOOP

Good

Over: LITTLE LOST RIVER

NO DATA ENTERED, Custer, ID

Built 1966 Load: 24.6 t ADT: 10

CHALLIS CREEK RD

Good

Over: CHALLIS CREEK

3.8 N. 1.8 W. CHALLIS, Custer, ID

Built 1997 Load: 26.3 t ADT: 470

1920: DARLING CREE

Good

Over: West Fork Morgan Creek

6.5 mi NW of US93, Custer, ID

Built 1995 Load: 26.9 t ADT: 25

FDR

Good

Over: BIG CASINO CREEK

BIG CASINO CAMPGROUND, Custer, ID

Built 1969 Load: 28.2 t ADT: 80

OLD CHILLY RD

Good

Over: BIG LOST RIVER

9.6 N 12.7 W MACKAY, Custer, ID

Built 2023 Load: 29.5 t ADT: 40

1920: DARLING CREE

Good

Over: Challis Creek

0.3 mi N of Challis Cr Rd, Custer, ID

Built 1981 Load: 29.8 t ADT: 25

SANDS CANYON RD

Good

Over: LITTLE LOST RIVER

NO DATA ENTERED, Custer, ID

Built 1987 Load: 30.1 t ADT: 5

1979: OLD STAGE

Good

Over: Morgan Creek

5 mi N of US93, Custer, ID

Built 2004 Load: 30.5 t ADT: 25

STC6870;PAHSIMEROI

Good

Over: BIG CREEK FISH PASSAGE

9.0 S. 10.4 E. MAY, Custer, ID

Built 2014 Load: 33.4 t ADT: 30

FDR

Good

Over: REDFISH LAKE CREEK

REDFISH LAKE OUTLET, Custer, ID

Built 2015 Load: 33.7 t ADT: 500

3700 NORTH

Good

Over: BIG LOST RIVER

1.2 E. DARLINGTON, Custer, ID

Built 2010 Load: 38.1 t ADT: 50

HOOPER LANE

Good

Over: PAHSIMEROI RIVER

3.5 S 0.8 E MAY, Custer, ID

Built 2011 Load: 39.2 t ADT: 70

FDR

Good

Over: FOURTH OF JULY CREEK

5 MILES UP 4TH OF JULY RD, Custer, ID

Built 1992 Load: 39.2 t ADT: 100

US 93

Good

Over: SALMON RIVER;CHALLIS BR.

2.6 S. CHALLIS, Custer, ID

Built 1995 Load: 40.8 t ADT: 1,400

CUSTER ROAD

Good

Over: SULPHUR CREEK

3.8 S. 0.2 W. MAY, Custer, ID

Built 2012 Load: 40.8 t ADT: 100

3800 NORTH RD

Good

Over: BIG LOST RIVER

1.0 N. DARLINGTON, Custer, ID

Built 2007 Load: 41.7 t ADT: 30

STC6868;TRAIL CRK

Good

Over: N. FORK BIG LOST RIVER

20.5 N.E. SUN VALLEY, Custer, ID

Built 2016 Load: 45.4 t ADT: 290

CUSTER MOTORWAY

Poor

Over: YANKEE FORK

NO DATA ENTERED, Custer, ID

Built 1992 Load: 19.1 t ADT: 100

NO DATA ENTERED

Poor

Over: NO DATA ENTERED

NO DATA ENTERED, Custer, ID

Built 1972 Load: 19.1 t ADT: 50

BEAVER-LOON ROAD

Poor

Over: JORDAN CREEK

NO DATA ENTERED, Custer, ID

Built 1957 Load: 23.0 t ADT: 100

SQUAW CREEK RD

Poor

Over: SQUAW CREEK

2.9 W. CLAYTON, Custer, ID

Built 1960 Load: 25.2 t ADT: 100

OLD CHILLI ROAD

Poor

Over: THOUSAND SPRINGS CREEK

12.6 N. 13.2 W. MACKAY, Custer, ID

Built 1926 Load: 39.9 t ADT: 80

FDR

Structurally Deficient

Over: VALLEY CREEK

6 MILES NW OF STANLEY, Custer, ID

Built 1950 Load: 24.0 t ADT: 50

BEAVER-LOON ROAD

Structurally Deficient

Over: JORDAN CREEK

NO DATA ENTERED, Custer, ID

Built 1993 Load: 32.7 t ADT: 100

EAST FORK RD

Structurally Deficient

Over: ROAD CREEK

5.8 S 5.6 E CLAYTON, Custer, ID

Built 2022 Load: 33.0 t ADT: 90

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

Related

Browse all → | Rankings →
Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial