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

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

FDR

Poor

Over: VALLEY CREEK

6 MILES NW OF STANLEY, Custer, ID

Built 1950 Load: 24.0 t ADT: 50

SQUAW CREEK RD

Poor

Over: SQUAW CREEK

2.9 W. CLAYTON, Custer, ID

Built 1960 Load: 25.2 t ADT: 100

BEAVER-LOON ROAD

Poor

Over: JORDAN CREEK

NO DATA ENTERED, Custer, ID

Built 1993 Load: 32.7 t ADT: 100

EAST FORK RD

Poor

Over: ROAD CREEK

5.8 S 5.6 E CLAYTON, Custer, ID

Built 2022 Load: 33.0 t ADT: 90

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

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.