Boise County, ID

41 public highway bridges

Boise County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Boise County, Idaho contains 41 public highway bridges. Roughly 63.4% are rated “Good,” 29.3% “Fair,” and 7.3% “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.

41
Total Bridges
63.4%
Good
29.3%
Fair
7.3%
Poor Condition

Condition Distribution

Good
63.4% (26)
Fair
29.3% (12)
Poor
7.3% (3)

All Bridges (41)

PINE CREEK ROAD

Fair

Over: GRIMES CREEK

9.5 MI S.W. OF ID CITY, Boise, ID

Built 1947 ADT: 25

LIGHTENING CR RD

Fair

Over: M. FK. PAYETTE

8 MI NORTH OF CROUCH ID, Boise, ID

Built 1964 Load: 17.5 t ADT: 50

OKEEFE CREEK ROAD

Fair

Over: CLEAR CREEK

6.5 MI NNE OF LOWMAN, ID, Boise, ID

Built 1966 Load: 18.8 t ADT: 10

CAMPGRD. ACCESS

Fair

Over: SOUTH FORK PAYETTE RIVER

KIRKHAM HOT SPRINGS CG., Boise, ID

Built 1966 Load: 19.1 t ADT: 60

ARCHIE CK. ROAD

Fair

Over: SOUTH FORK PAYETTE RIVER

5 MI EAST OF LOWMAN IDAHO, Boise, ID

Built 1962 Load: 20.1 t ADT: 40

WILLIS FLAT ROAD

Fair

Over: SO.FK.PAYETTE RIVER

14 MI EAST OF LOWMAN, ID, Boise, ID

Built 1959 Load: 22.0 t ADT: 35

SMA 3824;BNKS LWMN

Fair

Over: DEADWOOD RIVER

22.1 E. CROUCH, Boise, ID

Built 1985 Load: 22.7 t ADT: 660

FIVE MILE ROAD

Fair

Over: FIVE MILE CREEK

1 MI N.E. OF HELENDE C.G., Boise, ID

Built 1981 Load: 24.6 t ADT: 10

SMITH CREEK ROAD

Fair

Over: M.FK.PAYETTE R;R.SMITH C

3.2 N. 0.2 E. CROUCH, Boise, ID

Built 1973 Load: 26.1 t ADT: 25

STC 3883;ROBIE CRK

Fair

Over: MORES CREEK

13.6 S. 8.1 W. IDAHO CITY, Boise, ID

Built 1997 Load: 27.2 t ADT: 300

N.FK. BOISE R. RD.

Fair

Over: NORTH FORK BOISE RIVER

(DEER PARK BRIDGE), Boise, ID

Built 1949 Load: 32.4 t ADT: 59

SPUR 348J

Fair

Over: PIKES FORK CREEK

NEAR NFSR 312/348J JUNCT, Boise, ID

Built 1985 Load: 32.7 t ADT: 10

NO DATA ENTERED

Good

Over: ROARING RIVER

NO DATA ENTERED, Boise, ID

Built 2007 ADT: 50

NO DATA ENTERED

Good

Over: SCRIVER CREEK

NO DATA ENTERED, Boise, ID

Built 2022 ADT: 50

TRAPPER CK. ROAD

Good

Over: NORTH FORK BOISE RIVER

2.5 MI SW OF DEER PARK, Boise, ID

Built 1977 Load: 12.3 t ADT: 10

EDNA CK.-L.OWL RD.

Good

Over: CROOKED RIVER

8 MI EAST OF PILOT PEAK, Boise, ID

Built 1976 Load: 12.6 t ADT: 150

PRIVATE ROAD

Good

Over: MORES CREEK

6.2 S. 5.2 W. IDAHO CITY, Boise, ID

Built 1985 Load: 14.5 t ADT: 15

N.FK. BOISE R. RD.

Good

Over: MORES CREEK

2 MI EAST OF IDAHO CITY, Boise, ID

Built 1955 Load: 16.2 t ADT: 79

LONG CREEK ROAD

Good

Over: CLEAR CREEK

4.5 MI NE OF LOWMAN ID, Boise, ID

Built 1980 Load: 18.8 t ADT: 20

N.FK. BOISE R. RD.

Good

Over: CROOKED RIVER

3 MI N OF BARBER FLAT, Boise, ID

Built 1957 Load: 19.8 t ADT: 40

HUNTER CK-CRKD. R.

Good

Over: BEAR CREEK

3.8 MI N.W. OF DEER PARK, Boise, ID

Built 1963 Load: 19.8 t ADT: 12

HUNTER CK-CRKD. R.

Good

Over: CROOKED RIVER

6.8 MI NNW OF DEER PARK, Boise, ID

Built 1963 Load: 24.3 t ADT: 12

WAPITI ROAD

Good

Over: SOUTH FORK PAYETTE RIVER

WAPITI CR SUMMER HOME, Boise, ID

Built 1976 Load: 25.3 t ADT: 25

ROUGH CREEK ROAD

Good

Over: MORES CREEK

8.5 MI NE IDAHO CITY, Boise, ID

Built 1979 Load: 27.2 t ADT: 25

W. WILLOW-BIG OWL

Good

Over: CROOKED RIVER

2 MI E. OF EDNA CREEK CG, Boise, ID

Built 1971 Load: 27.5 t ADT: 15

OKEEFE CREEK ROAD

Good

Over: CLEAR CREEK

9 MI NNE OF LOWMAN, ID, Boise, ID

Built 1966 Load: 27.5 t ADT: 10

WILLOW CK.-CRKD.R.

Good

Over: CROOKED RIVER

7 MI NW DEER PARK, Boise, ID

Built 1970 Load: 28.5 t ADT: 5

LT. ANDERSON CK RD

Good

Over: ANDERSON CREEK

2 MI NE OF GARDEN VALLEY, Boise, ID

Built 1983 Load: 28.5 t ADT: 12

PARK CK. C.G. RD.

Good

Over: CLEAR CREEK

3 MI N.E. OF LOWMAN, ID, Boise, ID

Built 1957 Load: 33.0 t ADT: 25

SUMMIT FLAT ROAD

Good

Over: GRIMES CREEK

5 MI SW OF PINE FLATS CG, Boise, ID

Built 1982 Load: 33.7 t ADT: 12

NFSR 347

Good

Over: GRAYBACK GULCH

2.5 MI SW OF IDAHO CITY, Boise, ID

Built 2018 Load: 35.0 t ADT: 50

PIONEER ROAD

Good

Over: SHAFER CREEK

1.0S 0.1W HORSESHOE BEND, Boise, ID

Built 1988 Load: 36.3 t ADT: 280

GRAND JEAN ROAD

Good

Over: CANYON CREEK

.25 MI N WAPITI CK TRACT, Boise, ID

Built 1972 Load: 39.2 t ADT: 80

SH 21

Good

Over: MORES CR.;WILDCAT GULCH

8.5 S. IDAHO CITY, Boise, ID

Built 1990 Load: 39.9 t ADT: 2,000

DEADWD.-SCT.MT.RD.

Good

Over: EAST BIG PINE CREEK

4 MI NE DANSKIN, Boise, ID

Built 2007 Load: 41.1 t ADT: 15

EDNA CK.-L.OWL RD.

Good

Over: PIKES FORK CREEK

3 MI ENE OF EDNA CR CG, Boise, ID

Built 2005 Load: 41.5 t ADT: 50

HUNTER CK-CRKD. R.

Good

Over: BEAR RIVER

3 MI N.W. OF DEER PARK, Boise, ID

Built 1965 Load: 41.8 t ADT: 12

SH 21

Good

Over: MORES CR;MCKINLEY GULCH

5.9 S. IDAHO CITY, Boise, ID

Built 1990 Load: 43.5 t ADT: 2,000

AVELENE CK. ROAD

Poor

Over: GRIMES CREEK

9 MI SW OF IDAHO CITY, Boise, ID

Built 1954 Load: 9.1 t ADT: 20

COTTONWD-BANNOCK

Poor

Over: MORES CREEK

1 MI ESE OF IDAHO CITY, Boise, ID

Built 1962 Load: 20.7 t ADT: 30

BOULDER CREEK ROAD

Poor

Over: MORES CREEK

5 MI NE IDAHO CITY, Boise, ID

Built 1982 Load: 24.0 t ADT: 50

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.