Canyon County, ID

77 public highway bridges

Canyon County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Canyon County, Idaho contains 77 public highway bridges. Roughly 22.1% are rated “Good,” 66.2% “Fair,” and 1.3% “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.

77
Total Bridges
22.1%
Good
66.2%
Fair
1.3%
Poor Condition

Condition Distribution

Good
22.1% (17)
Fair
66.2% (51)
Poor
1.3% (1)

All Bridges (77)

SH 44

Unknown

Over: I 84 EB-WB;MIDDLETON IC

1.9 W. CALDWELL, Canyon, ID

Built 1964 ADT: 43,000

SH 55

Unknown

Over: I 84;KARCHER-MIDLAND IC

IN NAMPA, Canyon, ID

Built 2006 ADT: 86,500

I 84 WBL

Unknown

Over: PURPLE SAGE GS

3.3 W. CALDWELL, Canyon, ID

Built 1962 ADT: 1,300

I 84 WBL & EBL

Unknown

Over: I 84B ;GARRITY BLVD IC

AT NAMPA ECL, Canyon, ID

Built 2011 ADT: 29,000

US 95

Unknown

Over: US20;UPRR;US 20-95 IC

1.5 E. PARMA, Canyon, ID

Built 2017 ADT: 7,000

SMA8353;16TH AVE

Unknown

Over: UPRR;1ST ST N

IN NAMPA;16TH AVE, Canyon, ID

Built 1969 ADT: 100

STC 8433; 11TH AVE

Unknown

Over: I 84;11TH AVE N. GS

IN NAMPA;11th AVE N., Canyon, ID

Built 2010 ADT: 105,500

GALLOWAY ROAD

Unknown

Over: I 84;GALLOWAY ROAD GS

4.3 W. CALDWELL, Canyon, ID

Built 1962 ADT: 30,500

TUCKER ROAD

Fair

Over: DIXIE SLOUGH

1.2 N. 3.4 E. WILDER, Canyon, ID

Built 1990 Load: 15.4 t ADT: 20

STP 8213;MIDDLETON

Fair

Over: CALDWELL HIGHLINE CANAL

4.0 S. 0.3 E. MIDDLETON, Canyon, ID

Built 1950 Load: 16.3 t ADT: 9,400

PARMA ROAD

Fair

Over: D LINE CANAL

2.4 N. 0.4 E. PARMA, Canyon, ID

Built 1971 Load: 16.3 t ADT: 90

WALKER LAKE ROAD

Fair

Over: HIGH LINE CANAL

1.3 N. 3.5 E. MARSING, Canyon, ID

Built 1967 Load: 16.3 t ADT: 90

BURDEN ROAD

Fair

Over: FARMERS COOP SEBREE CNL

0.8 N. 1.4 E. PARMA, Canyon, ID

Built 1977 Load: 16.3 t ADT: 360

NHS 3761;NORTHSIDE

Fair

Over: FIFTEEN MILE CREEK

3.2 S. 2.3 E. MIDDLETON, Canyon, ID

Built 1970 Load: 16.3 t ADT: 4,200

STC 8433;11TH AVE

Fair

Over: PHYLLIS CNL;11TH AVE EXT

IN NAMPA, Canyon, ID

Built 1994 Load: 16.3 t ADT: 5,000

STC7808;MIDDLETON

Fair

Over: WILLOW CREEK

1.3 N. 0.3 E. MIDDLETON, Canyon, ID

Built 1978 Load: 16.3 t ADT: 910

STC 7863;S.5TH AVE

Fair

Over: INDIAN CREEK

IN CALDWELL;S. 5TH AVE., Canyon, ID

Built 1935 Load: 16.3 t ADT: 2,900

BOISE STREET

Fair

Over: MILL SLOUGH

AT MIDDLETON SCL, Canyon, ID

Built 1981 Load: 17.2 t ADT: 200

STC3790;ALLENDALE

Fair

Over: LOW LINE CANAL

3.7 S. 2.O E. WILDER, Canyon, ID

Built 1939 Load: 18.1 t ADT: 240

STC 8423;LK LOWELL

Fair

Over: DEER FLAT NAMPA CANAL

1.3 S 2.8 W NAMPA, Canyon, ID

Built 1992 Load: 20.9 t ADT: 6,200

SMA 3723;ROBINSON

Fair

Over: MORA CANAL

8.2 S. 3.4 E. NAMPA, Canyon, ID

Built 1984 Load: 20.9 t ADT: 1,200

S3792;UPPR PLEASNT

Fair

Over: DEER FLAT LOW LINE CANAL

2.0 S. 4.8 E. WILDER, Canyon, ID

Built 1950 Load: 20.9 t ADT: 280

STC3762;GREENHURST

Fair

Over: NEW YORK CANAL

3.0S 4.0E NAMPA CITY CTR, Canyon, ID

Built 1972 Load: 20.9 t ADT: 2,800

STC3755;SOUTHSIDE

Fair

Over: MORA CANAL

8.9 S. 1.4 E. NAMPA, Canyon, ID

Built 1975 Load: 20.9 t ADT: 1,400

SMA8513;ID CNTR RD

Fair

Over: PHYLLIS CANAL

2.5 N. 2.4 E. NAMPA, Canyon, ID

Built 1987 Load: 20.9 t ADT: 25,000

PEEBLES LANE

Fair

Over: RIVERSIDE CANAL

3.0 S. 2.4 W. PARMA, Canyon, ID

Built 1977 Load: 20.9 t ADT: 250

DIP LANE

Fair

Over: FARMERS COOP CANAL

1.8 S. 5.2 E. PARMA, Canyon, ID

Built 1979 Load: 20.9 t ADT: 200

STC3738;SHELTON RD

Fair

Over: FARMERS COOP SEBREE CNL

0.6 N. 1.8 E. PARMA, Canyon, ID

Built 1975 Load: 20.9 t ADT: 580

HOLLOW ROAD

Fair

Over: 'C' LINE WEST CANAL

9.1 N. 0.4 E. CALDWELL, Canyon, ID

Built 1985 Load: 20.9 t ADT: 70

SMA8443;VICTORY RD

Fair

Over: RIDENBAUGH CANAL

4.0 E NAMPA, Canyon, ID

Built 1980 Load: 20.9 t ADT: 3,900

S. 9TH AVENUE

Fair

Over: INDIAN CREEK

IN CALDWELL;S.9TH AVE, Canyon, ID

Built 1968 Load: 20.9 t ADT: 750

STEPHEN LANE

Fair

Over: RIVERSIDE CANAL

3.2 S. 0.7 W. PARMA, Canyon, ID

Built 1983 Load: 21.8 t ADT: 200

GOTSCH ROAD

Fair

Over: 'D' LINE CANAL

0.7 N. 3.7 E. PARMA, Canyon, ID

Built 1974 Load: 24.3 t ADT: 100

STP8393;FRANKLIN B

Fair

Over: PHYLLIS CANAL

IN NAMPA;FRANKLIN BLVD., Canyon, ID

Built 1963 Load: 24.5 t ADT: 23,000

STP8393;FRANKLIN B

Fair

Over: PHYLLIS CANAL

IN NAMPA;FRANKLIN BLVD., Canyon, ID

Built 1963 Load: 25.4 t ADT: 26,500

US 95

Fair

Over: GOLDEN GATE CANAL

WILDER SCL, Canyon, ID

Built 1956 Load: 26.3 t ADT: 7,100

SH 45

Fair

Over: MORA CANAL

7.5 S. NAMPA, Canyon, ID

Built 1956 Load: 27.2 t ADT: 3,400

I 84 EB OFF RAMP

Fair

Over: BOISE RIVER;RAMP AB BR

IN CALDWELL, Canyon, ID

Built 1980 Load: 27.2 t ADT: 5,000

STC 3730;RIVERSIDE

Fair

Over: DEER FLAT HIGH LINE CNL

1.8 N. 3.3 E. MARSING, Canyon, ID

Built 1986 Load: 28.1 t ADT: 970

E. SIMPLOT BLVD.

Fair

Over: INDIAN CREEK

IN CALDWELL, Canyon, ID

Built 1965 Load: 28.1 t ADT: 280

LINDEN ROAD

Fair

Over: MASON CREEK

1.0 S. 4.5 E. CALDWELL, Canyon, ID

Built 1974 Load: 28.1 t ADT: 6,700

I 84

Fair

Over: FARMERS SEBREE CANAL

IN CALDWELL, Canyon, ID

Built 1980 Load: 29.9 t ADT: 51,000

US 95

Fair

Over: RIVERSIDE CANAL

4 N. WILDER, Canyon, ID

Built 1964 Load: 29.9 t ADT: 3,900

OLD FORT BOISE RD.

Fair

Over: 'D' LINE CANAL

2.4 N. 0.3 E. PARMA, Canyon, ID

Built 1984 Load: 29.9 t ADT: 90

LYNWOOD ROAD

Fair

Over: MORA CANAL

8.8 S. 1.6 W. NAMPA, Canyon, ID

Built 1998 Load: 30.8 t ADT: 90

HOLLOW ROAD

Fair

Over: 'C' LINE EAST CANAL

9.1 N. 1.0 E. CALDWELL, Canyon, ID

Built 1977 Load: 32.4 t ADT: 50

SMA7808;MIDDLETON

Fair

Over: MILL SLOUGH

MIDDLETON NE CITY LIMITS, Canyon, ID

Built 1999 Load: 32.7 t ADT: 3,400

STC 3790;ALLENDALE

Fair

Over: GOLDEN GATE CANAL

0.6 S. 2.0 E. WILDER, Canyon, ID

Built 1992 Load: 32.7 t ADT: 240

TUCKER ROAD

Fair

Over: LOW LINE CANAL

1.0 S. 4.0 E. WILDER, Canyon, ID

Built 1997 Load: 32.7 t ADT: 70

BROADMORE WAY

Fair

Over: INDIAN CREEK

IN NAMPA, Canyon, ID

Built 1948 Load: 33.6 t ADT: 20

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.