Canyon County, ID

77 public highway bridges

Canyon County Bridge Snapshot

Canyon County, Idaho contains 77 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.1% are rated “Good,” 66.2% “Fair,” 1.3% “Poor,” and 1.3% 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.

77
Total Bridges
22.1%
Good
1.3%
Poor
1.3%
Structurally Deficient

Condition Distribution

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

All Bridges (77)

STC 3724;HOMEDALE

Fair

Over: GOLDEN GATE LOW LINE CNL

7.9 E. HOMEDALE, Canyon, ID

Built 1991 Load: 35.4 t ADT: 2,500

STC8317;LANSING RD

Fair

Over: CANYON CANAL

2.4 E. MIDDLETON, Canyon, ID

Built 2003 Load: 35.4 t ADT: 2,700

STC 3763;MARKET RD

Fair

Over: FARMERS COOP SEBREE CNL

0.7 S. 3.2 E. PARMA, Canyon, ID

Built 1990 Load: 37.2 t ADT: 640

STC3717;FRIENDS RD

Fair

Over: GOLDEN GATE CANAL

1.1 S. 4.5 E. WILDER, Canyon, ID

Built 1967 Load: 37.2 t ADT: 480

STC3717;FRIENDS RD

Fair

Over: DEER FLAT LOW LINE CANAL

1.9 S. 4.5 E. WILDER, Canyon, ID

Built 1961 Load: 38.1 t ADT: 480

BATT CORNER ROAD

Fair

Over: RIVERSIDE CANAL

3.7 S. 1.3 E. PARMA, Canyon, ID

Built 1997 Load: 40.8 t ADT: 400

CHISHOLM DRIVE

Fair

Over: PHYLLIS CANAL

1.4 N. 0.2 E. NAMPA, Canyon, ID

Built 1996 Load: 40.8 t ADT: 5

S. FLORIDA

Fair

Over: PHYLLIS CANAL

4.2 S. 1.2 E. CALDWELL, Canyon, ID

Built 2001 Load: 56.2 t ADT: 2,600

E. STAGE COACH RD

Fair

Over: MORA CANAL

4.5 N. 0.5 W. MELBA, Canyon, ID

Built 2004 Load: 84.4 t ADT: 200

TOWN CIRCLE ROAD

Good

Over: SEBREE CANAL

2.7 S. 5.4 E. NOTUS, Canyon, ID

Built 1980 Load: 27.2 t ADT: 400

FROST ROAD

Good

Over: LOW LINE CANAL

5.2 S. 5.5 E. WILDER, Canyon, ID

Built 1990 Load: 27.9 t ADT: 50

STC 3747;LAKESHORE

Good

Over: NEW YORK CANAL

4.7S 0.9W NAMPA CITY CTR, Canyon, ID

Built 1986 Load: 28.1 t ADT: 3,600

SUGAR AVENUE

Good

Over: INDIAN CREEK

IN NAMPA, Canyon, ID

Built 2004 Load: 28.1 t ADT: 190

S. 4TH AVENUE

Good

Over: INDIAN CREEK

IN CALDWELL; S 4TH AVE, Canyon, ID

Built 2023 Load: 32.7 t ADT: 470

I 84 EBL

Good

Over: PHYLLIS CANAL

IN NAMPA, Canyon, ID

Built 2012 Load: 33.4 t ADT: 52,750

FARNER ROAD

Good

Over: MORA CANAL

3.5 S. 6.6 W. NAMPA, Canyon, ID

Built 2003 Load: 34.5 t ADT: 50

SABIN ROAD

Good

Over: FARMERS COOP SEBREE CNL

2.7 E. PARMA, Canyon, ID

Built 1985 Load: 35.4 t ADT: 90

GEORGIA AVE

Good

Over: WILSON DRAIN

IN CALDWELL, Canyon, ID

Built 2005 Load: 36.3 t ADT: 80

I 84 EBL & WBL

Good

Over: UPRR;EAST LATERAL CANAL

AT NAMPA WCL, Canyon, ID

Built 2021 Load: 36.6 t ADT: 96,000

I 84 WBL

Good

Over: PHYLLIS CANAL

IN NAMPA, Canyon, ID

Built 2012 Load: 37.2 t ADT: 52,750

I 84 EBL

Good

Over: UPRR

IN NAMPA NCL, Canyon, ID

Built 2011 Load: 38.1 t ADT: 52,750

I 84 WBL

Good

Over: UPRR

IN NAMPA NCL, Canyon, ID

Built 2011 Load: 38.1 t ADT: 52,750

CAN-ADA ROAD

Good

Over: WALDVOGEL CANAL

0.3 S. 0.9 E. MELBA, Canyon, ID

Built 2007 Load: 38.1 t ADT: 300

NOTUS CANAL

Good

Over: I84 EBL WBL

IN CALDWELL, Canyon, ID

Built 2022 Load: 38.9 t ADT: 67,500

STC3753;LONE STAR

Good

Over: CALDWELL CANAL

6.0 S 1.4 E CALDWELL, Canyon, ID

Built 2010 Load: 46.3 t ADT: 710

STC8533;SMITH AVE

Good

Over: PHYLLIS CANAL

0.3 N 3.2 W NAMPA, Canyon, ID

Built 2010 Load: 55.3 t ADT: 590

ROSE GARDEN RD

Poor

Over: NOTUS CANAL

CALDWELL;ROSE GARDEN RD, Canyon, ID

Built 1935 Load: 10.9 t ADT: 600

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

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