Cassia County, ID

38 public highway bridges

Cassia County Bridge Snapshot

Cassia County, Idaho contains 38 public highway bridges in the FHWA National Bridge Inventory. Roughly 13.2% are rated “Good,” 76.3% “Fair,” 0% “Poor,” and 0% 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.

38
Total Bridges
13.2%
Good
0%
Poor
0%
Structurally Deficient

Condition Distribution

Good
13.2% (5)
Fair
76.3% (29)
Poor
0% (0)
SD
0% (0)

All Bridges (38)

I 84 WBL

Unknown

Over: SOUTHSIDE CANAL

9.4 E. BURLEY, Cassia, ID

Built 1960 ADT: 100

I 84

Unknown

Over: CO.RD.;HORSE BUTTE GS

16.6 E. BURLEY, Cassia, ID

Built 1963 ADT: 30

IDAHOME ROAD

Unknown

Over: I 84 EB-WB;IDAHOME RD GS

8.2 W. SUBLETT, Cassia, ID

Built 1967 ADT: 11,500

SUBLETT ROAD

Unknown

Over: I 84 EB-WB;SUBLETT RD IC

AT SUBLETT, Cassia, ID

Built 1967 ADT: 11,000

300 NORTH ROAD

Fair

Over: MAIN SOUTHSIDE CANAL

3.8N 1.2E DECLO;965E-300N, Cassia, ID

Built 1976 Load: 16.3 t ADT: 450

00 SOUTH ROAD

Fair

Over: MAIN SOUTHSIDE CANAL

0.8N 0.2W DECLO;830E-00S, Cassia, ID

Built 1972 Load: 16.3 t ADT: 100

500 SOUTH ROAD

Fair

Over: 'J' CANAL

5.3S 1.7W BURLEY;175W500S, Cassia, ID

Built 1970 Load: 16.3 t ADT: 100

200 SOUTH ROAD

Fair

Over: 'J' CANAL

1.0S 1.2E DECLO;970E-200S, Cassia, ID

Built 1984 Load: 18.1 t ADT: 110

W 200 SOUTH ROAD

Fair

Over: 'J' CANAL

2.3 S. 3.1 W. BURLEY, Cassia, ID

Built 1977 Load: 20.9 t ADT: 340

1050 EAST ROAD

Fair

Over: 'H' CANAL

0.5N 2.0E DECLO;35S-1050E, Cassia, ID

Built 1974 Load: 20.9 t ADT: 100

400 SOUTH ROAD

Fair

Over: 'H' CANAL

3.2S 1.7W DECLO;670E-400S, Cassia, ID

Built 1975 Load: 20.9 t ADT: 160

550 EAST ROAD

Fair

Over: 'J' CANAL

5.8S 3.0W DECLO;655S-550E, Cassia, ID

Built 1973 Load: 20.9 t ADT: 100

E 100 S

Fair

Over: 'G' CANAL;E.BURLEY BR

1.4S 1.0E BURLEY;100E100S, Cassia, ID

Built 1976 Load: 20.9 t ADT: 1,400

1100 EAST ROAD

Fair

Over: 'J' CANAL;SE.DECLO BR

.3S 2.5E DECLO;110S-1100E, Cassia, ID

Built 1972 Load: 20.9 t ADT: 100

200 SOUTH ROAD

Fair

Over: 'G' CANAL

1.2 S. 3.1 W. DECLO, Cassia, ID

Built 1988 Load: 20.9 t ADT: 200

200 SOUTH ROAD

Fair

Over: 'G' CANAL

1.2 S. 3.2 W. DECLO, Cassia, ID

Built 1988 Load: 20.9 t ADT: 200

950 EAST ROAD

Fair

Over: MAIN SOUTH SIDE CANAL

2.8N 1.0E DECLO;195N-950E, Cassia, ID

Built 1992 Load: 20.9 t ADT: 100

STC7632;HILAND AVE

Fair

Over: 'G' CANAL

100 S 50 E;HILAND AVE, Cassia, ID

Built 1973 Load: 20.9 t ADT: 3,300

DAM ROAD

Fair

Over: EAST CANAL

2.7 S. 1.5 W. OAKLEY, Cassia, ID

Built 2015 Load: 23.6 t ADT: 20

REID SPRING ROAD

Fair

Over: RAFT RIVER

3.5 S. 1.0 E. ALMO, Cassia, ID

Built 2001 Load: 24.5 t ADT: 200

100 SOUTH ROAD

Fair

Over: 'H' CANAL;E.DECLO BR

0.2S 1.1E DECLO;955E-100S, Cassia, ID

Built 1985 Load: 25.4 t ADT: 100

S 100 W

Fair

Over: H CANAL

2.5 S 1.0 W BURLEY, Cassia, ID

Built 1983 Load: 25.4 t ADT: 410

790N-1350E

Fair

Over: MAIN SOUTHSIDE CANAL

8.9 N. 5.0 E. DECLO, Cassia, ID

Built 1980 Load: 26.3 t ADT: 50

E. 100 S.

Fair

Over: MARSH CREEK

0.2 S. 2.4 E. DECLO, Cassia, ID

Built 1999 Load: 27.2 t ADT: 100

50 EAST ROAD

Fair

Over: 'J' CANAL;SE.BURLEY BR

6.1S 0.5E BURLEY;580S-50E, Cassia, ID

Built 1975 Load: 28.1 t ADT: 100

50 WEST ROAD

Fair

Over: 'H' CANAL

2.6S 0.1W BURLEY;220S-50W, Cassia, ID

Built 1989 Load: 30.8 t ADT: 450

SH 77

Fair

Over: CANAL

6.4 N. ALBION, Cassia, ID

Built 1985 Load: 32.7 t ADT: 1,800

500N-1130E

Fair

Over: MAIN SOUTHSIDE CANAL

6.0 N. 2.9 E. DECLO, Cassia, ID

Built 1981 Load: 33.3 t ADT: 100

STC2739;ROCK CR RD

Fair

Over: ROCK CREEK;SHOE CR.BR.

19.2 S. HANSON, Cassia, ID

Built 1971 Load: 35.4 t ADT: 590

150 EAST ROAD

Fair

Over: 'J' CANAL

6.7S 1.5E BURLEY;630S150E, Cassia, ID

Built 1996 Load: 37.2 t ADT: 100

150 EAST ROAD

Fair

Over: 'G' CANAL

2.0 S. 1.5 E. BURLEY, Cassia, ID

Built 2001 Load: 50.8 t ADT: 200

950 EAST ROAD

Fair

Over: 'J' CANAL

2.5S 1.0E DECLO;240S-950E, Cassia, ID

Built 2015 Load: 51.2 t ADT: 100

W 1000 S

Fair

Over: BIG COTTONWOOD CREEK

5.4 W. 6.5 S. PELLA, Cassia, ID

Built 1970 Load: 89.8 t ADT: 670

STC2739;ROCK CR RD

Good

Over: ROCK CREEK

17.8 S. HANSON, Cassia, ID

Built 1971 Load: 32.7 t ADT: 590

S 400 W

Good

Over: G CANAL

4.0 W 0.7 S BURLEY, Cassia, ID

Built 1994 Load: 35.4 t ADT: 990

650 EAST ROAD

Good

Over: 'H' CANAL

3.7S 2.0W DECLO;450S-650E, Cassia, ID

Built 2022 Load: 45.7 t ADT: 90

EAST MAIN STREET

Good

Over: EAST CANAL

IN OAKLEY, Cassia, ID

Built 2020 Load: 49.6 t ADT: 350

S 1050 E RD

Good

Over: J CANAL

2.0 E 0.75 S DECLO, Cassia, ID

Built 2000 Load: 63.5 t ADT: 30

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