Jefferson County, ID

55 public highway bridges

Jefferson County Bridge Snapshot

Jefferson County, Idaho contains 55 public highway bridges in the FHWA National Bridge Inventory. Roughly 20% are rated “Good,” 69.1% “Fair,” 3.6% “Poor,” and 3.6% 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.

55
Total Bridges
20%
Good
3.6%
Poor
3.6%
Structurally Deficient

Condition Distribution

Good
20% (11)
Fair
69.1% (38)
Poor
3.6% (2)
SD
3.6% (2)

All Bridges (55)

US 20B

Unknown

Over: US 20 NB-SB;S.RIGBY IC

0.5 S. RIGBY, Jefferson, ID

Built 1976 ADT: 20,000

DIAMOND ROAD

Unknown

Over: I 15 NB-SB;DIAMOND RD.GS

1.8 N. ROBERTS, Jefferson, ID

Built 1968 ADT: 5,800

E 1900 N

Unknown

Over: I 15 NB-SB;E 1900 N GS

1.8 S. HAMER, Jefferson, ID

Built 1960 ADT: 4,700

CAMAS CREEK ROAD

Unknown

Over: I 15 NB-SB;HAMER IC

AT HAMER, Jefferson, ID

Built 1960 ADT: 4,700

WEST CAMAS ROAD

Fair

Over: CAMAS CREEK

0.7 MI. W OF HDQTRS, Jefferson, ID

Built 1940 Load: 14.5 t ADT: 5

N 4950 E

Fair

Over: DRY BED SNAKE RIVER

1.0 N. 3.1 E. RIRIE, Jefferson, ID

Built 1968 Load: 16.3 t ADT: 550

2ND EAST STREET

Fair

Over: ANDERSON CANAL

IN RIRIE;2ND E.ST, Jefferson, ID

Built 1968 Load: 16.3 t ADT: 180

N 2375 E (CAL IDA)

Fair

Over: CAMAS CREEK;S.CAMAS BR

0.5 S. CAMAS, Jefferson, ID

Built 1972 Load: 16.3 t ADT: 40

E 100 N RD

Fair

Over: BURGESS CANAL

3.0 S. 0.2 W. LEWISVILLE, Jefferson, ID

Built 1970 Load: 19.8 t ADT: 310

N 4950 E

Fair

Over: FARMERS FRIEND CANAL

0.4 N. 3.1 E. RIRIE, Jefferson, ID

Built 1950 Load: 20.0 t ADT: 550

E 300 N

Fair

Over: DRYBED CANAL;E.GROVER BR

5.6 E. RIGBY, Jefferson, ID

Built 1977 Load: 20.9 t ADT: 380

550 WEST ROAD

Fair

Over: LONG ISLAND CANAL

0.2 N. 0.9 W. LABELLE, Jefferson, ID

Built 1973 Load: 20.9 t ADT: 40

N 4100 E

Fair

Over: LEWISVILLE CANAL

1.0 N. 1.6 E. RIGBY, Jefferson, ID

Built 1969 Load: 20.9 t ADT: 1,600

MAIN DIVERSION RD

Fair

Over: CAMAS CREEK

1.3 MI. NE OF HDQTRS, Jefferson, ID

Built 1975 Load: 20.9 t ADT: 2

N 4950 E

Fair

Over: EAGLE ROCK CANAL

0.2 N. 3.1 E. RIRIE, Jefferson, ID

Built 1950 Load: 21.8 t ADT: 550

STC 6731;55TH EAST

Fair

Over: HARRISON CANAL

2.3 N. 2 E. UCON, Jefferson, ID

Built 1961 Load: 22.7 t ADT: 3,900

N 1300 E RD(BYRNE)

Fair

Over: OWSLEY CANAL;S TERRETON

0.9 S. TERRETON, Jefferson, ID

Built 1976 Load: 23.4 t ADT: 40

STC 6768;N 4700 E

Fair

Over: FARMERS FRIEND CANAL

0.5 E. 0.7 N. RIRIE, Jefferson, ID

Built 1950 Load: 23.6 t ADT: 2,200

NORTH 4825 EAST

Fair

Over: ENTERPRISE CANAL

0.8 N. 1.8 E. RIRIE, Jefferson, ID

Built 1970 Load: 24.3 t ADT: 80

105TH EAST RD

Fair

Over: HARRISON CANAL

0.3 N. 2.4 W. RIRIE, Jefferson, ID

Built 1974 Load: 24.3 t ADT: 90

N 1800 E RD

Fair

Over: CAMAS CREEK

2.9 N. 5.0 E. TERRETON, Jefferson, ID

Built 1969 Load: 24.3 t ADT: 200

N 3600 E RD (HITT)

Fair

Over: DRY BED CR;NE.LEWISVILLE

0.9 N. 1.5 E. LEWISVILLE, Jefferson, ID

Built 1967 Load: 24.3 t ADT: 30

RAYS LAKE ROAD

Fair

Over: CAMAS CREEK

4.3 MI. SSW OF HDQTRS, Jefferson, ID

Built 1939 Load: 24.3 t ADT: 5

N 1200 E RD

Fair

Over: OWSLEY CNL;SW.TERRETON

0.9 S. 1.0 W. TERRETON, Jefferson, ID

Built 1974 Load: 25.2 t ADT: 40

N 5050 E

Fair

Over: SNAKE RIVER;HEISE BR

1.3 N. 4.0 E. RIRIE, Jefferson, ID

Built 1975 Load: 26.1 t ADT: 550

N 3200 E (HUNTER)

Fair

Over: DRY BED CR;W.LEWISVILLE

0.3 N. 2.6 W. LEWISVILLE, Jefferson, ID

Built 1964 Load: 26.3 t ADT: 40

N 4600 E

Fair

Over: RUDY CANAL

2.0 N. 0.4 W. RIRIE, Jefferson, ID

Built 1973 Load: 27.0 t ADT: 20

SH 48

Fair

Over: SNAKE RIVER DRY BED

0.5 N. LEWISVILLE, Jefferson, ID

Built 1980 Load: 27.2 t ADT: 1,800

E 620 N

Fair

Over: LONG ISLAND CANAL

3.2 N. 1.4 W. RIGBY, Jefferson, ID

Built 1967 Load: 27.9 t ADT: 70

STC 6709;N 4200 E

Fair

Over: DRY BED CR;S.LABELLE BR

1.0 S. 0.1 W. LABELLE, Jefferson, ID

Built 1973 Load: 27.9 t ADT: 160

N 4300 E

Fair

Over: HARRISON CANAL

0.3 N. 3.4 W. RIRIE, Jefferson, ID

Built 1973 Load: 28.1 t ADT: 60

OLD YELLOWSTONE HW

Fair

Over: BURGESS CANAL

0.5 S. 0.1 E. RIGBY, Jefferson, ID

Built 1940 Load: 28.1 t ADT: 3,600

STC6731;W 145 N

Fair

Over: IDAHO CANAL

9.3 N. 0.9 W. IDAHO FALLS, Jefferson, ID

Built 1967 Load: 29.9 t ADT: 2,600

N 4000 E

Fair

Over: BURGESS CANAL

0.5 S. 0.6 E. RIGBY, Jefferson, ID

Built 1976 Load: 32.4 t ADT: 210

SH 48

Fair

Over: MARKET LAKE CANAL

IN ROBERTS, Jefferson, ID

Built 1968 Load: 32.7 t ADT: 2,800

STC 6715(N 3400 E)

Fair

Over: DRY BED CANAL

0.3 S. MENAN, Jefferson, ID

Built 1957 Load: 32.7 t ADT: 1,100

OLD HWY 20

Fair

Over: PARKS LEWISVILLE CANAL

1.2 N. 0.8 E. RIGBY, Jefferson, ID

Built 1939 Load: 32.7 t ADT: 3,400

N YELLOWSTONE HWY

Fair

Over: DRY BED CANAL

1.7 N. 1.2 E. RIGBY, Jefferson, ID

Built 1999 Load: 39.0 t ADT: 3,400

SH 48

Fair

Over: BURGESS CANAL

6.4 E. RIGBY, Jefferson, ID

Built 1986 Load: 39.9 t ADT: 2,000

S6746;MENAN-LORENZ

Fair

Over: ISLAND CANAL

3.9 N 1.6 E RIGBY, Jefferson, ID

Built 2011 Load: 43.5 t ADT: 2,700

N YELLOWSTONE HWY

Fair

Over: DRY BED CANAL

1.8 N. 1.2 E. RIGBY, Jefferson, ID

Built 1999 Load: 71.7 t ADT: 3,400

STC6732;OLD HWY 91

Fair

Over: CAMAS CREEK

4.3 N. 1.0 W. HAMER, Jefferson, ID

Built 2001 Load: 80.7 t ADT: 280

BRINDLEY ROAD

Good

Over: CAMAS CREEK

1.9 MI. SSW OF HDQTRS, Jefferson, ID

Built 1980 Load: 14.5 t ADT: 10

STC 6743 (E 200 N)

Good

Over: MARKET LAKE CANAL

4.5 S. 0.7 E. ROBERTS, Jefferson, ID

Built 1959 Load: 18.1 t ADT: 760

N 1400 E RD (ORME)

Good

Over: OWSLEY CANAL;SE TERRETON

0.9 S. 1.0 E. TERRETON, Jefferson, ID

Built 1976 Load: 23.4 t ADT: 50

N 2900 E(HACKWART)

Good

Over: BUTTE MARKET LAKE CANAL

4.0 S. 0.2 E. ROBERTS, Jefferson, ID

Built 1975 Load: 24.3 t ADT: 30

NORTH 4850 EAST RD

Good

Over: ANDERSON CANAL

0.1 N. 2.0 E. RIRIE, Jefferson, ID

Built 1974 Load: 25.2 t ADT: 20

N 2900 E RD

Good

Over: BUTTE MARKET LAKE CANAL

1.0 N. 0.2 E. ROBERTS, Jefferson, ID

Built 1974 Load: 25.2 t ADT: 30

N 3600 E RD

Good

Over: BURGESS CANAL

1.1 S. 3.4 W. RIGBY, Jefferson, ID

Built 1967 Load: 25.2 t ADT: 290

N 3980 EAST ROAD

Good

Over: DRY BED

1.8 N. 0.3 E. RIGBY, Jefferson, ID

Built 1992 Load: 25.4 t ADT: 100

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

Related

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