Bannock County, ID

25 public highway bridges

Bannock County Bridge Snapshot

Bannock County, Idaho contains 25 public highway bridges in the FHWA National Bridge Inventory. Roughly 24% are rated “Good,” 40% “Fair,” 4% “Poor,” and 4% 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.

25
Total Bridges
24%
Good
4%
Poor
4%
Structurally Deficient

Condition Distribution

Good
24% (6)
Fair
40% (10)
Poor
4% (1)
SD
4% (1)

All Bridges (25)

I 15 SBL

Unknown

Over: I 15B;S.POCATELLO IC

2.6 S. POCATELLO, Bannock, ID

Built 1965 ADT: 4,900

I 15 NBL

Unknown

Over: BARTON RD.GS

1.7 S. POCATELLO, Bannock, ID

Built 1964 ADT: 2,400

US 91

Unknown

Over: I 15 NB-SB;VIRGINIA IC

5.5 N. DOWNEY, Bannock, ID

Built 1971 ADT: 12,500

US 91 SBL

Unknown

Over: I 86 EB-WB; CHUBBUCK IC

IN CHUBBUCK, Bannock, ID

Built 2013 ADT: 6,500

S7241;NRTHGTE PKWY

Unknown

Over: I 15 NB-SB;NORTHGATE IC

4.0 N POCATELLO, Bannock, ID

Built 2020 ADT: 29,000

MONTE VISTA DRIVE

Unknown

Over: I 15;MONTE VISTA DR GS

IN POCATELLO, Bannock, ID

Built 1997 ADT: 37,500

SMA7217;S. VALLEY

Unknown

Over: S 2ND;PORTNEUF R;UPRR

1.0 W. OF I-15 IC, Bannock, ID

Built 2016 ADT: 2,000

I 15 SBL

Unknown

Over: SMA 5697;SOUTH VALLEY RD

3.35 SE. POCATELLO, Bannock, ID

Built 2015 ADT: 5,200

IRR BIA RTE 152

Fair

Over: PORTNEUF RIVER

5KM N OF I-86 AT SR30 EXI, Bannock, ID

Built 1960 Load: 5.4 t ADT: 600

E. VIRGINIA ROAD

Fair

Over: MARSH CREEK

0.7 N. 1.7 W. VIRGINIA, Bannock, ID

Built 1959 Load: 17.2 t ADT: 150

STP 7391;S. MAIN

Fair

Over: PORTNEUF RIVER

2.0 S. POCATELLO, Bannock, ID

Built 1967 Load: 22.7 t ADT: 7,800

IRR BIA RTE 68

Fair

Over: SPRING CREEK

16KM W.FT HALL IN BOTTOMS, Bannock, ID

Built 1975 Load: 24.5 t ADT: 60

US 30

Fair

Over: DEER CROSSING

4.7 E. LAVA HOT SPRINGS, Bannock, ID

Built 1976 Load: 28.1 t ADT: 4,300

I 15 NBL

Fair

Over: RAPID CREEK;INKOM

0.1 E. INKOM, Bannock, ID

Built 1963 Load: 29.9 t ADT: 7,750

STP 7151;N MAIN ST

Fair

Over: PORTNEUF RIVER

IN POCATELLO;MAIN ARTHUR, Bannock, ID

Built 1957 Load: 29.9 t ADT: 9,500

W BLACKROCK ROAD

Fair

Over: PORTNEUF R;NW.INKOM BR

0.2 N. 4.0 W. INKOM, Bannock, ID

Built 1948 Load: 32.4 t ADT: 100

I 15 NBL

Fair

Over: PRIVATE RD.;MACHINE PASS

6.9 N. POCATELLO, Bannock, ID

Built 1959 Load: 37.2 t ADT: 14,250

I 86 EBL

Fair

Over: UPRR;CHUBBUCK OVERPASS

0.4 E. CHUBBUCK, Bannock, ID

Built 1963 Load: 39.9 t ADT: 12,750

STC7221;CARSON ST

Good

Over: PORTNEUF RIVER

IN POCATELLO;CARSON ST., Bannock, ID

Built 2023 Load: 32.7 t ADT: 4,500

IRR BIA RTE 68

Good

Over: BIG JIMMEY CREEK

15KM W FT HALL IN BOTTOMS, Bannock, ID

Built 2014 Load: 39.2 t ADT: 35

OLD MALAD HWY

Good

Over: MARSH CREEK

2.0 S. 2.0 W. DOWNEY, Bannock, ID

Built 2018 Load: 42.8 t ADT: 330

US 30

Good

Over: PORTNEUF RIVER

1.9 W. LAVA HOT SPRINGS, Bannock, ID

Built 2008 Load: 46.3 t ADT: 5,800

SMA7217;S. VALLEY

Good

Over: AMI TRAIL

0.3 W. of I15 IC, Bannock, ID

Built 2016 Load: 55.1 t ADT: 5,200

OLYMPUS DR

Good

Over: FUTURE PED UNDERPASS

POCATELLO, Bannock, ID

Built 2018 Load: 55.1 t ADT: 6,500

STC7151;BENTON ST

Structurally Deficient

Over: PORTNEUF RIVER

IN POCATELLO;BENTON ST, Bannock, ID

Built 1969 Load: 25.4 t ADT: 2,800

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