Iron County, WI

52 public highway bridges

Iron County Bridge Snapshot

Iron County, Wisconsin contains 52 public highway bridges in the FHWA National Bridge Inventory. Roughly 51.9% are rated “Good,” 32.7% “Fair,” 7.7% “Poor,” and 7.7% 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 WI 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.

52
Total Bridges
51.9%
Good
7.7%
Poor
7.7%
Structurally Deficient

Condition Distribution

Good
51.9% (27)
Fair
32.7% (17)
Poor
7.7% (4)
SD
7.7% (4)

All Bridges (52)

SNOWMOBILE TRAIL

Unknown

Over: STH 77-SILVER ST

0.1M E JCT USH 51, Iron, WI

Built 1914 ADT: 6,951

WIS CENTRAL

Unknown

Over: STH 169

15.0M N JCT STH 13, Iron, WI

Built 1918 ADT: 331

CNW RR

Unknown

Over: LRD MAPLE ST

0.1M N JCT STH 77, Iron, WI

Built 1911 ADT: 500

WIS CENTRAL

Unknown

Over: LRD MAPLE ST

0.1M N JCT STH 77, Iron, WI

Built 1911 ADT: 500

LRD SANDY BEACH RO

Fair

Over: LOST CREEK

0.5 MI N JCT POWELL RD, Iron, WI

Built 1930 Load: 22.7 t ADT: 120

LRD CENTER DR

Fair

Over: W BR MONTREAL RIVER

1.5M W JCT CTH D, Iron, WI

Built 1912 Load: 24.3 t ADT: 155

STH 77-SILVER ST

Fair

Over: MONTREAL RIVER

0.2M E JCT USH 51, Iron, WI

Built 1965 Load: 25.9 t ADT: 5,300

USH 2 WB

Fair

Over: MONTREAL RIVER

MICHIGAN STATE LINE, Iron, WI

Built 1961 Load: 27.5 t ADT: 2,600

USH 2 EB

Fair

Over: MONTREAL RIVER

0.3M E JCT USH 51 TO S, Iron, WI

Built 1961 Load: 29.2 t ADT: 2,600

STH 77-WISCONSIN A

Fair

Over: W BR MONTREAL RIVER

5.7M E JCT CTH E, Iron, WI

Built 1981 Load: 29.2 t ADT: 2,700

CTH C

Fair

Over: MONTREAL RIVER

1.2M E JCT USH 51, Iron, WI

Built 1975 Load: 32.4 t ADT: 142

STH 77

Fair

Over: POTATO RIVER

8.2M E ASHLAND CO LINE, Iron, WI

Built 1983 Load: 32.4 t ADT: 700

LRD MANY ROCKS ROA

Fair

Over: BLACK LAKE THOROUGHFARE

0.8M N JCT FF, Iron, WI

Built 1970 Load: 32.4 t ADT: 30

LRD W BRANCH RD

Fair

Over: W FK MONTREAL RIVER

3.2M W JCT CTH C, Iron, WI

Built 1987 Load: 35.6 t ADT: 23

LRD RICE LAKE ROAD

Fair

Over: TURTLE RIVER

0.8M N JCT USH 51, Iron, WI

Built 1989 Load: 35.6 t ADT: 175

STH 47-STH 182

Fair

Over: MANITOWISH RIVER

3.6M N JCT STH 182 TO W, Iron, WI

Built 1981 Load: 37.3 t ADT: 760

USH 51

Fair

Over: LAYMANS CREEK

4.0M N JCT CTH G, Iron, WI

Built 1994 Load: 37.3 t ADT: 2,400

LRD SOUTH DRIVE

Fair

Over: W BR MONTREAL RIVER

1.3M S JCT USH 2, Iron, WI

Built 1993 Load: 37.3 t ADT: 85

STH 122

Fair

Over: ALDER CREEK

1.3M N JCT STH 77, Iron, WI

Built 1977 Load: 38.9 t ADT: 80

USH 51

Fair

Over: TURTLE RIVER

0.9M N JCT CTH FF, Iron, WI

Built 1981 Load: 38.9 t ADT: 2,200

STH 47

Fair

Over: SUGAR BUSH CREEK

7.4M N JCT CTH D, Iron, WI

Built 1994 Load: 40.5 t ADT: 670

LRD DUPONT RD

Good

Over: MONTREAL RIVER

4.5M N JCT CTH C, Iron, WI

Built 2003 Load: 29.2 t ADT: 111

STH 122

Good

Over: LAWRENCE CR

7.8 M N JCT CTH E, Iron, WI

Built 2011 Load: 32.4 t ADT: 280

CTH A

Good

Over: ORONTO CREEK

1.3M W JCT STH 122, Iron, WI

Built 2018 Load: 33.7 t ADT: 265

LRD ISLAND LAKE RD

Good

Over: W FK MONTREAL RIVER

9.5M W JCT USH 51, Iron, WI

Built 1991 Load: 34.0 t ADT: 77

CTH E

Good

Over: ALDER CREEK

2.3 MI E STH 122, Iron, WI

Built 2009 Load: 35.3 t ADT: 214

LRD POPKO CIRCLE W

Good

Over: TRUDE LAKE

3 MILES SOUTH OF CTH FF, Iron, WI

Built 2014 Load: 35.3 t ADT: 471

LRD CRAMER LAKE RD

Good

Over: TURTLE RIVER

0.3M W JCT CTH H, Iron, WI

Built 2018 Load: 36.0 t ADT: 100

CTH G

Good

Over: LONG LAKE OUTLET

0.5M N JCT CTH H, Iron, WI

Built 2019 Load: 36.6 t ADT: 100

LRD WEBER RD

Good

Over: WEBER CREEK

0.8M S JCT USH 51, Iron, WI

Built 2001 Load: 37.3 t ADT: 30

IRR BIA RTE 1010

Good

Over: BEAR RIVER

17KM N OF LAC DU FLAMBEAU, Iron, WI

Built 2004 Load: 37.5 t ADT: 50

IRR BIA RTE 10

Good

Over: FLAMBEAU BEAR RIVER

13KM N OF LAC DU FLAMBEAU, Iron, WI

Built 1996 Load: 37.6 t ADT: 50

USH 51

Good

Over: WEBER CREEK

3.5 MILES NORTH OF MERCE, Iron, WI

Built 2017 Load: 37.9 t ADT: 2,200

STH 47

Good

Over: LOST CREEK

250 EAST OF INTERSECTION, Iron, WI

Built 2016 Load: 37.9 t ADT: 760

LRD POPLAR ST

Good

Over: MONTREAL RIVER

0.1M E JCT USH 51, Iron, WI

Built 2010 Load: 38.6 t ADT: 5,591

USH 2

Good

Over: SOO LINE

0.8M E JCT STH 122, Iron, WI

Built 1976 Load: 38.9 t ADT: 3,700

LRD FISCHER LAKE R

Good

Over: TURTLE RIVER

0.5M E JCT CTH H, Iron, WI

Built 2001 Load: 38.9 t ADT: 103

LRD HENDRICKSON RD

Good

Over: BOOMER CREEK

1.7M E JCT CTH B, Iron, WI

Built 2004 Load: 38.9 t ADT: 108

STH 122

Good

Over: MONTREAL RIVER

0.6M N JCT CTH A, Iron, WI

Built 1928 Load: 38.9 t ADT: 200

LRD LAKEHEAD RD

Good

Over: BOOMER CREEK

2.2M N JCT USH 2, Iron, WI

Built 1995 Load: 40.5 t ADT: 98

STH 169

Good

Over: POTATO RIVER

13.9M N JCT STH 13, Iron, WI

Built 1998 Load: 40.5 t ADT: 270

LRD NYLUND ROAD

Good

Over: MONTREAL RIVER

TOWN OF KIMBALL, Iron, WI

Built 1991 Load: 40.5 t ADT: 56

CTH H

Good

Over: TURTLE RIVER

4.5M N JCT USH 51, Iron, WI

Built 1996 Load: 42.1 t ADT: 537

LRD APPLE CREEK RD

Good

Over: POTATO RIVER

1.5M S JCT STH 77, Iron, WI

Built 2018 Load: 43.7 t ADT: 20

STH 182

Good

Over: BEAR RIVER

1.8 MILES WEST OF STH 182, Iron, WI

Built 2016 Load: 46.0 t ADT: 460

STH 169

Good

Over: VAUGHN CR

0.75M N RAILROAD TRESTLE, Iron, WI

Built 2016 Load: 47.6 t ADT: 270

LRD UPSON PARK RD

Good

Over: POTATO RIVER

0.2M W JCT STH 122, Iron, WI

Built 1991 Load: 53.5 t ADT: 52

USH 2

Good

Over: W BR MONTREAL RIVER

5.2M E JCT CTH B, Iron, WI

Built 1974 Load: 66.4 t ADT: 3,500

CTH FF

Poor

Over: TURTLE RIVER

5.5M S JCT USH 51, Iron, WI

Built 1967 Load: 17.8 t ADT: 780

LRD CLEMENT RD (DE

Poor

Over: LAWERENCE CREEK

2.0M S JCT USH 2, Iron, WI

Built 1924 Load: 29.2 t ADT: 38

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