Iron County, WI

52 public highway bridges

Iron County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Iron County, Wisconsin contains 52 public highway bridges. Roughly 51.9% are rated “Good,” 32.7% “Fair,” and 7.7% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

52
Total Bridges
51.9%
Good
32.7%
Fair
7.7%
Poor Condition

Condition Distribution

Good
51.9% (27)
Fair
32.7% (17)
Poor
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

LRD TOWN PARK DR (

Poor

Over: W BR MONTREAL RIVER

0.6M S JCT USH 2, Iron, WI

Built 1957 Load: 6.5 t ADT: 1

IRR BIA RTE 10

Poor

Over: FLAMBEAU BEAR RIVER

6KM NW OF LAC DU FLAMBEAU, Iron, WI

Built 1932 Load: 17.8 t ADT: 50

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.