Portage County, WI

192 public highway bridges

Portage County Bridge Snapshot

Portage County, Wisconsin contains 192 public highway bridges in the FHWA National Bridge Inventory. Roughly 31.8% are rated “Good,” 34.4% “Fair,” 3.1% “Poor,” and 3.1% 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.

192

Total Bridges

31.8%

Good

3.1%

Poor

3.1%

Structurally Deficient

Condition Distribution

Good

31.8% (61)

Fair

34.4% (66)

Poor

3.1% (6)

SD

3.1% (6)

All Bridges (192)

Sort:

USH STH 54-USH B51

Over: IH USH 51-IH 39

8.3M N JCT CTH W, Portage, WI

Built 1969 ADT: 14,100

IH USH51-IH39NB

Over: CTH B

1.2M E JCT STH 54, Portage, WI

Built 1969 ADT: 18,408

IH USH51-IH39SB

Over: CTH B

1.2M E JCT STH 54, Portage, WI

Built 1969 ADT: 18,408

CTH HH

Over: IH USH 51-IH 39

4.8M N JCT STH 54 TO E, Portage, WI

Built 1969 ADT: 22,100

USH 10

Over: IH USH 51-IH 39

6.7M N JCT STH 54 TO E, Portage, WI

Built 1968 ADT: 34,605

LRD BARBARAS LANE

Over: IH USH 51-IH 39

0.5M N JCT USH 10 TO E, Portage, WI

Built 1968 ADT: 33,800

IH USH51-IH39NB

Over: STH 66

1.8M E JCT USH 10, Portage, WI

Built 1968 ADT: 11,000

IH USH51-IH39SB

Over: STH 66

1.7M E JCT USH 10, Portage, WI

Built 1968 ADT: 11,000

IH RAMP DIVISION S

Over: IH USH 51-IH 39

2.0M N JCT STH 66 TO E, Portage, WI

Built 1969 ADT: 29,800

LRD N 2ND ST

Over: IH USH 51-IH 39

0.3M N JCT USH B51 TO S, Portage, WI

Built 1969 ADT: 29,800

LRD WILSHIRE BLVD

Over: IH USH 51-IH 39

0.5M N JCT STH 66 TO E, Portage, WI

Built 1969 ADT: 26,400

CTH D

Over: IH USH 51-IH 39

3.0M N JCT STH 73, Portage, WI

Built 1980 ADT: 13,000

LRD 3RD AVE

Over: IH USH 51-IH 39

2.0M N JCT CTH D, Portage, WI

Built 1980 ADT: 13,000

CTH W

Over: IH USH 51-IH 39

3.5M N JCT CTH D, Portage, WI

Built 1979 ADT: 13,000

LRD CODDINGTON RD

Over: IH USH 51-IH 39

4.0M N JCT CTH W, Portage, WI

Built 1978 ADT: 14,600

LRD BIRCH DR

Over: IH USH 51-IH 39

7.3M N JCT CTH W, Portage, WI

Built 1978 ADT: 14,600

LRD CASMIR RD

Over: IH USH 51-IH 39

1.7M N JCT USH B51 TO S, Portage, WI

Built 1972 ADT: 29,800

CTH X

Over: IH USH 51-IH 39

3.6M N JCT USH B51 TO S, Portage, WI

Built 1971 ADT: 21,500

LRD MAPLE DR

Over: IH USH 51-IH 39

2.6M N JCT CTH X TO E, Portage, WI

Built 1971 ADT: 21,500

CTH DB

Over: IH USH 51-IH 39

6.0M N JCT CTH X TO E, Portage, WI

Built 1972 ADT: 22,800

SOO LINE

Over: LRD MICHIGAN AVE

0.6M S JCT USH 10 TO E, Portage, WI

Built 1981 ADT: 7,850

CTH J NB

Over: USH 10

6.9M E JCT USH 51, Portage, WI

Built 2001 ADT: 17,200

CTH J SB

Over: USH 10

6.8M E JCT USH 51, Portage, WI

Built 2001 ADT: 17,200

USH 10 EB

Over: CTH A/ CTH B EAST

AT USH10, Portage, WI

Built 2004 ADT: 1,200

USH 10 WB

Over: CTH A (CTH B EAST)

AT USH10, Portage, WI

Built 2004 ADT: 1,200

USH10 EB

Over: CTH Q

AT USH10, Portage, WI

Built 2004 ADT: 500

USH 10 WB

Over: CTH Q

AT USH10, Portage, WI

Built 2004 ADT: 500

USH 10 EB

Over: CTH B

AT USH 10, Portage, WI

Built 2004 ADT: 2,400

USH 10 WB

Over: CTH B

AT USH 10, Portage, WI

Built 2004 ADT: 1,200

USH 10 EB

Over: LRD LAKE EMILY RD

AT USH 10, Portage, WI

Built 2004 ADT: 650

USH 10 WB

Over: LRD LAKE EMILY RD

AT USH 10, Portage, WI

Built 2004 ADT: 650

USH 10 EB

Over: LRD LAKE RD

AT USH 10, Portage, WI

Built 2004 ADT: 880

USH 10 WB

Over: LRD LAKE RD

AT USH 10, Portage, WI

Built 2004 ADT: 880

USH 10 EB

Over: WISCONSIN RIVER / RIVER

LOCATION UNKNOWN, PLEASE, Portage, WI

Built 2008 ADT: 99

USH 10 WB

Over: WISCONSIN RIVER / RIVER

1 MI E JCT CTH E, Portage, WI

Built 2008 ADT: 99

IH 10EB RAMP TO I-

Over: LRD SCENIC DRIVE N

AT USH 10, Portage, WI

Built 2008 ADT: 200

IH USH10 EB RAMP T

Over: LRD SCENIC DRIVE

AT USH 10, Portage, WI

Built 2009 ADT: 200

IH I39 SB RAMP TO

Over: LRD SCENIC DRIVE

AT IH39, Portage, WI

Built 2009 ADT: 200

IH USH10 EB RAMP T

Over: IH 39

AT USH10, Portage, WI

Built 2008 ADT: 28,600

IH39 NB RAMP TO US

Over: CTH X

XING OF IH39, Portage, WI

Built 2009 ADT: 500

STH 13/34 S OVER U

Over: USH10 E

UNDER STH 34, Portage, WI

Built 2011 ADT: 8,400

USH 10 WB

Over: CTH G

AT INTERSECTION, Portage, WI

Built 2011 ADT: 650

USH 10 EB

Over: CTH G

AT USH10, Portage, WI

Built 2011 ADT: 650

CTH O

Over: USH10

UNDER CTH "O", Portage, WI

Built 2010 ADT: 7,300

USH 10 EB

Over: STH 34

AT XING OF USH10, Portage, WI

Built 2009 ADT: 2,400

USH 10WB

Over: STH 34

AT USH10, Portage, WI

Built 2009 ADT: 2,400

USH 10 EB

Over: CTH E

AT USH10, Portage, WI

Built 2009 ADT: 700

USH 10 WB

Over: CTH E

AT USH10, Portage, WI

Built 2009 ADT: 700

LRD PORTER ROAD

Over: IH39N-USH51NB

AT PORTER ROA, Portage, WI

Built 2009 ADT: 22,100

IH 39 NB/USH 51 NB

Over: LRD RESERVE ST

1.5M N JCT STH 66, Portage, WI

Built 2015 ADT: 1,600

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026