Linn County, IA

428 public highway bridges

Linn County Bridge Snapshot

Linn County, Iowa contains 428 public highway bridges in the FHWA National Bridge Inventory. Roughly 40% are rated “Good,” 33.6% “Fair,” 4.7% “Poor,” and 4.7% 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 IA 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.

428

Total Bridges

40%

Good

4.7%

Poor

4.7%

Structurally Deficient

Condition Distribution

Good

40% (171)

Fair

33.6% (144)

Poor

4.7% (20)

SD

4.7% (20)

All Bridges (428)

Sort:

AUSTIN RD

Over: BIG CR

084050601, Linn, IA

Built 1977 Load: 57.3 t ADT: 49

HENIK RD

Over: TRIB TO CEDAR RIVER

082051705, Linn, IA

Built 1998 Load: 57.9 t ADT: 78

MC CLELLAND RD

Over: SPRING CR

082052304, Linn, IA

Built 2002 Load: 57.9 t ADT: 29

MARION AIRPT RD

Over: CRABAPPLE CREEK

083060107, Linn, IA

Built 1992 Load: 57.9 t ADT: 70

O CONNER RD

Over: ALLEN CREEK

083062604, Linn, IA

Built 1990 Load: 57.9 t ADT: 59

SISLEY GROVE RD

Over: MORGAN CREEK

083083204, Linn, IA

Built 1994 Load: 57.9 t ADT: 33

WHITE RD

Over: DRY CR

084070203, Linn, IA

Built 1989 Load: 57.9 t ADT: 20

HORSESHOE LK RD

Over: TRIB TO CEDAR RIVER

084081404, Linn, IA

Built 1975 Load: 57.9 t ADT: 20

LINN-BENTON RD

Over: LITTLE GANNON CK

084083004, Linn, IA

Built 1992 Load: 57.9 t ADT: 88

MAXWELL RD

Over: TRIB WAPSIPINICON R

085050803, Linn, IA

Built 1998 Load: 57.9 t ADT: 78

GAME CLUB RD

Over: HEATONS CREEK

085061201, Linn, IA

Built 1999 Load: 57.9 t ADT: 78

SUTTON RD

Over: INDIAN CREEK

085061904, Linn, IA

Built 2002 Load: 57.9 t ADT: 78

LILLIE RD.

Over: INDIAN CREEK

085063204, Linn, IA

Built 1996 Load: 57.9 t ADT: 20

IOWA RD

Over: W OTTER CR,TRIB. TO

085070703, Linn, IA

Built 1977 Load: 57.9 t ADT: 20

IOWA RD

Over: W OTTER CREEK

085070703, Linn, IA

Built 1996 Load: 57.9 t ADT: 20

FISHEL RD

Over: E OTTER CREEK

085073307, Linn, IA

Built 2004 Load: 57.9 t ADT: 33

INDIAN BOUND.RD

Over: TRIB CEDAR R

085081704, Linn, IA

Built 1997 Load: 57.9 t ADT: 137

RED BRIDGE RD

Over: BOULDER CREEK

086052003, Linn, IA

Built 2003 Load: 57.9 t ADT: 20

LINN-DELA RD

Over: BUFFALO CREEK

086060401, Linn, IA

Built 2000 Load: 57.9 t ADT: 97

NUGENTS RD

Over: BUFFALO CREEK

42.26679783, -91.50518462, Linn, IA

Built 2015 Load: 57.9 t ADT: 49

SEVEN HILLS RD

Over: WASTON CREEK

086061901, Linn, IA

Built 2004 Load: 57.9 t ADT: 49

RED SCHOOL RD

Over: HEATONS CREEK

086062604, Linn, IA

Built 1996 Load: 57.9 t ADT: 29

SUTTONRD.

Over: JUSTINS CREEK

086062902, Linn, IA

Built 1998 Load: 57.9 t ADT: 59

BLODGETT RD

Over: TRIB TO JUSTINS CREEK

086063007, Linn, IA

Built 2005 Load: 57.9 t ADT: 29

LINN BUCHAN RD

Over: WALTONS CREEK

086070101, Linn, IA

Built 1990 Load: 57.9 t ADT: 29

BETTYS GROVE RD

Over: EAST BLUE CREEK

086081006, Linn, IA

Built 1988 Load: 57.9 t ADT: 128

WILEY RD

Over: E. BLUE CREEK

086082103, Linn, IA

Built 1990 Load: 57.9 t ADT: 128

LOCAL

Over: CATTLE RUN CREEK

082053503, Linn, IA

Built 1993 Load: 57.9 t ADT: 71

E. OTTER RE.

Over: WEASEL CREEK

084070504, Linn, IA

Built 1997 Load: 57.9 t ADT: 69

BARRET RD

Over: EAST INDIAN CREEK

085063404, Linn, IA

Built 2000 Load: 57.9 t ADT: 10

HUTCHINSON RD

Over: HEATON CREEK

086061601, Linn, IA

Built 2012 Load: 57.9 t ADT: 108

VALLEY FARM RD

Over: HEATONS CREEK

086061604, Linn, IA

Built 2012 Load: 57.9 t ADT: 98

ROGERS CR RD

Over: ROGERS CR

000000000, Linn, IA

Built 1989 Load: 58.0 t ADT: 94

JORDANS GROV RD

Over: HEATONS CREEK

085060104, Linn, IA

Built 2002 Load: 58.3 t ADT: 442

NO MARION RD

Over: JUSTINS CREEK

086063004, Linn, IA

Built 1997 Load: 99.9 t ADT: 29

BLUE CREEK RD

Over: TRIBUTE WEST BLUE CREEK

086083110, Linn, IA

Built 2007 Load: 99.9 t ADT: 39

US 30,151,& 218

Over: CREEK

0.1 MI. W OF E JCT. 218, Linn, IA

Built 1975 Load: 99.9 t ADT: 28,500

BUSINESS 30

Over: SPRING CREEK

0.13miEjctBus30&LisbonBlV, Linn, IA

Built 1951 Load: 17.0 t ADT: 1,895

ABBE HILLS RD

Over: STREAM

2T82NR5W, Linn, IA

Built 2016 Load: 23.0 t ADT: 108

E AVE NW

Over: STREAM

083073001, Linn, IA

Built 1900 Load: 24.5 t ADT: 3,596

33RD AVE SW

Over: UP AND CRANDIC RR

000000000, Linn, IA

Built 2006 Load: 28.1 t ADT: 10,700

DEAN RD

Over: TRIB TO PRAIRIE CREEK

000000000, Linn, IA

Built 2009 Load: 28.6 t ADT: 2,541

SB I-380

Over: OVER UP RR

1.0 MI. N OF JCT. US 30, Linn, IA

Built 1974 Load: 28.8 t ADT: 31,400

TOWER TERR.RD.

Over: OTTER CREEK

084082409, Linn, IA

Built 1984 Load: 29.0 t ADT: 1,237

JORDANS GROVE RD

Over: WAPSIPINICON RIVER

085061302, Linn, IA

Built 2020 Load: 29.2 t ADT: 371

NB IA 13

Over: OVER CC RR

0.4 MI. S OF SR E16, Linn, IA

Built 1973 Load: 31.7 t ADT: 3,600

US 151 NB

Over: CRAB APPLE CREEK

2.9 MI. N OF N JCT. IA 13, Linn, IA

Built 2021 Load: 32.4 t ADT: 7,000

US 151

Over: PRAIRIE CREEK

3 mi. S of US 30 JCT., Linn, IA

Built 2021 Load: 32.4 t ADT: 7,800

SHAVER RD NE

Over: MCCLOUD RUN

083071600, Linn, IA

Built 2023 Load: 32.4 t ADT: 2,450

IA 100

Over: CEDAR RIVER & IANR RR

1.7 Mi. NE of E36, Linn, IA

Built 2016 Load: 32.4 t ADT: 11,500

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

Related

Browse all → | Rankings →

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 6, 2026