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:

EDGEWOOD RD

Over: PRAIRIE CREEK & UP RR

082070704, Linn, IA

Built 2009 Load: 42.9 t ADT: 10,700

IA 1

Over: CEDAR RIVER

3.1 MI. S OF JCT. US 30, Linn, IA

Built 1992 Load: 44.1 t ADT: 5,600

FRANKLIN ST

Over: BRANCH BLUE CREEK

000000000, Linn, IA

Built 2019 Load: 44.1 t ADT: 5,513

SUTTON RD

Over: TRIB TO WALNUT CREEK

300 N, 200' E of 18-86-6, Linn, IA

Built 2015 Load: 44.1 t ADT: 79

EB US 30

Over: PLEASANT RUN

1.8 mi. W of Jct US 151, Linn, IA

Built 2002 Load: 44.5 t ADT: 11,750

CO HOME RD

Over: BIG CREEK

084051801, Linn, IA

Built 2006 Load: 46.0 t ADT: 1,935

CO HOME RD

Over: DRY CREEK

Cty Home Rd over Dry Cr, Linn, IA

Built 2010 Load: 46.0 t ADT: 6,285

SECRIST RD

Over: BIG CREEK

083050605, Linn, IA

Built 2005 Load: 46.7 t ADT: 1,660

BLOOMINGTON RD

Over: BIG CREEK

T83N R6W 23, Linn, IA

Built 2016 Load: 46.7 t ADT: 88

ROOSEVELT ST

Over: EAST OTTER CREEK

085072803, Linn, IA

Built 1999 Load: 48.0 t ADT: 471

WB US 30

Over: MORGAN CREEK

3.6 MI W OF JCT US 151, Linn, IA

Built 1992 Load: 48.0 t ADT: 7,700

CO HOME RD

Over: INDIAN CREEK

084060805, Linn, IA

Built 1993 Load: 48.3 t ADT: 5,794

27TH ST SW

Over: DRAINAGE

between 28th and 29th Ave, Linn, IA

Built 2016 Load: 49.2 t ADT: 1,310

80TH ST N.W.

Over: MORGAN CREEK

083082208, Linn, IA

Built 1992 Load: 49.8 t ADT: 295

E34(CO HOME RD)

Over: BERRYS RUN

East of N Marion Rd, Linn, IA

Built 2013 Load: 50.2 t ADT: 6,874

RAMP BR D-4

Over: CITY ST ROW

0.3 mi. N of Jct 922, Linn, IA

Built 1979 Load: 50.9 t ADT: 7,500

LAFAYETTE RD

Over: WEST OTTER CREEK

085082503, Linn, IA

Built 2007 Load: 52.9 t ADT: 246

44TH STREET

Over: WANATEE CREEK

084063200, Linn, IA

Built 2001 Load: 52.9 t ADT: 5,894

SECRIST RD

Over: SIMMONS CREEK

083050703, Linn, IA

Built 1989 Load: 55.3 t ADT: 1,660

SQUAW CR.RD.

Over: WANATEE CREEK

083062102, Linn, IA

Built 1999 Load: 57.3 t ADT: 618

ABBE HILLS RD

Over: TURTLE CREEK

082050303, Linn, IA

Built 1993 Load: 57.9 t ADT: 118

ABBE VIEW RD

Over: ABBE CREEK

082050507, Linn, IA

Built 2003 Load: 57.9 t ADT: 34

LIGHT RD

Over: WEST SPRING CREEK

082052201, Linn, IA

Built 2004 Load: 57.9 t ADT: 49

LIGHT RD

Over: SPRING CREEK

082052305, Linn, IA

Built 1998 Load: 57.9 t ADT: 79

STANDING ROCK R

Over: SPRING CREEK

082052308, Linn, IA

Built 1992 Load: 57.9 t ADT: 29

GREEN RIDGE RD

Over: SPRING CR

082052408, Linn, IA

Built 1998 Load: 57.9 t ADT: 128

IVANHOE RD

Over: DILLS RUN

082053004, Linn, IA

Built 2006 Load: 57.9 t ADT: 255

SAILOR RD

Over: TRIB TO CLEAR CREEK

082053505, Linn, IA

Built 2002 Load: 57.9 t ADT: 34

SMYTH RD

Over: ABBE CREEK

082060108, Linn, IA

Built 1998 Load: 57.9 t ADT: 98

SPANISH RD

Over: HOOSIER CREEK

082072502, Linn, IA

Built 2008 Load: 57.9 t ADT: 137

BEVERLY RD

Over: BOWLING BALL CR

082080207, Linn, IA

Built 2003 Load: 57.9 t ADT: 2,013

TISSEL HOLLOWRD

Over: TISSEL HOLLOW CREEK

000000000, Linn, IA

Built 2009 Load: 57.9 t ADT: 108

BOLTON MANOR RD

Over: SIMMONS CREEK

083050401, Linn, IA

Built 2002 Load: 57.9 t ADT: 70

PARALTA RD

Over: SIMMONS CREEK

083050511, Linn, IA

Built 1993 Load: 57.9 t ADT: 79

YEISLEY RD

Over: ELBOW CREEK

083051004, Linn, IA

Built 2000 Load: 57.9 t ADT: 29

LINN GROVE RD

Over: ELBOW CREEK

083051102, Linn, IA

Built 1990 Load: 57.9 t ADT: 88

ELBOW CR RD

Over: ELBOW CR

083051005, Linn, IA

Built 2000 Load: 57.9 t ADT: 78

HORN RD

Over: ALLEN CREEK

083053002, Linn, IA

Built 2003 Load: 57.9 t ADT: 39

BALLARD RD

Over: ALLEN CREEK

083053004, Linn, IA

Built 1994 Load: 57.9 t ADT: 59

YOUNG RD

Over: LONE TREE CR

083080508, Linn, IA

Built 2002 Load: 57.9 t ADT: 59

SUMMER ST

Over: CROWS CREEK

084051307, Linn, IA

Built 2005 Load: 57.9 t ADT: 29

ALDERMAN RD

Over: EAST BIG CREEK

084052202, Linn, IA

Built 1993 Load: 57.9 t ADT: 88

BURR OAKS RD

Over: BIG CREEK

084053005, Linn, IA

Built 2004 Load: 57.9 t ADT: 98

ALDERMAN RD

Over: SIMMENS CREEK

084053402, Linn, IA

Built 1996 Load: 57.9 t ADT: 33

AUSTIN RD

Over: INDAIN CREEK

084060505, Linn, IA

Built 1994 Load: 57.9 t ADT: 70

BIG SPRING RD

Over: CRABAPPLE CREEK

084062301, Linn, IA

Built 1994 Load: 57.9 t ADT: 25

RADIO RD

Over: CRABAPPLE CREEK

084062603, Linn, IA

Built 1995 Load: 57.9 t ADT: 69

JORDANS GRV RD

Over: CRABAPPLE

084062506, Linn, IA

Built 1998 Load: 57.9 t ADT: 246

OTTER RD

Over: WEST OTTER CREEK

084070702, Linn, IA

Built 2006 Load: 57.9 t ADT: 148

HOLLENBECK RD

Over: GANNON CREEK

084082906, Linn, IA

Built 1998 Load: 57.9 t ADT: 97

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 6, 2026