Linn County, IA

428 public highway bridges

Linn County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Linn County, Iowa contains 428 public highway bridges. Roughly 40% are rated “Good,” 33.6% “Fair,” and 4.7% “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.

428

Total Bridges

40%

Good

33.6%

Fair

4.7%

Poor Condition

Condition Distribution

Good

40% (171)

Fair

33.6% (144)

Poor

4.7% (20)

All Bridges (428)

Sort:

44TH STREET

Over: WANATEE CREEK

083060500, Linn, IA

Built 1980 Load: 32.7 t ADT: 8,192

8TH AVENUE

Over: WANATEE CREEK

083060400, Linn, IA

Built 2003 Load: 32.7 t ADT: 510

BOYSON RD

Over: TRIBUTARY OF DRY CREEK

084073500, Linn, IA

Built 1976 Load: 32.7 t ADT: 13,287

SB I-380

Over: CC RR & ASH PIT

2.9 MI. S OF JCT. 100, Linn, IA

Built 1979 Load: 32.7 t ADT: 41,000

SE RAMP I-380

Over: OVER CC RR & TRAIL

0.2 mi. S of Jct. IA 100, Linn, IA

Built 1982 Load: 32.7 t ADT: 7,700

US 151

Over: CREEK

2.5 MI. S OF JCT. IA 100, Linn, IA

Built 1960 Load: 32.7 t ADT: 22,400

I 380 SB

Over: EAST BLUE CREEK

2.3 mi. N of Jct. SR W35, Linn, IA

Built 1982 Load: 32.9 t ADT: 10,750

E CEMETERY RD

Over: TRIB TO PRAIRIE CREEK

082081111, Linn, IA

Built 1981 Load: 33.0 t ADT: 187

OTIS RD

Over: INDIAN CREEK

083063017, Linn, IA

Built 2006 Load: 33.0 t ADT: 353

PRAIRIEBURG RD

Over: BUFFALO CREEK

085050306, Linn, IA

Built 1974 Load: 33.5 t ADT: 520

BLAIRS FERRY RD

Over: RED CEDAR RIVER

084082105, Linn, IA

Built 1984 Load: 33.7 t ADT: 4,419

BLAIRS FERRY RD

Over: MUD LAKE

084082205, Linn, IA

Built 1984 Load: 33.7 t ADT: 4,419

NB I-380

Over: CC RR & ASH PIT

2.9 MI. S OF JCT. IA 100, Linn, IA

Built 1979 Load: 33.9 t ADT: 32,300

BLAIRSFERRY RD

Over: OTTER CREEK

084082604, Linn, IA

Built 1971 Load: 34.3 t ADT: 5,401

WB US 30

Over: CEDAR RIVER

0.5 mi. W of E Jct US 151, Linn, IA

Built 1975 Load: 34.5 t ADT: 11,750

BOYSCOUTS RD

Over: WAPSIPINICON RIVER

085052003, Linn, IA

Built 1976 Load: 34.7 t ADT: 226

LEWIS ACCESS RD

Over: CEDAR RIVER

085082004, Linn, IA

Built 1961 Load: 35.6 t ADT: 1,866

EB US 30

Over: OVER CIC RR SPUR

0.8 mi. W of E Jct US 218, Linn, IA

Built 1980 Load: 35.6 t ADT: 15,750

33RD AVE

Over: CRANDIC RR

000000000, Linn, IA

Built 2006 Load: 35.8 t ADT: 10,700

SUTLIFF RD

Over: SPRING CREEK

082052404, Linn, IA

Built 1962 Load: 36.0 t ADT: 610

SAWYER RD

Over: SAWYER CREEK

085060105, Linn, IA

Built 1925 Load: 36.0 t ADT: 1,100

MONTICELLO RD

Over: TRIB BOULDER CR

086050901, Linn, IA

Built 1960 Load: 36.0 t ADT: 530

TROY MILLS RD

Over: TRIB.TO WAPSIPINICON R

086071704, Linn, IA

Built 1925 Load: 36.0 t ADT: 1,424

NB IA 13

Over: EAST INDIAN CREEK

2.1 mi. N of Jct. SR E34, Linn, IA

Built 1973 Load: 36.2 t ADT: 3,600

ELY RD

Over: ABANDONED RR

082071101, Linn, IA

Built 1976 Load: 36.3 t ADT: 5,095

SAWYER RD

Over: BUFFALO CREEK

085050505, Linn, IA

Built 1973 Load: 36.3 t ADT: 1,100

NB I-380

Over: WEST OTTER CREEK

2.7 mi. N of jct. SR E34, Linn, IA

Built 1983 Load: 36.3 t ADT: 12,850

ARTESIAN RD

Over: INDIAN CREEK

084062000, Linn, IA

Built 1999 Load: 36.7 t ADT: 60

WRIGHT BROS BLV

Over: HOOSIER CREEK

082072603, Linn, IA

Built 1985 Load: 37.4 t ADT: 1,728

MILLER ROAD

Over: TOWER CREEK

000000000, Linn, IA

Built 1996 Load: 37.6 t ADT: 2,740

WINSLOW RD

Over: TRIB INDIAN CREEK

084061900, Linn, IA

Built 1999 Load: 37.8 t ADT: 1,129

I 380 SB

Over: EAST OTTER CREEK

1.3 MI. N S.R. E34, Linn, IA

Built 1983 Load: 38.0 t ADT: 12,850

EB US 30

Over: OVER CIC RR

0.8 MI. W OF JCT. I-380, Linn, IA

Built 1979 Load: 38.8 t ADT: 15,750

WB US 30

Over: OVER CIC RR SPUR

0.8 mi. W of E Jct US 218, Linn, IA

Built 1980 Load: 39.0 t ADT: 15,750

FRONT DR.

Over: OTTER CREEK

084081233, Linn, IA

Built 1990 Load: 39.5 t ADT: 923

WB COLL IA 100

Over: OVER CC RR & BIKE TRAIL

0.1 MI. N OF JCT. IA #100, Linn, IA

Built 1982 Load: 41.3 t ADT: 10,300

URBANA RD

Over: WEST BLUE CREEK

085080607, Linn, IA

Built 1987 Load: 41.5 t ADT: 1,257

MARTELLE RD

Over: ELBOW CREEK

083051201, Linn, IA

Built 1977 Load: 44.6 t ADT: 363

JAPPA RD.

Over: PLEASANT RUN

082060806, Linn, IA

Built 1997 Load: 45.4 t ADT: 1,061

UPPR BOULDER RD

Over: BOULDER CREEK

086051601, Linn, IA

Built 1992 Load: 46.2 t ADT: 20

WB US 30

Over: PLEASANT RUN

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

Built 1975 Load: 46.9 t ADT: 11,750

SB US 151

Over: CRAB APPLE CREEK

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

Built 1992 Load: 47.4 t ADT: 7,000

BOYSON RD

Over: DRY CREEK

000000000, Linn, IA

Built 2000 Load: 48.3 t ADT: 14,100

FIRST ST

Over: UP RR

Mt Vernon Road, Linn, IA

Built 1934 Load: 48.9 t ADT: 2,532

INDIAN BR.RD.

Over: INDAIN CREEK

085063201, Linn, IA

Built 1997 Load: 49.9 t ADT: 33

SB IA 13

Over: OVER CC RR

0.4 MI S OF S JCT. SR E16, Linn, IA

Built 1973 Load: 51.4 t ADT: 3,600

TODD HILLS RD

Over: OTTER CREEK

084082403, Linn, IA

Built 1997 Load: 52.4 t ADT: 59

ELLIS RD

Over: MORGAN CREEK

083081405, Linn, IA

Built 1996 Load: 52.9 t ADT: 1,403

C AVE N.E.

Over: DRY CREEK

084071510, Linn, IA

Built 1992 Load: 52.9 t ADT: 1,453

LINN-BENTON RD.

Over: MORGAN CREEK

082080602, Linn, IA

Built 1993 Load: 57.3 t ADT: 147

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

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Compiled by PlainBridges, Independent data publisher

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.