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)

US 30 WB

Good

Over: SPRING CREEK

3 Mi E of US30/IA1 INTCHG, Linn, IA

Built 2019 Load: 32.4 t ADT: 5,400

US 30 EB

Good

Over: SPRING CREEK

3 Mi E of US30/IA1 INTCHG, Linn, IA

Built 2019 Load: 32.4 t ADT: 5,400

IA 100 EB

Good

Over: MORGAN CREEK

0.1 mi N of SR E48 INTCHG, Linn, IA

Built 2016 Load: 32.4 t ADT: 1,640

IA 100 WB

Good

Over: MORGAN CREEK

0.1 MI N of SR E48 INTCHG, Linn, IA

Built 2016 Load: 32.4 t ADT: 1,640

IA 100 WB OFF RAMP

Good

Over: MORGAN CREEK

IA100 WB & SR E48 INTCHG, Linn, IA

Built 2016 Load: 32.4 t ADT: 1,530

IA 100 EB ON RAMP

Good

Over: MORGAN CREEK

IA100 EB & SR E48 INTCHG, Linn, IA

Built 2016 Load: 32.4 t ADT: 1,440

E 48 E AVE

Good

Over: MORGAN CREEK

IA100 & SR E48 INTCHG, Linn, IA

Built 2016 Load: 32.4 t ADT: 304

IA 1

Good

Over: ABBE CREEK

3.1 MI. N U.S. 30, Linn, IA

Built 2016 Load: 32.4 t ADT: 4,570

E.ROBINS RD

Good

Over: CHRISTOPHER CREEK

084072600, Linn, IA

Built 1985 Load: 32.7 t ADT: 5,794

COGGON RD

Good

Over: TRIB. TO WAPSI RIVER

086070305, Linn, IA

Built 1974 Load: 32.7 t ADT: 992

50TH STREET

Good

Over: WANATEE CREEK

084063300, Linn, IA

Built 1998 Load: 32.7 t ADT: 201

HUNTINGTON HILL RD

Good

Over: BERRY'S RUN

084061900, Linn, IA

Built 2002 Load: 32.7 t ADT: 128

29TH AVE

Good

Over: WANATEE CREEK

084063501, Linn, IA

Built 2011 Load: 32.7 t ADT: 6,593

29TH AVE

Good

Over: INDIAN CREEK

084063100, Linn, IA

Built 2008 Load: 33.9 t ADT: 7,094

NB I-380

Good

Over: EAST BLUE CREEK

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

Built 1982 Load: 34.1 t ADT: 10,750

E26 BURNETT STA RD

Good

Over: INDAIN CREEK

085062901, Linn, IA

Built 2021 Load: 34.3 t ADT: 520

US 151 & IA 13

Good

Over: OVER UP RR

1.2 MI. N of E Jct. US 30, Linn, IA

Built 1998 Load: 34.5 t ADT: 9,650

I 380 NB

Good

Over: WEST BLUE CREEK

2.7 mi. N of S.R. W36, Linn, IA

Built 1982 Load: 34.6 t ADT: 10,750

PALO MARSH RD

Good

Over: BEAR CREEK

084081604, Linn, IA

Built 1982 Load: 34.7 t ADT: 2,082

LEFEBURE RD

Good

Over: TRIB TO PRAIRIE CREEK

082081506, Linn, IA

Built 2022 Load: 35.6 t ADT: 648

EB COLL IA 100

Good

Over: OVER CC RR & BIKE PATH

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

Built 1982 Load: 35.6 t ADT: 2,140

NB US 151

Good

Over: BIG CREEK

4.7 mi. N of Jct. IA 13, Linn, IA

Built 1992 Load: 35.6 t ADT: 7,000

SB I-380

Good

Over: WEST BLUE CREEK

2.7 MI. N OF JCT SR W35, Linn, IA

Built 1982 Load: 35.8 t ADT: 10,750

EB IA 100

Good

Over: INDIAN CREEK

3.2 MI. W JCT. IA 13 &151, Linn, IA

Built 1995 Load: 35.9 t ADT: 11,050

CEDAR RIVER RD.

Good

Over: BALES BRANCH CR.

082051802, Linn, IA

Built 1983 Load: 36.0 t ADT: 1,738

SPRING CR.RD.

Good

Over: SPRING CREEK

082052806, Linn, IA

Built 1992 Load: 36.0 t ADT: 97

ELY RD

Good

Over: PLEASANT RUN CREEK

082071306, Linn, IA

Built 1958 Load: 36.0 t ADT: 5,008

SPRINGVILLE RD

Good

Over: ELBOW CREEK

083051602, Linn, IA

Built 1960 Load: 36.0 t ADT: 687

ELLIS RD

Good

Over: SILVER CREEK

083081605, Linn, IA

Built 1990 Load: 36.0 t ADT: 707

LOCAL

Good

Over: SILVER CREEK

083081704, Linn, IA

Built 1991 Load: 36.0 t ADT: 108

HODGIN RD

Good

Over: TRIB E BIG CREEK

084052101, Linn, IA

Built 1986 Load: 36.0 t ADT: 49

TOWER TER.RD.

Good

Over: TRIB. OTTER CREEK

084082417, Linn, IA

Built 1985 Load: 36.0 t ADT: 1,777

WAUBEEK RD

Good

Over: RICOCHET CREEK

085062405, Linn, IA

Built 2001 Load: 36.0 t ADT: 373

E OTTER RD

Good

Over: EAST OTTER CREEK

085072809, Linn, IA

Built 1978 Load: 36.0 t ADT: 108

I 380 NB

Good

Over: EAST OTTER CREEK

1.3 MI. N of Jct. SR E34, Linn, IA

Built 1983 Load: 36.3 t ADT: 12,850

IA 100 WB

Good

Over: INDIAN CREEK

3.2 MI W OFJCT US151/IA13, Linn, IA

Built 1995 Load: 36.3 t ADT: 11,050

SB I-380

Good

Over: WEST OTTER CREEK

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

Built 1983 Load: 37.6 t ADT: 12,850

BIG SPRINGS RD

Good

Over: TRIB TO INDIAN CREEK

084062100, Linn, IA

Built 2003 Load: 37.8 t ADT: 20

US 151

Good

Over: DRAINAGE DITCH #2

0.6 MI. SOUTH OF US 30, Linn, IA

Built 2020 Load: 38.9 t ADT: 9,900

NB US 151

Good

Over: BIG CREEK

1.9 mi. N of Jct. SR X20, Linn, IA

Built 1992 Load: 39.2 t ADT: 6,500

E16 CENTRALCITYRD

Good

Over: WEST OTTER CREEK

085070701, Linn, IA

Built 2020 Load: 39.9 t ADT: 1,011

D62 SPENCERS GROVE

Good

Over: SMALL NATURAL STREAM

T86N, R08W, 7, Linn, IA

Built 2018 Load: 40.8 t ADT: 707

EDGEWOOD RD

Good

Over: CRANDIC RR

082070704, Linn, IA

Built 2009 Load: 40.8 t ADT: 10,700

IA 13

Good

Over: BUFFALO CREEK

0.1 mi. N of S Jct SR D62, Linn, IA

Built 1976 Load: 41.1 t ADT: 4,970

US 151 & IA 13

Good

Over: BIG CREEK

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

Built 1998 Load: 41.5 t ADT: 9,650

CO HOME RD

Good

Over: CRAPAPPLE CREEK

084061401, Linn, IA

Built 2006 Load: 41.8 t ADT: 1,935

HAGERMAN RD

Good

Over: W OTTER CREEK

084080103, Linn, IA

Built 1983 Load: 42.1 t ADT: 137

NEWBOLD RD

Good

Over: E BLUE CREEK

T85N, R08W, SECTION 4, Linn, IA

Built 2017 Load: 42.3 t ADT: 49

OAK DRIVE

Good

Over: INDIAN CREEK

083063010, Linn, IA

Built 2023 Load: 42.4 t

E16 SAWYER RD

Good

Over: HEATON CREEK

T85N, R06W, 2, Linn, IA

Built 2018 Load: 42.4 t ADT: 1,768

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