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:

WB 15TH AVE

Over: UP RR & STREET

000000000, Linn, IA

Built 1983 ADT: 1,375

TOWER TERRACE EB

Over: I 380

2.4 mi. S Jct. SR E34, Linn, IA

E-34 -TODDVILLE

Over: I 380

AT JCT. SR E34, Linn, IA

Built 1983 ADT: 24,100

MIDWAY RD

Over: I-380

0.9 mi. north of SR E34, Linn, IA

Built 1983 ADT: 25,900

HAGERMAN RD

Over: I-380

2.3 MI. N OF SR E34, Linn, IA

Built 1983 ADT: 25,900

QUAIL RIDGE RD

Over: I-380

3.0 MI. S OF SR W36, Linn, IA

Built 1983 ADT: 25,900

BOAR RD

Over: I-380

1.6 MI. S OF S.R. W36, Linn, IA

Built 1983 ADT: 25,900

SR W-36

Over: I-380

AT JCT. S.R. W36, Linn, IA

Built 1983 ADT: 19,900

CEDAR RIDGE RD

Over: I-380

1.5 mi. N of jct. SR W36, Linn, IA

Built 1982 ADT: 22,200

SR E2W

Over: I-380

3.6 MI. N OF SR W36, Linn, IA

Built 1984 ADT: 22,200

STONEY POINT RD

Over: US 30 & US 218

0.8 MI. W OF JCT. US 151, Linn, IA

Built 1985 ADT: 16,100

W42 80TH ST SW

Over: US 30

80TH ST. SW OVER US 30, Linn, IA

Built 2018 ADT: 13,100

RAMP B TO 16TH

Over: US 30

2.5 MI. W OF JCT. US 151, Linn, IA

Built 1985 ADT: 12,000

I 380 NB OFF RAMP

Over: 8TH AVE SW

0.5 mi. S Jct. IA 922, Linn, IA

Built 1975 ADT: 8,730

I 380 NB

Over: US 30

AT THE JCT. U.S. 30, Linn, IA

Built 1975 ADT: 11,250

I 380 SB

Over: US 30

AT JCT. OF U.S. 30, Linn, IA

Built 1975 ADT: 11,050

27TH AVE

Over: I-380

1.7 mi. N of Jct. US 30, Linn, IA

Built 1975 ADT: 65,300

WILSON AVE

Over: I-380

2.1 MI. N OF JCT. 30, Linn, IA

Built 1972 ADT: 59,600

76TH AVE SW

Over: I-380

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

Built 1975 ADT: 56,400

I 380 NB

Over: 15TH & 16TH AV SW

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

Built 1975 ADT: 2,800

I 380 SB

Over: 15TH & 16TH AVE SW

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

Built 1975 ADT: 2,800

NB I-380

Over: CIC RR & 8TH AVE

0.8 mi. S of Jct. IA #922, Linn, IA

Built 1973 ADT: 4,365

I 380 SB

Over: CIC RR & 8TH AVE

0.8 mi. S of Jct. IA #922, Linn, IA

Built 1975 ADT: 3,010

NB I-380

Over: 5TH AVE SW

0.3 mi. S of Jct. IA 922, Linn, IA

Built 1975 ADT: 1,710

SB I-380

Over: 5TH AVE SW

0.3 mi. S of IA 922, Linn, IA

Built 1975 ADT: 1,710

IA 100 EB

Over: OLD FERRY RD

1.0 MI NW OF JCT CR W36, Linn, IA

Built 2016 ADT: 25

EDGEWOOD RD

Over: IA 100

EDGEWOOD ROAD OVER IA 100, Linn, IA

Built 2016 ADT: 6,100

US 30 WB

Over: WILLOW CREEK ROAD

0.9 MI W US30/IA1 INTCHG, Linn, IA

Built 2018 ADT: 20

US 30 WB

Over: IA 1

US 30 and IA 1 INTCHG, Linn, IA

Built 2019 ADT: 4,000

US 30 EB

Over: IA 1

US 30 and IA 1 INTCHG, Linn, IA

Built 2019 ADT: 4,000

STANDING ROCK ROAD

Over: US 30

1.6 mi E IA1/US30 Intrchg, Linn, IA

Built 2018 ADT: 5,400

SUTLIFF RD

Over: US 30

2.3MI. E of IA1 and US30, Linn, IA

Built 2017 ADT: 5,400

GREEN RIDGE ROAD

Over: US 30

2.8 Mi. E of Jct. IA 1, Linn, IA

Built 2018 ADT: 5,400

LISBON BOULEVARD

Over: US 30

3.5 mi. E US30/IA1 INTCHG, Linn, IA

Built 2019 ADT: 4,370

IA 100 EB

Over: US 30WB/US 218NB ON RAMP

US 30 RAMP D, Linn, IA

Built 2018 ADT: 2,110

IA 100 WB

Over: US 30

US 30 RAMP H, Linn, IA

Built 2018 ADT: 13,100

IA 100WB TO US30EB

Over: US 30 EB TO IA 100 EB

1 mi S IA100/SR E48 INTCH, Linn, IA

Built 2018 ADT: 1,000

IA 100 EB

Over: 16TH AVE ACCESS

IA-100/US-30 INTERCHANGE, Linn, IA

Built 2017 ADT: 18

IA 100 WB

Over: 16TH AVE ACCESS RD

IA-100/US-30 INTERCHANGE, Linn, IA

Built 2017 ADT: 18

E 48 E AVE

Over: IA 100

IA100 & SR E48 INTCHG., Linn, IA

Built 2018 ADT: 3,300

IA 100 EB

Over: ELLIS RD SILVER CREEK

2.8 Mi. N of US 218/30, Linn, IA

Built 2016 ADT: 360

IA 100 WB

Over: ELLIS RD SILVER CREEK

2.8 Mi. N of US 218/30, Linn, IA

Built 2016 ADT: 360

TOWER TERRACE WB

Over: I 380

2.4 mi. S Jct. SR E34, Linn, IA

CUMMINGS FD.RD.

Over: W OTTER CR

085082411, Linn, IA

Built 1956 Load: 13.4 t ADT: 70

DUROW RD

Over: BLUE CREEK

086083105, Linn, IA

Built 1951 Load: 15.9 t ADT: 148

LINN-BENTON RD

Over: BEAR CR

084081804, Linn, IA

Built 1948 Load: 17.1 t ADT: 196

US 30

Over: STREAM

2.5 mi. W of Jct. IA #1, Linn, IA

Built 1951 Load: 18.1 t ADT: 12,000

COVINGTON RD

Over: SILVER CREEK

083081014, Linn, IA

Built 1955 Load: 19.1 t ADT: 5,696

29TH ST DR SE

Over: INDIAN CREEK

000000000, Linn, IA

Built 1972 Load: 19.9 t ADT: 5,800

RED HAW RD

Over: BIG CR

083061404, Linn, IA

Built 1959 Load: 21.7 t ADT: 69

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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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.