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:

16TH AVE EB

Over: UP RR & STREET

C65750560, Linn, IA

Built 1937 ADT: 1,795

12TH AVE

Over: CEDAR RIVER & RD

083072812, Linn, IA

Built 1974 ADT: 650

A AVE

Over: 4TH ST & RR

000000000, Linn, IA

Built 1974 ADT: 2,160

WRIGHT BROS BLV

Over: I-380

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

Built 1971 ADT: 45,700

WALFORD RD.

Over: I 380

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

Built 1971 ADT: 52,700

I 380 RAMP

Over: RAMP F OVER I-380

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

Built 1975 ADT: 41,800

NB I-380

Over: CIC RR & CITY ST

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

Built 1975 ADT: 815

SB I-380

Over: CIC RR & CITY ST

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

Built 1975 ADT: 1,315

6TH ST.SW.

Over: US 30

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

Built 1975 ADT: 25,800

KIRKWOOD BLVD

Over: US 30

0.7 mi. E of jct. US 218, Linn, IA

Built 1975 ADT: 31,900

J ST

Over: US 30

0.2 MI. E OF JCT. I-380, Linn, IA

Built 1975 ADT: 22,500

I-380 RAMP F EB

Over: US 30 & 151

0.3 MI. E OF JCT. 380, Linn, IA

Built 1975 ADT: 22,500

EB RAMP F

Over: J STREET SW

0.2 MI. E OF US 30/I-380, Linn, IA

Built 1975 ADT: 4,240

30 W TO 380 N RAMP

Over: J ST SW

0.4 MI. E OF JCT. 30/380, Linn, IA

Built 1975 ADT: 4,240

C STREET

Over: US 30

1.6 MI. E OF JCT. I-380, Linn, IA

Built 1976 ADT: 17,300

NB I 380

Over: 33RD AVE

1.3 mi. N of Jct. U.S. 30, Linn, IA

Built 1974 ADT: 3,550

SB I-380

Over: 33RD AVE

1.3 mi. N of Jct. U.S. 30, Linn, IA

Built 1974 ADT: 3,550

I 380 NB

Over: IA 922

AT JCT. BUS. U.S. 151, Linn, IA

Built 1979 ADT: 8,450

I 380 SB

Over: IA 922

AT JCT. BUS. U.S. 151, Linn, IA

Built 1979 ADT: 860

NB I-380

Over: CITY STREETS AND RR

0.6 MI. N OF JCT. IA 922, Linn, IA

Built 1979 ADT: 985

SB I-380

Over: CITY STREETS & RR

0.6 MI. N OF JCT. IA 922, Linn, IA

Built 1979 ADT: 150

I-380

Over: E AND F AVE NW CEDAR RVR

0.3 mi N. US 151(1st Ave), Linn, IA

Built 1979 ADT: 6,900

7TH ST NE

Over: I-380

0.9 MI. N OF Jct. IA #922, Linn, IA

Built 1972 ADT: 64,500

8TH ST NE

Over: I-380

1.1 mi. N Jct. IA 922, Linn, IA

Built 1972 ADT: 64,500

I 380 NB OFF RAMP

Over: 3RD ST NW

0.1 MI. N OF JCT. US 151, Linn, IA

Built 1979 ADT: 1,140

RAMP BR D-3

Over: CITY ST R.O.W

0.2 MI. N OF JCT. 151, Linn, IA

Built 1979 ADT: 1,140

I 380 SB ON RAMP

Over: 2ND ST NE

0.4 mi. N of Jct. US 151, Linn, IA

Built 1979 ADT: 300

I 380 SB OFF RAMP

Over: 2ND ST NE

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

Built 1979 ADT: 300

I 380 NB ON RAMP

Over: 2ND ST NE

0.6 MI. N OF JCT. US 151, Linn, IA

Built 1979 ADT: 4,374

NB US 151/922

Over: US 30 W JCT

AT JCT. 30, Linn, IA

Built 1980 ADT: 6,700

SB US 151/922

Over: US 30 W JCT

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

Built 1980 ADT: 6,700

EDGEWOOD RD

Over: US 30

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

Built 1980 ADT: 23,400

US 30 EB

Over: UP RR, 21ST ST SW, CREEK

1.9 MI. W OF JCT. 218, Linn, IA

Built 1980 ADT: 130

US 30 WB

Over: UP RR, 21ST ST SW, CREEK

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

Built 1980 ADT: 130

NB I-380

Over: H AVE NE

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

Built 1980 ADT: 3,100

SB I-380

Over: H AVE NE

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

Built 1980 ADT: 3,100

NB I 380

Over: J AVE NE

2.0 mi. S of Jct. IA #100, Linn, IA

Built 1980 ADT: 880

SB I-380

Over: J AVE NE

2.0 mi. S of Jct. IA #100, Linn, IA

Built 1980 ADT: 850

NB I-380

Over: COLDSTREAM AVE NE

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

Built 1980 ADT: 905

SB I-380

Over: COLDSTREAM AVE NE

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

Built 1980 ADT: 905

GLASS RD

Over: I-380

1.1 mi. S OF JCT. IA 100, Linn, IA

Built 1980 ADT: 70,600

IA 100

Over: CENTER POINT RD

0.2 MI. E OF JCT. 380, Linn, IA

Built 1981 ADT: 12,500

NB I-380

Over: 42ND ST

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

Built 1981 ADT: 2,155

SB I-380

Over: 42ND ST

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

Built 1981 ADT: 2,155

EB COLL IA 100

Over: I-380

0.1 mi. S of IA 100, Linn, IA

Built 1982 ADT: 49,200

IA 100

Over: I-380 & RR

At the Jct. I-380, Linn, IA

Built 1982 ADT: 49,200

WB COLL IA 100

Over: I-380

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

Built 1982 ADT: 49,200

BLAIRSFERRY RD

Over: I 380

0.6 MI. N OF JCT. IA 100, Linn, IA

Built 1980 ADT: 32,800

EMMONS ST

Over: I-380

0.9 MI. N OF JCT. 100, Linn, IA

Built 1980 ADT: 41,700

BOYSON ROAD

Over: I-380

1.4 MI. N OF JCT.100, Linn, IA

Built 1982 ADT: 26,300

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.