Delaware County, IA

254 public highway bridges

Delaware County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Delaware County, Iowa contains 254 public highway bridges. Roughly 38.6% are rated “Good,” 51.6% “Fair,” and 6.7% “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.

254
Total Bridges
38.6%
Good
51.6%
Fair
6.7%
Poor Condition

Condition Distribution

Good
38.6% (98)
Fair
51.6% (131)
Poor
6.7% (17)

All Bridges (254)

FM 260TH AVE

Good

Over: PENNS BRANCH

088041102, Delaware, IA

Built 1995 Load: 36.9 t ADT: 236

FM - 180TH AVE

Good

Over: SAND CREEK

088050804, Delaware, IA

Built 1981 Load: 37.3 t ADT: 960

195TH ST

Good

Over: STREAM

089052402, Delaware, IA

Built 2019 Load: 37.6 t ADT: 59

195TH ST

Good

Over: STREAM

089052302, Delaware, IA

Built 2019 Load: 37.6 t ADT: 70

FM THUNDER RD

Good

Over: PLUM CREEK

088033303, Delaware, IA

Built 1993 Load: 38.6 t ADT: 34

137TH ST

Good

Over: SMALL STREAM

900422 4580, Delaware, IA

Built 2015 Load: 38.6 t ADT: 44

LOC 285 AVE

Good

Over: PLUM CREEK

087030608, Delaware, IA

Built 1991 Load: 38.8 t ADT: 39

245TH AVE

Good

Over: PENNS BRANCH

088040904, Delaware, IA

Built 2018 Load: 38.9 t ADT: 29

PIONEER RD

Good

Over: SMALL STREAM

088043405, Delaware, IA

Built 2019 Load: 38.9 t ADT: 49

LOCAL 230 ST

Good

Over: PLUM CREEK

088030701, Delaware, IA

Built 1991 Load: 39.0 t ADT: 50

JEFFERSON RD

Good

Over: SMALL STREAM

088051004, Delaware, IA

Built 2003 Load: 39.0 t ADT: 1,719

LOCAL 280 AVE

Good

Over: PLUM CREEK

089033002, Delaware, IA

Built 1989 Load: 39.0 t ADT: 39

LOCAL BUCH-DEL

Good

Over: S FORK MAQUOKETA RIVER

090061902, Delaware, IA

Built 1997 Load: 39.0 t ADT: 59

FM 165TH ST

Good

Over: MAQUOKETA RIVER

089060105, Delaware, IA

Built 1994 Load: 39.5 t ADT: 295

EB US 20

Good

Over: BRANCH PLUM CREEK

5.0 MI. E OF JCT. IA 38, Delaware, IA

Built 1981 Load: 39.5 t ADT: 4,850

FM 295TH ST

Good

Over: MAQUOKETA RIVER

087041105, Delaware, IA

Built 1985 Load: 39.9 t ADT: 69

285TH ST

Good

Over: SILVER CREEK

087060503, Delaware, IA

Built 2021 Load: 39.9 t ADT: 26

RAINBOW RD

Good

Over: SMALL STREAM

090041405, Delaware, IA

Built 2004 Load: 39.9 t ADT: 20

197TH ST

Good

Over: SMALL STREAM

197th Ave, 50 N of 295th, Delaware, IA

Built 2015 Load: 40.2 t ADT: 44

255TH AVE

Good

Over: PLUM CREEK

089 04 15 06, Delaware, IA

Built 2013 Load: 40.2 t ADT: 29

182ND ST

Good

Over: BEAR CREEK

089 03 14 03, Delaware, IA

Built 2016 Load: 41.1 t ADT: 59

LOCAL 260 AVE

Good

Over: SMALL STREAM

087041006, Delaware, IA

Built 2001 Load: 42.4 t ADT: 59

220TH AVE

Good

Over: BUCK CREEK

087040702, Delaware, IA

Built 2017 Load: 43.7 t ADT: 49

LOCAL 297 ST

Good

Over: SMALL STREAM

087041703, Delaware, IA

Built 1993 Load: 44.1 t ADT: 20

LOCAL 120 AVE

Good

Over: BUFFALO CREEK

087062804, Delaware, IA

Built 2003 Load: 44.7 t ADT: 44

LOCAL 205TH AVE

Good

Over: BUCK CREEK

087051108, Delaware, IA

Built 1995 Load: 45.3 t ADT: 26

130TH ST

Good

Over: UNNAMED STREAM

090051901, Delaware, IA

Built 2022 Load: 45.7 t ADT: 45

297TH ST

Good

Over: BUCK CREEK

087051206, Delaware, IA

Built 1999 Load: 46.0 t ADT: 15

IA 13

Good

Over: MAQUOKETA RIVER

0.8 mi. E of W Jct SR D22, Delaware, IA

Built 1991 Load: 46.1 t ADT: 7,900

310TH AVE

Good

Over: STREAM

090 03 15 04, Delaware, IA

Built 2014 Load: 47.6 t ADT: 88

LOC 130TH AVE

Good

Over: STREAM

090060304, Delaware, IA

Built 1988 Load: 47.7 t ADT: 44

140TH ST

Good

Over: LINDSEY CREEK

090052801, Delaware, IA

Built 2003 Load: 48.0 t ADT: 29

310TH ST

Good

Over: ROBINSON CREEK

087061903, Delaware, IA

Built 2000 Load: 48.2 t ADT: 49

BACKBONE ST PK

Good

Over: MAQUOKETA RIVER

IN BACKBONE STATE PARK, Delaware, IA

Built 1989 Load: 49.4 t

180TH AVE

Good

Over: LINDSEY CREEK

090052802, Delaware, IA

Built 2004 Load: 50.0 t ADT: 108

LOCAL 190 ST

Good

Over: PLUM CREEK

089042408, Delaware, IA

Built 1996 Load: 52.7 t ADT: 70

FISH HATCHERY

Good

Over: STREAM

IN ST. FISH HATCHERY, Delaware, IA

Built 1994 Load: 53.9 t

LOCAL 220 AVE

Poor

Over: STREAM

089043102, Delaware, IA

Built 1967 Load: 7.1 t ADT: 26

FM 197 AVE

Poor

Over: SMALL STREAM

088051506, Delaware, IA

Built 1967 Load: 13.9 t ADT: 962

190TH AVE

Poor

Over: LINDSEY CREEK

090053304, Delaware, IA

Built 1920 Load: 16.3 t ADT: 20

FM 240 ST

Poor

Over: STREAM

088051701, Delaware, IA

Built 1930 Load: 16.8 t ADT: 79

220 ST

Poor

Over: BR ROBINSON CREEK

088060401, Delaware, IA

Built 1922 Load: 17.0 t ADT: 1,061

FM 170 ST

Poor

Over: SMALL STREAM

089040807, Delaware, IA

Built 1955 Load: 17.0 t ADT: 79

300TH ST

Poor

Over: SMALL STREAM

087051805, Delaware, IA

Built 1930 Load: 17.2 t ADT: 59

FM 140TH AVE

Poor

Over: SMALL STREAM

088061102, Delaware, IA

Built 1972 Load: 21.7 t ADT: 69

LOCAL PHEASANT

Poor

Over: SMALL STREAM

087041303, Delaware, IA

Built 1973 Load: 22.0 t ADT: 97

LOCAL 215 AVE

Poor

Over: SMALL STREAM

087052504, Delaware, IA

Built 1965 Load: 22.0 t ADT: 11

FM 280 AVE

Poor

Over: SMALL STREAM

090033002, Delaware, IA

Built 1973 Load: 22.0 t ADT: 79

140TH ST

Poor

Over: STREAM

090052501, Delaware, IA

Built 1972 Load: 23.0 t ADT: 29

LOC 320 AVE

Poor

Over: SMALL STREAM

087031402, Delaware, IA

Built 1971 Load: 24.6 t ADT: 20

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

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.