Delaware County, IA

254 public highway bridges

Delaware County Bridge Snapshot

Delaware County, Iowa contains 254 public highway bridges in the FHWA National Bridge Inventory. Roughly 38.6% are rated “Good,” 51.6% “Fair,” 6.7% “Poor,” and 6.7% 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.

254
Total Bridges
38.6%
Good
6.7%
Poor
6.7%
Structurally Deficient

Condition Distribution

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

LOC 320 AVE

Poor

Over: SMALL STREAM

087031402, Delaware, IA

Built 1971 Load: 24.6 t ADT: 20

LOC 333 AVE

Poor

Over: STREAM

087032404, Delaware, IA

Built 1975 Load: 25.6 t ADT: 29

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