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)

EB US 20

Fair

Over: MAQUOKETA RIVER

1.7 mi. E of Jct. IA 13, Delaware, IA

Built 1974 Load: 30.9 t ADT: 3,850

WB US 20

Fair

Over: MAQUOKETA RIVER

1.7 mi. E of Jct. IA 13, Delaware, IA

Built 1973 Load: 31.3 t ADT: 3,850

LOC 302 ST

Fair

Over: SMALL STREAM

087031403, Delaware, IA

Built 1984 Load: 31.8 t ADT: 49

335TH ST

Fair

Over: SMALL STREAM

087043203, Delaware, IA

Built 1988 Load: 31.8 t ADT: 15

LOCAL DOVE RD

Fair

Over: STREAM

089060202, Delaware, IA

Built 1990 Load: 31.8 t ADT: 39

LOCAL 185 ST

Fair

Over: PLUM CREEK

089041603, Delaware, IA

Built 1986 Load: 32.4 t ADT: 20

LOCAL 320 AVE

Fair

Over: COOKSLEY CREEK

088031402, Delaware, IA

Built 1989 Load: 32.7 t ADT: 30

FM 195 ST

Fair

Over: HONEY CREEK

089052005, Delaware, IA

Built 1980 Load: 32.7 t ADT: 835

BACKBONE ST PK

Fair

Over: STREAM

IN BACKBONE STATE PARK, Delaware, IA

Built 1935 Load: 32.7 t

BACKBONE STATE PK

Fair

Over: BR MAQUOKETA RIVER

IN BACKBONE STATE PARK, Delaware, IA

Built 1976 Load: 33.5 t

LOCAL 240 ST

Fair

Over: SAND CREEK

088061401, Delaware, IA

Built 1985 Load: 34.3 t ADT: 88

FM 210TH AVE

Fair

Over: SMALL STREAM

089052502, Delaware, IA

Built 1984 Load: 34.3 t ADT: 29

LOC 200TH ST

Fair

Over: SPRING BRANCH

089062901, Delaware, IA

Built 1989 Load: 34.3 t ADT: 33

IA 13

Fair

Over: BRANCH MAQUOKETA RIVER

0.9 mi N of N jct. SR D47, Delaware, IA

Built 1975 Load: 35.3 t ADT: 4,840

LOC FIREFLY RD

Fair

Over: SMALL STREAM

089060106, Delaware, IA

Built 1986 Load: 35.6 t ADT: 59

LOC 150TH AVE

Fair

Over: SMALL STREAM

090060102, Delaware, IA

Built 1981 Load: 35.6 t ADT: 39

LOCAL 280 ST

Fair

Over: ROBINSON CREEK

087060601, Delaware, IA

Built 1981 Load: 36.0 t ADT: 33

FM - 175TH ST

Fair

Over: SMALL STREAM

089041105, Delaware, IA

Built 1955 Load: 36.0 t ADT: 59

LOC 110TH AVE

Fair

Over: STREAM

090060604, Delaware, IA

Built 1989 Load: 36.0 t ADT: 39

D22 210TH ST

Fair

Over: BR PRAIRIE CREEK

089063507, Delaware, IA

Built 1953 Load: 36.3 t ADT: 3,015

LOC BUC-DEL AVE

Fair

Over: SPRING BRANCH CREEK

089060702, Delaware, IA

Built 1983 Load: 36.3 t ADT: 33

120TH ST

Fair

Over: STREAM

090041301, Delaware, IA

Built 1985 Load: 36.3 t ADT: 26

LOC 255TH AVE

Fair

Over: BR ALMORAL CR

089040304, Delaware, IA

Built 1989 Load: 36.3 t ADT: 29

155TH ST

Fair

Over: SMALL STREAM

090053105, Delaware, IA

Built 1983 Load: 36.6 t ADT: 49

LOCAL 120 AVE

Fair

Over: SMALL STREAM

088062802, Delaware, IA

Built 1982 Load: 37.9 t ADT: 5

LOC 155TH ST

Fair

Over: SMALL STREAM

090063605, Delaware, IA

Built 1982 Load: 37.9 t ADT: 49

FM 210 AVE

Fair

Over: STREAM

089050104, Delaware, IA

Built 1987 Load: 38.9 t ADT: 25

FM 150 ST

Fair

Over: LINDSEY CREEK

090053203, Delaware, IA

Built 1991 Load: 39.0 t ADT: 344

US 20

Fair

Over: DRAINAGE DITCH

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

Built 1963 Load: 39.4 t ADT: 9,000

FM 145 AVE

Fair

Over: PRAIRIE CREEK

089062604, Delaware, IA

Built 1971 Load: 39.9 t ADT: 1,296

FM 200 AVE

Fair

Over: HONEY CREEK

090052602, Delaware, IA

Built 1998 Load: 45.4 t ADT: 570

FM 145 AVE

Fair

Over: SMALL STREAM

089061404, Delaware, IA

Built 1970 Load: 46.3 t ADT: 1,021

FM 165 ST

Fair

Over: SMALL STREAM

089060303, Delaware, IA

Built 1970 Load: 47.3 t ADT: 825

EB US 20

Fair

Over: OVER ABANDON RR

0.4 MI W OF JCT IOWA #38, Delaware, IA

Built 1974 Load: 47.6 t ADT: 4,250

FM 160TH ST

Fair

Over: BEAR CREEK

089030203, Delaware, IA

Built 1994 Load: 48.2 t ADT: 462

180TH AVE

Fair

Over: LINDSEY CREEK

090053302, Delaware, IA

Built 2000 Load: 52.9 t ADT: 1,030

FM - 160TH ST

Fair

Over: SMALL STREAM

089030203, Delaware, IA

Built 1979 Load: 60.4 t ADT: 462

FM 230 AVE

Fair

Over: SMALL STREAM

087040802, Delaware, IA

Built 1963 Load: 72.8 t ADT: 383

FM 255TH ST

Fair

Over: SMALL STREAM

088062405, Delaware, IA

Built 1959 Load: 78.0 t ADT: 344

298TH AVE

Good

Over: PLUM CREEK

088033204, Delaware, IA

Built 2005 Load: 4.5 t ADT: 78

FM HONEY CK RD

Good

Over: SMALL STREAM

089051005, Delaware, IA

Built 1957 Load: 17.0 t ADT: 275

221ST ST

Good

Over: SMALL STREAM

088040303, Delaware, IA

Built 2007 Load: 20.7 t ADT: 44

325TH ST

Good

Over: SMALL STREAM

087062703, Delaware, IA

Built 2020 Load: 21.4 t ADT: 26

RAINBOW RD

Good

Over: ELK CREEK

090041403, Delaware, IA

Built 2004 Load: 21.4 t ADT: 29

LOC 225 ST

Good

Over: SMALL STREAM

088040306, Delaware, IA

Built 1996 Load: 22.0 t ADT: 39

210 ST

Good

Over: DRAINAGE DITCH

089053505, Delaware, IA

Built 1978 Load: 22.7 t ADT: 1,463

FM - 180TH AVE

Good

Over: SMALL STREAM

088050506, Delaware, IA

Built 1973 Load: 22.7 t ADT: 960

231ST AVE

Good

Over: SMALL STREAM

087 04 19 09, Delaware, IA

Built 2013 Load: 24.0 t ADT: 11

155TH ST

Good

Over: HONEY CREEK

090053503, Delaware, IA

Built 1983 Load: 25.3 t ADT: 29

LOCAL 330 AVE

Good

Over: SMALL STREAM

088031304, Delaware, IA

Built 1983 Load: 25.9 t ADT: 90

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.