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)

Sort:

W63 100TH AVE

Over: U.S. 20

3.5 mi. E of Jct. IA 187, Delaware, IA

Built 1970 ADT: 6,500

S 3RD ST

Over: US 20

1.2 MI. E OF JCT. IA 13, Delaware, IA

Built 1974 ADT: 7,700

FM D-5X

Over: US 20

AT JCT. SR D5X, Delaware, IA

Built 1973 ADT: 6,800

US 20 EB

Over: 205TH AVE SPRING BRANCH

2.8 MI. W OF JCT. IA 38, Delaware, IA

Built 1973 ADT: 150

US 20 WB

Over: 205TH AVE SPRING BRANCH

2.8 MI. W OF JCT. IA 38, Delaware, IA

Built 1973 ADT: 150

220TH AVE

Over: US 20

At jct. US 20, Delaware, IA

Built 1973 ADT: 8,600

IA 38

Over: US 20

AT THE JCT. OF US 20, Delaware, IA

Built 1974 ADT: 7,500

X 35 (270TH AVE)

Over: US 20

3.7 mi. E of Jct. IA #38, Delaware, IA

Built 1987 ADT: 8,100

FM 230TH AVE

Over: MAQUOKETA RIVER

088042902, Delaware, IA

Built 1934 ADT: 108

LOC FIREFLY RD

Over: STREAM

089051806, Delaware, IA

Built 1935 Load: 10.4 t ADT: 69

FM 230TH AVE

Over: BUCK CREEK

087041702, Delaware, IA

Built 1963 Load: 11.7 t ADT: 383

LOCAL OAK RD

Over: STREAM

090041603, Delaware, IA

Built 1965 Load: 14.3 t ADT: 59

LOC 270 AVE

Over: PENNS CREEK

088041204, Delaware, IA

Built 1983 Load: 15.2 t ADT: 49

140TH ST

Over: HONEY CREEK

090052701, Delaware, IA

Built 1925 Load: 15.6 t ADT: 30

LOCAL 120 AVE

Over: BUFFALO CREEK OVERFLOW

087062804, Delaware, IA

Built 2003 Load: 15.9 t ADT: 44

LOCAL 325 ST

Over: STREAM

087062503, Delaware, IA

Built 1975 Load: 16.3 t ADT: 26

LOCAL 330 ST

Over: SMALL STREAM

087063601, Delaware, IA

Built 1966 Load: 16.3 t ADT: 33

LOCAL 180TH AVE

Over: SMALL STREAM

087050402, Delaware, IA

Built 1945 Load: 17.0 t ADT: 97

FM 110TH AVE

Over: BUFFALO CREEK

087062002, Delaware, IA

Built 1977 Load: 17.0 t ADT: 403

FM 280 AVE

Over: SMALL STREAM

090031804, Delaware, IA

Built 1962 Load: 17.0 t ADT: 98

FM 300 AVE

Over: BEAR CREEK

090032102, Delaware, IA

Built 1960 Load: 17.0 t ADT: 462

BACKBONE ST PK

Over: MAQUOKETA RIVER

IN BACKBONE STATE PARK, Delaware, IA

Built 1976 Load: 18.2 t

NATURE RD

Over: ODELL BRANCH

090041706, Delaware, IA

Built 1939 Load: 18.8 t ADT: 59

LOC 122 ST

Over: LINDSEY CREEK

090051603, Delaware, IA

Built 1981 Load: 19.0 t ADT: 20

FM 300TH ST

Over: SMALL STREAM

087061701, Delaware, IA

Built 1978 Load: 19.4 t ADT: 324

FM SHERWOOD RD

Over: SMALL STREAM

88 03 17 03, Delaware, IA

Built 2011 Load: 19.4 t ADT: 39

BACKBONE ST PK

Over: STREAM

IN BACKBONE STATE PARK, Delaware, IA

Built 1934 Load: 19.6 t

300TH AVE

Over: STREAM

088 03 21 02, Delaware, IA

Built 2015 Load: 20.1 t ADT: 33

OAK RD

Over: O'DELL BRANCH

090041603, Delaware, IA

Built 1964 Load: 20.4 t ADT: 59

265TH ST

Over: STREAM

880328 5050, Delaware, IA

Built 2016 Load: 20.7 t ADT: 70

137TH ST

Over: SMALL STREAM

090042303, Delaware, IA

Built 1939 Load: 20.9 t ADT: 44

LOC 285 ST

Over: SMALL STREAM

087030509, Delaware, IA

Built 1966 Load: 21.7 t ADT: 29

LOCAL 210 AVE

Over: SMALL STREAM

087052502, Delaware, IA

Built 1965 Load: 21.7 t ADT: 11

FM 182ND ST

Over: SMALL STREAM

089031503, Delaware, IA

Built 1991 Load: 21.7 t ADT: 59

LOCAL 120 ST

Over: SMALL STREAM

090061301, Delaware, IA

Built 1971 Load: 21.7 t ADT: 88

FM 332 AVE

Over: BEAR CREEK

089032504, Delaware, IA

Built 1997 Load: 21.9 t ADT: 1,218

LOCAL 320 ST

Over: SMALL STREAM

087043001, Delaware, IA

Built 1993 Load: 22.0 t ADT: 26

250TH ST

Over: SMALL STREAM

088042203, Delaware, IA

Built 1991 Load: 22.0 t ADT: 70

FM 240 ST

Over: STREAM

088051801, Delaware, IA

Built 1965 Load: 22.0 t ADT: 69

FM 240 ST

Over: SMALL STREAM

088051803, Delaware, IA

Built 1965 Load: 22.0 t ADT: 79

LOCAL 255 ST

Over: SMALL STREAM

088051905, Delaware, IA

Built 1968 Load: 22.0 t ADT: 79

LOCAL 190 ST

Over: STREAM

089031901, Delaware, IA

Built 1969 Load: 22.0 t ADT: 29

LOCAL 280 AVE

Over: PLUM CREEK

089033002, Delaware, IA

Built 1974 Load: 22.0 t ADT: 39

FM - 180TH ST

Over: SMALL STREAM

089041305, Delaware, IA

Built 1976 Load: 22.0 t ADT: 44

LOC 160 ST

Over: SMALL STREAM

089060501, Delaware, IA

Built 1980 Load: 22.0 t ADT: 29

210TH AVE

Over: SMALL STREAM

090052404, Delaware, IA

Built 1978 Load: 22.0 t ADT: 44

170TH AVE

Over: SMALL STREAM

087050804, Delaware, IA

Built 1992 Load: 22.4 t ADT: 97

LOC 230TH ST

Over: STREAM

088030801, Delaware, IA

Built 1992 Load: 22.4 t ADT: 39

LOCAL 290 AVE

Over: SMALL STREAM

090032902, Delaware, IA

Built 1992 Load: 22.4 t ADT: 15

140TH ST

Over: STREAM

090053001, Delaware, IA

Built 1968 Load: 22.4 t ADT: 5

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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