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)

Sort:

BACKBONE ST PK

Over: MAQUOKETA RIVER

IN BACKBONE STATE PARK, Delaware, IA

Built 1934 Load: 22.4 t

IA 3

Over: PINE CREEK

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

Built 1932 Load: 22.7 t ADT: 760

LOCAL LINN-DEL

Over: STREAM

087053101, Delaware, IA

Built 1975 Load: 22.7 t ADT: 59

LOCAL 137 ST

Over: SMALL STREAM

090042205, Delaware, IA

Built 1939 Load: 22.7 t ADT: 44

LOC SHERWOOD RD

Over: SMALL STREAM

088030802, Delaware, IA

Built 1970 Load: 23.0 t ADT: 49

LOC 302 ST

Over: SMALL STREAM

087031403, Delaware, IA

Built 1964 Load: 24.0 t ADT: 49

LOC 325TH ST

Over: SMALL STREAM

087042703, Delaware, IA

Built 2001 Load: 24.0 t ADT: 33

LOCAL 130 AVE

Over: SMALL STREAM

088063402, Delaware, IA

Built 1967 Load: 24.0 t ADT: 11

FM 190 AVE

Over: BUCK CREEK

087051502, Delaware, IA

Built 1969 Load: 24.3 t ADT: 157

FM 190 AVE

Over: SMALL STREAM

087050302, Delaware, IA

Built 1968 Load: 24.6 t ADT: 157

LOCAL 200 AVE

Over: SMALL STREAM

087051104, Delaware, IA

Built 1967 Load: 24.6 t ADT: 49

LOCAL 170 AVE

Over: SMALL STREAM

087051702, Delaware, IA

Built 1970 Load: 24.6 t ADT: 20

210TH AVE

Over: SMALL STREAM

087052502, Delaware, IA

Built 1994 Load: 24.6 t ADT: 11

LOCAL 145 ST

Over: BEAR CREEK

090032803, Delaware, IA

Built 1976 Load: 24.6 t ADT: 78

LOC 120TH AVE

Over: STREAM

090062804, Delaware, IA

Built 1977 Load: 24.6 t ADT: 26

LOC 150TH ST

Over: SANDHAGEN CREEK

090063201, Delaware, IA

Built 1976 Load: 24.6 t ADT: 44

LOCAL 320TH ST.

Over: SMALL STREAM

087052501, Delaware, IA

Built 1995 Load: 24.9 t ADT: 15

LOCAL 165 ST

Over: LINDSEY CREEK

089050303, Delaware, IA

Built 1983 Load: 24.9 t ADT: 59

LOCAL 165 ST

Over: HONEY CREEK

089050303, Delaware, IA

Built 1983 Load: 24.9 t ADT: 59

LOC 285 AVE

Over: SMALL STREAM

087031910, Delaware, IA

Built 1977 Load: 25.3 t ADT: 78

LOC 333RD AVE

Over: SMALL STREAM

087032508, Delaware, IA

Built 1976 Load: 25.3 t ADT: 97

LOCAL 295 ST

Over: SMALL STREAM

087051007, Delaware, IA

Built 1987 Load: 25.3 t ADT: 39

LOCAL 200 AVE

Over: SMALL STREAM

087052602, Delaware, IA

Built 1966 Load: 25.3 t ADT: 70

LOCAL 310 AVE

Over: STREAM

089032202, Delaware, IA

Built 1966 Load: 25.3 t ADT: 78

IA 13

Over: BRANCH MAQUOKETA RIVER

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

Built 1975 Load: 25.4 t ADT: 4,840

FM 220 AVE

Over: SMALL

087043002, Delaware, IA

Built 1980 Load: 25.6 t ADT: 20

LOC 275TH ST

Over: STREAM

088063303, Delaware, IA

Built 1975 Load: 25.6 t ADT: 15

FM 180TH ST

Over: SMALL STREAM

089031801, Delaware, IA

Built 1978 Load: 25.6 t ADT: 69

LOC 207TH ST

Over: STREAM

089062807, Delaware, IA

Built 1977 Load: 25.6 t ADT: 29

JET RD

Over: STREAM

090051403, Delaware, IA

Built 1969 Load: 25.6 t ADT: 44

FM 110 AVE

Over: S FORK MAQUOKETA RIVER

090061702, Delaware, IA

Built 1969 Load: 25.9 t ADT: 108

FM RIDGE RD

Over: ALLISON CREEK

088042603, Delaware, IA

Built 2003 Load: 26.2 t ADT: 44

FM 270 AVE

Over: SMALL STREAM

089041302, Delaware, IA

Built 1970 Load: 26.3 t ADT: 275

FM 195 ST

Over: MAQUOKETA RIVER

089051903, Delaware, IA

Built 1969 Load: 26.6 t ADT: 835

LOC CANDLE RD

Over: PRAIRIE CREEK

089062805, Delaware, IA

Built 1950 Load: 27.2 t ADT: 59

IA 3

Over: LINDSEY CREEK

1.3 MI. E OF E Jct. IA 13, Delaware, IA

Built 1979 Load: 27.8 t ADT: 2,070

LOC 215TH ST

Over: STREAM

089063105, Delaware, IA

Built 1940 Load: 27.8 t ADT: 39

OAK RD

Over: STREAM

090041603, Delaware, IA

Built 1978 Load: 28.8 t ADT: 59

LOC IVY RD

Over: BR LITTLE YORK

090050903, Delaware, IA

Built 1951 Load: 28.8 t ADT: 34

LOC STAGECOACH

Over: PRAIRIE CREEK

089062707, Delaware, IA

Built 1949 Load: 29.0 t ADT: 97

205 AVE

Over: SPRING CREEK

089053504, Delaware, IA

Built 1975 Load: 29.8 t ADT: 295

205 AVE

Over: SPRING CREEK

089053504, Delaware, IA

Built 1975 Load: 29.9 t ADT: 295

205 AVE

Over: SPRING CREEK

089053504, Delaware, IA

Built 1975 Load: 29.9 t ADT: 295

FM 270 AVE

Over: PLUM CREEK

089042402, Delaware, IA

Built 1969 Load: 29.9 t ADT: 275

FM 110 AVE

Over: PRAIRIE CREEK

089062906, Delaware, IA

Built 1986 Load: 29.9 t ADT: 206

FM 315TH ST

Over: LIME CREEK

087042008, Delaware, IA

Built 1978 Load: 30.2 t ADT: 530

LOCAL

Over: BUCK CREEK

087051602, Delaware, IA

Built 1983 Load: 30.2 t ADT: 70

EB US 20

Over: OVER CC RR

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

Built 1971 Load: 30.2 t ADT: 3,850

FM 150 ST

Over: HONEY CREEK

090053501, Delaware, IA

Built 1949 Load: 30.5 t ADT: 363

NATURE RD

Over: SMALL STREAM

090040904, Delaware, IA

Built 1940 Load: 30.6 t ADT: 26

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026