Benton County, IA

327 public highway bridges

Benton County Bridge Snapshot

Benton County, Iowa contains 327 public highway bridges in the FHWA National Bridge Inventory. Roughly 32.1% are rated “Good,” 42.2% “Fair,” 23.5% “Poor,” and 23.5% 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.

327

Total Bridges

32.1%

Good

23.5%

Poor

23.5%

Structurally Deficient

Condition Distribution

Good

32.1% (105)

Fair

42.2% (138)

Poor

23.5% (77)

SD

23.5% (77)

All Bridges (327)

Sort:

FM

Over: MUD CREEK

085102205, Benton, IA

Built 1992 Load: 36.9 t ADT: 1,532

FM

Over: BEAR CREEK

086100206, Benton, IA

Built 1991 Load: 36.9 t ADT: 658

IA 21

Over: STEIN CREEK

200 ft. N of Jct. SR E36, Benton, IA

Built 1979 Load: 37.0 t ADT: 1,470

LOCAL

Over: BR PRAIRIE CK

082110802, Benton, IA

Built 1989 Load: 37.1 t ADT: 40

LOCAL

Over: BUCKEYE CREEK

082120901, Benton, IA

Built 1989 Load: 37.1 t ADT: 40

LOCAL

Over: STEIN CREEK

084120601, Benton, IA

Built 1990 Load: 37.1 t ADT: 34

LOCAL

Over: PRAIRIE CK

086091901, Benton, IA

Built 1989 Load: 37.1 t ADT: 26

LOCAL (LWC)

Over: BEAR CREEK

086102202, Benton, IA

Built 1980 Load: 37.7 t ADT: 70

FM

Over: OPOSSUM CREEK

084091501, Benton, IA

Built 1959 Load: 38.8 t ADT: 1,100

LOCAL

Over: BR STEIN CK

084122302, Benton, IA

Built 2002 Load: 39.0 t ADT: 15

FM

Over: LIME CREEK

086100403, Benton, IA

Built 1990 Load: 39.4 t ADT: 324

LOCAL

Over: MUD CREEK

082101201, Benton, IA

Built 1990 Load: 39.6 t ADT: 14

FM

Over: MUD CREEK

084100703, Benton, IA

Built 1989 Load: 39.6 t ADT: 60

LOCAL (LWC)

Over: PRAIRIE CREEK

082093002, Benton, IA

Built 1979 Load: 41.4 t ADT: 5

LOCAL (LWC)

Over: SMALL STREAM

083113002, Benton, IA

Built 1992 Load: 41.5 t ADT: 15

LOCAL

Over: MUD CREEK

084111601, Benton, IA

Built 1996 Load: 43.1 t ADT: 15

LOCAL (LWC)

Over: BR PRAIRIE CK

083111704, Benton, IA

Built 1991 Load: 43.2 t ADT: 5

FM

Over: MUD CREEK

084112601, Benton, IA

Built 2003 Load: 45.7 t ADT: 200

LOCAL (LWC)

Over: BR BUCKEYE CREEK

082122302, Benton, IA

Built 1994 Load: 46.3 t ADT: 71

LOCAL

Over: BLUE CREEK

086092303, Benton, IA

Built 1985 Load: 47.2 t ADT: 5

IA 150

Over: CEDAR RIVER

1.0 mi. South of SR E16, Benton, IA

Built 1980 Load: 47.3 t ADT: 3,840

FM

Over: DRY CREEK

083090101, Benton, IA

Built 1988 Load: 50.0 t ADT: 34

FM

Over: DRY CREEK

083091402, Benton, IA

Built 1999 Load: 50.0 t ADT: 1,444

LOCAL

Over: WILDCAT CREEK

084102602, Benton, IA

Built 1994 Load: 50.0 t ADT: 15

FM

Over: MUD CREEK

084110902, Benton, IA

Built 2002 Load: 51.1 t ADT: 200

FM

Over: BUCKEYE CREEK

082122205, Benton, IA

Built 1960 Load: 52.2 t ADT: 850

LOCAL

Over: BR PRAIRIE CREEK

083122302, Benton, IA

Built 1995 Load: 52.2 t ADT: 71

LOCAL (LWC)

Over: BRANCH PRAIRIE CREEK

082110401, Benton, IA

Built 1987 Load: 52.6 t ADT: 15

LOCAL (LWC)

Over: ROCK CREEK

086122601, Benton, IA

Built 1986 Load: 52.6 t ADT: 11

FM

Over: DRY CREEK

083092101, Benton, IA

Built 1998 Load: 52.9 t ADT: 1,296

FM

Over: BEAR CREEK

084092604, Benton, IA

Built 1999 Load: 52.9 t ADT: 1,444

FM

Over: WILD CAT CREEK

084102502, Benton, IA

Built 1993 Load: 52.9 t ADT: 422

LOCAL (LWC)

Over: BRANCH BLUE CREEK

086090208, Benton, IA

Built 1987 Load: 55.2 t ADT: 39

LOCAL

Over: BR MUD CREEK

084111107, Benton, IA

Built 1994 Load: 55.8 t ADT: 15

LOCAL

Over: BR LITTLE BEAR CK

084093304, Benton, IA

Built 1990 Load: 56.6 t ADT: 20

LOCAL

Over: BR HINKLE CREEK

084110401, Benton, IA

Built 1996 Load: 57.1 t ADT: 30

LOCAL

Over: BR PRAIRIE CK

083112603, Benton, IA

Built 2001 Load: 60.1 t ADT: 20

FM

Over: SMALL STREAM

085090305, Benton, IA

Built 1961 Load: 61.0 t ADT: 157

LOCAL (LWC)

Over: SMALL STREAM

086121204, Benton, IA

Built 1992 Load: 73.8 t ADT: 26

LOCAL

Over: BR SALT CREEK

083123001, Benton, IA

Built 1997 Load: 88.6 t ADT: 30

LOCAL

Over: BR PRAIRIE CREEK

083120402, Benton, IA

Built 1997 Load: 88.6 t ADT: 20

50 TH DR

Over: BLUE CREEK

086090205, Benton, IA

Built 2000 Load: 88.7 t ADT: 11

FM

Over: SMALL STREAM

083120201, Benton, IA

Built 1992 Load: 99.9 t ADT: 45

FM

Over: SMALL STREAM

084102001, Benton, IA

Built 1992 Load: 99.9 t ADT: 45

LOCAL (LWC)

Over: SMALL STREAM

085123504, Benton, IA

Built 1992 Load: 99.9 t ADT: 11

US 218

Over: DRAINAGE DITCH

1.6 MI. N OF JCT. SR E44, Benton, IA

Built 1960 Load: 22.6 t ADT: 2,690

FM

Over: PRAIRIE CREEK

082092008, Benton, IA

Built 1986 Load: 24.9 t ADT: 137

12TH AVE

Over: STREAM

084121602, Benton, IA

Built 2003 Load: 25.3 t ADT: 34

LOCAL

Over: SPRING CK

086112002, Benton, IA

Built 2002 Load: 27.1 t ADT: 60

LOCAL

Over: BRANCH WEASEL CREEK

082100702, Benton, IA

Built 1987 Load: 29.0 t ADT: 30

Read our methodology — how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →

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