Plymouth County, Iowa bridges
Plymouth County has 430 bridges and culverts in the National Bridge Inventory, the oldest built in 1900. 90 (21%) are rated poor. The most common type is stringer/multi-beam or girder (44%).
- Bridges
- 430
- Good
- 54%
- Fair
- 25%
- Poor
- 21%
- 90 bridges
- Average age
- 49.1 yrs
- Posted or closed
- 106
Map of bridges in Plymouth County
Green good, amber fair, red poor. Click a marker for details.Search bridges in Plymouth County
Type at least two characters, or pick a condition or type, to search every bridge in the county.
Condition
Good54%(233)
Fair25%(107)
Poor21%(90)
When they were built
Busiest
- US 75 over StreamFair18,200 vehicles/day
- US 75 over StreamGood14,900 vehicles/day
- US 75 over StreamGood14,900 vehicles/day
- US 75 over StreamGood14,900 vehicles/day
- US 75 over StreamGood14,900 vehicles/day
Longest
- 200th Street over Floyd RiverFair1,001 ft
- Good
- Fair
- FM over Big Sioux RiverFair447 ft
- Fair
Oldest
- FM over SmallFairBuilt 1900
- Nature Ave over Plymouth CreekFairBuilt 1900
- 160th ST over Deep CreekPoorBuilt 1900
- Juniper Ave over Mink CreekPoorBuilt 1900
- 170th ST over DrainagePoorBuilt 1900
All bridges in Plymouth County
Busiest first · showing 1–200 of 430| Bridge | Location | Built | Type | Length | Daily traffic | Condition |
|---|---|---|---|---|---|---|
| US 75 over Stream No. 000000000607675 | 0.1 MI S of Jct. SR C80 | 1999 | Culvert | 27 ft | 18,200 | Fair |
| US 75 over Stream No. 000000000700915 | 0.1 Mi. N of SR C70 | 2019 | Culvert | 25 ft | 14,900 | Good |
| US 75 over Stream No. 000000000700920 | 0.3 MI N of SR C70 | 2019 | Culvert | 25 ft | 14,900 | Good |
| US 75 over Stream No. 000000000700955 | 0.7 MI N of SR C70 | 2019 | Culvert | 25 ft | 14,900 | Good |
| US 75 over Stream No. 000000000700995 | 1.5 Mi. S of SR C60 | 2019 | Culvert | 25 ft | 14,900 | Good |
| US 75 over Stream No. 000000000039390 | 0.3 Mi. N of S.R. C-60 | 1926 | Stringer/Multi-beam or Girder | 34 ft | 14,000 | Poor |
| US 75 over Dry Creek No. 000000000039442 | 1.9 Mi. N of Jct. SR C60 | 2023 | Culvert | 26 ft | 14,000 | Good |
| US 75 over Dry Creek No. 000000000039462 | 2.3 Mi. N of SR C60 | 2023 | Culvert | 25 ft | 14,000 | Good |
| US 75 over Dry Creek No. 000000000039502 | 3.4 Mi. N of JCT SR C60 | 2023 | Culvert | 26 ft | 14,000 | Good |
| US 75 over Drainage Ditch No. 000000000039522 | 2.6 Mi. S of SR C44 | 2023 | Culvert | 38 ft | 14,000 | Good |
| US 75 over Dry Creek No. 000000000039541 | 2.0 MI S of SR C44 | 1972 | Culvert | 25 ft | 14,000 | Good |
| US 75 over Flat Creek No. 000000000039582 | 1.2 Mi. S of SR C44 | 2023 | Culvert | 25 ft | 14,000 | Good |
| US 75 over W Fk Floyd River No. 000000000039600 | 2.4 Mi. S of SR C38 | 1956 | Stringer/Multi-beam or Girder | 243 ft | 10,400 | Fair |
| 200th Street over Floyd River No. 000000000364695 | F22030515 | 2007 | Stringer/Multi-beam or Girder | 1,001 ft | 8,224 | Fair |
| SB US 75 over Stream No. 000000000039330 | 1.3 Mi. N of SR C70 | 1948 | Slab | 28 ft | 7,500 | Fair |
| SB US 75 over Stream No. 000000000039351 | 1.6 Mi. N of Jct. SR C70 | 2020 | Slab | 71 ft | 7,500 | Good |
| US 75 SB over Stream No. 000000000039381 | 0.6 Mi. S of SR C60 | 2020 | Slab | 101 ft | 7,500 | Good |
| NB US 75 over Stream No. 000000000039321 | 1.3 MI N of SR C70 | 1926 | Slab | 26 ft | 7,450 | Good |
| NB US 75 over Stream No. 000000000039342 | 1.6 Mi. N of JCT SR C70 | 2019 | Slab | 71 ft | 7,450 | Good |
| NB US 75 over Stream No. 000000000039371 | 0.6 Mi. S of SR C60 | 1926 | Slab | 26 ft | 7,450 | Fair |
| NB US 75 over Stream No. 000000000039420 | 1.3 MI N of SR C60 | 1950 | Culvert | 25 ft | 7,000 | Fair |
| SB US 75 over Stream No. 000000000039430 | 1.3 Mi. N of S.R. C-60 | 1948 | Slab | 28 ft | 7,000 | Fair |
| SB US 75 over Dry Creek No. 000000000039450 | 1.9 Mi. N of Jct. SR C60 | 1948 | Slab | 28 ft | 7,000 | Fair |
| SB US 75 over Dry Creek No. 000000000039470 | 2.3 Mi. N of SR C60 | 1948 | Slab | 28 ft | 7,000 | Fair |
| NB US 75 over Drainage Ditch No. 000000000039481 | 3.0 Mi. N of Jct. SR C60 | 1972 | Culvert | 34 ft | 7,000 | Fair |
| SB US 75 over Drainage Ditch No. 000000000039490 | 3.0 Mi. N of SR C60 | 1948 | Stringer/Multi-beam or Girder | 38 ft | 7,000 | Fair |
| SB US 75 over Dry Creek No. 000000000039510 | 3.4 Mi. N of Jct. SR C60 | 1948 | Stringer/Multi-beam or Girder | 43 ft | 7,000 | Fair |
| SB US 75 over Drainage Ditch No. 000000000039530 | 2.6 MI S of JCT SR C44 | 1948 | Stringer/Multi-beam or Girder | 39 ft | 7,000 | Fair |
| SB US 75 over Dry Creek No. 000000000039570 | 1.5 Mi. S of SR C44 | 1948 | Slab | 28 ft | 7,000 | Fair |
| SB US 75 over Flat Creek No. 000000000039590 | 1.2 Mi. S of Jct. SR C44 | 1948 | Slab | 28 ft | 7,000 | Fair |
| Ia 60 over Drainage Ditch No. 000000000609205 | 0.4 Mi. S of Jct. SR C16 | 2003 | Culvert | 21 ft | 6,900 | Good |
| Ia 60 over Wolf Creek No. 000000000609455 | 1.5 Mi. N of Jct. US 75 | 2004 | Culvert | 39 ft | 6,200 | Good |
| 200th Street over Ia 75 No. 000000000364690 | 1.0 Mi. N of Jct. SR C38 | 2006 | Stringer/Multi-beam or Girder | 235 ft | 4,973 | Good |
| Ia 3 over Floyd River No. 000000000039851 | 1.0 Mi. E of US 75 | 1981 | Stringer/Multi-beam or Girder | 348 ft | 4,270 | Fair |
| Ia 3 over Stream No. 000000000039881 | 0.9 Mi. W of Jct. SR L12 | 1994 | Culvert | 28 ft | 3,820 | Good |
| Ia 3 over Stream No. 000000000601320 | 2.5 Mi. E of US 75 (bus.) | 1994 | Culvert | 29 ft | 3,820 | Fair |
| Iowa 3 over US 75 (lemars Bypass) No. 000000000609360 | At the Jct. U.S. 75 | 2005 | Stringer/Multi-beam or Girder | 245 ft | 3,660 | Good |
| Ia 60 NB over Stream No. 000000000040050 | 0.7 Mi. S of SR C12 | 1932 | Stringer/Multi-beam or Girder | 27 ft | 3,200 | Fair |
| Ia 60 SB over Stream No. 000000000609200 | 0.7 MI S of SR C12 | 2004 | Culvert | 33 ft | 3,200 | Good |
| US 75 NB over Lake Avenue No. 000000000609460 | 1.1 MI S of JCT Ia 60 | 2006 | Stringer/Multi-beam or Girder | 232 ft | 3,000 | Good |
| US 75 SB over Lake Avenue No. 000000000609465 | 1.1 MI S of JCT Ia 60 | 2006 | Stringer/Multi-beam or Girder | 232 ft | 3,000 | Good |
| Ia 404 NB over Floyd River No. 000000000039631 | 0.4 Mi. N of Jct. Ia 3 | 1972 | Stringer/Multi-beam or Girder | 296 ft | 2,400 | Fair |
| Ia 404 SB over Floyd River No. 000000000039640 | 0.4 Mi. N of Jct. Ia 3 | 1957 | Stringer/Multi-beam or Girder | 353 ft | 2,400 | Fair |
| Ia 3 & 12 over Drainage Ditch No. 000000000039751 | At E JCT of Iowa 12 | 1976 | Culvert | 26 ft | 2,340 | Good |
| Ia 3 & 12 over Westfield Creek No. 000000000039701 | 0.2 MI E of W JCT Ia 12 | 1976 | Stringer/Multi-beam or Girder | 171 ft | 2,270 | Good |
| Ia 3 over Big Whiskey Slough No. 000000000039891 | 0.6 MI W of JCT SR L22 | 1999 | Culvert | 39 ft | 2,140 | Good |
| FM over Perry Creek No. 000000000271920 | 090472704 | 1970 | Stringer/Multi-beam or Girder | 150 ft | 2,134 | Fair |
| Ia 3 over W Fork of Floyd River No. 000000000039841 | 0.7 Mi. W of US 75 | 2004 | Stringer/Multi-beam or Girder | 256 ft | 2,070 | Good |
| US 75 NB over Ia 60 No. 000000000609370 | At Jct. Ia 60 | 2005 | Stringer/Multi-beam or Girder | 234 ft | 2,070 | Good |
| US 75 SB over Ia 60 No. 000000000609375 | At Jct. Iowa 60 | 2005 | Stringer/Multi-beam or Girder | 234 ft | 2,070 | Good |
| Ia 140 over Stream No. 000000000040061 | 0.1 Mi. S of S JCT SR C66 | 1976 | Stringer/Multi-beam or Girder | 129 ft | 1,990 | Good |
| Ia 12 over Drainage Ditch No. 000000000039910 | 2.0 Mi. S of S JCT SR K18 | 1957 | Culvert | 29 ft | 1,940 | Fair |
| Ia 12 over Drainage Ditch No. 000000000039920 | 1.5 MI S of S JCT SR K18 | 1957 | Culvert | 29 ft | 1,940 | Fair |
| Ia 12 over Broken Kettle Creek No. 000000000039930 | 0.1 MI N of S JCT SR K18 | 1956 | Stringer/Multi-beam or Girder | 152 ft | 1,940 | Fair |
| FM C-38 over Drainage No. 000000000274731 | 092453301 | 1977 | Slab | 100 ft | 1,615 | Fair |
| FM C-60 over Floyd River No. 000000000271631 | 090460905 | 1985 | Stringer/Multi-beam or Girder | 243 ft | 1,586 | Good |
| Ia 3 over Big Sioux River No. 000000000039651 | 1.5 Mi. W of W Jct. Ia 12 | 2010 | Stringer/Multi-beam or Girder | 506 ft | 1,570 | Good |
| Ia 3 over Big Sioux Overflow No. 000000000039660 | 1.3 Mi. W of Jct. Ia 12 | 1962 | Slab | 102 ft | 1,570 | Fair |
| Ia 3 over Big Sioux Overflow No. 000000000039670 | 1.0 Mi. W of Jct. Ia 12 | 1962 | Slab | 102 ft | 1,570 | Fair |
| Ia 3 over Westfield Creek No. 000000000039690 | 0.2 Mi. W of W Jct. Ia 12 | 1962 | Stringer/Multi-beam or Girder | 155 ft | 1,570 | Fair |
| FM over Floyd River No. 000000000274721 | 092453105 | 2007 | Stringer/Multi-beam or Girder | 288 ft | 1,566 | Good |
| FM C-70 over Floyd River No. 000000000271791 | 090463007 | 1990 | Stringer/Multi-beam or Girder | 300 ft | 1,487 | Good |
| FM over Minnie Creek No. 000000000274711 | 092452702 | 1975 | Culvert | 26 ft | 1,446 | Fair |
| Ia 3 over Drainage Ditch No. 000000000039811 | 1.6 Mi. W of Jct. SR K42 | 2020 | Culvert | 26 ft | 1,420 | Good |
| Ia 3 over Stream No. 000000000039820 | 1.0 Mi. W of S.R. K42 | 1954 | Slab | 127 ft | 1,420 | Fair |
| Ia 3 over Mink Creek No. 000000000039830 | 0.4 MI W of SR K42 | 1954 | Slab | 128 ft | 1,420 | Fair |
| Ia 140 over W Fk Little Sioux River No. 000000000270630 | 1.5 Mi. N of Jct. SR C66 | 1964 | Stringer/Multi-beam or Girder | 178 ft | 1,390 | Fair |
| C 38 over Mink Creek No. 000000000275141 | 92-46-35-01-10 | 2012 | Slab | 153 ft | 1,347 | Good |
| C-38 over W Br Floyd River No. 000000000275151 | 9246350120 | 2012 | Stringer/Multi-beam or Girder | 204 ft | 1,347 | Good |
| Access Road over Stream No. 000000000607385 | 0.1 Mi. S of S.R. C80 | 2000 | Culvert | 25 ft | 1,347 | Good |
| FM C-38 over Plymouth Creek No. 000000000274751 | 092453501 | 1977 | Slab | 125 ft | 1,267 | Good |
| Ia 12 over Drainage Ditch No. 000000000039940 | 1.9 MI N of N JCT SR K18 | 1957 | Culvert | 25 ft | 1,250 | Fair |
| Ia 12 over Drainage Ditch No. 000000000039960 | 3.4 MI S of S Jct. Ia 3 | 1957 | Culvert | 25 ft | 1,250 | Fair |
| FM K-49 over Plymouth CR No. 000000000272891 | 091450302 | 1974 | Slab | 125 ft | 1,236 | Fair |
| FM over Johns Creek No. 000000000274541 | 092443601 | 1976 | Slab | 125 ft | 1,157 | Fair |
| Ia 12 over Beaver Creek No. 000000000039971 | 0.5 Mi. N of SR C16 | 1975 | Slab | 134 ft | 1,130 | Fair |
| Ia 12 over Indian Creek No. 000000000040021 | 4.0 MI N of SR C16 | 2021 | Stringer/Multi-beam or Girder | 217 ft | 1,130 | Good |
| Ia 140 over Clear Creek No. 000000000274010 | 2.8 Mi. S of Ia 3 | 1964 | Slab | 32 ft | 1,130 | Fair |
| Big Sioux River RD over Big Sioux River No. 000000000603911 | 0.5 Mi. N of Jct. Ia 12 | 1996 | Stringer/Multi-beam or Girder | 490 ft | 1,121 | Fair |
| FM over Perry Creek No. 000000000273575 | 091471402 | 1949 | Stringer/Multi-beam or Girder | 158 ft | 1,028 | Fair |
| FM over Perry Creek No. 000000000273660 | 091472602 | 1970 | Stringer/Multi-beam or Girder | 125 ft | 1,028 | Fair |
| FM K-49 over Drainage No. 000000000272951 | 091451002 | 1975 | Culvert | 21 ft | 1,017 | Good |
| Ia 140 over Drainage No. 000000000270516 | 0.5 Mi. N of SR C60 | 2008 | Culvert | 25 ft | 970 | Good |
| Ia 140 over Drainage No. 000000000272115 | 1.4 S of S.R. C38 | 1963 | Culvert | 22 ft | 970 | Fair |
| Ia 140 over Rathburn Creek No. 000000000272220 | 3.3 MI S of SR C38 | 1964 | Slab | 75 ft | 970 | Fair |
| C38 over Perry Creek No. 000000000275511 | 9247360110 | 2017 | Culvert | 24 ft | 948 | Good |
| Ia 3 over Westfield Creek No. 000000000039771 | 2.0 MI E of E JCT Ia 12 | 1975 | Culvert | 25 ft | 940 | Good |
| Ia 3 over Stream No. 000000000039781 | 2.0 Mi. E of SR K18 | 1975 | Culvert | 24 ft | 940 | Good |
| Ia 3 over Broken Kettle Creek No. 000000000039791 | 2.3 Mi. W of SR K22 | 1975 | Slab | 103 ft | 940 | Fair |
| FM K-64 over Deep Creek No. 000000000274261 | 092440406 | 1982 | Stringer/Multi-beam or Girder | 167 ft | 938 | Good |
| FM C-60 over Perry Creek No. 000000000271851 | 090471101 | 1984 | Slab | 128 ft | 908 | Good |
| FM over Small No. 000000000277491 | 093473502 | 1978 | Slab | 100 ft | 878 | Good |
| FM over Deep Creek No. 000000000276221 | 093433202 | 1981 | Slab | 159 ft | 868 | Good |
| 4th Ave.E over Willow Creek No. 000000000274601 | 000000000 | 1993 | Stringer/Multi-beam or Girder | 189 ft | 851 | Good |
| FM over Creek No. 000000000274151 | 092433401 | 1976 | Culvert | 33 ft | 848 | Fair |
| FM over Whiskey Creek No. 000000000274181 | 092433501 | 1997 | Slab | 125 ft | 848 | Good |
| FM over Bull Run No. 000000000275471 | 092473201 | 1995 | Slab | 113 ft | 838 | Good |
| FM over Bull Run Creek No. 000000000275890 | 092483601 | 1960 | Stringer/Multi-beam or Girder | 178 ft | 838 | Fair |
| FM K-49 over Whiskey Creek No. 000000000273071 | 091452702 | 1974 | Slab | 100 ft | 818 | Fair |
| FM over Plymouth Creek No. 000000000274371 | 092441602 | 1975 | Culvert | 24 ft | 789 | Good |
| C30 190th ST over Plymouth Creek No. 000000000274401 | 9244190110 | 2020 | Stringer/Multi-beam or Girder | 93 ft | 789 | Good |
| FM over Drainage No. 000000000270745 | 090432904 | 1972 | Slab | 100 ft | 748 | Good |
| FM K-42 over Drainage No. 000000000273211 | 091460202 | 2008 | Culvert | 24 ft | 748 | Good |
| FM over Willow Creek No. 000000000276420 | 093442102 | 1968 | Slab | 128 ft | 748 | Fair |
| FM over Small No. 000000000277401 | 093472302 | 1978 | Slab | 75 ft | 688 | Fair |
| FM over Drainage No. 000000000275870 | 092483501 | 1960 | Culvert | 22 ft | 669 | Fair |
| FM over W Branch Floyd River No. 000000000276611 | 093450803 | 1976 | Stringer/Multi-beam or Girder | 200 ft | 658 | Good |
| FM C-60 over Minnie Brook No. 000000000271311 | 090450703 | 1979 | Slab | 103 ft | 628 | Good |
| FM C-60 over Big Whiskey Creek No. 000000000271321 | 090450801 | 2006 | Slab | 112 ft | 628 | Good |
| FM C-60 over Kettle Creek No. 000000000271640 | 090461101 | 1969 | Slab | 100 ft | 628 | Good |
| FM over Stephens Creek No. 000000000272021 | 090481506 | 1960 | Stringer/Multi-beam or Girder | 102 ft | 628 | Poor |
| FM over Small No. 000000000272031 | 090482308 | 1900 | Slab | 102 ft | 628 | Fair |
| FM K-42 over Mink Creek No. 000000000274800 | 092460304 | 1961 | Stringer/Multi-beam or Girder | 150 ft | 628 | Fair |
| FM over Mink Creek No. 000000000277100 | 093462702 | 1961 | Slab | 128 ft | 628 | Fair |
| FM over Mink Creek No. 000000000277110 | 093462702 | 1961 | Stringer/Multi-beam or Girder | 125 ft | 628 | Fair |
| FM over Mink Creek No. 000000000277150 | 093463402 | 1961 | Stringer/Multi-beam or Girder | 150 ft | 628 | Fair |
| Local over Creek No. 000000000270751 | 090433004 | 1984 | Slab | 103 ft | 589 | Good |
| FM over Big Sioux River No. 000000000272011 | 90948 | 1967 | Stringer/Multi-beam or Girder | 447 ft | 589 | Fair |
| FM C-38 over Westfield Creek No. 000000000275951 | 092493601 | 1987 | Culvert | 21 ft | 589 | Good |
| FM over Willow Creek No. 000000000276410 | 093442101 | 1967 | Slab | 128 ft | 589 | Fair |
| FM C-70 over Big Whiskey Creek No. 000000000271521 | 090453101 | 1985 | Slab | 125 ft | 559 | Good |
| FM over Muddy Creek No. 000000000271551 | 090453303 | 1985 | Slab | 90 ft | 559 | Good |
| FM over Mink Creek No. 000000000276980 | 093461502 | 1961 | Slab | 103 ft | 559 | Fair |
| FM over Mink Creek No. 000000000277070 | 093462202 | 1961 | Culvert | 22 ft | 559 | Fair |
| FM C-70 over Drainage Ditch No. 000000000363785 | 090453101 | 1995 | Culvert | 21 ft | 559 | Good |
| Marble Ave over Willow Creek No. 000000000274611 | 092451104 | 1994 | Stringer/Multi-beam or Girder | 191 ft | 538 | Good |
| South Ridge RD over Perry Creek No. 000000000271971 | 090473303 | 1978 | Stringer/Multi-beam or Girder | 164 ft | 518 | Good |
| Local over Deep Creek No. 000000000273930 | 092430604 | 1953 | Stringer/Multi-beam or Girder | 125 ft | 510 | Fair |
| FM K-49 over Muddy Creek No. 000000000271411 | 090451502 | 1974 | Slab | 75 ft | 509 | Fair |
| FM K-18 over Broken Kettle Creek No. 000000000273841 | 091482706 | 1979 | Stringer/Multi-beam or Girder | 203 ft | 490 | Fair |
| FM over Broken Kettle Creek No. 000000000271991 | 090480305 | 1976 | Stringer/Multi-beam or Girder | 200 ft | 489 | Good |
| 170th ST (sdb) over Drainage No. 000000000274591 | 1.0 MI N of JCT Ia 3 | 2004 | Culvert | 29 ft | 469 | Good |
| FM C-70 over West Fork Little Sioux No. 000000000271240 | 090443503 | 1961 | Stringer/Multi-beam or Girder | 175 ft | 459 | Fair |
| C70 over Mud Creek No. 000000000271211 | 090443101 | 1999 | Slab | 125 ft | 450 | Good |
| FM C-70 over Elliot Creek No. 000000000271571 | 090453501 | 1999 | Culvert | 27 ft | 450 | Good |
| FM over Big Whiskey Slough No. 000000000276131 | 093432401 | 2008 | Slab | 103 ft | 450 | Good |
| FM over Small No. 000000000276942 | 093461101 | 2006 | Culvert | 26 ft | 450 | Good |
| FM over Small No. 000000000276971 | 093461201 | 1978 | Slab | 87 ft | 450 | Good |
| FM C-60 over Dry Branch No. 000000000270911 | 090440901 | 1992 | Slab | 103 ft | 439 | Good |
| C44 230th ST over Floyd River No. 000000000273271 | 9146110310 | 2019 | Girder and Floorbeam System | 314 ft | 439 | Good |
| FM K-18 over Stream No. 000000000273771 | 091481104 | 1979 | Culvert | 23 ft | 429 | Fair |
| FM over Deer Creek No. 000000000273821 | 091482204 | 2003 | Slab | 116 ft | 429 | Good |
| FM over Mud Creek No. 000000000271351 | 090451203 | 2008 | Slab | 113 ft | 409 | Good |
| FM C-16 over Deep Creek No. 000000000276100 | 093432101 | 1960 | Slab | 102 ft | 409 | Fair |
| Local over Clear Creek No. 000000000274140 | 092433002 | 1959 | Stringer/Multi-beam or Girder | 42 ft | 399 | Fair |
| FM over Drainage Ditch No. 000000000275911 | 092483602 | 1994 | Culvert | 26 ft | 390 | Good |
| Imperial RD over Creek No. 000000000271771 | 090462904 | 1977 | Culvert | 25 ft | 379 | Good |
| FM K-42 over Mink Creek No. 000000000274911 | 092461502 | 1985 | Stringer/Multi-beam or Girder | 151 ft | 359 | Good |
| 190th ST over Drainage No. 000000000275005 | 9246220210 | 1935 | Culvert | 26 ft | 359 | Good |
| FM C-44 over Minnie Brook No. 000000000272941 | 091450901 | 1977 | Slab | 100 ft | 339 | Good |
| 325th ST over Perry Creek No. 000000000271911 | 090472705 | 2006 | Slab | 125 ft | 319 | Good |
| Local over Willow Creek No. 000000000276540 | 093443602 | 1967 | Stringer/Multi-beam or Girder | 43 ft | 319 | Fair |
| FM over Indian Creek No. 000000000277241 | 093470801 | 1984 | Slab | 128 ft | 319 | Good |
| C66 310th ST over Little Sioux River No. 000000000270651 | 9043190110 | 2018 | Stringer/Multi-beam or Girder | 204 ft | 309 | Good |
| FM over Johns Creek No. 000000000271081 | 090442409 | 1977 | Slab | 175 ft | 309 | Good |
| FM C-60 over Deep Creek No. 000000000270531 | 090430801 | 1990 | Slab | 113 ft | 290 | Good |
| FM C-60 over West Fork Little Sioux No. 000000000270540 | 090431001 | 1963 | Stringer/Multi-beam or Girder | 202 ft | 290 | Fair |
| FM over Ditch No. 000000000270561 | 090431101 | 1991 | Culvert | 33 ft | 290 | Good |
| FM over W Br Floyd River No. 000000000276790 | 093453001 | 1968 | Stringer/Multi-beam or Girder | 150 ft | 270 | Fair |
| FM over Johns Creek No. 000000000270931 | 090441201 | 1971 | Slab | 127 ft | 259 | Fair |
| FM over Small Stream No. 000000000273541 | 091471101 | 1987 | Culvert | 24 ft | 259 | Good |
| FM over Perry Creek No. 000000000273551 | 091471201 | 1995 | Slab | 88 ft | 259 | Good |
| FM over Floyd River No. 000000000276761 | 9345240310 | 2010 | Stringer/Multi-beam or Girder | 192 ft | 249 | Good |
| FM over Drainage No. 000000000363765 | 093481003 | 1964 | Culvert | 25 ft | 240 | Good |
| E 2nd ST over Drainage No. 000000000009873 | 924306 | 2015 | Culvert | 26 ft | 232 | Good |
| FM over Indian Creek No. 000000000277581 | 093481202 | 1971 | Slab | 125 ft | 219 | Fair |
| 322nd ST over Br of W F Little Sioux No. 000000000271101 | 090442503 | 1998 | Slab | 112 ft | 210 | Good |
| L-22 over W Fork Little Sioux Riv No. 000000000276135 | 093432502 | 1974 | Culvert | 21 ft | 210 | Good |
| FM over Broken Kettle Creek No. 000000000277461 | 9347330110 | 2010 | Slab | 93 ft | 199 | Good |
| FM K-42 over Carter Creek No. 000000000271600 | 090460202 | 1941 | Stringer/Multi-beam or Girder | 42 ft | 190 | Poor |
| FM K-42 over Carter Creek No. 000000000271610 | 090460202 | 1966 | Stringer/Multi-beam or Girder | 55 ft | 190 | Poor |
| 250th ST over Mud Creek No. 000000000272661 | 091442001 | 2000 | Slab | 88 ft | 190 | Good |
| FM C-44 over Small No. 000000000273041 | 091452301 | 1978 | Culvert | 36 ft | 190 | Fair |
| FM over Drainage No. 000000000273280 | 091461202 | 1966 | Stringer/Multi-beam or Girder | 42 ft | 190 | Fair |
| FM over Drainage No. 000000000273330 | 091462303 | 1966 | Culvert | 21 ft | 190 | Fair |
| FM over Mink Creek No. 000000000277120 | 093462801 | 1967 | Slab | 100 ft | 190 | Fair |
| FM over Westfield Creek No. 000000000275691 | 092481702 | 1988 | Slab | 128 ft | 180 | Good |
| FM K-13 over Westfield Creek No. 000000000275831 | 092482902 | 1988 | Culvert | 34 ft | 180 | Good |
| Fox Ave over Perry Creek No. 000000000271961 | 090473308 | 1983 | Stringer/Multi-beam or Girder | 139 ft | 170 | Good |
| FM over Perry Creek No. 000000000271840 | 090470901 | 1940 | Culvert | 32 ft | 159 | Fair |
| Lake Ave over Plymouth Creek No. 000000000272911 | 091450502 | 1977 | Slab | 125 ft | 159 | Good |
| FM C-43 over Broken Kettle Creek No. 000000000273830 | 091482205 | 1960 | Stringer/Multi-beam or Girder | 150 ft | 159 | Poor |
| 200th ST over Small Stream No. 000000000274701 | 092452703 | 1985 | Culvert | 26 ft | 159 | Good |
| FM over Rathbun Creek No. 000000000272231 | 091431901 | 1986 | Slab | 88 ft | 150 | Good |
| FM C-44 over Dry Branch No. 000000000272691 | 091442101 | 1998 | Culvert | 25 ft | 150 | Good |
| FM C-44 over Johns Creek No. 000000000272710 | 091442401 | 1985 | Slab | 112 ft | 150 | Good |
| FM over Drainage Ditch No. 000000000270700 | 090432702 | 1932 | Culvert | 38 ft | 139 | Fair |
| FM over Drainage Ditch No. 000000000272250 | 091432101 | 1933 | Culvert | 24 ft | 139 | Fair |
| FM over Little Sioux No. 000000000272261 | 091432301 | 1991 | Slab | 125 ft | 139 | Good |
| L-22 over Little Sioux River No. 000000000274061 | 092432402 | 1974 | Slab | 100 ft | 139 | Fair |
| Quest Ave over West Fork Little Sioux No. 000000000270660 | 090431902 | 1967 | Stringer/Multi-beam or Girder | 175 ft | 131 | Good |
| 160th ST over Floyd River No. 000000000274561 | 9245040110 | 2013 | Stringer/Multi-beam or Girder | 229 ft | 131 | Good |
| 150th ST over Floyd River No. 000000000276840 | 093453403 | 1954 | Stringer/Multi-beam or Girder | 175 ft | 131 | Poor |
| FM C-44 over Broken Kettle Creek No. 000000000273780 | 091481105 | 1965 | Stringer/Multi-beam or Girder | 150 ft | 120 | Fair |
| 165th ST over West Branch Floyd River No. 000000000274580 | 092450603 | 1911 | Arch - Deck | 73 ft | 120 | Poor |
| FM K-64 over Drainage No. 000000000271005 | 090441702 | 1973 | Slab | 115 ft | 110 | Fair |
| Otter Ave over Deep Creek No. 000000000274281 | 092440502 | 2007 | Slab | 146 ft | 100 | Good |
| Nature Ave over Plymouth Creek No. 000000000274770 | 092453602 | 1900 | Stringer/Multi-beam or Girder | 46 ft | 100 | Fair |
| 280th ST over Drainage No. 000000000271591 | 090460201 | 1990 | Slab | 78 ft | 80 | Good |
| 270th ST over Perry Creek No. 000000000273691 | 091473501 | 1986 | Slab | 128 ft | 80 | Good |
Structure types in Plymouth County
| Stringer/Multi-beam or Girder | 190 | 44.2% |
| Slab | 143 | 33.3% |
| Culvert | 84 | 19.5% |
| Truss - Thru | 11 | 2.6% |
| Arch - Deck | 1 | 0.2% |
| Girder and Floorbeam System | 1 | 0.2% |
Other counties in Iowa
- Adair County 303
- Adams County 185
- Allamakee County 197
- Appanoose County 185
- Audubon County 204
- Benton County 373
- Black Hawk County 489
- Boone County 134
- Bremer County 267
- Buchanan County 320
- Buena Vista County 157
- Butler County 287
- Calhoun County 198
- Carroll County 249
- Cass County 296
- Cedar County 300
- Cerro Gordo County 268
- Cherokee County 244
- Chickasaw County 304
- Clarke County 168
- Clay County 154
- Clayton County 257
- Clinton County 375
- Crawford County 301
- Dallas County 206
- Davis County 163
- Decatur County 199
- Delaware County 294
- Des Moines County 173
- Dickinson County 83
- Dubuque County 346
- Emmet County 78
- Fayette County 362
- Floyd County 214
- Franklin County 227
- Fremont County 179
- Greene County 168
- Grundy County 288
- Guthrie County 263
- Hamilton County 165
- Hancock County 135
- Hardin County 241
- Harrison County 222
- Henry County 173
- Howard County 212
- Humboldt County 87
- Ida County 182
- Iowa County 239
- Jackson County 252
- Jasper County 382
- Jefferson County 156
- Johnson County 376
- Jones County 230
- Keokuk County 183
- Kossuth County 266
- Lee County 214
- Linn County 511
- Louisa County 151
- Lucas County 198
- Lyon County 273
- Madison County 225
- Mahaska County 221
- Marion County 217
- Marshall County 303
- Mills County 184
- Mitchell County 167
- Monona County 160
- Monroe County 131
- Montgomery County 209
- Muscatine County 144
- O'Brien County 263
- Osceola County 184
- Page County 191
- Palo Alto County 135
- Pocahontas County 198
- Polk County 548
- Pottawattamie County 557
- Poweshiek County 243
- Ringgold County 215
- Sac County 221
- Scott County 291
- Shelby County 207
- Sioux County 448
- Story County 302
- Tama County 337
- Taylor County 220
- Union County 172
- Van Buren County 155
- Wapello County 190
- Warren County 238
- Washington County 207
- Wayne County 165
- Webster County 190
- Winnebago County 54
- Winneshiek County 342
- Woodbury County 455
- Worth County 116
- Wright County 175