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United States | Iowa | O'Brien | Waterman Creek, ~ 4 miles SE of Sutherland, at Waterman Prairie WMA | drainage:Little Sioux R. -> Missouri R. | 94 N | 39 W | 23

United States | Iowa | Keokuk | South Fork English River, ~ 1.25 miles N of South English, along Hwy 149. | drainage:English R. -> Iowa R. -> Mississippi R. | 77 N | 11 W | 14

United States | Iowa | Marion | Des Moines River, downriver from Red Rock Dam. | drainage:Mississippi River | 76 N | 19 W | 30

United States | Iowa | Buchanan | Lime Creek, at Crumbacher Wildlife Area, ~ 7 miles SE of Jesup | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 88 N | 10 W | 14

United States | Minnesota | Cook | Stump River, at Arrowhead Trail (aka Rt 16), ~ 2.6 miles SSE of Little John Lake put-in | drainage:Lake Superior | 64 N | 3 E | 22

United States | Iowa | Butler | West Fork Cedar River at Big Marsh WMA, ~ 4.5 miles SW of Allison; at end of Jackson Ave. ID verfified in March 2022 by G. Gelwicks and G. Simmons, Iowa DNR Fisheries Bureau, Manchester, IA (trunk myomere count of 67). | d

United States | Iowa | Linn | Wanatee Creek at Wanatee Park, Marion, Iowa, 0.6 miles SE of Red Cedar Lodge in park. | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 83 N | 6 W | 8

United States | Iowa | Sioux | Spring Creek, ~ 3 miles ESE of Hawarden, at Cleveland Ave. | drainage:Big Sioux R -> Missouri R. | 94 N | 47 W | 5

United States | Iowa | Page | West Nodaway River at Clarinda, dstr. lowhead dam; upstr. J35 | drainage:Missouri River | 69 N | 36 W | 32

United States | Iowa | Lyon | Little Rock River, ~ 1 mile NE of Little Rock, dstr. McKinley Ave. | drainage:Rock R. -> Big Sioux R. -> Missouri R. | 100 N | 43 W | 25

United States | Iowa | Clay | Elk Lake, ~ 3 miles SSW of Ruthven, at lake access; along shoreline | drainage:Little Sioux R. -> Missouri R. | 95 N | 35 W | 1

United States | Iowa | Harrison | Allen Creek, ~ 1.5 miles NW of Magnolia, at Harvard Trail | drainage:Missouri River | 80 N | 44 W | 25

United States | Iowa | Clay | Little Meadow Creek, ~ 2.5 miles NE of Spencer at 240th Ave. | drainage:Little Sioux R. -> Missouri R. | 97 N | 36 W | 29

United States | Iowa | Sioux | Dry Run Creek, ~ 3.5 miles WNW of Rock Valley, at 300th St. | drainage:Rock R. -> Big Sioux R. -> Missouri R. | 97 N | 47 W | 23

United States | Iowa | Lyon | Mud Creek, ~ 7.5 miles SW of Rock Rapids, at 190th St. | drainage:Rock R. -> Big Sioux R. -> Missouri R. | 99 N | 46 W | 29

United States | Iowa | Woodbury | Little Sioux River, at Correctionville, at 11th St. (aka, U.S. Hwy 20) | drainage:Missouri River | 89 N | 42 W | 34

United States | Iowa | Lee | unnamed creek, ~ 3 miles N of Keokuk | drainage:Mississippi River | 66 N | 5 W | 35

United States | Iowa | Black Hawk | Dry Run Creek, UNI Campus, near bridge across stream | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 89 N | 14 W | 24

United States | Iowa | Dickinson | Little Sioux River at Judd Wildlife Area, ~ 3 miles SW of Milford, dstr 250th St. | drainage:Missouri River | 98 N | 37 W | 27

United States | Iowa | Linn | Indian Creek, at Indian Creek Nature Center, upstr footbridge, Otis Road | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 83 N | 6 W | 30

United States | Iowa | Black Hawk | Cedar River, at Cedar Falls, IA, just above jct with Snag Creek | drainage:Iowa R. -> Mississippi R. | 89 N | 14 W | 12

United States | Minnesota | Dodge | Salem Creek, ~ 4 miles SSE of Kasson | drainage:Zumbro R. -> Mississippi R. | 106 N | 22 W | 22

United States | Iowa | Linn | tribuary of Buffalo Creek at Coggon, IA | drainage:Wapsipinicon R. -> Mississippi R. | 86 N | 6 W | 11

United States | Iowa | Harrison | Tyson Bend Wildlife Area, ~ 6.5 miles SW of Mondamin, IA | drainage:Missouri River | 79 N | 45 W | 20

United States | Iowa | Lyon | Big Sioux River at Gitchie Manitou State Park, Lyon Co., IA | drainage:Missouri River | 100 N | 49 W | 11

United States | Iowa | Clayton | Mississippi River above Guttenberg, IA | drainage:Mississippi River | 92 N | 2 W | 5

United States | Iowa | Clayton | spillway of wetland dam west of Mississippi River at Marquette, iA | drainage:Mississippi River | 95 N | 3 W | 15

United States | Iowa | Bremer | unnamed trib to Shell Rock River, ~ 2.5 miles N of Janesville | drainage:Shell Rock R. -> Cedar R. -> Iowa R. -> Mississippi R. | 91 N | 14 W | 21

United States | Iowa | Palo Alto | West Fork Des Moines River, ~ 5.5 miles SSE of Emmetsburg | drainage:Des Moines R. -> Mississippi R. | 95 N | 32 W | 21

United States | Iowa | Dickinson | West Okoboji Lake, Little Millers Bay | drainage:Little Sioux R. -> Missouri R. | 99 N | 37 W | 23

United States | Iowa | Dickinson | West Lake Okoboji, Little Millers Bay | drainage:Little Sioux R. -> Missouri R. | 99 N | 37 W | 23

United States | Iowa | Osceola | Ocheyedan Rver, 2 miles W of Ocheyedan on Hwy 9 then 1.25 mi. south | drainage:Little Sioux R. -> Missouri R. | 99 N | 40 W | 8

United States | Iowa | Black Hawk | Cut-off pools along Snag Creek near Cedar Falls, IA | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 89 N | 14 W | 2

United States | Iowa | Lyon | Rock River, ~ 2 miles N of Rock Rapids | drainage:Big Sioux R -> Missouri R. | 100 N | 45 W | 28

United States | Iowa | Clayton | Roberts Creek, at Hwy 13, ~ 1 mile north of Elkader | drainage:Turkey R. -> Mississippi R. | 93 N | 5 W | 13

United States | Iowa | Jones | Jurdan Creek at Indian Bluffs WMA, ~ 6 miles ESE of Monticello | drainage:Maquoketa R -> Mississippi R. | 86 N | 2 W | 33

United States | Iowa | Clayton | backwater of the Upper Mississippi River (aka Spring Lake) ~ 7 miles NNE of Luxemburg. | drainage:Mississippi River | 91 N | 1 W | 18

United States | Wisconsin | Buffalo | Mississippi River, Pool 5, Fountain City Bay, ~ 2.5 miles NW of Fountain City | drainage:Mississippi River | 19 N | 12 W | 1

United States | Iowa | Monona | Missouri River, Louisville Bend WMA, ag field on N side of road, ~ 2.5 miles W of Blencoe; ~ 1 mile W of Hazel Ave. | drainage:Missouri River | 82 N | 45 W | 6

United States | Iowa | Clinton | Rock Creek, ~ 2 miles E of Low Moor, upstr 49th Ave, aka 54th St., aka 400th Ave | drainage:Mississippi River | 81 N | 5 E | 25

United States | Iowa | Howard | Beaver Creek, ~ 5.5 miles W of Lime Springs, dstr. 50th St. | drainage:Turkey R. -> Mississippi R. | 100 N | 13 W | 29

United States | Iowa | Buchanan | Bear Creek, ~ 4 miles WSW of Rowley, upstream from 305th St. | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 87 N | 9 W | 17

United States | Iowa | Howard | Little Wapsipinicon River, ~ 3.2 miles NW of Elma, at outflow of Lylah's Marsh | drainage:Wapsipinicon R. -> Mississippi R. | 98 N | 14 W | 26

United States | Iowa | Hardin | Honey Creek, at J.L. Reece County Park, ~ 2 miles SSW of New Providence | drainage:Iowa R. -> Mississippi R. | 86 N | 20 W | 16

United States | Iowa | Dickinson | West Okoboji Lake, Miller's Bay | drainage:Little Sioux R. -> Missouri R. | 99 N | 37 W | 23

United States | Iowa | Marshall | Honey Creek, ~ 4.5 miles WNW of Liscomb, upstr. 105th St. | drainage:Iowa R. -> Mississippi R. | 85 N | 19 W | 6

United States | Iowa | Buena Vista | Fox Run, ~ 2 miles WSW of Linn Grove, at 420th Ave. | drainage:Little Sioux R. -> Missouri R. | 93 N | 38 W | 12

United States | Iowa | Buena Vista | Brooke Creek, ~ 8.75 miles SW of Sioux Rapids, at Co Rd C-25 (aka, 480th St.) | drainage:Little Sioux R. -> Missouri R. | 92 N | 38 W | 1

United States | Iowa | Woodbury | Bacon Creek, ~ 1 mile SE of Correctionville, at Pocahontas Ave. | drainage:Little Sioux R. -> Missouri R. | 88 N | 42 W | 6

United States | Iowa | Lyon | Rat Creek, ~ 6 miles SSE of George, at Larch Ave. | drainage:Rock R. -> Big Sioux R. -> Missouri R. | 98 N | 43 W | 32