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United States | Iowa | Grundy | Blackhawk Creek, 2.5 mi SE of Dike | drainage:Blackhawk Creek | 88N | 15W | 11

United States | Iowa | Hardin | South Fork Iowa River, 5 miles ESE of Buckeye, IA | drainage:Iowa R. -> Mississippi R. | 88N | 21W | 27

United States | Utah | Rich

United States | Iowa | Louisa | Honey Creek, 4 mi S of Wapello | drainage:Honey Creek | 73N | 3W | 14

United States | Iowa | Cerro Gordo | Clear Lake at Clausen's Cove | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 96N | 22W | 28

United States | Iowa | Grundy

United States | Iowa | Buena Vista

United States | Iowa | Johnson

United States | Iowa | Mitchell | Spring Creek, 1 mi E of Osage, 0.25 mi S of Hwy 218 | drainage:Spring Creek | 98N | 16W | 29

United States | Iowa | Boone | Peas Creek at Ledges State Park near Boone, IA | drainage:Des Moines R. -> Mississippi R. | 83N | 26W | 16

United States | Iowa | Johnson | Clear Creek, 0.25 mi W of Tiffin | drainage:Clear Creek | 80N | 7W | 32

United States | Iowa | Chickasaw | Lower Cedar River, 2 mi W of Ionia | drainage:Cedar River | 95N | 14W | 21

United States | Iowa | Washington | English River, 1 mi N of Wellman | drainage:English River | 77N | 8W | 7

United States | Iowa | Linn | Cedar River at Palo | drainage:Cedar River | 84N | 8W | 27

United States | Utah | Beaver

United States | Iowa | Louisa | Cone Marsh outflow, 7 mi N of Columbus Junction | 76N | 5W | 14

United States | Iowa | Poweshiek | North Fork of English River, 3 mi W of Guernsey | drainage:English River | 79N | 13W | 18

United States | Iowa | Johnson | Deer Creek, 4 mi W and 0.25 mi N of Frytown | drainage:Deer Creek | 78N | 8W | 7

United States | Minnesota | Saint Louis | Finger Lake, Boundary Waters Canoe Area Wilderness, ~ 30 miles NW of Ely | drainage:Rainy R. -> Lake of the Woods -> Hudson Bay | 67 N | 14 W | 18

United States | Iowa | Clay | Stoney Creek at Ocheyedan WMA, ~ 4 miles W of Spencer | drainage:Little Sioux R. -> Missouri R. | 96 N | 37 W | 8

United States | Iowa | Hardin | Honey Creek, ~ 1.5 miles SSW of New Providence, IA. | drainage:Iowa R. -> Mississippi R. | 86N | 20W | 16

United States | Iowa | Boone | Des Moines River at YMCA Camp. ~4.5 miles NNW of Boone, IA. | drainage:Des Moines R. -> Mississippi R. | 84N | 27W | 1

United States | Iowa | Bremer | East Fork Wapsipinicon River at Sweet Marsh WMA, 2.6 miles NNE of Tripoli | drainage:Wapsipinicon R. -> Mississippi R. | 93 N | 12 W | 26

United States | Iowa | Monona | Missouri River, Tieville Bend: flooded; ~ 2.5 miles NE of Decatur, NE | drainage:Missouri River | 83 N | 46 W | 5

United States | Iowa | Harrison | Missouri River, California Bend backwater, ~ 4.5 miles SW of Modale | drainage:Missouri River | 78 N | 46 W | 12

United States | Iowa | Harrison | Missouri River, Deer Island, ~ 9 miles W of Pisgah | drainage:Missouri River | 81 N | 45 W | 17

United States | Iowa | Worth | Elk Creek, ~ 3.25 miles NW of Kensett | drainage:Shell Rock R. -> Cedar R. -> Iowa R. -> Mississippi R. | 99 N | 21 W | 24

United States | Iowa | Dubuque | North Fork Maquoketa River, ~ 1.5 miles SSW of New Vienna, at New Wine Pk. | drainage:Maquoketa R. -> Mississippi R. | 89 N | 2 W | 18

United States | Iowa | Jones | Silver Creek, ~ 5.5 miles WNW of Monticello, upstr. CoRd. D62 | drainage:Maquoketa R. -> Mississippi R. | 86 N | 4 W | 10

United States | Iowa | Delaware | Buck Creek, ~ 2 miles WNW of Hopkinton, dstr. 260th Ave. | drainage:Maquoketa R. -> Mississippi R. | 87 N | 4 W | 10

United States | Iowa | Black Hawk | Miller Creek, ~ 2.5 miles SSW of Gilbertville, dstr Miller Creek Rd. | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 87 N | 12 W | 4

United States | Iowa | Bremer | Baskins Run, ~ 3 miles E of Waverly, dstr. 220th St. | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 91 N | 13 W | 5

United States | Iowa | Linn | West Otter Creek, 0.5 miles N of Toddville, upstr. Otter Creek Road | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 84 N | 8 W | 12

United States | Iowa | Buchanan | Tributary of Bear Creek, 4 mi E of Brandon | drainage:Bear Creek | 87N | 9W | 20

United States | Iowa | Worth | Drainage Ditch 11, 3.5 mi E of Northwood | 100N | 19W | 31

United States | Iowa | Des Moines | Drainage ditch, 5 mi NE Burlington | 71N | 2W | 36

United States | Maryland | Kent/Queen Anne's Counties

United States | Iowa | Floyd | Beemis Creek, ~ 2.5 miles W of Marble Rock, upstr Foothill Ave. | drainage:Shell Rock R. -> Cedar R. -> Iowa R. -> Mississippi R. | 94 N | 18 W | 11

United States | Iowa | Butler | Beaver Creek, ~ 3.75 miles elf Parkersburg, upstr Ridge Ave. | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 90 N | 16 W | 26

United States | Illinois | Hancock

United States | Iowa | Linn | East Otter Creek, ~ 2 miles NW of Alburnett | drainage:Cedar R. -> Iowa R. -> Mississippi R. | 85 N | 7 W | 21

United States | Florida | Levy

United States | Maine | Waldo

United States | Iowa | Iowa | Iowa River, 8 mi W and 3 mi N of Marengo | drainage:Iowa River | 81N | 12W | 9

United States | Iowa | Iowa | Bear Creek, 2 mi SW of Marengo | drainage:Bear Creek | 81N | 11W | 34

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 | Bremer

United States | Iowa | O'Brien | Waterman Creek, ~ 3 miles ENE of Sutherland, between bridges on Co. Rd. B53 and dirt road. | drainage:Little Sioux R. -> Missouri R. | 94 N | 39 W | 3

United States | Iowa | Greene | restored oxbow of Cedar Creek, ~ 5 miles SW of Churdan, dstr (south) of 140th St. | drainage:Raccoon R. -> Des Moines R. -> Mississippi R. | 85 N | 32 W | 28

United States | Iowa | Butler | Johnson Creek, 4 mi NE of Aplington | drainage:Johnson Creek | 90N | 17W | 4