NWS AHPS

NOAA
National Oceanic and Atomospheric Administration http://www.noaa.gov

National Weather Service
National Weather Service www.weather.gov

Little Nemaha River near Auburn (ABRN1)
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South Skunk River near Ames US 30 (AESI4)
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Silver Creek at Sioux Falls (AGCS2)
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East Fork Des Moines River near Algona (AGNI4)

Cedar River near St. Ansgar (AGRI4)

Skunk River at Augusta (AGSI4)

Platte River near Agency (AGYM7)

Fourmile Creek (Central IA) near Ankeny US 69 (AKNI4)

Big Sioux River at Akron (AKRI4)

South River (South Central IA) near Ackworth (AKWI4)

Fourmile Creek (Central IA) near IFC--Altoona NE 54th Ave (ALFI4)

Mississippi River below Lock and Dam 4 - Alma (ALMW3)

Cedar River at Waterloo (ALOI4)

Floyd River at Alton (ALTI4)

South Fork Zumbro River near Oronoco 4SE (ALZM5)

Mississippi River at Alma - Pool 5 (AMAW3)

Ioway Creek at IFC--Ames S Duff Ave (AMDI4)

South Skunk River near Ames W Riverside Rd (AMEI4)

Ioway Creek at IFC--Ames Stange Rd (AMQI4)

South Skunk River at IFC--Ames E 13th St (AMRI4)

Ioway Creek at Ames Lincoln Way (AMWI4)

Fourmile Creek (Central IA) at IFC--Ankeny NE 47th St (ANFI4)

Fourmile Creek (Central IA) near Ankeny NE 86th Ave (ANKI4)

Wapsipinicon River at Anamosa Shaw Rd (ANSI4)

Apple River near Hanover (APRI2)

Trempealeau River at Arcadia (ARCW3)

Platte River near Ashland (ASLN1)

Cedar River near Austin (ASNM5)

Wahoo Creek at Ashland (ASNN1)

Cedar River at Austin (ASTM5)

Salt Creek near Ashland (ASTN1)

East Nishnabotna River near Atlantic (ATCI4)

Fourmile Creek (Central IA) near Altoona I-80 (ATNI4)

West Fork Des Moines River near Avoca (AVOM5)

Baraboo River near Baraboo (BABW3)

Little Blue River near Barnes (BANK1)

Big Blue River near Barneston (BARN1)

Middle Raccoon River (IA) near Bayard (BAYI4)

Yellow River (WI) at Babcock (BBCW3)

Baraboo River at West Baraboo (BBOW3)

Big Sioux River near Brandon (BBSS2)

Beaver Creek (SD) at Canton (BCCS2)

Pecatonica River near Blanchardville (BCHW3)

Brule Creek near Richland (BCKS2)

Bear Creek (South Central IA) near Ottumwa US 34 (BCOI4)

East Fork 102 River at Bedford (BDFI4)

Illinois River at Beardstown (BEAI2)

Big Blue River at Beatrice (BEAN1)

Big Papillion Creek near Bennington (BEBN1)

Blue Earth River at Blue Earth (CR6) (BEHM5)

Black Hawk Lake (Western IA) at Lake View (BHLI4)

Big Creek Ponding Area (Central IA) near Polk City (BIGI4)

Big Creek (WI) near Rockland - Herman Road (BIGW3)

Wisconsin River below Biron Dam (BIRW3)

Missouri River near Blair (BLAN1)

Big Papillion Creek near Blair (BLBN1)

Black Earth Creek at Black Earth (BLEW3)

Upper Iowa River at Bluffton (BLFI4)

South Fork Iowa River near Blairsburg (BLII4)

Big Blue River at Blue Rapids (BLRK1)

Mississippi River at Bellevue (BLVI4)

Fox River (IA/MO) at Bloomfield (BMFI4)

Burr Oak Creek above Perkins (BOCI4)

Bow Creek near Wynot (BOWN1)

Iowa River at Belle Plaine (BPLI4)

Big Sioux River near Bruce (BRCS2)

Black River (WI) at Black River Falls (BRFW3)

Big Sioux River near Brookings (BRKS2)

Mississippi River at Burlington (BRLI4)

Nodaway River near Burlington Junction (BRLM7)

Missouri River at Brownville (BRON1)

Ioway Creek near IFC--Story City 120th St (BSCI4)

Big Sioux River above Flandreau (BSFS2)

Big Sioux River near Jefferson (BSJS2)

Ioway Creek near IFC--Gilbert 160th St (BSQI4)

Big Sioux River near Richland (BSRS2)

Cedar Creek (South Central IA) near Bussey (BSSI4)

West Main Drainage Ditch 1 & 2 (North Central IA) near Britt (BTDI4)

Grant River at Burton (BTNW3)

East Branch Blue Earth River near Blue Earth 1N (BUEM5)

Galena River at Buncombe (BUNW3)

Beaver Creek (WI) near Sparta (BVCW3)

Mississippi River at Canton Lock and Dam 20 (CANM7)

Big Sioux River above Canton (CBSS2)

Cedar River at Charles City (CCYI4)

Sangamon River near Chandlerville (CDLI2)

Cedar River at Cedar Bluff (CEBI4)

Cedar River at Cedar Falls (CEDI4)

Cooper Creek (South Central IA) at Centerville (CENI4)

Rock Creek near Ceresco (CERN1)

Cannon River at 9th St Bridge in Cannon Falls (CFLM5)

Little La Crosse River at Melvina - County Road F (CFMW3)

South Skunk River at Colfax (CFXI4)

Iowa River at Chelsea (CHEI4)

Little Sioux River at Cherokee (CHKI4)

Chariton River near Chariton (CHTI4)

Grand River near Chillicothe (CHZM7)

Cedar River at Cedar Rapids (CIDI4)

Iowa River at Columbus Jct (CJTI4)

Clear Lake (North Central IA) at Clear Lake (CLKI4)

Middle Raccoon River Tributary (IA) near Carroll (CLLI4)

La Moine River at Colmar (CLMI2)

Walnut Creek (Central IA) at IFC--Clive NW 100th St (CLOI4)

Stein Creek (Central IA) near Clutier (CLTI4)

Walnut Creek (Central IA) at Clive I-80/35 (CLVI4)

South Branch Root River at Carimona (CMAM5)

Muddy Creek (IA) at Coralville (CMCI4)

Mississippi River at Camanche (CMMI4)

Rock River at Como (CMOI2)

Turkey River at Clermont (CMTI4)

Cedar River near Conesville (CNEI4)

Little Cannon River above Cannon Falls (CNFM5)

Prairie Creek (MN) near Cannon Falls 4WSW (CNPM5)

East Nishnabotna River near Coburg (COBI4)

Sleepy Eye Creek near Cobden CR8 (COBM5)

Cook Creek near Ontario - Niagara Ave (COOW3)

Illinois River at Copperas Creek (COPI2)

Split Rock Creek at Corson (COSS2)

Clear Creek (IA) near Coralville (CRAI4)

Cedar River near Orchard (CROI4)

Wisconsin River at Castle Rock Dam (CROW3)

Little Sioux River at Correctionville (CRRI4)

Little Cottonwood River near Courtland 2S (CRTM5)

Big Blue River near Crete (CRTN1)

Iowa River above Coralville Dam (CRVI4)

Ioway Creek near Ames Cameron School Rd (CSRI4)

Walnut Creek (Central IA) at IFC--Clive NW 128th St (CWAI4)

Willow Creek (North Central IA) near Cornell (CWCI4)

White Fox Creek at Clarion (CWFI4)

East Fork Des Moines River at Dakota City (DAKI4)

Pecatonica River at Darlington (DARW3)

Mississippi River at Dubuque (Railroad Bridge) (DBQI4)

Upper Iowa River at Dorchester (DCHI4)

Main Ditch Number Six at Levee Road 3 miles SSW of Hamburg IA (DCHM7)

Missouri River at Decatur (DCTN1)

Trempealeau River at Dodge (DDGW3)

Deadmans Run at Lincoln (38th Street) (DEDN1)

Upper Iowa River at Decorah (DEHI4)

Raccoon River (Central IA) at Des Moines Fleur Dr (DEMI4)

Cardwell Branch at Yankee Hill Reservoir (DENN1)

Deep River (IA) at Deep River (DEPI4)

Big Sioux River near Dell Rapids (DERS2)

Des Moines River at Des Moines SE 6th St (DESI4)

Wapsipinicon River near DeWitt (DEWI4)

Turkey Creek near DeWitt (DEWN1)

Fourmile Creek (Central IA) at Des Moines Easton Blvd (DFMI4)

Duck Creek above Davenport Kimberly Rd (DKII4)

Mississippi River at Dubuque (LD11) (DLDI4)

White Breast Creek (Southern IA) near Melcher-Dallas (DLLI4)

Des Moines River at Des Moines 2nd Ave (DMOI4)

Raccoon River (Central IA) at Des Moines IA 28 (DMWI4)

Boyer River near Dunlap (DNLI4)

Dobbins Creek near Austin (DOBM5)

Walnut Creek (Central IA) at Des Moines 63rd St (DOSI4)

Big Sioux River above Dell Rapids (DRBS2)

West Fork Big Blue River near Dorchester (DRGN1)

Holmes Creek at Conestoga Lake (DTON1)

Thompson River (IA/MO) at Davis City (DVSI4)

Vermillion River near Davis (DVSS2)

Waterloo Creek near Dorchester (DWCI4)

Wolf Creek (East Central IA) near Dysart (DYSI4)

East Branch West Nishnabotna River near Avoca (EAVI4)

Salt Creek (East Central IA) near Elberon (EBRI4)

North Fork Whitewater River near Elba (EBWM5)

Elliott Creek at Lawton (ECLI4)

Turkey River near Eldorado (EDRI4)

Des Moines River near Eddyville (EDYI4)

North Raccoon River (IA) near Jefferson (EFWI4)

Big Sioux River near Egan (EGAS2)

East Nishnabotna River near Riverton (EISI4)

Elk Creek (WI) near Elk Creek (EKCW3)

Turkey River at Elkader (EKDI4)

West Papillion Creek at Elkhorn (EKWN1)

East Nishnabotna River near Elliott (ELTI4)

Indian Creek at Emerson (EMEI4)

Indian Creek above Emerson (EMNI4)

West Fork Des Moines River at Emmetsburg (EMTI4)

East Nodaway River at Highway 2 near Clarinda (ENOI4)

Mississippi River at Keokuk (EOKI4)

Roberts Creek near Elkader (ERCI4)

North Branch of Middle Creek at Pawnee Lake (ERLN1)

South Skunk River near Ames Hwy E18 (ESKI4)

Ioway Creek near Ames Hwy E18 (ESQI4)

West Fork Des Moines River at Estherville (ESVI4)

East Tarkio Creek near Stanton (ETRI4)

East Fork Vermillion River below Montrose (EVMS2)

West Papillion Creek at Pacific Street at Omaha (EWDN1)

Middle Fabius River near Ewing (EWMM7)

North Fabius River near Ewing (EWNM7)

Mississippi River above Fairport (FAII4)

Papillion Creek at Fort Crook (FCKN1)

Flandreau Creek above Flandreau (FCRS2)

Fondulac Creek near East Peoria (FDCI2)

Pecatonica River at Freeport (FEEI2)

Tarkio River near Fairfax (FFXM7)

Black Vermillion River at Frankfort (FKFK1)

Big Nemaha River at Falls City (FLLN1)

Middle Branch Root River at Fillmore (FLMM5)

North Fork Maquoketa River at Fulton (FLNI4)

Mississippi River at Fulton (FLTI2)

Lizard Creek (Northern IA) near Fort Dodge (FLZI4)

Coles Valley Creek near Fort McCoy - Hawk Road (FMCW3)

Mississippi River at Fort Madison (FMDI4)

West Fork Cedar River at Finchford (FNHI4)

Des Moines River at Fort Dodge (FODI4)

Straight River near Faribault (FRBM5)

Little Blue River near Fairbury (FRBN1)

Wells Creek (MN) near Frontenac (FRCM5)

Upper Iowa River near Freeport (FREI4)

Platte River at Fremont (FREN1)

Cannon River at Hwy 29 below Faribault (FRLM5)

Brockcamp Creek near Festina (FSTI4)

Rogers Creek at Fort Atkinson (FTAI4)

Turkey River at Fort Atkinson (FTKI4)

Big Sioux River at Fairview (FVWS2)

Black River (WI) at Galesville (GALW3)

Grand River near Gallatin (GAZM7)

Shell Rock River (Northeast IA) near Gordonsville 1W (GDVM5)

Green River (IL) near Geneseo (GENI2)

Mississippi River below Lock and Dam 8 - Genoa (GENW3)

Mississippi River at Gregory Landing (GGYM7)

Buttrick Creek (Central IA) near Grand Junction (GJTI4)

Mississippi River at Gladstone (GLDI2)

Boone River (North Central IA) near Goldfield (GLDI4)

Kickapoo River at Gays Mills (GMIW3)

South Branch Root River near Grand Meadow (GMWM5)

Mackinaw River near Green Valley (GNVI2)

Turkey River at Garber (GRBI4)

Watonwan River near Garden City (GRDM5)

Salt Creek (IL) near Greenview (GREI2)

Beaver Creek (Central IA) near Grimes (GRMI4)

Salt Creek near Greenwood (GRNN1)

South Papillion Creek near Gretna (GSBN1)

Mississippi River below Lock and Dam 10 - Guttenberg (GTTI4)

Black River (WI) at Hwy 95 (HAAW3)

Black River (WI) at Hatfield Dam (HABW3)

Black River (WI) near Hatfield (HATW3)

Illinois River near Havana (HAVI2)

Richland Creek (East Central IA) near Haven (HAVI4)

Little Blue River near Hollenberg (HBGK1)

North Fork Big Nemaha River at Humboldt (HBLN1)

West Fork Des Moines River at Humboldt (HBTI4)

Hickman Branch at Wagon Train Lake (HCKN1)

East Fork Black River at East Fork Rd (HEFW3)

Minnesota River at Henderson (HENM5)

North Fork Salt River at Hagers Grove (HGZM7)

Hickman Branch at Stagecoach Lake (HKMN1)

Nishnabotna River above Hamburg (HMBI4)

Omaha Creek at Homer (HMRN1)

West Nishnabotna River near Hancock (HNKI4)

Mississippi River at Hannibal (HNNM7)

West Fork Ditch near Hornick (HOKI4)

Root River (MN) at Houston (HOUM5)

Rock River near Hardwick (HRDM5)

West Nishnabotna River at Harlan (HRNI4)

Walnut Creek (East Central IA) near Hartwick (HRTI4)

Skunk Creek near Hartford (HTFS2)

Black Hawk Creek (Northeast IA) at Hudson (HUDI4)

Big Sioux River above Hawarden (HWDI4)

West Nishnabotna River near Henderson (HWNI4)

South Branch Ralston Creek at Iowa City (IACI4)

Indian Creek at Council Bluffs (ICBI4)

Nodaway River at Clarinda (ICLI4)

Middle River (Central IA) near Indianola (IDNI4)

Wapsipinicon River at Independence (IDPI4)

Trempealeau River at Independence (IDPW3)

Mississippi River at Illinois City (ILNI2)

Old Mans Creek near Iowa City (IOCI4)

Little Cedar River near Ionia (IONI4)

Iowa River at Iowa City (IOWI4)

Rapid Creek (IA) near Iowa City (IRCI4)

Thomas Creek near Bennington (IRLN1)

Little Papillion Creek near Irvington (IRVN1)

Wahoo Creek at Ithaca (ITHN1)

West Nishnabotna River at Irwin (IWNI4)

Cedar River at Janesville (JANI4)

West Fork Des Moines River at Jackson (JCKM5)

Jordan Creek (Central IA) at West Des Moines (JDAI4)

Mud Lake Drainage Ditch 71 (North Central IA) at Jewell (JEWI4)

Creek 22-15 near Leon - County Road J (JLNW3)

Floyd River at James (JMEI4)

Rock River near Joslin (JOSI2)

Split Rock Creek below Jasper (JSPM5)

Minnesota River near Judson (JUDM5)

English River at Kalona (KALI4)

Upper Iowa River at Kendallville (KDVI4)

Big Papillion Creek near Kennard (KEBN1)

English Creek (South Central IA) near Knoxville (KECI4)

Des Moines River at Keosauqua (KEQI4)

West Fork Cedar River at IFC--Kesley Hickory Ave (KESI4)

Mississippi River at Keithsburg (KHBI2)

Illinois River at Kingston Mines (KNGI2)

Tenmile Creek (WI) near Nekoosa (KOOW3)

Olive Creek at Olive Creek Lake (KRAN1)

West Fork Cedar River near Kesley (KSYI4)

Mississippi River at La Crosse - Pool 8 (LACW3)

Big Bear Creek at Ladora (LADI4)

Kickapoo River at La Farge (LAFW3)

Cedar River near Lansing (LANM5)

Mill Creek (NW IA) near Larrabee (LARI4)

Antelope Creek at Lincoln (27th Street) (LATN1)

Baraboo River at La Valle (LAVW3)

Reservoirs at Long Branch Reservoir (LBRM7)

Salt Creek at Lincoln (27th Street) (LCNN1)

Little Cedar River near Orchard 5E (LCOI4)

Mississippi River below Lock and Dam 7 - La Crescent (LCRM5)

La Crosse River near La Crosse (LCRW3)

Logan Creek near Wakefield (LCWN1)

Middle Creek (Central IA) near Lacey (LCYI4)

Mississippi River at LeClaire (LECI4)

Little La Crosse River at Leon (LENW3)

Platte River near Leshara (LESN1)

La Crosse River at Fort McCoy (LFMW3)

Little Floyd River near Sanborn (LFSI4)

Boyer River at Logan (LGNI4)

Mississippi River at LaGrange (LGRM7)

Haines Branch at Lincoln (SW 56th Street) (LHBN1)

Little Salt Creek near Lincoln (Arbor Road) (LICN1)

North Raccoon River (IA) near Lanesboro (LKCI4)

Mississippi River at Lake City (LKCM5)

Zumbro River at Lake Zumbro (LKZM5)

Lyon Valley Creek near Melvina - Lamplighter North (LLNW3)

Halls Valley Creek near Melvina - Lamplighter South (LLSW3)

Baraboo River at Kendall Village (LLXW3)

Cottonwood River (MN) near Lamberton (LMBM5)

Mud Creek (NW IA) near Lester (LMCI4)

Middle Creek at Lincoln (SW 63rd Street) (LMCN1)

Floyd River at Le Mars (LMRI4)

Antelope Creek at Holmes Lake (LNCN1)

Spoon River (W-IL) at London Mills (LNMI2)

Little Sioux River at Linn Grove (LNNI4)

Mississippi River at Lansing - Pool 9 (LNSI4)

South Branch Root River at Lanesboro (LNSM5)

Iowa River near Lone Tree (Tri-County Bridge) (LNTI4)

Spring Creek at Lodi (LODW3)

Oak Creek at Lincoln (Air Park Road) (LOKN1)

Platte River at Louisville (LOUN1)

West Fork Little Sioux River near Lake Park (LPRI4)

Little Rock River near George (LRGI4)

Salt Creek at Lincoln (70th Street) (LSCN1)

Watonwan River near La Salle 3ESE (LSLM5)

Upper Iowa River near Lime Springs (LSPI4)

Salt Creek at Lincoln (Pioneers Boulevard) (LUSN1)

Rock River at Luverne (LUVM5)

Cottonwood River (MN) at Leavenworth (LVNM5)

Stevens Creek near Lincoln (LVNN1)

Mississippi River below Lock and Dam 9 - Lynxville (LYNW3)

West Nodaway River at Massena IA 148 (MAAI4)

Maple River at Mapleton (MAPI4)

Maquoketa River near Maquoketa (MAQI4)

Spring Creek (North Central IA) near Mason City US 65 (MASI4)

Ocheyedan River near May City (MAYI4)

North Fork Zumbro River at Mazeppa (MAZM5)

Black Earth Creek at Mazomanie (MAZW3)

Big Creek (IA) near Mt Pleasant (MBCI4)

Shell Rock River (Northeast IA) near Marble Rock (MBLI4)

Mosquito Creek near Council Bluffs (MCBI4)

Mississippi River at McGregor (MCGI4)

Maquoketa River at Manchester Hwy 20 (MCHI4)

South Skunk River near Ames McFarland Park (MCPI4)

Winnebago River (Northern IA) at Mason City (MCWI4)

South Fork Watonwan River near Madelia 3SW (MDAM5)

Medary Creek near Medary (MDYS2)

Sinsinawa River near Menominee (MENI2)

Indian Creek (Central IA) near Mingo (MGOI4)

Little Sioux River near Milford (MIFI4)

Maple River at Ida Grove (MIGI4)

Iowa River at Marshalltown (MIWI4)

Keg Creek near Mineola (MKCI4)

Missouri River near Maskell (MKLN1)

South Papillion Creek at Wehrspann Lake (MLDN1)

Rock River at Moline (MLII2)

Mill Creek (IL) at Milan (MLNI2)

Little Sioux River near Montgomery (MLSI4)

Little La Crosse River at Market Road (MLVW3)

Mosquito Creek near Neola (MNEI4)

Minnesota River at Mankato (MNKM5)

Cannon Valley Creek near Cashton - Manna Avenue (MNNW3)

Chariton River near Moulton (MOLI4)

Missouri River at Highway 92 at Omaha (MOMN1)

Shell Rock River (Northeast IA) at IFC--Marble Rock 290th St (MRBI4)

Maple River at Galva (MRGI4)

Floyd River at Merrill (MRLI4)

Illinois River at Meredosia (MROI2)

Iowa River at Marengo (MROI4)

Missouri River near Ponca (MRPN1)

Cannon River at Morristown (MRTM5)

Big Blue River at Marysville (MRYK1)

Mississippi River below Lock and Dam 5 - Minnesota City (MSCM5)

Redwood River at Marshall (MSHM5)

Missouri River near St. James (MSJN1)

Boyer River near Missouri Valley (MSVI4)

Missouri River at Highway 370 at Bellevue (MTLN1)

Minnesota River near Morton (MTNM5)

Pecatonica River at Martintown (MTNW3)

Timber Creek (Central IA) near Marshalltown (MTWI4)

Mud Creek at Henderson (MUDI4)

Mississippi River at Muscatine (MUSI4)

Wisconsin River at Muscoda (MUSW3)

East Fork Vermillion River above Montrose (MVRS2)

West Papillion Creek at Millard (MWBN1)

Willow Creek (North Central IA) at Mason City US 18 Bus (MWCI4)

102 River at Maryville (MYVM7)

Platte River at North Bend (NBDN1)

Mississippi River at New Boston (NBOI2)

Yellow River (WI) at Necedah (NCAW3)

North Deer Creek above Brookings (NDCS2)

Missouri River at Nebraska City (NEBN1)

English River at Parnell (NEPI4)

Beaver Creek (Northeast IA) at New Hartford (NHRI4)

Maple Creek near Nickerson (NKRN1)

Illinois River at LaGrange Lock and Dam (NLGI2)

Lemonweir River at New Lisbon (NLSW3)

Shell Rock River (Northeast IA) at Nora Springs (NORI4)

South Fork Iowa River near New Providence (NPVI4)

Cannon River at Northfield (NRFM5)

North River (Central IA) near Norwalk (NRWI4)

La Crosse River at Lake Neshonoc Dam (NSKW3)

Seven Mile Creek (MN) near St. Peter 6S (NSTM5)

Shell Rock River (Northeast IA) near Northwood (NTWI4)

Little Cedar River at Nashua (NUAI4)

Minnesota River at New Ulm (NULM5)

Chariton River near Novinger (NVZM7)

Edwards River near New Boston (NWBI2)

Moore Creek at Norwalk (NWKW3)

Cottonwood River (MN) at New Ulm (NWUM5)

Boxelder Creek at Lake Zorinsky (OAAN1)

Knight Creek at Glenn Cunningham Dam (OAHN1)

Brush Creek (WI) near Cashton - Opal Road (OBCW3)

Milford Creek near Milford (OBJI4)

South Branch Middle Fork Zumbro River at Oronoco (OCOM5)

Moore Creek near Wilton - County Road T (OCYW3)

Rullands Coulee Creek near Portland - Oakland Road (ODOW3)

Lake Odessa at Schafer Landing - Port Louisa National Wildlife Refuge (ODSI4)

Offutt Ditch (Bellevue Drain) near Offutt AFB (OFFN1)

Big Papillion Creek at Fort Street at Omaha (OHAN1)

Sangamon River near Oakford (OKFI2)

Cedar Creek (IA) near Oakland Mills (OKMI4)

Iowa River at Oakville (OKVI4)

Big Papillion Creek at Standing Bear Lake and Dam (OMAN1)

Big Papillion Creek at Pacific Street at Omaha (OMBN1)

Cole Creek at Blondo Street at Omaha (OMCN1)

Missouri River at Omaha (OMHN1)

Little Papillion Creek at Ak-sar-ben at Omaha (OMLN1)

North Branch Middle Fork Zumbro River near Oronoco 1W (ONOM5)

Kickapoo River at Ontario (ONTW3)

South Skunk River near Oskaloosa (OOAI4)

Henderson Creek near Oquawka (OQUI2)

Ocheyedan River near Everly (OREI4)

Edwards River near Orion (ORII2)

Cedar River near Osage (OSGI4)

Des Moines River at Ottumwa (OTMI4)

Cedar River near Otranto (OTRI4)

Turkey River near Osterdock (OTUI4)

Maple Creek (MN) at Owatonna (OWMM5)

Straight River at Owatonna (OWTM5)

South Branch Middle Fork Zumbro River near Oxbow Park (OXBM5)

Clear Creek (IA) near Oxford (OXFI4)

Willow Creek (NW IA) near Oyens (OYEI4)

North River (MO) at Palmyra (PALM7)

Split Rock Creek near Garretson (PALS2)

Middle Raccoon River (IA) at Panora (PANI4)

Grand River near Pattonsburg (PATM7)

Crystal Creek above Preston 6S (PCCM5)

Perry Creek near Hinton (PCHI4)

Pope Creek near Keithsburg (PCKI2)

Perry Creek near Millnerville (PCMI4)

Wisconsin River below Prairie Du Sac Dam (PDSW3)

Pebble Creek above Scribner (PEBN1)

Logan Creek at Pender (PEDN1)

Des Moines River at Red Rock Reservoir (PELI4)

Elkhorn Creek (IL) near Penrose (PENI2)

Sangamon River at Petersburg (PETI2)

Wisconsin River at Petenwell Dam (PETW3)

Papillion Creek at Harlan Lewis Road near La Platte (PHRN1)

Illinois River at Peoria (PIAI2)

Pigeon Creek (WI) near Pigeon Falls (PIGW3)

Pipestone Creek at Pipestone (PIPM5)

Yellow River (WI) at Pittsville (PITW3)

West Fork Vermillion River near Parker (PKRS2)

South Branch of Middle Creek at Twin Lakes Reservoir (PLDN1)

Elkhorn River at Pilger (PLGN1)

Fourmile Creek (Central IA) at IFC--Pleasant Hill Vandalia Rd (PLHI4)

Big Creek Lake (Central IA) near Polk City (PLKI4)

Cedar River at Palo (PLOI4)

Bluff Creek (Central IA) at Pilot Mound (PMDI4)

Pine Creek (MN) near Cannon Falls 2NW (PNEM5)

Lake Panorama (Central IA) at Panora (PNLI4)

Middle Fork Zumbro River at Pine Island (PNLM5)

Illinois River at Peoria Lock and Dam (PRAI2)

South Fork Chariton River near Promise City (PRMI4)

North Raccoon River (IA) near Perry (PROI4)

South Papillion Creek at Chalco (PSBN1)

Soldier River at Pisgah (PSGI4)

North Branch Pipestone Creek near Pipestone (PSNM5)

Pipestone Creek below Pipestone (PSTM5)

Missouri River at Plattsmouth (PTMN1)

South Branch Root River at Preston (PTNM5)

West Papillion Creek at Papillion (PWBN1)

Mississippi River at Quincy Lock and Dam 21 (QLDI2)

Chariton River at Rathbun Tail (RABI4)

Big Papillion Creek at Q Street at Omaha (RABN1)

Chariton River at Rathbun Reservoir (RADI4)

Chub Creek at Hwy 47 near Randolph 3W (RANM5)

Rock River at Rock Rapids (RAPI4)

Blue Earth River near Rapidan (RAPM5)

Oak Creek at Branched Oak Reservoir (RAYN1)

Bear Creek (MN) near Rochester (RBCM5)

Baraboo River at Reedsburg (RBGW3)

Cascade Creek at Rochester (RCCM5)

Rose Creek near Fairbury (RCEN1)

South Fork Zumbro River at Rochester (RCHM5)

Mississippi River at Rock Island (RCKI2)

North Branch Middle Fork Zumbro River at Roscoe - Cty Rd 27 (RCOM5)

Cascade Creek near Rochester 3W (RCRM5)

South Fork Sangamon River below Rochester - AUX (RCSI2)

South Fork Zumbro River at Rochester Beltline (RCSM5)

East Nishnabotna River at Red Oak (RDOI4)

West Nishnabotna River near Randolph (RDPI4)

Kickapoo River at Readstown (REAW3)

South Raccoon River (IA) at Redfield (REDI4)

La Moine River at Ripley (RIPI2)

Shell Rock River (Northeast IA) near IFC--Rockford Foothill Ave (RKFI4)

Rock River at Rock Valley (RKVI4)

Pilot Creek (Central IA) near Rolfe (RLFI4)

Brush Creek (WI) near Cashton - Nevada Road (RNOW3)

South Skunk River near IFC--Randall Hwy R61 (RNSI4)

South Fork Sangamon River near Rochester (ROCI2)

Silver Creek (MN) near Rochester (ROCM5)

Salt Creek at Roca (ROCN1)

Iowa River near Rowan (ROWI4)

Le Sueur River near Rapidan (RPDM5)

Root River (MN) near Pilot Mound (RPMM5)

Des Moines River at Red Rock Tail (RRDI4)

102 River at Rosendale (RSDM7)

Root River (MN) near Rushford 2W (RSFM5)

Baraboo River at Rock Springs (RSPW3)

Missouri River at Rulo (RULN1)

Redwood River at Russell (RUSM5)

Platte River (WI) at Rockville (RVLW3)

Sangamon River at Riverton (RVTI2)

Redwood River at Redwood Falls (RWDM5)

Salt Creek at Lincoln (Fairgrounds) (SALN1)

Des Moines River at Saylorville Reservoir (SAYI4)

Skunk Creek near Chester (SCCS2)

North Raccoon River (IA) near Sac City (SCRI4)

Le Sueur River at St. Clair (SCRM5)

Des Moines River at Saylorville Tail (SDTI4)

Spoon River (W-IL) at Seville (SEVI2)

Des Moines River at St. Francisville (SFLM7)

Big Sioux River at Sioux Falls I-90 (SFLS2)

Big Sioux River at Sioux Falls Maple Street (SFMS2)

South Fork Zumbro River near Rochester 5SW (SFZM5)

Floyd River at Sheldon (SHLI4)

East Nishnabotna River near Shenandoah (SHNI4)

Shell Rock River (Northeast IA) at Shell Rock (SHRI4)

Platte River near Schuyler (SHYN1)

Skunk Creek at Sioux Falls (SIFS2)

North Skunk River near Sigourney (SIGI4)

Silver Creek at Silver City (SILI4)

Perry Creek at Sioux City (SIOI4)

Missouri River at St. Joseph (SJSM7)

Snake Creek near Yorktown (SKYI4)

Spirit Lake near Orleans (SLKI4)

Sixmile Creek above Brookings (SMCS2)

Turkey Creek (KS) near Seneca (SNCK1)

Little Cannon River at Sogn (SOGM5)

Kickapoo River at Soldiers Grove (SOGW3)

La Crosse River at Sparta (SPAW3)

Spring Creek (IL) at Springfield (SPFI2)

Cottonwood River (MN) above Springfield (SPFM5)

Olive Branch at Bluestem Lake (SPGN1)

Little Sioux River near Spencer / Highway 18 (SPII4)

Turkey River at Spillville (SPLI4)

Ocheyedan River near Spencer (SPOI4)

Minnesota River at St Peter (SPTM5)

Turkey River near Spillville (SPVI4)

Little Sioux River at Spencer (SPWI4)

Pebble Creek at Scribner (SRBN1)

Sangamon River near Springfield (SRSI2)

Missouri River at Sioux City (SSCN1)

Iowa River at Steamboat Rock (STBI4)

Keigley Branch (Central IA) near Story City (STCI4)

Kickapoo River at Steuben (STEW3)

Maple River near Sterling Center 2NE (STGM5)

Wisconsin River below Stevens Point Dam (STPW3)

Des Moines River near Stratford (STRI4)

Floyd River near Struble (STUI4)

Sugar Creek (W-Central IL) near Springfield (SUGI2)

Waterman Creek near Sutherland (SWCI4)

Lincoln Creek near Seward (SWDN1)

Des Moines River near Swan (SWNI4)

Big Blue River at Seward (SWRN1)

Big Sioux River at Sioux City (SXCI4)

Big Sioux River at Sioux Falls N. Cliff Avenue (SXFS2)

Iowa River near Tama US 63 (TAMI4)

South Fabius River near Taylor (TAYM7)

Bachelor Creek (SD) near Trent (TBCS2)

Turkey River near Cresco (TCGI4)

Tri Creek near Norwalk - Dam Inlet (TCIW3)

Tri Creek near Norwalk - Dam Outlet (TCOW3)

Turkey River near Elgin 6SE (TENI4)

North Oak Creek near Touhy (THYN1)

Iowa River near Tama Hwy E49 (TMAI4)

Deer Creek (East Central IA) near Toledo (TOLI4)

Wapsipinicon River near Tripoli (TPLI4)

Brushy Fork Creek (Western IA) near Templeton (TPTI4)

Des Moines River near Tracy (TRCI4)

Turtle Creek near Austin (TRCM5)

Turkey Ridge Creek near Centerville (TRCS2)

Big Sioux River at Trent (TRES2)

Mississippi River below Lock and Dam 6 - Trempealeau (TREW3)

Tarkio River near Elliot (TRKI4)

Monona-Harrison Ditch near Turin (TRNI4)

Thompson River (IA/MO) near Trenton (TTZM7)

Little Sioux River near Turin (TURI4)

Upper Brush Creek near Cashton - Oneida Road (UBCW3)

North Walnut Creek (Central IA) at Urbandale 92nd Dr (UBNI4)

Walnut Creek (Central IA) at Urbandale 142nd St (UBWI4)

Logan Creek at Uehling (UEHN1)

Upper Iowa River near Decorah 3NW (UIDI4)

Mississippi River at Quincy (UINI2)

Weeping Water Creek at Union (UION1)

Maple Creek near North Bend (UKRN1)

North Walnut Creek (Central IA) at IFC--Urbandale Hickman Rd (URBI4)

Illinois River at Valley City (VALI2)

Platte River near Venice (VENN1)

Vermillion River at Vermillion (VERS2)

Volga River at Volga (VGAI4)

Cedar River at Vinton (VINI4)

Kickapoo River at Viola (VIOW3)

Volga River at Littleport (VLPI4)

North Oak Creek at Valparaiso (VLPN1)

Raccoon River (Central IA) at Van Meter (VNMI4)

Vermillion River near Chancellor (VRCS2)

East Fork Vermillion River near Parker (VRPS2)

Mississippi River at Wabasha - Pool 4 (WABM5)

Volga River at Wadena (WADI4)

Iowa River at Wapello (WAPI4)

West Nishnabotna River near Avoca (WAVI4)

Big Sioux River at Sioux Falls Western Avenue (WAVS2)

Boone River (North Central IA) near Webster City (WBCI4)

Blue Earth River near Winnebago 1W (WBOM5)

Walnut Creek (Central IA) near Waukee 156th St (WCBI4)

Willow Creek near Crooks (WCCS2)

Sleighton Creek near Wilton - County Road M (WCMW3)

Willow Creek near Soldier (WCSI4)

Little Walnut Creek (Central IA) near IFC--Clive 156th St (WCWI4)

Wisconsin River at Wisconsin Dells (WDEW3)

Raccoon River (Central IA) near West Des Moines (WDMI4)

West Fork Des Moines River above Windom (WDOM5)

Wisconsin River below Wisconsin Rapids Dam (WDSW3)

West Fork Ditch at Moville (WFMI4)

North Fork Zumbro River near Wanamingo (WGOM5)

South Omaha Creek at Walthill (WHLN1)

Mississippi River below Lock and Dam 5a - Winona (WIDM5)

Wisconsin River at Wisconsin Rapids (WIRW3)

West Nishnabotna River near Riverton (WISI4)

Vermillion River near Wakonda (WKAS2)

Kickapoo River near Wilton (WKLW3)

Turkey Creek near Wilber (WLBN1)

Elkhorn River near Winslow (WLON1)

Mississippi River at Winona - Pool 6 (WNAM5)

North Walnut Creek (Central IA) at IFC--Windsor Heights College Dr (WNDI4)

Wonder Creek near Spillville (WONI4)

Wahoo Creek at Wahoo (WOON1)

Mississippi River above Waupeton (Pool 11) (WPNI4)

Elkhorn River at West Point (WPNN1)

Poe Creek at County Road Z (WPZW3)

Winnebago River (Northern IA) near Rockford (WRFI4)

Wisconsin River below Castle Rock Dam near Mauston (WRMW3)

Mill Creek (WSHK1) at Washington (WSHK1)

South Branch Middle Fork Zumbro River at Wasioja (WSJM5)

Middle Fork Whitewater River near Whitewater State Park (WSPM5)

Wisconsin River below Whiting Dam (WTGW3)

Elkhorn River at Waterloo (WTRN1)

Cedar River at Waverly (WVLI4)

Beaver Creek (Central IA) near Woodward (WWDI4)

Middle Fork Whitewater River at Whitewater State Park Group Camp (WWPM5)

Indian Creek (IL) near Wyoming (WYGI2)

Fox River (IA/MO) at Wayland (WYLM7)

North Fork Zumbro River near Mazeppa 3ESE (ZPAM5)

Zumbro River at Zumbro Falls (ZUMM5)