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USGS
Water Resources of Colorado


PLATTE RIVER BASIN

06759500 SOUTH PLATTE RIVER AT FORT MORGAN, CO

LOCATION.--Lat 40°16'07"(revised), long 103°47'56", in SW 14 NE 14 sec.31, T.4 N., R.57 W., Morgan County, Hydrologic Unit 10190012, on right bank 0.1 mi downstream from bridge on State Highway 52, 0.3 mi north of Interstate Highway 76, and 0.7 mi north of Fort Morgan.

DRAINAGE AREA.--14,627 mi2 (revised).

PERIOD OF RECORD.--November 1943 to September 1958, December 2001 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06759500

REVISED RECORDS.--WSP 1730: Drainage area.

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 4,260 ft above NGVD of 1929, from topographic map. Prior to Dec. 7, 2001, at site 0.1 mi upstream at different datum.

REMARKS.--No estimated daily discharges. Records fair. Natural flow of stream affected by transmoutain and transbasin diversions, storage reservoirs, power developments, ground-water withdrawls, and return flow from irrigated areas. Several measurements of specific conductance and water temperature were obtained and are published in the "Supplemental Water-Quality Data for Gaging Stations" section of this report.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum flood known, 84,300 ft3/s, May 31, 1935, by slope-area determination of peak flow 1 mi upstream; flood came principally from Bijou Creek.

Discharge, cubic feet per second 
WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES
DAY
OCT
NOV
DEC
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
1

75

851

186

215

266

274

531

232

860

148

149

600

2

126

601

172

216

268

265

560

369

1,920

192

135

1,720

3

156

350

156

219

256

256

569

581

2,380

249

108

471

4

159

214

146

218

249

240

544

487

1,980

229

119

373

5

234

185

140

217

248

241

531

339

1,540

210

167

337

6

326

295

139

216

245

244

490

263

1,520

172

163

313

7

259

258

139

215

236

263

399

84

1,310

134

137

334

8

202

163

135

217

244

260

335

64

905

131

173

345

9

177

160

131

219

281

257

303

96

1,040

141

174

352

10

180

141

129

201

263

255

288

218

801

121

171

370

11

213

131

128

195

248

255

286

617

571

107

191

369

12

212

144

124

207

251

287

261

1,850

574

103

207

347

13

222

150

119

219

267

292

255

1,300

704

106

208

308

14

239

139

121

222

270

304

236

910

777

138

206

271

15

252

134

120

224

274

296

191

789

708

161

202

271

16

266

127

118

197

283

301

195

827

740

146

207

288

17

294

125

120

218

266

287

193

754

742

134

201

293

18

311

127

119

218

270

279

247

909

828

129

191

269

19

344

132

117

219

286

253

322

713

897

122

196

286

20

365

180

107

216

286

329

311

725

972

117

215

265

21

376

173

119

214

276

482

337

804

980

150

199

242

22

514

171

120

217

282

356

366

768

781

150

207

238

23

565

170

113

246

254

454

353

479

611

186

176

213

24

534

173

110

255

235

740

418

333

540

210

164

165

25

510

179

105

260

270

843

989

264

601

209

148

127

26

499

173

126

259

316

897

1,440

216

579

199

128

111

27

525

182

219

262

355

664

874

209

490

233

123

111

28

543

192

218

263

296

578

379

199

286

196

122

100

29

661

196

163

259

---

571

290

211

140

170

127

100

30

723

193

129

257

---

502

235

319

144

200

139

105

31

770

---

174

259

---

462

---

565

---

181

161

---

TOTAL

10,832

6,409

4,262

7,039

7,541

11,987

12,728

16,494

26,921

5,074

5,214

9,694

MEAN

349

214

137

227

269

387

424

532

897

164

168

323

MAX

770

851

219

263

355

897

1,440

1,850

2,380

249

215

1,720

MIN

75

125

105

195

235

240

191

64

140

103

108

100

AC-FT

21,490

12,710

8,450

13,960

14,960

23,780

25,250

32,720

53,400

10,060

10,340

19,230

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1944 - 2003, BY WATER YEAR (WY)
MEAN

226

233

275

339

320

370

369

968

1,302

329

292

212

MAX

527

521

770

686

829

1,319

969

5,082

7,615

1,351

874

362

(WY)

(1948)

(1946)

(1958)

(1946)

(1948)

(1948)

(1958)

(1958)

(1949)

(1947)

(1951)

(1957)

MIN

91.3

136

124

183

160

166

150

110

108

129

82.5

71.8

(WY)

(1951)

(1955)

(1951)

(1956)

(1956)

(1957)

(2002)

(1954)

(2002)

(1954)

(2002)

(2002)

SUMMARY STATISTICS
FOR 2002 CALENDAR YEAR
FOR 2003 WATER YEAR
WATER YEARS 1944 - 2003
ANNUAL TOTAL
72,641
124,195
ANNUAL MEAN
199
340
451
HIGHEST ANNUAL MEAN
956 1958
LOWEST ANNUAL MEAN
151 1954
HIGHEST DAILY MEAN
851 Nov 1
2,380 Jun 3
16,600 Jun 16, 1949
LOWEST DAILY MEAN
35 Jun 19
64 May 8
25 Oct 7, 1956
ANNUAL SEVEN-DAY MINIMUM
47 Jun 18
113 Dec 19
28 Oct 4, 1956
MAXIMUM PEAK FLOW
2,520 Jun 3
a33,800 Aug 3, 1951
MAXIMUM PEAK STAGE
12.47 Jun 3
b12.90 Aug 3, 1951
ANNUAL RUNOFF (AC-FT)
144,100
246,300
326,500
10 PERCENT EXCEEDS
452
731
740
50 PERCENT EXCEEDS
143
244
220
90 PERCENT EXCEEDS
58
127
118

a From rating curve extended above 15,000 ft3/s.
b Site and datum then in use.


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Water Resources of Colorado
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