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USGS
Water Resources of Colorado


PLATTE RIVER BASIN

06721000 SOUTH PLATTE RIVER AT FORT LUPTON, CO

LOCATION.--Lat 40°06'58", long 104°49'05", in SW14SE14 sec.19, T.2 N., R.66 W., Weld County, Hydrologic Unit 10190003, on right bank 2 ft downstream from county road 18 bridge, 3.0 mi downstream from Big Dry Creek, and 2.5 mi north of Fort Lupton.

DRAINAGE AREA.--5,044 mi2 (revised). Area at 1957 gage location is 5,007 mi2 (revised).

PERIOD OF RECORD.--May to September 1906, April 1929 to September 1957, April to September 2003 (seasonal records only). Prior to October 1933 monthly discharge only, published in WSP 1310. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06721000

GAGE.--Water-stage recorder with satellite telemetry. Elevation of gage is 4,860 ft above NGVD of 1929, from topographic map. Oct. 3, 1947 to Sept. 30, 1957, water-stage recorder at site 3.9 mi upstream at different datum. See WSP 1730 for history of changes prior to Oct. 3, 1947.

REMARKS.--Records good except for estimated daily discharges, which are poor. Natural flow affected by transmountain diversions, storage reservoirs, ground-water withdrawals, diversions for irrigation, 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 FOR PERIOD OF RECORD.--Maximum discharge, 9,000 ft3/s, April 26, 1942, from rating curve extended above 6,700 ft3/s; maximum gage height, 7.57 ft, May 9, 1957, site and datum then in use; minimum daily, 4.4 ft3/s, October 29, 1956.

EXTREMES FOR CURRENT YEAR (seasonal only).--Maximum discharge during period April to September, 3,210 ft3/s, May 11, gage height, 7.52 ft; minimum daily, 101 ft3/s, Aug. 22.

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

---

---

---

---

---

---

---

681

1,610

530

229

638

2

---

---

---

---

---

---

---

545

1,750

518

242

398

3

---

---

---

---

---

---

---

465

1,590

584

191

449

4

---

---

---

---

---

---

---

416

1,420

460

183

300

5

---

---

---

---

---

---

---

330

1,360

312

267

226

6

---

---

---

---

---

---

---

237

1,290

348

267

213

7

---

---

---

---

---

---

---

197

1,570

405

162

212

8

---

---

---

---

---

---

---

191

1,120

405

166

260

9

---

---

---

---

---

---

---

209

853

242

474

212

10

---

---

---

---

---

---

---

1,520

812

182

199

186

11

---

---

---

---

---

---

---

2,000

859

262

158

164

12

---

---

---

---

---

---

---

1,220

906

266

341

184

13

---

---

---

---

---

---

---

884

887

242

328

175

14

---

---

---

---

---

---

---

705

855

235

265

173

15

---

---

---

---

---

---

---

524

836

225

263

178

16

---

---

---

---

---

---

---

561

866

246

198

174

17

---

---

---

---

---

---

---

429

846

247

147

164

18

---

---

---

---

---

---

---

517

1,560

222

147

172

19

---

---

---

---

---

---

---

634

1,290

753

306

174

20

---

---

---

---

---

---

---

560

1,080

361

187

181

21

---

---

---

---

---

---

---

464

1,000

288

127

178

22

---

---

---

---

---

---

---

365

e845

287

101

179

23

---

---

---

---

---

---

---

280

754

283

104

177

24

---

---

---

---

---

---

---

260

714

260

124

170

25

---

---

---

---

---

---

---

311

685

235

141

165

26

---

---

---

---

---

---

---

445

606

157

129

163

27

---

---

---

---

---

---

---

443

494

230

171

161

28

---

---

---

---

---

---

---

495

384

270

185

165

29

---

---

---

---

---

---

457

606

356

304

193

171

30

---

---

---

---

---

---

653

881

518

567

772

169

31

---

---

---

---

---

---

---

1,440

---

332

2,110

---

TOTAL

---

---

---

---

---

---

---

18,815

29,716

10,258

8,877

6,531

MEAN

---

---

---

---

---

---

---

607

991

331

286

218

MAX

---

---

---

---

---

---

---

2,000

1,750

753

2,110

638

MIN

---

---

---

---

---

---

---

191

356

157

101

161

AC-FT

---

---

---

---

---

---

---

37,320

58,940

20,350

17,610

12,950

e Estimated.


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U.S. Department of the Interior
U.S. Geological Survey
Water Resources of Colorado
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Last Modified: April 28, 2004