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USGS
Water Resources of Colorado


GREEN RIVER BASIN

09246200 ELKHEAD CREEK ABOVE LONG GULCH, NEAR HAYDEN, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.--July 1995 to September 2003 (discontinued). For a complete listing of historical data available for this site, see
http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09246200

PERIOD OF DAILY RECORD.--

SPECIFIC CONDUCTANCE: August 1995 to September 1999, April 2001 to September 2003 (discontinued).

WATER TEMPERATURE: September 1995 to September 1999, April 2001 to September 2003 (discontinued).

INSTRUMENTATION.--Water-quality monitor with satellite telemetry August 1995 to September 1999. April 2001 to September 2003.

REMARKS.--Daily specific-conductance records are good except for Oct. 1-22 and Apr. 9-18, which are fair, and Apr. 19-24 and July 14-18, which are poor. Daily water-temperature records are excellent except for Nov. 17 to Mar. 23, which are good.

EXTREMES FOR PERIOD OF DAILY RECORD.--

SPECIFIC CONDUCTANCE: Maximum, 1,120 microsiemens/cm, Mar. 19, 1999; minimum, 86 microsiemens/cm, May 21, 1999.

WATER TEMPERATURE: Maximum, 30.3°C, July 26, 2003; minimum, 0.0°C, on many days during winter months.

EXTREMES FOR CURRENT YEAR.--

SPECIFIC CONDUCTANCE: Maximum, 650 microsiemens/cm, Oct. 1; minimum, 99 microsiemens/cm, May 17.

WATER TEMPERATURE: Maximum, 30.3°C, July 26; minimum, 0.0°C, on many days.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Time
Instan-
taneous
dis-
charge,
cfs
(00061)
Turbid-
ity,
wat unf
lab,
Hach
2100AN
NTU
(99872)
Dis-
solved
oxygen,
mg/L
(00300)
pH,
water,
unfltrd
field,
std
units
(00400)
Specif.
conduc-
tance,
wat unf
uS/cm
25 degC
(00095)
Temper-
ature,
water,
deg C
(00010)
Hard-
ness,
water,
unfltrd
mg/L as
CaCO3
(00900)
Calcium
water,
fltrd,
mg/L
(00915)
Magnes-
ium,
water,
fltrd,
mg/L
(00925)
Potas-
sium,
water,
fltrd,
mg/L
(00935)
Sodium
adsorp-
tion
ratio
(00931)
Sodium,
water,
fltrd,
mg/L
(00930)
OCT
22...
1030
1.6
--
9.9
8.4
423
4.4
170
41.8
16.9
2.32
0.8
24.6
NOV
18...
1005
7.6
3.7
11.9
8.2
343
0.1
150
39.0
13.7
1.69
0.6
17.3
JAN
22...
1548
7.5
--
11.5
8.1
330
0.0
140
36.4
12.8
1.41
0.6
16.7
FEB
19...
1356
14
--
10.8
7.6
380
0.0
160
41.2
15.0
1.55
0.7
20.8
MAR
05...
1430
11
4.0
10.7
8.0
391
0.0
170
41.1
15.2
1.50
0.7
21.4
APR
08...
1215
33
32
11.1
8.3
589
5.2
220
50.8
22.5
2.12
1
37.5
23...
1048
422
310
11.4
8.1
188
1.0
72
17.8
6.72
1.38
0.4
8.07
JUL
18...
1130
3.8
6.5
7.5
8.5
424
24.8
160
37.7
16.7
2.45
0.8
24.6
29...
1035
1.1
--
7.3
8.5
396
23.9
160
35.3
17.0
2.67
0.9
27.3
SEP
11...
1330
7.5
15
8.3
8.5
393
13.3
150
33.9
16.3
2.64
0.9
24.1

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Alka-
linity,
wat flt
fxd end
lab,
mg/L as
CaCO3
(29801)
Chlor-
ide,
water,
fltrd,
mg/L
(00940)
Fluor-
ide,
water,
fltrd,
mg/L
(00950)
Silica,
water,
fltrd,
mg/L
(00955)
Sulfate
water,
fltrd,
mg/L
(00945)
Residue
water,
fltrd,
sum of
consti-
tuents
mg/L
(70301)
Residue
water,
fltrd,
tons/
acre-ft
(70303)
Residue
water,
fltrd,
tons/d
(70302)
Ammonia
+
org-N,
water,
unfltrd
mg/L
as N
(00625)
Ammonia
water,
fltrd,
mg/L
as N
(00608)
Nitrite
+
nitrate
water
fltrd,
mg/L
as N
(00631)
Nitrite
water,
fltrd,
mg/L
as N
(00613)
Ortho-
phos-
phate,
water,
fltrd,
mg/L
as P
(00671)
OCT
22...
E150
2.64
<0.2
10.6
76.1
--
--
--
0.28
<0.04
<0.06
<0.008
<0.02
NOV
18...
133
2.77
<0.2
13.6
54.2
222
0.30
4.55
0.14
<0.04
<0.06
<0.008
<0.02
JAN
22...
127
1.27
<0.17
15.2
48.9
209
0.28
4.26
0.16
<0.04
0.12
<0.008
<0.02
FEB
19...
E145
1.53
0.12
14.7
73.9
--
--
--
0.15
<0.04
0.14
<0.008
<0.02
MAR
05...
155
2.15
0.14
15.1
78.1
269
0.37
8.15
0.21
E.02
0.21
<0.008
<0.02
APR
08...
109
3.62
0.15
9.9
177
371
0.51
33.1
0.36
<0.04
0.59
E.004
<0.02
23...
46
1.44
0.10
8.5
34.7
113
0.15
129
1.2
<0.04
1.54
E.005
<0.02
JUL
18...
155
2.41
0.2
9.3
64.7
251
0.34
2.57
0.68
<0.04
<0.06
<0.008
<0.02
29...
139
4.28
0.2
5.0
59.0
234
0.32
0.70
0.63
<0.04
<0.06
<0.008
<0.02
SEP
11...
141
3.66
0.2
6.0
56.8
228
0.31
4.59
0.43
<0.04
<0.06
<0.008
<0.18

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Phos-
phorus,
water,
unfltrd
mg/L
(00665)
Organic
carbon,
water,
fltrd,
mg/L
(00681)
Organic
carbon,
water,
unfltrd
mg/L
(00680)
E coli,
m-TEC
MF,
water,
col/
100 mL
(31633)
Fecal
coli-
form,
M-FC
0.7u MF
col/
100 mL
(31625)
OCT
22...
0.014
--
--
--
--
NOV
18...
0.013
2.9
3.7
E2
E5
JAN
22...
0.005
--
--
--
--
FEB
19...
0.009
--
--
--
--
MAR
05...
0.009
2.7
3.8
E4
E5
APR
08...
0.048
--
--
--
--
23...
0.40
7.2
15.0
--
--
JUL
18...
0.033
--
--
E4
E6
29...
0.044
--
--
--
--
SEP
11...
0.034
5.5
6.5
E14
E16

< -- Actual value is known to be less than the value shown.
E -- Estimated laboratory analysis value.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Alum-
inum,
water,
unfltrd
recover
-able,
ug/L
(01105)
Arsenic
water,
fltrd,
ug/L
(01000)
Arsenic
water
unfltrd
ug/L
(01002)
Barium,
water,
fltrd,
ug/L
(01005)
Barium,
water,
unfltrd
recover
-able,
ug/L
(01007)
Beryll-
ium,
water,
unfltrd
recover
-able,
ug/L
(01012)
Cadmium
water,
fltrd,
ug/L
(01025)
Cadmium
water,
unfltrd
ug/L
(01027)
Chrom-
ium,
water,
fltrd,
ug/L
(01030)
Chrom-
ium,
water,
unfltrd
recover
-able,
ug/L
(01034)
Cobalt
water,
unfltrd
recover
-able,
ug/L
(01037)
Copper,
water,
fltrd,
ug/L
(01040)
Copper,
water,
unfltrd
recover
-able,
ug/L
(01042)
NOV
18...
50
<2
<2
51.1
47.7
<2
<0.2
<0.2
<0.8
<0.8
<3.4
1.2
1.3
JUL
18...
130
<2
E1
60.0
62.6
<0.5
<0.2
<0.2
<0.8
<0.8
<3.4
1.8
1.4

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Iron,
water,
fltrd,
ug/L
(01046)
Iron,
water,
unfltrd
recover
-able,
ug/L
(01045)
Lead,
water,
fltrd,
ug/L
(01049)
Lead,
water,
unfltrd
recover
-able,
ug/L
(01051)
Lithium
water
unfltrd
recover
-able,
ug/L
(01132)
Mangan-
ese,
water,
fltrd,
ug/L
(01056)
Mangan-
ese,
water,
unfltrd
recover
-able,
ug/L
(01055)
Mercury
water,
fltrd,
ug/L
(71890)
Mercury
water,
unfltrd
recover
-able,
ug/L
(71900)
Molyb-
denum,
water,
unfltrd
recover
-able,
ug/L
(01062)
Nickel,
water,
unfltrd
recover
-able,
ug/L
(01067)
Selen-
ium,
water,
fltrd,
ug/L
(01145)
Selen-
ium,
water,
unfltrd
ug/L
(01147)
NOV
18...
21
180
<1
<1
7
5.2
8.5
<0.02
<0.02
E1
E1.4
<3
<3
JUL
18...
20
200
<1
M
13
5.5
39.5
<0.02
<0.02
4
2.6
<3
<3

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Silver,
water,
fltrd,
ug/L
(01075)
Silver,
water,
unfltrd
recover
-able,
ug/L
(01077)
Zinc,
water,
fltrd,
ug/L
(01090)
Zinc,
water,
unfltrd
recover
-able,
ug/L
(01092)
NOV
18...
<0.3
<0.3
<24
<25
JUL
18...
<0.3
<0.3
<3
E3

< -- Actual value is known to be less than the value shown.
E -- Estimated laboratory analysis value.
M -- Presence of material verified but not quantified.

SUSPENDED SEDIMENT DISCHARGE, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Time
Instan-
taneous
dis-
charge,
cfs
(00061)
Temper-
ature,
water,
deg C
(00010)
Suspnd.
sedi-
ment,
sieve
diametr
percent
<.063mm
(70331)
Sus-
pended
sedi-
ment
concen-
tration
mg/L
(80154)
Sus-
pended
sedi-
ment
load,
tons/d
(80155)
MAR
05...
1430
11
0.0
--
6
0.18
APR
08...
1215
33
5.2
100
39
3.5
23...
1048
422
1.0
99
553
630
JUL
18...
1130
3.8
24.8
--
9
0.09
SEP
11...
1330
7.5
13.3
--
15
0.31

Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius 
WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAY
MAX
MIN
MEAN
MAX
MIN
MEAN
MAX
MIN
MEAN
MAX
MIN
MEAN
OCTOBER
NOVEMBER
DECEMBER
JANUARY
1

650

429

523

323

312

319

383

364

376

333

326

329

2

429

356

382

321

312

314

364

335

353

332

325

328

3

384

355

364

327

311

321

341

330

338

325

320

322

4

390

330

368

335

322

331

330

313

322

323

319

321

5

330

309

315

342

331

337

319

311

315

321

319

319

6

311

303

308

338

327

332

320

311

315

320

319

319

7

303

283

292

337

327

332

---

---

---

322

319

320

8

285

278

281

346

332

338

346

331

341

324

320

321

9

296

285

292

342

339

341

355

345

352

328

322

326

10

305

296

300

342

328

337

371

355

365

329

326

328

11

313

305

309

333

321

329

383

371

379

328

323

326

12

319

310

315

333

317

325

387

379

382

324

319

321

13

327

317

322

317

308

314

387

377

382

320

317

319

14

333

325

329

312

308

310

384

380

382

318

316

317

15

342

332

337

316

310

314

382

361

371

318

316

317

16

348

340

344

337

315

328

368

353

363

319

317

318

17

355

347

351

347

329

340

353

340

344

321

317

319

18

363

353

358

342

334

338

341

330

338

322

318

320

19

376

362

369

342

335

340

333

329

331

324

322

323

20

389

374

382

335

325

330

333

328

330

325

324

325

21

398

389

393

326

319

323

330

326

327

325

324

325

22

419

373

402

325

313

318

326

318

321

326

323

325

23

411

406

410

317

309

312

323

319

322

323

320

322

24

412

385

404

311

298

304

325

321

323

322

319

320

25

385

364

373

305

298

302

322

320

321

320

318

319

26

364

351

359

337

315

326

322

319

320

320

317

318

27

351

333

342

352

337

346

321

319

320

319

315

318

28

333

318

324

356

344

353

321

320

321

325

319

321

29

318

314

316

371

356

366

323

321

322

326

321

324

30

314

311

312

383

371

379

325

322

323

326

320

324

31

318

311

314

---

---

---

327

322

325

320

307

313

MONTH

650

278

348

383

298

330

---

---

---

333

307

322

FEBRUARY
MARCH
APRIL
MAY
1

322

315

318

372

370

372

---

---

---

231

178

201

2

324

320

322

371

366

369

---

---

---

232

209

223

3

367

321

339

371

365

369

---

---

---

216

174

195

4

403

367

386

375

371

374

---

---

---

180

157

168

5

390

375

385

376

372

374

---

---

---

245

162

199

6

381

373

376

372

368

370

---

---

---

235

215

227

7

381

370

376

371

369

370

---

---

---

228

198

206

8

375

363

369

374

369

371

---

---

---

238

207

221

9

375

365

370

379

373

376

641

555

614

294

222

258

10

375

372

374

384

378

381

628

398

456

275

248

255

11

375

366

371

395

383

388

435

261

308

298

247

279

12

367

364

365

400

377

389

400

258

308

274

226

248

13

365

360

362

---

---

---

293

160

212

226

169

184

14

368

360

363

---

---

---

258

198

216

171

138

152

15

380

367

375

---

---

---

206

180

192

145

118

131

16

376

360

370

---

---

---

238

206

226

141

104

126

17

361

353

358

---

---

---

244

224

233

130

99

119

18

372

360

367

---

---

---

250

236

241

125

107

115

19

367

361

364

---

---

---

---

---

---

126

102

114

20

372

364

370

---

---

---

---

---

---

131

110

120

21

377

370

374

---

---

---

256

225

235

137

117

126

22

379

377

379

---

---

---

229

214

222

137

113

126

23

381

375

378

---

---

---

225

183

192

138

116

127

24

378

374

377

---

---

---

310

195

233

137

114

124

25

374

372

373

---

---

---

319

252

297

132

119

126

26

377

373

375

---

---

---

263

191

228

138

122

130

27

375

374

374

---

---

---

220

177

202

141

128

134

28

374

372

373

---

---

---

203

174

193

149

131

138

29

---

---

---

---

---

---

183

161

172

151

141

146

30

---

---

---

---

---

---

184

151

166

154

141

148

31

---

---

---

---

---

---

---

---

---

157

144

151

MONTH

403

315

367

---

---

---

---

---

---

298

99

168

JUNE
JULY
AUGUST
SEPTEMBER
1

163

145

155

357

347

353

403

393

398

404

394

399

2

155

144

149

374

356

364

399

391

393

---

---

---

3

163

153

157

394

365

380

394

390

392

---

---

---

4

171

162

167

375

357

364

394

385

390

---

---

---

5

177

168

173

375

361

367

408

392

398

---

---

---

6

187

177

182

364

354

359

421

408

414

---

---

---

7

198

186

192

379

358

369

427

420

422

---

---

---

8

207

197

202

399

379

389

436

427

429

440

415

424

9

215

206

210

398

383

390

443

433

437

436

360

381

10

224

212

218

394

374

386

---

---

---

371

363

367

11

229

219

223

424

374

396

---

---

---

387

345

375

12

233

220

229

414

387

402

---

---

---

345

309

317

13

246

231

238

405

383

390

---

---

---

332

321

329

14

258

239

248

---

---

---

---

---

---

326

321

324

15

263

251

257

---

---

---

---

---

---

325

319

322

16

267

259

262

443

417

434

---

---

---

334

324

328

17

281

262

271

461

420

438

---

---

---

338

334

336

18

290

272

280

---

---

---

---

---

---

351

338

345

19

299

289

295

384

358

369

---

---

---

362

351

357

20

300

292

296

361

345

353

---

---

---

381

363

373

21

298

289

293

345

341

343

---

---

---

393

381

386

22

306

290

296

350

338

344

---

---

---

403

393

398

23

311

306

308

358

346

350

622

521

593

411

401

407

24

315

308

311

365

355

359

561

449

494

419

410

415

25

319

309

314

377

363

366

457

444

451

431

417

425

26

331

314

323

381

372

375

450

380

413

445

430

437

27

336

323

329

387

378

381

380

367

371

478

445

459

28

344

325

335

391

385

387

377

370

372

500

478

492

29

359

331

343

395

385

390

387

377

380

503

497

500

30

357

338

348

397

392

394

393

387

389

510

503

506

31

---

---

---

398

393

395

398

393

394

---

---

---

MONTH

359

144

253

---

---

---

---

---

---

---

---

---

Temperature, water, degrees Celsius 
WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAY
MAX
MIN
MEAN
MAX
MIN
MEAN
MAX
MIN
MEAN
MAX
MIN
MEAN
OCTOBER
NOVEMBER
DECEMBER
JANUARY
1

15.4

7.3

11.1

2.5

0.6

1.7

0.9

0.0

0.2

0.0

0.0

0.0

2

13.8

9.6

11.7

2.6

0.7

1.5

1.9

0.0

0.5

0.0

0.0

0.0

3

11.7

9.2

10.3

3.1

0.0

1.1

1.6

0.0

0.4

0.0

0.0

0.0

4

10.5

7.6

9.1

3.3

0.0

1.3

0.8

0.0

0.2

0.0

0.0

0.0

5

11.8

8.6

10.1

3.8

0.0

1.6

0.9

0.0

0.2

0.0

0.0

0.0

6

13.0

8.2

10.6

4.0

0.0

1.7

1.4

0.0

0.3

0.0

0.0

0.0

7

13.9

7.4

10.8

3.2

0.0

1.6

1.1

0.0

0.2

0.0

0.0

0.0

8

14.2

8.1

11.3

2.9

1.3

2.0

0.8

0.0

0.1

0.0

0.0

0.0

9

13.7

7.6

10.7

2.7

1.4

2.3

0.7

0.0

0.1

0.0

0.0

0.0

10

13.5

7.2

10.2

1.5

0.1

0.8

0.5

0.0

0.1

0.0

0.0

0.0

11

10.2

7.4

9.3

2.5

0.0

0.9

0.5

0.0

0.1

0.0

0.0

0.0

12

11.0

4.1

7.3

2.6

0.0

1.0

0.0

0.0

0.0

0.0

0.0

0.0

13

10.9

3.1

6.6

1.3

0.0

0.6

0.2

0.0

0.0

0.0

0.0

0.0

14

11.0

3.1

6.6

2.6

0.0

1.2

0.2

0.0

0.0

0.0

0.0

0.0

15

11.0

3.4

6.9

1.9

0.0

0.8

0.2

0.0

0.0

0.0

0.0

0.0

16

10.3

3.9

6.8

1.4

0.0

0.4

0.2

0.0

0.0

0.0

0.0

0.0

17

10.9

3.3

6.7

0.9

0.0

0.2

0.0

0.0

0.0

0.0

0.0

0.0

18

10.9

3.5

6.8

1.8

0.0

0.5

0.0

0.0

0.0

0.0

0.0

0.0

19

10.1

3.7

6.6

2.2

0.0

0.8

0.0

0.0

0.0

0.0

0.0

0.0

20

9.5

3.3

6.1

2.9

0.0

1.0

0.0

0.0

0.0

0.0

0.0

0.0

21

9.6

3.2

6.0

2.8

0.0

1.1

0.0

0.0

0.0

0.0

0.0

0.0

22

7.1

3.0

5.2

2.9

0.0

1.3

0.0

0.0

0.0

0.0

0.0

0.0

23

6.9

4.6

5.9

3.0

0.0

1.5

0.0

0.0

0.0

0.0

0.0

0.0

24

8.9

5.2

6.8

2.2

0.6

1.4

0.0

0.0

0.0

0.0

0.0

0.0

25

7.9

4.0

6.1

0.8

0.0

0.3

0.0

0.0

0.0

0.0

0.0

0.0

26

7.4

3.7

5.8

0.9

0.0

0.2

0.0

0.0

0.0

0.0

0.0

0.0

27

9.8

5.1

7.3

0.8

0.0

0.2

0.0

0.0

0.0

0.0

0.0

0.0

28

7.6

4.9

6.3

1.1

0.0

0.2

0.0

0.0

0.0

0.0

0.0

0.0

29

6.5

4.1

5.2

1.3

0.0

0.3

0.0

0.0

0.0

0.0

0.0

0.0

30

4.4

2.2

3.3

1.8

0.0

0.4

0.0

0.0

0.0

0.0

0.0

0.0

31

2.8

0.4

1.9

---

---

---

0.0

0.0

0.0

0.0

0.0

0.0

MONTH

15.4

0.4

7.6

4.0

0.0

1.0

1.9

0.0

0.1

0.0

0.0

0.0

FEBRUARY
MARCH
APRIL
MAY
1

0.0

0.0

0.0

0.0

0.0

0.0

10.2

3.8

7.1

6.2

3.5

4.7

2

0.0

0.0

0.0

0.0

0.0

0.0

6.7

2.4

4.8

8.3

3.4

5.7

3

0.0

0.0

0.0

0.0

0.0

0.0

5.8

2.6

3.6

8.5

5.6

7.1

4

0.0

0.0

0.0

0.0

0.0

0.0

6.0

0.3

3.3

7.2

3.8

5.4

5

0.0

0.0

0.0

0.0

0.0

0.0

5.8

2.2

4.1

6.9

3.0

4.9

6

0.0

0.0

0.0

0.0

0.0

0.0

6.1

2.4

4.2

9.9

3.7

6.6

7

0.0

0.0

0.0

0.0

0.0

0.0

5.6

1.9

3.8

8.3

5.4

6.2

8

0.0

0.0

0.0

0.0

0.0

0.0

11.1

1.6

6.0

6.0

4.4

5.3

9

0.0

0.0

0.0

0.0

0.0

0.0

13.2

4.6

8.7

6.4

3.4

4.8

10

0.0

0.0

0.0

0.0

0.0

0.0

11.7

5.2

8.9

6.9

4.5

5.6

11

0.0

0.0

0.0

0.0

0.0

0.0

10.6

3.9

7.3

9.5

3.4

6.4

12

0.0

0.0

0.0

0.0

0.0

0.0

9.5

2.7

5.6

12.3

5.1

8.8

13

0.0

0.0

0.0

0.0

0.0

0.0

9.0

1.5

5.3

11.5

7.5

9.6

14

0.0

0.0

0.0

0.0

0.0

0.0

8.3

0.9

5.0

12.4

5.5

8.9

15

0.0

0.0

0.0

0.0

0.0

0.0

7.1

1.4

2.9

11.4

6.1

8.2

16

0.0

0.0

0.0

0.0

0.0

0.0

7.5

0.7

3.8

11.0

5.0

7.9

17

0.0

0.0

0.0

0.0

0.0

0.0

7.0

2.8

5.2

10.1

5.6

8.2

18

0.0

0.0

0.0

0.0

0.0

0.0

6.3

3.1

4.2

9.1

5.9

7.4

19

0.0

0.0

0.0

0.0

0.0

0.0

10.4

1.8

4.8

10.0

4.4

7.3

20

0.0

0.0

0.0

0.1

0.0

0.0

16.0

3.0

7.4

11.0

4.9

8.1

21

0.0

0.0

0.0

1.1

0.0

0.2

8.0

3.7

6.1

12.0

5.8

9.0

22

0.0

0.0

0.0

1.5

0.0

0.3

7.8

4.6

6.3

13.2

6.8

10.1

23

0.0

0.0

0.0

2.8

0.0

1.1

6.8

0.0

1.9

14.2

7.4

10.9

24

0.0

0.0

0.0

4.0

0.1

1.9

7.2

0.0

2.9

14.5

8.3

11.6

25

0.0

0.0

0.0

7.5

0.1

3.9

8.5

1.7

5.0

13.8

8.8

11.6

26

0.0

0.0

0.0

5.4

2.5

4.0

10.9

2.4

6.1

14.7

8.3

11.7

27

0.0

0.0

0.0

5.0

0.3

2.3

8.5

2.6

5.9

16.0

10.4

13.4

28

0.0

0.0

0.0

5.5

0.0

2.4

8.4

3.6

6.4

16.7

10.9

13.9

29

---

---

---

---

0.0

---

8.0

3.5

6.0

15.8

11.8

14.1

30

---

---

---

8.7

0.6

4.5

6.9

3.1

4.7

16.2

12.0

14.2

31

---

---

---

---

3.1

---

---

---

---

16.9

12.6

14.9

MONTH

0.0

0.0

0.0

---

0.0

---

16.0

0.0

5.2

16.9

3.0

8.8

JUNE
JULY
AUGUST
SEPTEMBER
1

15.7

12.5

14.2

25.5

17.4

21.6

26.9

17.6

22.1

24.6

13.3

18.9

2

15.8

11.2

13.5

27.1

15.5

21.3

29.0

17.9

22.9

24.4

14.4

19.0

3

16.4

10.5

13.5

27.4

16.5

22.0

25.7

19.1

22.3

25.0

14.1

19.0

4

17.1

10.8

14.1

27.8

17.0

22.3

26.3

18.2

22.2

25.3

14.6

19.5

5

16.4

10.9

13.7

27.0

16.5

21.8

28.9

17.4

22.9

21.6

13.9

18.1

6

16.1

10.6

13.4

25.7

16.2

21.1

27.4

17.9

22.8

24.2

16.2

19.0

7

17.0

10.1

13.6

27.6

17.2

22.0

25.4

18.3

21.9

21.6

15.9

17.7

8

18.6

10.5

14.6

25.9

16.8

21.3

28.7

17.9

23.0

20.9

13.8

17.2

9

17.4

12.9

15.3

26.7

14.9

20.9

29.7

18.5

23.6

19.9

13.8

16.8

10

19.5

13.3

16.4

27.5

15.9

21.8

28.7

16.9

22.8

16.8

12.9

14.6

11

19.1

14.1

16.5

25.0

16.4

21.2

27.1

18.2

21.5

15.0

11.4

13.0

12

19.3

12.9

16.0

26.9

16.4

21.8

28.5

17.2

21.7

18.2

11.4

14.6

13

20.4

13.4

16.8

25.8

17.1

21.9

28.6

17.7

22.2

18.1

11.8

14.9

14

22.8

14.5

18.6

---

17.3

---

---

---

---

16.9

9.5

13.4

15

24.4

15.4

19.9

25.6

18.5

22.2

---

---

---

17.7

9.6

13.7

16

24.6

17.8

20.6

28.8

18.6

23.5

---

---

---

17.9

12.3

14.9

17

23.6

15.7

19.6

30.0

20.1

24.7

---

---

---

14.9

10.4

13.2

18

25.2

16.6

20.7

30.0

---

---

---

---

---

17.0

8.4

12.1

19

23.2

17.0

20.1

29.9

20.9

24.9

---

---

---

16.9

7.7

12.1

20

20.5

15.9

17.9

29.3

20.1

24.5

---

---

---

16.6

8.5

12.1

21

20.0

14.0

17.3

29.5

20.2

24.9

---

---

---

17.0

7.5

12.2

22

22.5

15.2

18.7

28.8

20.7

24.8

---

---

---

18.3

7.9

13.0

23

23.4

14.9

19.0

27.4

19.6

23.4

27.6

19.2

22.8

18.0

8.6

13.2

24

20.2

15.9

17.8

29.2

19.5

23.6

27.1

18.8

22.8

18.6

8.6

13.5

25

19.2

14.2

16.6

29.1

20.0

24.4

25.2

19.7

22.0

17.7

8.3

13.1

26

23.0

12.7

17.8

30.3

20.8

25.0

25.4

17.6

21.2

17.9

8.9

13.4

27

24.3

14.4

19.4

27.7

20.2

23.9

23.2

18.5

20.9

18.5

9.6

13.8

28

25.6

15.6

20.6

27.7

19.3

23.6

26.0

16.7

21.1

18.5

9.6

13.9

29

26.6

16.9

21.7

29.1

20.2

23.7

25.3

15.7

20.3

18.7

9.7

14.2

30

26.6

16.9

21.9

28.6

18.7

23.4

24.7

16.7

19.9

18.8

11.0

14.6

31

---

---

---

24.5

17.7

21.3

22.6

16.2

19.1

---

---

---

MONTH

26.6

10.1

17.3

---

---

---

---

---

---

25.3

7.5

15.0


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U.S. Geological Survey
Water Resources of Colorado
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