DWR_2669027

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 1991
• Document Type - Publications and Reports: Streamflow Report

6

PLATTE RIVER BASIN

06706000 NORTH FORK SOUTH PLATTE RIVER BELOW GENEVA CREEK, AT GRANT, CO

LOCATlON.--Lat 39°27'26", long 105°39'29" in NW¼ sec.10, T.7 S., R.74 W., Park County, Hydrologic Unit 10190002, on left
bank at Grant, 1,550 ft downstream from Geneva Creek, and 1.3 mi downstream from east portal of Harold D. Roberts
tunnel.

DRAINAGE AREA.--127 mi2.

GAGE.--Water-stage recorder with satellite telemetry in a wooden shelter at a concrete control section. Datum of gage is
8,560.81 ft above National Geodetic Vertical Datum of 1929. Station is owned and maintained by the Denver Water
Dept. Satellite telemetry is maintained by the U.S. Army Corps of Engineers and the USGS.

REMARKS.--Hourly record from satellite data is complete and agrees with the chart. The record is reliable--except for
October 18, 20,21, and November 3,4, 1990--when gage height was affected by ice. Ice discharges can be estimated
well by comparison with flows when Roberts Tunnel water is keeping the gage ice-free. Record is good. Record is
developed by Robert E. Cooper.

RATING TABLE.--PLAGRACO10 USED FROM 01-OCT-1990 TO 30-SEP-1991

DISCHARGE, IN CFS, WATER YEAR OCTOBER 1990 TO SEPTEMBER 1991
MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 54 36 154 121 121 103 108 28 428 549 294 49
2 54 34 150 121 119 103 110 31 447 540 294 48
3 52 29 131 118 118 102 110 30 436 583 309 45
4 48 38 126 118 118 103 112 32 455 589 316 45
5 46 43 128 118 117 102 123 30 467 590 276 45
6 46 46 124 120 119 103 129 34 548 596 270 45
7 50 54 125 121 120 102 125 37 400 603 279 49
8 52 60 128 121 119 102 117 53 270 603 193 51
9 46 61 129 121 118 104 110 82 269 570 96 46
10 48 64 128 118 118 106 112 121 270 525 91 50
11 47 64 127 116 118 106 112 150 278 490 90 52
12 43 62 127 118 118 106 112 124 297 492 93 56
13 43 62 127 118 118 105 112 101 291 494 101 55
14 42 63 127 118 118 106 114 117 299 480 84 50
15 42 67 127 118 114 106 114 101 299 450 74 48
16 41 75 127 118 103 105 118 70 296 410 98 46
17 41 89 127 118 103 104 127 79 267 401 164 45
18 42 88 127 118 103 108 128 164 248 399 167 44
19 44 85 127 118 103 108 122 208 300 398 176 43
20 42 86 126 118 103 106 125 197 473 389 125 43
21 41 115 123 117 103 104 126 188 458 387 64 43
22 47 141 127 115 103 104 122 189 476 380 59 41
23 43 143 125 115 106 105 71 195 459 364 59 53
24 41 144 124 115 106 105 33 168 451 375 60 176
25 40 142 124 115 104 98 36 164 538 365 62 276
26 40 141 122 115 105 94 32 232 591 376 68 276
27 39 139 122 116 105 105 29 272 592 357 68 272
28 39 134 121 118 103 105 32 268 597 322 73 270
29 37 147 122 118 --- 104 26 295 603 291 64 271
30 37 156 121 117 --- 104 25 364 613 290 53 281
31 36 --- 121 119 --- 105 --- 355 --- 288 49 ---

TOTAL 1363 2608 3944 3655 3123 3223 2872 4479 12416 13946 4269 2914
MEAN 44.0 86.9 127 118 112 104 95.7 144 414 450 138 97.1
AC-FT 2700 5170 7820 7250 6190 6390 5700 8880 24630 27660 8470 5780
MAX 54 156 154 121 121 108 129 364 613 603 316 281
MIN 36 29 121 115 103 94 25 28 248 288 49 41

CAL YR 1990 TOTAL 49719 MEAN 136 MAX 672 MIN 10 AC-FT 98620
WTR YR 1991 TOTAL 58812 MEAN 161 MAX 613 MIN 25 AC-FT 116700

MAX DISCH 637 CFS AT 0100 30-JUN-1991 GH 1.89 FT. SHIFT 0.04 FT. MAX GH 1.89 FT. AT 0100
30-JUN-1991