DWR_2668849

• Title: STREAM FLOW DATA FOR COLORADO
• Year: 2005
• Document Type - Publications and Reports: Streamflow Report

23
PLATTE RIVER BASIN

06709610 SOUTH PLATTE RIVER BELOW CHATFIELD RESERVOIR, CO

LOCATION.--Lat 39°33'26", long 105°03'27", SE¼, sec. 1, T.6 S., R.69 W., Jefferson County, Hydrologic Unit
10190002.

DRAINAGE AREA.--3,018 mi².

GAGE.--A Stevens A-70 graphic water stage recorder and satellite monitoring DCP and shaft encoder installed in a
formed concrete well and shelter. The DCP is located about 2000 ft away on the outlet structure in the
lake, and is also used for lake elevation. An electric drop tape is used for referencing. There is no
outside reference. The gage and DCP are owned by the USACOE and the DCP is maintained by the USGS.

REMARKS.--The primary record is hourly satellite data with chart back up. Daily max and min values agreed with
the corrected chart values to within +-0.02 foot. Four (+.01, -.01, -.01 & +.17) corrections to the
encoder data were applied for short periods. The record is complete and reliable. The record is good.
Station maintained and record developed by Jana Ash.

RATING TABLE.--PLACHACO03 USED FROM 01-OCT-2004 TO 30-SEP-2005

DISCHARGE, IN CFS, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005
MEAN VALUES

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

1 17 8.9 .36 .19 .25 .13 54 699 895 152 17 23
2 17 8.9 .36 .19 6.6 .13 42 473 563 79 44 25
3 17 8.9 .32 .19 12 .13 42 407 375 87 41 38
4 16 8.9 .3 .19 12 .13 54 678 406 27 77 50
5 15 17 .3 .2 12 .13 122 732 339 .52 320 49
6 15 26 8.8 .19 12 .12 258 543 248 11 365 48
7 15 26 21 .2 12 .13 257 406 223 58 101 32
8 15 68 21 .2 12 .16 173 407 189 119 40 31
9 16 131 21 .19 12 .13 187 536 154 150 91 59
10 17 87 21 .19 12 .13 185 592 250 109 68 72
11 17 50 21 .19 12 .13 86 568 492 42 48 72
12 51 50 21 .21 12 .13 .49 755 613 17 106 72
13 76 50 21 .19 12 .21 .27 738 561 40 223 59
14 76 50 21 .22 6.3 .19 .17 605 347 55 280 36
15 47 96 21 .25 .25 .15 .13 588 141 32 214 19
16 26 97 21 .25 .25 .13 .12 468 59 23 137 14
17 26 52 21 .25 .2 .13 .1 363 82 35 23 11
18 26 49 21 .25 .21 .12 88 367 147 70 32 11
19 27 32 21 .25 .18 .12 214 368 184 99 104 9.2
20 30 32 11 .25 .12 .12 238 390 240 75 150 6
21 28 32 .13 .25 .13 9 381 367 294 46 123 7.1
22 28 32 .19 .25 .13 22 367 330 280 39 123 16
23 27 16 .19 .26 .13 60 255 491 266 31 187 18
24 27 .42 .19 .25 .13 98 252 723 266 31 227 10
25 16 .42 .19 .25 .13 51 410 522 322 90 187 10
26 .27 .41 .19 .23 .13 .3 581 138 398 237 154 10
27 .05 .39 .19 .19 .13 .27 555 200 349 264 153 10
28 .03 .39 .19 .21 .13 .25 402 443 269 163 152 15
29 3.7 .38 .21 .2 --- 10 582 391 210 88 124 38
30 8.5 .36 .19 .25 --- 35 793 536 206 48 84 55
31 8.7 --- .19 .28 --- 55 --- 869 --- 9.7 47 ---

TOTAL 709.25 1031.37 296.49 6.86 147.4 343.57 6579.28 15693 9368 2327.22 4042 925.3
MEAN 22.9 34.4 9.56 .22 5.26 11.1 219 506 312 75.1 130 30.8
AC-FT 1410 2050 588 14 292 681 13050 31130 18580 4620 8020 1840
MAX 76 131 21 .28 12 98 793 869 895 264 365 72
MIN .03 .36 .13 .19 .12 .12 .1 138 59 .52 17 6

WTR YR 2005 TOTAL 41469.74 MEAN 114 MAX 895 MIN .03 AC-FT 82260

MAX DISCH: 959 CFS AT 05:00 ON Jun. 1, 2005 GH 3.87 FT. SHIFT 0.07 FT.
MAX GH: 3.87 FT. AT 05:00 ON Jun. 1, 2005

FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD.