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23 <br />PLATTE RIVER BASIN <br /> <br />06709610 SOUTH PLATTE RIVER BELOW CHATFIELD RESERVOIR, CO <br /> <br />LOCATION.--Lat 39°33'26", long 105°03'27", SE¼, sec. 1, T.6 S., R.69 W., Jefferson County, Hydrologic Unit <br />10190002. <br /> <br />DRAINAGE AREA AND PERIOD OF RECORD.--3,018 mi²; Jan. 1, 1985 to present. <br /> <br />GAGE.--A Stevens A-70 graphic water stage recorder and satellite monitoring DCP and shaft encoder installed in a <br />formed concrete well and shelter. The DCP is owned and maintained by the DWR. An electric drop tape <br />is used for referencing. There is no outside reference. <br /> <br />REMARKS.--The primary record is hourly satellite data with chart back up. Daily max and min values agreed with <br />the corrected chart values to within ±0.02 foot. The record is complete and reliable. High flow <br />measurements made this water year showed conflicting results with significant shift differences at <br />similar gage heights. The record is good, except flows above 800 cfs are fair due to inconsistencies in <br />high flow measurement results, and flows below 2 cfs are fair, due to lack of recent validation of the <br />rating. Station maintained by Jana Ash and record developed by Jana Ash and Bob Cooper. <br /> <br />RATING TABLE.--PLACHACO03 USED FROM 01-OCT-2006 TO 30-SEP--2007 <br /> <br /> DISCHARGE, IN CFS, WATER YEAR OCTOBER 2006 TO SEPTEMBER 2007 <br /> MEAN VALUES <br /> <br /> DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br /> <br /> 1 120 217 6.5 .42 1.3 62 945 2300 995 809 321 213 <br /> 2 87 95 6.5 .42 1.2 42 875 2480 1160 730 301 212 <br /> 3 36 26 6.5 .42 1.2 7.3 650 2470 1100 637 287 212 <br /> 4 20 27 4.2 .42 1.2 7.1 365 2340 930 524 214 252 <br /> 5 27 27 .51 .44 1.2 29 214 2250 651 565 269 293 <br /> 6 21 27 .51 .42 1.1 58 214 2230 513 601 464 264 <br /> 7 9.9 27 .51 .42 1.1 69 214 1970 712 599 616 291 <br /> 8 10 27 .49 .42 1.2 80 216 1650 932 504 617 320 <br /> 9 10 27 .42 .42 1.1 80 265 1440 871 426 617 320 <br /> 10 23 27 .42 .42 1.1 80 317 1480 729 426 552 268 <br /> 11 112 26 .44 .43 1.1 80 249 1610 638 426 363 159 <br /> 12 205 26 .43 .51 1.1 103 176 1600 635 377 214 73 <br /> 13 175 26 .43 .51 24 166 179 1600 892 333 281 50 <br /> 14 144 27 .42 .51 51 145 178 1500 978 333 270 63 <br /> 15 144 26 .40 .53 51 120 177 1380 1020 301 183 74 <br /> 16 196 26 .36 .51 57 155 114 1660 787 272 183 73 <br /> 17 266 27 .36 .95 50 155 49 1820 714 241 233 73 <br /> 18 193 27 .36 1.5 49 155 49 1750 793 212 294 174 <br /> 19 76 27 .36 1.5 49 213 151 1660 870 192 353 243 <br /> 20 44 26 .48 1.4 39 349 245 1660 1030 192 418 181 <br /> 21 49 26 .45 1.5 42 545 278 1600 1150 271 459 118 <br /> 22 49 26 .42 1.4 109 732 279 1530 1030 345 515 75 <br /> 23 72 26 .42 1.4 145 742 637 1870 1030 395 465 75 <br /> 24 97 26 .42 1.4 120 602 376 2030 1030 344 413 86 <br /> 25 97 27 .39 1.4 120 602 526 1900 1030 245 367 124 <br /> 26 152 27 .36 1.4 120 837 1100 1740 973 214 228 153 <br /> 27 295 27 .36 1.4 87 960 1090 1730 834 295 63 152 <br /> 28 380 18 .39 1.4 51 957 1240 1530 723 493 49 126 <br /> 29 378 6.5 .38 1.4 --- 955 1520 1120 671 726 125 102 <br /> 30 343 6.5 .36 1.4 --- 953 1890 911 776 661 350 101 <br /> 31 310 --- .38 1.3 --- 952 --- 821 --- 431 360 --- <br /> <br />TOTAL 4140.9 1007.0 34.93 27.97 1177.9 10992.4 14778 53632 26197 13120 10444 4920 <br />MEAN 134 33.6 1.13 .90 42.1 355 493 1730 873 423 337 164 <br />AC-FT 8210 2000 69 55 2340 21800 29310 106400 51960 26020 20720 9760 <br />MAX 380 217 6.5 1.5 145 960 1890 2480 1160 809 617 320 <br />MIN 9.9 6.5 .36 .42 1.1 7.1 49 821 513 192 49 50 <br /> <br />CAL YR 2006 TOTAL 34488.34 MEAN 94.5 MAX 941 MIN .03 AC-FT 68410 <br />WTR YR 2007 TOTAL 140472.1 MEAN 385 MAX 2480 MIN .36 AC-FT 278600 <br /> <br />MAX DISCH: 2510 CFS AT 19:30 ON May. 1, 2007 GH 5.37 FT. SHIFT 0.11 FT. <br />MAX GH: 5.37 FT. AT 19:30 ON May. 1, 2007 <br /> <br />FOR MORE COMPLETE OR DETAILED INFORMATION SEE DAILY OR MONTHLY RECORD. <br /> <br />