Laserfiche WebLink
r <br /> .• <br /> SOUTH PLATTE BASIN <br /> B asinwide Conditions Assessment: <br /> The SWSI value of 3.9 indicates that for June the SOUTH PLATTE RIVER BASIN <br /> basin water supplies were above normal. Reservoir storage, S Surface Water Supply Index History <br /> the major component in this basin in computing the SWSI 4 . <br /> value,was 108%of normal on June 30. Storage in the major i_ , ;a : , <br /> plains reservoirs, Julesburg, North Sterling, and Prewitt, 3 z <br /> decreased by 563 acre-feet during June and are at 98% of -�-- -a--- • _� <br /> capacity. Storage in the major upper basin reservoirs, 1 I <br /> '""""' '- ? <br /> Cheesman, Eleven Mile, Spinney, and Antero, increased by g D4 - '"i--;It- <br /> 22,746 acre-feet and are at 105%of capacity. The mean daily <br /> flow of the South Platte River at the Kersey gage was 12,991 . . <br /> cfs, as compared to the 1961-1993 June average of 2,853 cfs. - -2 <br /> Flow at the Colorado/Nebraska state line averaged 10,770 cfs. 3 <br /> The National Weather Service computes basin precipitation as -4 ................... ................................. ........................... ............... <br /> JAN66 JAN87 JAN86 JAN89 JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 <br /> 202% of normal during the month. WIRTH/YEAR <br /> The first part of June continued to be extremely wet, <br /> with significant precipitation occurring. The snow pack <br /> actually increase at most sites during the beginning of the <br /> month,and snow remained at several SNOTEL sites at the end <br /> of the month. The runoff was delayed, with peak flows SOUTH PLATTE RIVER NR. KERSEY <br /> reached approximately June 20. 2.6 <br /> FLOW BY WATER YEAR <br /> Flooding occurred adjacent to various rivers. 2.6 . <br /> Generally,flood damage was limited to agricultural land,ditch 2.4 <br /> g2.2 <br /> headgates, roads adjacent to rivers, and bridges. Some levees i' 2 <br /> along the South Platte breached, with the most significant <br /> breach occurred near Platville which took over a week to '6 <br /> t 14 <br /> repair. Hail and other severe weather created additional W, 1.2 _ <br /> property damage. S" 1 <br /> 1 0.8 <br /> u • <br /> Outlook 0.6 <br /> 0 4 <br /> Future calls for river water are not expected until the 0.2 4 . 1 <br /> later part of July, which is significantly latter than normal. 0 <br /> Oct. Nov Dec Jan Feb L4rcn Apr 1I May Jun. July Aug Sept <br /> The calls which will be placed should not be as senior as most 10NTH <br /> 0 WET(1983) 0 DRY 01964) A AVG A 1994 <br /> years. <br /> Administrative/Management Concerns <br /> There were no calls on the main stem below Spinney <br /> Mountain Reservoir the entire month of June. Even the REPRESENTATIVE RESERVOIRS <br /> Spinney Mountain call was removed on the 15th when the 260 SOUTH PLATTE RIVER BASIN <br /> reservoir filled for the first time in several years under its 240-/ <br /> direct priority. There were limited calls on tributaries during 220 <br /> the first part of the month, and no calls in the entire basin ; 200 ;,,,,,A,,,, <br /> 180 <br /> during the later part of the month. d 180_A <br /> Flow ratings on rivers are being checked since the <br /> ii' a°A N: <br /> high flows may have changed the stage/flow relationship due h g 120 <br /> to scouring effects. Fortunately,there were no significant dam BD A 7 <br /> safety problems during June due to the high flows and wet BD <br /> conditions. 40,� /��\� <br /> 200 " \\ " \\ /1 1 //\\ //\\ 7/I\\ <br /> Public Use Impacts <br /> Dr Ilon Hor..tooth Eleven Mt 1. Chessmen Jackson Barr Lake <br /> The cool wet weather have placed most crops three <br /> weeks behind average. There is concern that an early frost Avg.6130 Content. ES 6l30/95 canton. <br /> could ruin some crops. In some areas it has been impossible <br /> :o get into fields to cut and bale hay reducing the hay value <br /> significantly. <br /> 3 <br />