PROJ00401 - Laserfiche WebLink

Home Browse Search

' Th� contributing stream flows Lrom Coal Creek and Dome Creek were estimated as a percentage of th� known flows in the Yampa River at the gaging sta*ic3n. The percentages are based on a ratio: drainage areas and seasonal adjustments for geological and meterological conditions. The ratios whiclZ were used are as follows: FL06� RATIO MONTH (Coal Creek & Dome Creek/Yampa River) August- April ...................................... 0.35 May................................................... 0.50 June .............................................. .. 0.45 July .................................................. 0.315 During the period of study the stream flows are tabulated in APPENDIX B and the total of the combined Yampa River, Coal Creek and Dome Creek flow: at the reservoir site for ten repre-� sentative years (1957-1966) is shown graphically as "inflow" on Figare 3. The tight clayey type of soils comprising much of the foundation material and to be used in the embankment of the dam will reduce seepage losses from the Reservoir to a minimum. The greatest portion of the water which does seep through the em- bankment will be_picked up by the chimney drains and returned to the river channel. By this means the seepage water will be useable for a portion of the minimum fish and irrigation bypass requirements. The closest neteorolo�,ical stations for which complete evaporation data are available are Grand Lake 6SSW and Green Mountain Dam. Using the aeerage of these values and applying a pan factor the evaporation losses adjusted for an average monthly reservoir water level are eatimated as follows: Evaporation Losses From Reservoir (AC Ft.) Ir.dustrial Demand At Hayden (AC Ft.) Evaporation Losses of Industrial Water During Transmition (AC Ft.) June Ju1y 60 48 0 1000 August Sept 34 27 1500 1500 0 20 S1 44 IV - 17 1 ' i ' ;1 1 1 I 1 i i ' , � � �� 1 ' Tota1 j lf9 �' ' 4000 ' ' 115 ' I '