Laserfiche WebLink
' UTE ENGINEERING & SURVEYING CO. <br />t P. 0. Box 674 443 Dodge <br />DELTA, COLORADO 81416 <br />(303) 874-7593 <br />Figure 2.05.3(4)(b)-2 <br />I ' <br />I <br />I <br />I <br />I <br />I <br />Bear Mine <br />Pond II - South of River <br />Pond sized to hold all runoff from 10 year- 24 hour storm. <br />Calculate: Runoff from 10 year - 24 hour storm = (1.8/10)"/:L2"/ft = <br />0.15'/24 hours <br />P = 1.8 bnom F.~gwce 2&, NUAA At.Pns Pnec~pttrcti.on - Frequency Alas ob the U1e~stenn <br />United S-t~,te~, Voeume III - CoYonado, page 37. <br />Soils: Undisturecl area Beenon - Absarokee 80* <br />Above mine site Absarokee - work 20° <br />flyr.ologic Soil Grcup C <br />Cover 95a Oak Brush <br />AP^.C - III CN = 35* <br />Area = 1,200,000 Ft2 <br />Disturbed Area Breece Lcam 100': <br />Eiydrologic Soil Gorup B <br />Cover 0~ <br />A19C - III CN = 70 ( ponding ) <br />Area = 289,000 ft2 <br />4 = (P-0.25)2 <br />P ~-0.85 <br />,,,,, Bear Coal Company 8580 <br />sHre,HO - 1- --- --. or.----6 - - <br />[ni ru, nii i, nv r•nR r,,.ir 3-4-30 <br />CHr r, erP Ov _ ^AiE _ ___. <br />* figure P.-3 USBR -Design of small <br />Dams pp 539. <br />4 = Direct Runoff (inches) <br />P = Storm Rainfall (inches) <br />S = Maximum potential difference between Q & n in inches. <br />CN 1,000 <br />10+5 <br />S _ 1,000 _ 10 <br />- CN <br />REVISED Pray 15, 1981 <br />CN = Curve number <br /> <br />