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PROJECT: Wildcat Mining Corporation <br />PRO. NO. 12 -0008 <br />ESIGN BY: GB GRAVES <br />REV. BY: D1 MADRUGA <br />AGENCY: La Plata County <br />DATE: 2/23/2012 <br />REV: <br />ORIFICE EQUATION SO -15 <br />10 -YR Release <br />Q= Co * Ao * ( 2 * g * Ho) o.s <br />Q= C *A *(2 *32.2 *(H ^(0.5) <br />C discharge coefficient (0.40 -.65) <br />A area of orifice (ft ^2) <br />H= Head above the notch (ft) <br />Q= flow in CFS <br />Pond A <br />C 0.61 <br />H 2.69 <br />A 0.3213 <br />Area 46.2736 in <br />width: 10" <br />length: 4.63" <br />ft <br />ft <br />g <br />Co= <br />Q= 2.58 <br />WSEL= 8628.99 <br />Invert= 8626.3 <br />32.2 ft/sec ^2 <br />0.61 <br />