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6/21/2018 LafargeHolcim-Production Mail-placer mining <br /> r : Joe Lovett<joe.lovett@lafargeholcim.com> <br /> placer mining <br /> Joe Lovett<joe.lovett@lafargeholcim.com> Thu, Jun 21, 2018 at 11:13 AM <br /> Draft To:john.vanoort@state.co.us <br /> John, <br /> Thank you for the information. I have briefly looked at the Division of Water Resources website and it does not appear <br /> that there is a standard form, but there are some guidelines for information to submit to the state engineer. I will review in <br /> more detail. <br /> I understand the need to augment for evaporation, but wanted to ask if there is a certain threshold before augmentation is <br /> required? <br /> also did not see any information on how to calculate for amounts evaporated. I would guess it would be a surface area <br /> times a rate that is specified in some of the rules or regulations. Could you point me toward this information? <br /> Thanks for the help. <br /> On Wed, Jun 20, 2018 at 1:10 PM, <john.vanoort@state.co.us>wrote: <br /> Mr.Lovett, <br /> Based on the operations you described,a Substitute Water Supply Plan(SWSP)is needed to replace the evaporation caused by the settling <br /> pond. This pond increase the surface water exposed to the atmosphere,which in turn increases the evaporation. <br /> Please feel free to contact me with any further questions. <br /> Thanks and have a great dayll <br /> John Van Oort <br /> Division 2 - River Operation Coordinator <br /> AqViCOLORADO <br /> P 719.542.3368 x2103 I C 719.250.8805 <br /> 310 E. Abriendo Ave. Suite "B" Pueblo Colorado, 81004 <br /> john.vanoort@state.co.us I www.water.state.co.us <br /> Cary"Joe" Lovett, PE <br /> Engineering Manager, Portland Plant <br /> LafargeHolcim <br /> 3500 State Highway 120 <br /> Florence, CO. 82116 <br /> Phone 719-288-1448 <br /> Cell 719-285-5518 <br /> joe.lovett@lafargeholcim.com <br /> noname <br /> 17K <br /> https://mail.google.com/mail/u/0/?ui=2&ik=3cf01277f9&jsver=kiyEr9UYE7U.en.&cbl=gmail_fe_180613.13_p5&view=pt&msg=16423564ffc956c2&dsqt=... 1/2 <br />