2008-11-03_REVISION - M1999098 - Laserfiche WebLink

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Ms:.Joanna Williams RE: WW Farms Expansion SWSP Request April 22,. 2008 Page 9 of 5 • 10.5 acre-feeti of effluent from City of Thornton ? Approximately 2 acre-feet each month from November through March • 30 acre-feet from Centennial typically taken during October The only other demand on these .lease. sources is the depletions under the CoSSP for 2008. As presented in the CoSSP for 2008 for Aggregate there is more -than. enough excessive South Platte Replacement water to make the-winter replacements for.this additional site. The excess water.in 2008 is as follows: • Oct: 24.25 of • Nov: 44.75 of • Dec: 89:76 _af • Jan: 153.54 of • Feb: 119.05 of • Mar: 134.71 'af Currently Aggregate owns 11 shares of the Whitney Ditch that they have been using for augmentation. and will add the 2.5 shares to that augmentation structure that is located in the Northwest '/a of Section 33, Township 6 North, Range 66 West. Adequate accounting for the water commissioner and Division Engineer's Office will;be reported as it has been in the past. Applegate Group will keep the accounting records and will likely provide daily measurements for the Whitney shares and monthly summaries of site depletions. See Table 5 for the proposed accounting for this site. SITE DEWATERING The WW. Farms Expansion site will not be dewatered in 2008. We will monitor the dewatering rates when mining begins at this site and continuously record throughout the project. The original WW Farms site has been dewatered at a rate ranging from 300 up to 750 gpm per day. We expect similar rates at the expansion site. LONG-TERM AUGMENTATION The final reclamation'plans are not complete but in the event that open pits are left behind, Aggregate will' have a water court application filed for a plan for augmentation. to cover the .depletions three years prior to. completion of reclamation. Currently, the active WW Farms mining operation has a corporate surety bond in the amount of $115,480. This bond will have to be increased to cover the "expansion area" but it has not been obtained yet, as the, amendment has to be approved first. A portion of this . amount will be available in the unlikely event that the mining operator abandons the mining site. WELL PERMIT Aggregate will file for a new permit to cover the "expansion area" prior to mining. This well permit will include a 600-foot spacing evaluation for all of the surrounding wells. Currently, Permit No. 62555-F is issued for the original WW Farms site. River Resource Amendment to Permit M1999098 112C Page G15 of G37