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Mr. Eric Scott <br />May 21, 2013 <br />Page two of two <br />Currently, the exposed water surface at East Rigden is approximately 25 acres. As we <br />discussed during the inspection, the portion of the pit located south of the railroad tracks, east of <br />the Box Elder Ditch and north of East Horsetooth Road will ultimately be reclaimed as <br />developed water storage by the city of Fort Collins (see enclosed drawing). Once the City <br />completes construction of their water storage, 2 acres of the total 25 pre -1981 exposed water <br />surface acreage (identified as Pond # 4 on the enclosed Google Aerial) will be eliminated. <br />The area mined south of the railroad tracks has, for the most part, been cut off from the <br />surrounding sand and gravel aquifer. The area of the pit designated for future water storage has <br />been sealed along the east, south and part of the west perimeter. In addition, the sand and gravel <br />along the north side of the railroad tracks has been mined out thus removing the source of ground <br />water on the north side of the pit located south of the tracks thereby minimizing the area of <br />exposed water to a few acres. <br />In conclusion, it is my understanding that as long as the number of acres of exposed ground <br />water is equal to or less than the pre 1981 acres of exposed ground water there is no <br />augmentation liability and no need for a SWSP. That said I believe that the East Rigden Pit is in <br />compliance with the Division's requirements related to hydrologic balance. <br />Please don't hesitate to contact me if you have any questions regarding this letter and the <br />enclosed. <br />Sincerely, <br />J <br />l <br />Michael J. (Mike) Hart <br />Encl. <br />Copied electronically to: Bill McDowell, Cottonwood Farms LLC <br />Dallas (Whitey) Glasser <br />