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G ~ /, <br />~- J <br />EARTH ENGINEERING <br />CONSULTANTS, INC. <br />May 6. 1999 <br />Loveland Readv Mis.lnc. <br />P.O. Box 299 <br />Loveland, Colorado 80>39 <br />Attn: Mr. Steve Pancher <br />Re: Proposed Pond Lining <br />Loveland Ready-Mix Pond #1 <br />Loveland. Colorado <br />irEC Project No. 1994026 <br />)\4r. Pancher: <br />As requested, a senior engineer from Earth En,ineering Consultants_ Inc. (ECC) has <br />reviewed the information provided for the proposed linin~~ of Loveland Ready-Mia Pond <br />#1 in Loveland, Colorado. "fhe Loveland Ready-\1is Pond #I is located west of <br />Namaqua Road immediately north of the Bi; Thompson River and encompasses <br />approximateh 20 acres. This area was formerly used as an aggregate source and is now <br />proposed for use as a lined storage pond to provide augmentation water to the Big <br />Thompson River. <br />The mining excavation at Pond #I extended ki a depth of approximately 16 l0 20 feet <br />below surrounding ground surface. During the mining operation. the overburden s~~ils <br />were dozed off of the mineable aggregate and stockpiled on site The base o1 the <br />excavation extends to silty sandy claystone bedrock. With the adjacent flows in the Bi_ <br />'l~hompson River, it is anticipated the depth to ground~~nter is rclati~eh shallo~c in the <br />area when pumping for the minims operations ceases. <br />.4 cross section diagram of the proposed lining is attached. "fhe low permeability lad a of <br />the lining wilt be constructed of the stockpiled overburden soils placed in 8 feet ~cide <br />staggered lifts. The interior facing of the empondment will be composed of bedrock <br />CENTRE FOR AOVANGED TECHNOLOGY <br />2301 RESEARCH BOULEVARD, SUITE I O4 <br />FORT COLLINS, COLORADO BO526 <br />(970) 224-1522 (FA%) 224-4564 <br />