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• TRAPPER 1~ININC INC. <br />iii iiiiiiiniiiiii <br />January 19, 1988 <br /> <br />Mr. Gregg Squire <br />Colorado Hined Land Reclamation Division <br />k23 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 90203-2273 <br />Dear Creqq: <br />The enclosed material addressee [he concerns of Mr. Jim Stevens for potential <br />spoil spYinga, and Ms. Candy Thompson for Clle J-2 and J-3 drainage channels. <br />Mr. Stevens is correct in stating that the referenced rule does require our <br />monitoring progYam £or surface end ground water to have Division approval. <br />Trapper does not contesc this point. However, 4.05.13 does not necessarily <br />require inventories and sampling of spoil springs or seeps if other methods are <br />available and/or in place to provide the Division Che necessary data [n <br />determine impacts. <br />In addition, Mr. Stevens is correct in the statement that if significant spoil <br />springs develop, they could be a convenient and inexpensive way to sample <br />ground water quality. Trapper does not conies[ this point; however, when a <br />well already exists in spoils, it would be a needless and costly duplication to <br />sample both. <br />Trapper Mine suggests instead that we not sample spoil springs if there rA a <br />spoils ground water monitoring well within a regraded surface water drainage <br />basin. Also, if a spoil spring is being sampled and a spoil ground water <br />monitoring well is installed, then the spoil spring would be dropped from the <br />monitoring network. <br />If there is more than one significant spoil spring within a basin, and tto spoil <br />monitoring wells, only one spring. would be monitored. The spring of choice <br />would be approved by the Division. <br />Significance should be based on [he ability of a spoil spring to yield a <br />representative and collectable water sample. Therefore, if a spoil spring <br />yields a measurable minimum flow - at least one gpm - then it will be <br />considered significant for sampling purposes only. This does not mean, <br />however, that the spoil spring would be significant in to rnis of surface water <br />impacts. For example, [he receiving water flow may be sufficiently high so <br />[list [he potential impacts are mitigated through dilution. Alternatively, the <br />spoil spring flow may not reach the main channel, either evaporating or <br />infiltrating back into the ground. <br />P.O. Box 187 Craig, Colorado 81626 (303)824-4401 <br />ee•d CO 91=a~~ 31JIW ~l3dddJ1 ©b a'1 98i80i~© <br />