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<br />State of Colorado <br />Office of the State Engineer <br />File No. 20220-003 <br />30 December 1994 <br />Page 2 ~i~~ <br />C~;;` ,~ <br />• A gravel fdter sump with direct (untreated) dischazge of ground water [hilt m mine <br />pits as they aze advanced into the water table, as was done at Dall Flats in Lyo .,!~~ ratio, <br />will probably be acceptable in tertns of dischazge water quality. ~ <br />• The State Engineer would like to see Cooley collect pumping data during mining to help <br />evaluate hydrologic conditions that will occur during use of the proposed reservoirs. <br />• Wells and springs within 600 ft of the operation need to be considered before NPDES <br />dewatering. Springs, if not "permitted wells", may not be of concern. <br />• George Van Slyke will probably get involved for the State Engineer and should be consulted <br />with respect to geological information. <br />• The State Engineer will work closely with DMG relative to appropriate bonding requirements <br />and whether or not potential reservoir lining costs should be included given that a <br />performance bond with Morrison already addresses reservoir lining vests. <br />Bill McIntyre may be the official reviewer for the state Engineer. <br />A well permit with the State Engineer for the mine is required for dewatering. One may <br />already exist and may only need modification. <br />At the close of the meeting, the Cooley representatives felt that there were no "fatal flaws" to the <br />proposed amendment with respect to State Engineer Office concerns. Cooley agreed that certain State <br />Engineer requirements and conditions can and will be met prior to exposing ground water during <br />mining below the water table during next yeaz's mining season. <br />Thank you again for your input. We look forward to working with the State Engineer to help deliver <br />a desirable Front Range water storage facility as reclamation of ongoing Cooley operations at their <br />Morrison Quarry. Please call me if I can answer any questions or be of any assistance. <br />With best regazds, <br />HA~L~E~Y~& ALDRICH, INC. <br />Alan L. Howazd, P.G. <br />Senior Geologist <br />c: Mike Refer (CAMAS America) Tom Hatton (Hatton Water Consultants) <br />Cazl Mount (DMG) Bill York-Fein (DMG) <br />Judy Sappington (State Engineers Office) <br />f(°A <br />ID9133.7f10 <br />