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<br />_.. <br />~. i~~=> <br />.. ~.: <br />observable surface water losses attributable to the Pot. Gunnison Cline <br />and as fol]ow up to a borehole to stop those losses, not readily <br />observable but definable by monitoring. In a situation where the <br />borehole and pump are in place and installation of the culvert stops <br />water inflow; pumping will cease. As conditions dictate, the casing <br />will be pulled from the hole and stored for reuse and the borehole <br />sealed using appropriate well sealing techniques. <br />It is anticipated that 500 feet of 36" corrugated metal pipe will be <br />adequate to mitigate any imaginable loss of surface water from the <br />streams to the mine. This supply of pipe will be maintained on the <br />site with the necessary collars and szals. <br />Overburden analyses and drilling experience across the lease block <br />indicate several strata of clay materials that swell upon wetting. As <br />a result, should a loss of surface water occur it is not expected that <br />total stream flow will be diverted. Should an inflow occur durino <br />spring runoff sufficient water will reach Pinnesota (Monument) <br />Reservoir to fist it, particularly in light of average water availabi- <br />• lity and Atlantic Richfield's rapid response to inflow events. <br />Because of this no use of Atlantic Richfield's water rights far <br />augmentation are expected during spring runoff. Another point of note <br />is that during normal spring runoff water passes both reservoirs, <br />Turner and Minnesota Ditch lieadgates and reaches the North Fork. <br />During any years of obviously low spring runoff Atlantic Richfield's <br />rapid response to inflow events and minimal augmentation using <br />available water rights will make all partizs whole. <br /> <br />During low flow/irrigation periods only minimal amounts of water are <br />available to Minnesota Creek from Dry Fork (above the reservoir) Horse <br />Creek and South Prong drainage. All or nearly all floes from Dry Fork <br />to the downstream ditches result from reservoir release. Should the <br />unlikely set of circwnstances•develop where significant amounts of <br />water are being delivered to Rtinnesota Creek (other than reservoir <br />releases) during the irrigation szason and they are diverted into the <br />mine, Atlantic Richfield's available water rights will be used to <br />(21) <br />