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infiltration pond will be limited to 0.74 acres. Therefore, the total surface area of water exposed will be <br />limited to 1.37 acres. <br />If stormwater runoff is intercepted by this operation and is not diverted or captured in priority, it must be <br />released to the stream system within 72 hours. Otherwise, the operator will be required to make <br />replacements for evaporation. In addition to the settling pond and infiltration pond, the applicant will <br />install a mine sediment pond to intercept runoff and provide 24 hour detention time. <br />At least half of the water consumptively used at the site will be provided by an existing surface water right <br />of 2.0 cfs from Sacramento Creek. The remaining consumptive use will come from ground water and is <br />proposed to be augmented pursuant to a substitute water supply plan which is currently pending <br />evaluation by this office. <br />The site is proposed to be reclaimed to its pre- mining land use of rangeland. The ponds are proposed to <br />be backfilled as part of the reclamation plan. <br />The applicant must obtain a valid gravel pit well permit prior to the exposure of any ground water and <br />must obtain and operate in accordance with an approved substitute water supply plan. The applicant <br />submitted a Gravel Pit Well Permit Application and request for a Substitute Water Supply Plan to this <br />office on March 20, 2013. We cannot recommend approval of this request to increase the mining permit <br />to allow expanded use of ground water until we have reviewed and approved the substitute water supply <br />plan to ensure senior water right holders are not injured by this expansion. The applicant may contact the <br />State Engineer's Office with any questions. <br />