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Ms. Mariah McPherson and Mr. Peter Foster September 14, 2007 <br />Colona Gravel Pit, Substitute Water Supply Plan Page 4 <br />from the requirement to obtain a water court approved plan for augmentation to <br />replace depletions to the streams system in time, place and amount. <br />Notwithstanding this dedication, in the event that mining operations cease absent a <br />water court approved plan for augmentation, the pit must be backfilled to at (east <br />two feet above the highest recorded ground water table elevation at the pit. <br />13. in the event that the operator and/or landowner fails to obtain approval for renewal <br />of an SWSP or to obtain a water court decreed plan for augmentation sufficient to <br />replace depletions from the exposed ground water surface in the pit, diversions <br />attributable to 2.5 shares in the Ouray Ditch must be diverted in-priority at the ditch <br />then measured back to the Uncompahgre in the vicinity of the gravel pit, until the <br />pit is backfilled. Adequate measuring devices acceptable to the Water <br />Commissioner must be installed. <br />14. Applicant will inspect all parcels of dried up land used to generate augmentation <br />credits during the irrigation season to verify dry-up. The final verification of dry up <br />will be in the form of an affidavit signed by an individual having personal knowledge <br />of the dry up for this year's entire irrigation season for each parcel of land used in <br />this SWSP. All affidavits must be provided to the Division Engineer by November <br />15, 2007 in order that the final determination of augmentation credits for the <br />irrigation season can be made along with mapping showing any revisions to the dry <br />up acreage. Credit from any dry-up fields containing alfalfa or native grass will be <br />assessed in the following manner: <br />(a) For fields deep tilled or chemically treated to successfully kill alfalfa or native <br />grass, 100% credit will be given for consumptive use as otherwise computed <br />under the conditions of this approval. <br />(b) For fields not deep tilled or chemically treated to successfully kill alfalfa, records <br />of monthly monitoring of depth to groundwater at existing irrigation wells or <br />existing or new monitoring wells or piezometers within '/.-mile of each alfalfa or <br />native grass field must be maintained. Credits will be reduced according to the <br />following table when depth to groundwater is less than the depth assumed to <br />provide no significant contribution to alfalfa growth. Measurements taken at the <br />start of each month will determine the necessary reduction in credit to be applied <br />during the following month. The Applicant may use another methodology upon <br />review and approval by the State Engineer and Division Engineer. <br />Depth to Ground Percent Reduction in CU Credit' <br />Water (Feet) <br />Native Grass <br />Alfalfa <br />1 85% 100% <br />2 50% 90% <br />3 30% 75% <br />4 20% 50% <br />5 15% 35% <br />6 10% 20% <br />7 5% 15% <br />8 0% 10% <br />