2012-08-01_HYDROLOGY - M1980149 - Laserfiche WebLink

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Ms. Michelle L. Hatcher Hokestra SWSP July 30, 2012 Page 6 of 7 the existing farm diversion point on the ditch used to divert water to the historically irrigated lands has been installed or is diligently being pursued. 10. The name, address and phone number of the contact person who will be responsible for the operation and accounting of this plan must be provided with the accounting form to the division engineer and water commissioner. 9. Adequate accounting of depletions and replacements must be provided to the division engineer in Greeley (Div1Accountinq(c�state.co.us) and the water commissioner (Shera Sumerford at Shera.Sumerfordstate.co.us) on a monthly basis. Submitted accounting shall conform to the Administration Protocol "Augmentation Plan Accounting, Division One — South Platte Basin" (attached) 11. All diversions shall be measured in a manner acceptable to the division engineer. The Applicant shall install and maintain such measuring devices as required by the division engineer for operation of this SWSP. 12. All releases of replacement water must be sufficient to cover all out of priority depletions and be made under the direction and /or approval of the water commissioner. The replacement may be aggregated to maximize beneficial use. The water commissioner and /or division engineer shall determine the rate and timing of an aggregated release. 13. The approval of this substitute water supply plan does not relieve the Applicant and /or landowner of the requirement to obtain a Water Court decree approving a permanent plan for augmentation or mitigation to ensure the permanent replacement of all depletions, including long -term evaporation losses and lagged depletions after gravel mining operations have ceased. If reclamation of the mine site will produce a permanent water surface exposing groundwater to evaporation, an application for a plan for augmentation must be filed with the Division 1 Water Court at least three (3) years prior to the completion of mining to include, but not be limited to, long -term evaporation losses and lagged depletions. If a lined pond results after reclamation, replacement of lagged depletions shall continue until there is no longer an effect on stream flow. 14. In accordance with the letter dated April 30, 2010 from the Colorado Division of Reclamation, Mining, and Safety ( "DRMS "), all sand and gravel mining operators must comply with the requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the protection of water resources. The April 30, 2010 letter from DRMS requires that you provide information to DRMS to demonstrate you can replace long term injurious stream depletions that result from mining related exposure of ground water. Pursuant to approach number 3, the County is completing a slurry wall to eliminate the long term evaporation from the site. No bond has been posted for this work because a financial warranty is not required for a county. 15. Dewatering at this site will produce delayed depletions to the stream system. As long as the pit is continuously dewatered, the water returned to the stream system should be adequate to offset the depletions, thus dewatering is required to continue during the term of this plan. Once dewatering at the site ceases, the delayed depletions must be addressed, including depletions resulting from the gradual refilling of the pit. At least three years prior to completion of dewatering at the Hokestra Pit, a plan must be submitted that specifies how the post pumping dewatering depletions will be replaced, in time, place and amount. This SWSP will not be renewed until a totalizing flow meter, sufficient to accurately record monthly dewatering volumes, is installed on all dewatering discharges.