2008-04-16_HYDROLOGY - M1980226 - Laserfiche WebLink

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~' Mark McLean, P.E. April 16, 2008 Page 2 approximately 1,600 feet from the Arkansas River, and you have provided a monthly schedule of lagged depletions to the river, together with a schedule of replacement requirements that include a transit loss totaling 11.5 acre-feet during the plan year (see Table 4). REPLACEMENT The proposed source of replacement water for this substitute water supply plan is 11.5 acre-feet of reusable municipal return flows from the Cherokee Metropolitan District (Cherokee) wastewater treatment plant in Colorado Springs or other fully consumable water provided by agreement between Beltramo and the Arkansas Groundwater Users Association (AGUA). A transit loss of 17.0 percent (10 percent on Sand Creek and 7 percent on Fountain Creek) has been calculated into the total amount of water purchased, although the actual transit loss will be determined using the Fountain Creek Transit Loss Model. We understand that Cherokee may be moving their wastewater treatment facility to an area located in the Upper Black Squirrel Creek Designated Ground Water Basin. At the same time, the reusable effluent return flow from the facility will no longer accrue to Sand Creek/Fountain Creek, and will no longer be available as a replacement source; however, the effluent will be available at its current location for the duration of this plan.. You have calculated that, based upon the lagging effects, 5.37 acre-feet of depletions will occur after the expiration of this plan (March 31, 2009). Replacement water for these post plan depletions will be secured through an acceptable means of financial security to be maintained by AGUA. The State and Division Engineers have reviewed the plan and the adequacy of each source of water provided for use as augmentation water, including, where necessary, the historical consumptive use of each water right, and return flows from diversion of waters imported into the Arkansas River Basin or other fully consumable waters proposed for use as augmentation water. In accordance with Section 25-8- 202(7), C.R.S. and Senate Bill 89-181 Rules and Regulations adopted on February 4, 1992, the State Engineer has determined that subject to the terms and conditions below, the replacement supply is of a quality to meet the requirements of use to senior appropriators. CONDITIONS OF APPROVAL This substitute water supply plan is hereby approved pursuant to Section 37-90- 137(11), C.R.S., subject to the following conditions: 1. This plan is approved until March 31, 2009. Forward to the Division Engineer within two weeks of this approval, a contact name and phone number at the gravel pit site. 2. The surface area of groundwater exposed within the pit shall not exceed one acre. Documentation of water surface area may be required by the Division Engineer in the