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Mr. Jeffrey A. Clark <br />BBA Water Consultants, Inc. <br />333 West Hampden Avenue, Suite 1050 <br />Englewood, CO 80110 <br />DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br />September 24, 2009 <br />RE: Consolidated Substitute Water Supply Plan <br />Valco Inc. Gravel Pits <br />Canon City East M-77-559 Sec. 1- T19S - R7OW <br />Rocky Ford East M -77 -560 See. 21- T23S - R56W <br />Lamar East M- 77-572 Sec. 29 - T22S - R46W <br />Plan Period: June 1, 2009 — May 31, 2011 <br />Bill Ritter, Jr. <br />Governor <br />Harris D. Sherman <br />Executive Director <br />Dick Wolfe, P.E. <br />Director <br />Dear Mr. Clark: <br />We have reviewed your June 4, 2009 letter requesting renewal of the substitute water supply plan <br />for the above referenced gravel pits owned by Valco Inc. The required $771 fee has been paid (transaction <br />numbers 3640629 and 3641592). This approval will cover the period June 1, 2009 through May 31, 2011. <br />Plan of Operation <br />The three gravel pits listed above will continue to be operated as in the past. The maximum <br />expected ground water surface areas that will be exposed during the term of the SWSP are summarized <br />below. <br />Total Pre -1981 Post-1980 <br />Weil Well Exposure Exposure Exposure <br />Pit Permit ID acres (acres) acres <br />Canon City East 52183 -F 1205760 30.1 15.4 14.7 <br />Rocky Ford East 52017 -F 1705986 47.3 17.4 29.9 <br />Lamar East 52184 - F 6706353 35.4 13.2 22.2 <br />Depletions <br />The maximum annual consumption that will occur during this plan at each pit is given below. Both <br />the Canon City East Pit and the Lamar East Pit are within 100 feet of the Arkansas River. Therefore, you <br />state that depletions to the river system are considered instantaneous and will occur within the same month <br />as the accounting. The monthly accounting projections for these two pits are given in your Tables 2 and 4, <br />,.respectively. The Rocky Ford East Pit is greater than 100. feet from the Arkansas, and the tagged effects <br />have been calculated using the Glover- based tSD AWAS. The monthly distribution of the values, and the <br />lagged affects on the Arkansas River, are detailed on Table 3, which is attached. <br />Office of the State Engineer <br />1313 Sherman Street, Suite 818 • Denver, CO 80203 • rhoue: 303- 866-3581 • Fax: 303-866-3589 <br />www.water.state.co.us <br />