2011-04-29_HYDROLOGY - M1986015 - Laserfiche WebLink

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B BA water consultants BISHOP-B ROGDEN ASSOCIATES, INC. January 12, 2011 Mr. Dick Wolfe State Engineer's Office 1313 Sherman St., # 818 Denver, CO 80203 Michael A. Sayler Christopher J. Sanchez Jeffrey A. Clark Charles E. Stanzione Raymond J. Dunn Daniel O. Niemela Laurel E. Stadjuhar SA RE: Renewal of the Substitute Water Supply Plan for Transit Mix of Pueblo's East Pit (#M8601.0 Dear Dick: On behalf of our client, Transit Mix of Pueblo (Transit Mix), we are submitting a request for a renewal of the Substitute Water Supply Plan (SWSP) for their Pueblo East Pit (#M86016) located along the Arkansas River near Pueblo pursuant to Section 37-90-137 (11), C.R.S. The projected mining operations have not changed since we sent our previous renewal request on July 17, 2009. The request was neither approved nor denied. However, Transit Mix has been operating the plan and making replacements assuming the request would be approved and has continued to submit monthly accounting to the State. The last written approval was received on March 13, 2007 with an expiration date of January 31, 2008. We will submit a new well permit application with revised uses once we have received approval of this SWSP request. PROJECT DESCRIPTION The Pueblo East Pit is located just north of the Arkansas River on the east side of Pueblo. Mining is continuing while Transit Mix continually dewaters the East Pit during the mining process; therefore, the evaporation is from the settling and discharge ponds and a small network of ditches used for de-watering. Other depletions include water used for dust control. The depletions are replaced by excess Hamp-Bell Ditch credits from the Chain of Lakes augmentation plan and a water lease with the Pueblo Board of Water Works (PBWW). Figure 1 shows the mining area and exposed ground water surface area at the East Pit. DEPLETIONS The depletions at the Pueblo East Pit include water used for dust control and evaporation from 10.3 acres of exposed ground water. The projected water requirements are summarized in Table 1. The total replacement requirement for the East Pit is projected to be 49.6 ac-ft per year. Transit Mix is currently mining and will continue to mine solely within their Phase 2 pit. A slurry wall was installed around this pit and passed the liner test as indicated in Steve Kuehr's letter to Division 2 dated April 15, 2010. Transit Mix has not yet received an approval letter from the State; however, per Chris Sanchez's January 10, 2011 phone conversation with Bill Tyner, we are submitting this SWSP request under the assumption that