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C HATTON WATER CONSULTANTS, INC. i 11049 W. 44th Ave. Suite 206 Wheat Ridge, CO 80033 (303) 422-5656 Fax 422-5755 January 27, 1999 Mr. Hal Simpson, P.E. State Engineer 1313 Sherman St. Denver, CO 80203 E-Mail - consult(al,,hattonwater.com Homepage - www.hattomvater.com RE: Substitute Supply Plan, North River Pit, owned and operated by All Rite Paving and Redi-Mia, Inc.. Dear Mr. Simpson: All Rite Paving and Redi-Mix, Inc., submits this substitute supply plan for the North River Pit, located in sections of the SE1/4 of Section 36, T23S, and the NE1/4 of Section 1, T24S all in RSSW, Otero County, Colorado (Fig. 1). The following plan is based on the General Guidelines issued by your office in February, 1995. PROJECT DESCRIPTION All Rite Paving and Redi-Mix, Inc., proposes to establish a sand and gravel mining and processing operation as shown on the enclosed location map (Fig. 1). 2. The property comprises approximately 143 acres. The completed operation will result in one lake surface of approximately 142 acres. Exhibit D, Mining Plan Map, is enclosed and prepared for the MLRB 112 Permit Application. Exhibit D shows the azea proposed for mining. At the completion of the mining one lake will remain. The entire pit operation will not be surrounded by a slurry wall, therefore a Glover Analysis was performed. 3. A statutory fee of $ 1,343.00 is enclosed for a new substitute supply plan request. DEPLETIONS 4. The depletions from the mining of the North River Pit will result from evaporation and water lost m the product. The gross evaporation of 45.0 in/y was determined from the NOAA Technical Report NWS 33. The calculation was based on the SEO draft criteria dated February, 1995. In the past, irrigation on the property was by flood irrigation methods using GASP wells and the Ft. Lyons Ditch. Table 1, shows the estimated evaporation on a monthly basis.