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<br />Santa Maria Reservoir ~~any <br />May 17, 1994 <br />Page - 2 <br /> <br />. <br /> <br />Because of the efficiency obtained at Rio Grande Dam, we recommend the services <br />of L.A. Smith Drilling Company, Inc. Their address is: <br /> <br />Audie Smith <br />554 Rio Oso Lane <br />Grand Junction, CO 81503 <br />(303) 242-6777 <br /> <br />We plan to install piezometers in each of the proposed borings. The slotted section <br />of each will be located within the bottom 10 or 20 feet of each hole depending on the <br />dimensions and water level characteristics found during drilling. It is our intent to monitor <br />the blanket drain under the downstream shell, the downstream filter zone and the contact <br />between the impervious core and the left abutment rock. Details of the testing and <br />monitoring program will be prepared for state review prior to the stan of drilling. <br /> <br />We can stan work as soon as access to the site is available. There is preliminary <br />work required on the analyses to set up the model and prepare for the field data. <br /> <br />Included please find L.A. Smith's Cost Estimate and our preliminary cost estimate <br />for Phase I, dated October 28, 1993. Also, to compete the package a copy of our total <br />scope of work submitted December 3, 1993 is included. <br /> <br />It is a pleasure to be able to assist you on this project. If you have My questions <br />please ca1l our office at (206) 882-2455. <br /> <br />Very truly yours, <br />Harza Northwest, Inc. <br /> <br /> <br />R. . Bielefeld, CEG <br />Principal Engineering Geologist <br /> <br />cc: William Paddock <br />RJB/sdc <br /> <br />Page 3 of 15 <br />