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TETRA TECH RMC Ms. Madoline Wallace January 5, 2004 Page 2 Exhibit E- "7he Smith-Emmons ditch fs located Z00 feet from the western properrl~ boundmy and will be relocated along the western edge of the property. The mining boundary minimum offset from the western property line is 10 feet. Once the deposit is removed overburden will be compacted for dte new ditch according to engineered build (sic) plans taking into consideration water floaa~ rates and allorming for the 70- joot easement." Exhibit F - Includes a label along the western property boundary stating "Smidr & Emmons Ditch Relocation", and another label in the vicinity stating "70.0' Easement". Exhibit G - "A portion of the Smith and Enmtons ditch will 6e relocated Yo facilitate mining." Exhibit L - $150,000 of Performance Bond is allocated for Smith & Emmons ditch relocation. Geotechnical Stability Exhibit - "Therefore, we reconmrend that there bean offset ofa minimum of 50 feet from waterways, where no mining takes place. From that paint, the 3: ]slope discussed above would be applicable." With such little information to review we can only offer general comments at this time. Approval by the Ditch Company of any relocation of the Smith & Emmons Ditch can only be recommended after review of detailed plans for the protection, removal, and relocation of the ditch including any appurtenant structures required for the relocation. Lafarge should provide the following for review: 1) Detailed mining plan and schedule. A plan and schedule of how mining will proceed prior to relocation of the ditch, and when that relocation is proposed to be accomplished is needed. The ditch must be kept in continual service throughout the irrigation seasons of April through October. Relocation of the ditch may only take place in the non- imgation season and only with approval of the Ditch Company. 2) Detailed construction plans and specifications for the new segment of the ditch. The plans should include the locations, elevations, grades and cross-sections of the new ditch, the materials and methods of construction proposed to be used in the reconstruction. Detailed plans should also be provided for reconstruction of the concrete division box currently located just north of WCR 20%i so that the wafer will be directed to the west and precluded from being directed east or north. Detailed plans of all new appurtenant structures are also required. 3) Detailed plans for any proposed utility crossings of the existing or relocated Ditch. 4) Detailed plans for any proposed enclosed pipes to carry the relocated Ditch.