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SENECA II-W MINE 2006 ANNUAL RECLAMATION REPORT 2006 DISTURBANCE AREA There were no addidoaal acres disturbed in 2006. The Seneca fI-W mine area has been continually reviewed and revised (based on physical surveys and aerial photography) to accurately portray the categories of activities; the Final disturbance boundary has been revised to match the aerial photography disturbance; permanent roads and ponds mere delineated. The total disturbed area has been revised to 1,3875 acres. This acreage change is reflected on the CDRMS Annual Report Form and is included in the text of the following report. The 2006 Redamation Map portrays the revised disturbance boundaries but does not include or show the 96.6 aces associated with the Tie-Auoss- Haul Road. BACBFILLING AND GRADING A total of 159 acres were graded in 2006. $ackfilling and grading operations occurred in the South Wadge and Sage Creek/Wolf Creek pit areas. This azea is shown on the Seneca II-W Mine 2006 Grading Map. TOPSOIL AND SPOIL MONITORING SCC is required by Permit C-82-057 to monitor the salvage, smrage, and redistribution of topsoil and spoil handling operations at Seneca II-W Mine. Specific programs include documenting topsoil recovery, verifying topsoil redistribution thickness, determining final graded spoil suitability, • determining topsoil fertility, evaluating plant tooting characteristics, recording the source of replaced topsoil, and completing an annual topsoil balance. The following sections present the soil and spoil monitoring data for the 2006 calendar year. The results of topsoil/spoil monitoring for 2006 are included is the attached Soils Report • Topsoil Recovery Documentation There was no additioaa] topsoil recovered during 2006. • 20(16 Topsoil Replacement Thiclmeas Mining, to document and record the topsoil replacement thickness fox each reclamation block using a minimum sampling intensity of one hole per five acres. The topsoil replacement thickness information is used to adjust future topsoil replacement projections, if necessary, and for bond release purposes. Sampling is conducted on a 500-foot grid. There were twentp-two (22) samples collected on a 500 ft. grid over the 2006 topsoil replacement area, which indicated an average topsoil replacement thickness of 1.3 feet (15.7 inches). See the Soil/Spoil Sample Locations Map and'I'able 06.6, Seneca II-W Topsoil Depth Samples for further documentation. • Spoil Suitability There were twenR°-eight (28) regraded spoil samples collected withi<t the final graded areas during 3006. The samples were aniltied for pH, saturation percentage, electrical conductivirc (EC), sodium adsorption ratio (SAR}, texture, nitrate-nitrogen, and acid-base potential (ASP) to detemune . suitability. All regraded spoil samples have "good-rated" suitable quality material. The 2006 Soils Report is attached and provides the discussion, analytical data, and sampling locations from the 2006 sampling effort.