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a ATTACHMENTI • SENECA COAL COMPANY Seneca II-W MINE NOTICE OF INTENT TO EXPLORE Part II Supporting Documentation ITEM 3 All surface areas to be accessed during the exploration program is within the current II-W Mine permit area and is either owned or leased by Seneca Coal Company. The applicable information is included in the Seneca II-W Mine Permit Application Package in Tab 3, Adjudication File. ITEM 4 The locations of the proposed exploration sites are shown on Map 1, 2003 Exploration Program. A description of the lands to be affected by this exploration program is included in the Seneca II-W Mine Permit Application Package in: • Tab 4, Premining Land Use • Tab 7, Hydrologic Description • Tab 9, Soil Baseline Study • Tab 1Q, Vegetation • ITEM 5 S.a - Nazrative Description SCC proposes to conduct coal exploration and verification investigations on property and coal currently controlled by SCC (see discussion in Item 3). The purpose of the exploration is to verify and determine the presence and continuity of the Wadge coal seam. There are 19 exploration sites proposed. Sixteen of the proposed drill holes will be located adjacent to existing roads or in permitted disturbance areas. The other three locations will require new disturbance to access the sites. These sites are indicated on the attached Map 1, 2003 Exploration Program. The new access routes will be field adjusted to reduce the amount of disturbance possible; brush will be pushed aside and the ground leveled just enough to allow the drill rig to access the pad location. Eight of the proposed drill pads (#2, #3, #4, #8, #10, #12, #14 and #1G)) are located in watersheds without approved sediment ponds, SCC requests that these sites be approved as Small Area Exemptions (Rule 4.05.2(3). The documentation/demonstration required for SAE status is provided in Attachment lA, Hydrologic Documentation for Small Area Exemption. The typical drill pad for the exploration holes wiU be approximately 100 feet by 100 feet and contain a 25-foot by 25-foot mud pit. The active drill pad will have a topsoil berm along the upgradienx perimeter that will direct runoff from undisturbed areas around the outside of the pad area. The remaining perimeter, except for access en[ry, will have an earthen berm and ditch to contain all runoff from a 10-yr/24-hr storm event. A two-foot high berm will be • constructed around the majority of the pad to control both surface water mn-on and run-off. The down gradient berm will be constructed along contour. To ensure that the run-off from a 10-yeaz, 24-hour event is contained, a containment ditch will be constructed parallel to the down gradient berm as shown on attached Figure 1, Typical Drill Pad in Attachment lA. The ditch will be approximately 2 feet deep with 1.SH:1V and 3H:1V 7