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Revised 11/85 <br />• submitted annual water inflow reports to the Division. These reports, <br />as well as inspections conducted by Division personnel, have verified <br />that to date, no water inflows have been encountered at the Bear No. 3 <br />Mine. <br />As mining approaches the southern extremities of the proposed permit <br />area, information on site specific hydrology will become available, and, <br />as in the past, submitted in the annual hydrologic report. <br />As stated in the Bear No. 3 Permit Revision, the abandonment procedures <br />for the portal areas are as follows: <br />1. A seal will be placed on the portal entries to a point where <br />the overburden is at least three (3) times the height of the <br />coal seam. This seal will be of reinforced concrete of at <br />least 12 inches thick and keyed 12 inches into the coal or to <br />the rock contact. Concrete will be reinforced with a mat of # <br />• inch rebar 12 inches in each direction, each face. Grouting <br />will be used, if necessary, to provide a more uniform seal <br />around the coal or rock contact. <br />2. Earth fill will extend into each portal opening a distance of <br />at least 12 feet. <br />3. Exposed coal outcrop will be covered with a minimum of four <br />(4) feet of non-combustible earth material to protect against <br />spontaneous combustion. <br />The procedures for permanent closure of the portal entries are shown on <br />Figure 2, General Specifications for Permanent Closure of Portal <br />Entries. <br />• <br />-32- <br />