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Section 3 <br />West Sunday Mine <br />3. 40 foot-wide, 170 foot-long, and 5 foot-deep catchment basin having 1.5:1 bank <br />slope is recommended at the north end of Basin 4 to contain the 100-year, 24-hour <br />storm event. <br />4. The existing berm along the western basin boundary should be extended to the <br />south to enclose Basin 4. <br />5. The existing constructed channel in Basin 4 should be extended to the proposed <br />catchment basin. <br />A plan view of the catch basin and channels is included as Exhibit B-1 and details are <br />included in Exhibit B-2. <br /> <br />3-5 <br />0:184988 - Denison\Task Order 1 - Sunday Mines Drainage Study\ReporhFinal Report'Flnal Sunday Mines Drainage Repon_052208.doc