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Ms. Candace Thompson, MLR <br />September 9, 1986 <br />Page 2 <br /> <br />rip-rap, with the possible exception of the exit into Dutch <br />Creek. The greater part of this flow comes from culvert B-1 <br />on Road B. The 10-yearJ24-hour peak discharge is 6.6 c.f.s. <br />The proposed diversion ditch (see Cross-section A-A) will <br />hold 15.cfs +. <br />It is estimated that some 16 to 18,000 cu. yds. of mate- <br />rial will be mined from the tunnel in the next five months <br />(completion to No. 2 Mine). The proposed fill would contain <br />an estimated 9,900 cu. yds., thus it should be completed in <br />three months. <br />Please call me if you .require more information, or if <br />you have questions. <br />Sincerely, <br />n <br />U <br />Dj4Bowman : ms <br />~ w~K <br />Environmental Coordinator <br />Enclosures: 3 maps <br />Permit revision application <br />Public Notice <br /> <br />143 <br />