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'90 O1i18 1802 S 303 985 9947 SRK DENVER <br />• <br />BATTLE MOUNTAIN RESOURCES, INC. <br />ADEQUACY RESPONSES - ADDITIONAL INFORMATION <br />PAGE 5 OF 1 <br />review and approval as required by Section 1.6 of the Mineral Rules and <br />Regulations. <br />31. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />32. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />33. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />34. The Comment was satisfactorily addressed in the January 9, 1990 submittal, <br />35. The comment was satisfactorily addressed in the January 9, 1990 submittal <br />36, Please commit to providing a map showing the drainage Layout at least 30 <br /> days prior to mill construction, <br />The complete drainage layout and designs will be submitted for approval <br />at least 30 days prior to commencing construction of the mill facilities. <br />37. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />3B. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />39. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />40. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />41. The comment was satisfactorily addressed in the January 9, 1990 submittal. <br />42, Please provide a map delineating the drainage areas referred to as Area <br />1 through Area 5. Please provide additional clarification on why the 100 <br />year 24 hour storm event war used to determine velocities. The Division <br />suggests that parabolic channels be constructed instead of V-shaped <br />channels to approximate the natural channels in the area. Please commit <br />to monitoring the channels for sediment build-up or erosion to ensure that <br />the channels are functioning properly. <br />Figure E-2 is provided to delineate the drainage areas 1 through 5 on the <br />reclaimed tailings surface. <br />The velocities presented in the response were actual velocities for the <br />2 year 24 hour storm event and not the 100 year 24 hour event indicated <br />in the response. <br />BMR has designed V-shaped channels to keep the channel area as small as <br />possible as an aid in maintaining as consistent a velocity with varying <br />flows across the tailings as possible to help prevent sediment deposition. <br />Parabolic channels will result 1n varying channel velocities and sub3ect <br />to flow may result in deposition and subsequent remobilization of sediment. <br />07 <br />