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Larry Damrau -4- January 23, 1985 Hccess KOdds The following items have been identified as problems. Any changes that are needed must be incorporated into the permit application. r 1. The access road marked on i~1ap 15, Surface Support Facilities and Structures, shows a 12 inch diameter culvert not shown on Figure 4, Access Road Profiles. This should be shown on the profile. 2. Map 15, Surface Support Facilities and Structures identifies a road east of Sediment Pond E as an access road, however, this road is not addressed in the text. Please clarify, Ponds, Impoundments and Diversions The following items have been identified as problems. Any changes that are needed must be incorporated into the permit application. 1. Exhibit 8 Sedimentation Pond Design, contains many references to Energy Mine PJo. 3 including several references to Map 8a, Energy i4ine Plo. 3 l/// Surface Water Hydrology. Since this map and related items are not contained in this permit application it would be helpful to either change these references or add a note to the reader explaining where the referenced material can be found. 2. From Table 1, Sedimentation Pond E Design Specifications it is shown tf)at there is 0.1 feet of freeboard between the principal and emergency C )L spillways. The text references that t'rie design specification allowed r'or a minimum of 1.0 feet of freeboard between the emergency and principal spillways whicf) is tf)e reryuirement of the Regulations- Please clarify. ~~71,. ..J ;iii, ,ri'I the ~fldril•il',III _~ULiI:.•i _. :, ..., ~(1:i ~J ~i';~' - ~- 1JJ' ~:..~ i without outflow in the emergency spillway. Rny a!~.fitional sediment will cease outflow througfl the emergency spillway of a 10 year - 2~ hr storm. This needs to addressed. 4. It would be helpful to the reader who is not familiar with ti)e original Energy No. 3 permit to add a note to the rnap titled Energy Mine No. 3 Ditch and Dam Profiles to explain that Ditches Pl and P2 are part of the Energy htine PJo. 3 permit application. Alluvial Valley Floors 1. The tipple area is situated on 25-35 feet of fill. The text states that this fill was installed to elevate the tipple facilities above the flood plain. If this is the case, a discussion of the tipple fill and removal should be contained within the permit application. For a more detailed explanation see the Alluvial Valley Floor section of the proposed findings. 2. Page 2.06-12 references 2 areas ackno~rledged as meeting the geomorphic criteria of alluvial valley floors. The same paragraph lists three areas. Page 2.09-19 also references only 2 areas. Please clarify.