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AREA SIZE <br />Pond H 1.5 acres <br />Pond F 5 acres <br />Rail Spur 2.75 acres <br />Mine 2 8.3 acres <br />Mine 2 access 5.6 acres <br />SEDIMENT CONTROL <br />established vegetation <br />rock filter/established vegetation <br />silt fence/established vegetation <br />good vegetative cover <br />stock pond sump/rock filters <br />For additional specifics on the currently approved Small Area Exemptions see permit renewal <br />pages 780-208-2 to 780-208-4(a) (4.05.2(3)(b)(i)). <br />B. Stream Channel Diversions <br />Certain azeas of the Eckman Park Mine were identified as having erosional <br />problems as eazly as 1986. These problems manifested themselves as massive <br />gullies and erosional features in areas 9/10, 41 and 51 and precipitated NOV C- <br />86-061 in 1986. A Permit Revision (PR-02) was filed in 1987 to abate this NOV <br />and propose a solution to these problems. Details related to this revision can be <br />found in two binders titled "Postmining Topography Permit Revision." <br />Fortification of the drainways involved large volumes of riprap as channel <br />protection; therefore, <br />1. Channel lining structures, retention basins, and artificial channel roughness <br />structures aze proposed for use to control erosion. These means are <br />proposed to be approved by the Division since they are necessary to <br />control erosion, they aze stable and will require infrequent maintenance <br />(4.05.4(2)(a)). <br />2. The permanent diversions shall make use of artificial structural controls in <br />order to allow them to remain in dynamic equilibrium with the drainage <br />basin system. The Division proposes to approve the use of such structures <br />(4.05.4(4)(b)). <br />C. Surface and Ground Water Monitoring <br />21 <br />