Laserfiche WebLink
<br />Frank M. Graham, Jr. <br /> <br />June 22, 1988 <br />8. It is planned that the pit will be dewatered, and the water will be <br />discharged to Boulder Creek or its irrigation ditches. Please <br />describe your plans to prevent siltation and/or erosion at the <br />discharge points. <br />Exhibit E-Reclamation Plan <br />1. Please discuss your reclamation plan timetable as described in Rule <br />2.12(5)(f). Especially, please estimate the maximum acreage that <br />will need to be reclaimed at aRy one time and what reclamation will <br />be necessary. <br />2. The reclamation plan map (Exhibit F) indicates that almost all of <br />the shorelines will be relatively linear unvaried features. To the <br />extent that this lake will be used for wildlife habitat, the <br />shorelines should be varied with peninsulas, irregularities, <br />islands, and variable depths. You indicated that islands and <br />shallows will be constructed on the upstream (south) side. Please <br />elaborate on your plans to construct islands and shallows. Also, <br />please discuss your plans to create irregular shorelines along <br />other portions of the lake. <br />3. When completed, this site will contain a lake almost a half mile <br />square. We have discovered that wave action in lakes this large <br />typically cause erosional scarps and slumps at water level. Please <br />describe your plans to prevent this problem and for monitoring <br />final slopes for this problem. If such scarps occur, what are your <br />plans to stabilize these areas? <br />~~. Do you intend to re vegetate all portions of the disturbed area? If <br />not, please describe plans to stabilize with. other methods. In <br />particular, will you establish access routes for the gas/oil <br />wells? Will islands be revegetated? <br />Exhibit G-Water Information <br />1. A portion of the mining area lies within the 100-year flood plain <br />of Boulder Creek. Rocky Mountain Consultants estimates that a <br />standard project flood in Boulder Creek would inundate the <br />Cottonwood Farm property. I am concerned that a flood event would <br />overtop the berm located between Boulder Creek and the pit area, <br />and the flow velocities could erode and eventually breach the <br />berm. Your plan indicates that a 100 foot wide undisturbed setback <br />will be maintained between Boulder Creek and the pit. I also see <br />that your map shows a flood overflow located just south of the <br />Cottonwood Farm project. Please provide a discussion on how these <br />measures will be sufficient to prevent undue erosion and berm <br />breaching during a 100-year flood dlpnt. <br />