Laserfiche WebLink
<br />possible contractors. Concerning the Hydrology Review Memo, please find the <br />applicants comments below. The comments are addressed in the same order presented <br />in Ms. Pickford's 5/4/08 Memo to you as follows: <br />1. The applicant agrees that the pond cannot pull groundwater from the <br />surrounding areas, especially from the Deep Cut Ditch. The static pond water <br />level at any given time will reflect the (seasonal) surrounding groundwater <br />levels and conditions in the area. Further, the pond will be up-gradient to the <br />Deep Cut Ditch and the north pond edge will be 150 feet from the ditch inlet <br />and more than 300 feet from the "Main Channel" of the Yampa River. Both <br />the Deep Cut bitch head-gjte and ditch are more than 400 feet from the <br />planned edge of the pond invert. Estimated average pond water levels will be <br />+/- 6196. Until the SW permit is revised allowing dewatering to the Yampa <br />River, the site will dewater to a sediment pond separated from the main pond <br />footprint excavation area.. The sediment pond will be located on the north end <br />of the excavation footprint adjacent to the inlet. Water pumped to the sediment <br />pond could then recharge to the inlet/river via groundwater. <br />2. The applicant has proposed annual pond edge reclamation using the salvaged <br />topsoil from the site. This should limit the amount of stockpiled topsoil <br />located in the flood plain from season to season. Any topsoil stockpiles left <br />over one year (due to late season operations) would be seeded for stabilization. <br />The site inspection and wetlands study have shown that topsoil at the site is <br />generally thin and somewhat limited. All available topsoil will be reserved as <br />planned for reclamation activities along the pond edge. If any offsite topsoil <br />material is necessary to enhance site reclamation, the imported soil should be <br />(will be) "clean soil". The planned temporary topsoil stockpiles will be located <br />within the 50 foot buffer zone next to the pond edge. Spring 2008 High Flow <br />levels in the Yampa River at the site (the highest in recent times) had no affect <br />to the Deep Cut Ditch inlet and did not flood any part of the site south of the <br />ditch inlet. <br />3. The Deep Cut Ditch O«rnership has stated during both the Moffat County <br />Planning Commission and BOCC hearing that the Deep Cut Ditch has been in <br />use for over 100 years at this location with minor repairs. As stated above, <br />"the north pond edge will be a minimum of 150 feet from the ditch inlet and <br />more than 300 feet from the "Main Channel" of the Yampa River. Both the <br />Deep Cut Ditch head-gate and ditch are more than 400 feet from the planned <br />edge of the pond invert." The ditch inlet is inside the permit area, The ditch <br />inlet and other Man-Made Structures within 200 feet including, the Deep Cut <br />Ditch, ditch head-gate, fences, and access road are covered by the required <br />Exhibit S - "Promise to Correct - Damage Agreement". The applicant has also <br />had discussion with the Deep Cut Ditch ownership about their maintenance <br />responsibilities for their ditch inlet. They have easement rights to maintain the <br />inlet and clear debris/driftwood from their head-gate. If the ditch inlet <br />becomes "too clogged" with stumps and driftwood (as seen this spring) it