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<br /> Environmental & EngineeringWeiland, Inc.W I <br />6.4.4 EXHIBIT D - Mining Plan <br />5. In Item (c) it states that no surface water diversions are planned for the site. In Appendix <br />A, Item 2.4, page 3, it states that a diversion swale will collect surface runoff south and <br />west of Cell 2A and route the water around the reservoir. No other details were <br />included in the application. Please clarify the following: <br />a. Will a swale be constructed around Cell 2A? <br />Not during the mining plan, however as part of the reclamation plan, a swale will <br />be constructed around Cell 2A for the purpose of diverting stormwater runoff from <br />being impounded by the reservoir. <br />b. If a swale is planned, include a discussion addressing: the purpose, anticipated <br />impact to the surface water and if it’s a permanent feature. <br />Text has been added to Exhibit E- Reclamation Plan to point to the Goose Haven <br />Reservoir Complex Expansion Project Cell 2A Hydrology Report. (Exhibit E <br />Attachment B) <br />c. Submit construction designs. <br />The grading plan for the swale is given in Exhibit F Sheet 2 previously submitted. <br />Additional details can be found in the dam design documents and drawings <br />previously submitted in Exhibit E Attachment A. <br />6. Cell 2A is being constructed in accordance with Rule 8 of the 2020 Rules and Regulations <br />for Dam Safety and Dam Construction and is being overseen by the Colorado State <br />Engineer. Please commit to submitting the final dam construction report, as-built plans <br />and the final certification for inclusion into the permit when these documents are <br />obtained. <br />The City of Lafayette will commit to submitting the final dam construction report, as- <br />built plans and the final certification for inclusion into the permit when these <br />documents are complete. <br />6.4.7 EXHIBIT G - Water Information - <br />7. A well location map for the surrounding area was submitted with the original permit <br />application in 2010. Please submit an updated well location map and include depth of <br />wells as part of the data set. <br />The location of Piezometers has been added to Exhibit C. The well depths and drill logs <br />have been added to Exhibit G Attachment A. <br />8. There are two properties within 200 feet of the western permit boundary. There are <br />several structures and private ponds located on each of these properties. The houses on <br />these properties will be within 200 feet of the proposed clay lined pond. A ground water <br />hydrological analysis of the potential impacts to these properties needs to be submitted <br />as part of the application package. <br />These ponds are lined ponds fed by surface water from Lyner Cottonwood Ditch and <br />are not in hydrologic communication with groundwater. A 6” perforated perimeter <br />drain along the south boundary of Cell 2A has been installed and has been observed to <br />flow up to approximately 0.25 c.f.s. during periods when the fields to the south are <br />being irrigated. This drain has been effectively keeping the south slope of the