Laserfiche WebLink
Engineering Analytics, Inc.. 1600 Specht Point Rd. Suite 209 Fort Collins, CO 80525 , 970.488.3111 z www.EngAnalytics.coir <br />Technical Memorandum <br />To: <br />William K. Havengar <br />From: <br />Clint Brown, P.E. <br />Nate Bolles, P.G. <br />Company: <br />Lazy H Inc <br />Date: <br />March 20, 2015 <br />EA No.: <br />110545 <br />Re: <br />Exhibit D — Reclamation Plan <br />Applicant: Lazy H Inc <br />Cc: <br />Rod Baumgartner, Henrylyn Irrigation District <br />A) Sand will be mined to an approximate depth between five and ten feet below ground <br />surface. Reclamation will begin at the conclusion of mining activities. Final excavation <br />slopes will be left at 3H:1 V with a free draining pit floor. No material will be imported to <br />replace the excavated material. <br />B) The final proposed reclamation surface presented in Exhibit E -2 will exist at the end of <br />mining and additional surface contouring is not anticipated prior to revegetation of the <br />mined area. The final pit slopes at the end of mining will have a maximum slope of 3H:1 V <br />and will not require any regrading to achieve geotechnical stability. <br />C) Topsoil removed and stockpiled during mining will be replaced after mining has been <br />completed. Disturbed areas will be reseeded per the NRCS recommendations included in <br />Exhibit D -1. The premining vegetation at the site consists of native grassland and forbs. <br />At the end of mining the disturbed areas will be revegetated. The revegetated area will be <br />approximately 13.5 acres as shown on Exhibit E -2. Vegetation will be reclaimed using a <br />native seed mixture on disturbed areas. Stockpiled topsoil will be spread across the site <br />and tilled to a depth of approximately 3 inches to provide an adequate surface for seeding. <br />Planting of the seeds will occur between November IS' and May 15t1i after the termination <br />of mining. Establishment of new vegetation outside of this time period is not advised <br />because early germination and dry conditions can result in a failed attempt and require <br />reseeding. If soil testing indicates nutrient deficiencies for the specific plant species, <br />fertilizer or compost will be used to assist in plant growth after reseeding. The fertilizer <br />mix will be chosen after soil testing to select the most appropriate and efficient <br />composition. Reseeding using a grass drill to seeding depth of '/4" to ' /2" is the preferred <br />reclamation method and historically has provided the best plant development. However, <br />the applicant may elect to use broadcast seeding or hydroseeding with protective mulch in <br />areas inaccessible by the grass drill equipment. Where broadcast seeding is used, the seed <br />mixture should be incorporated by raking or harrowing the seed. Shrubs and /or trees will <br />not be planted. The vegetation growth and density will be documented at the end of end <br />of the first growing season. Post reclamation inspections to document vegetation growth <br />Exhibit D.docx 1 Engineering Analytics, Inc. <br />