2014-01-22_PERMIT FILE - M2013064 (10)

Home Browse Search

included as an addendum to this submittal. . As can be seen, the soil stockpiles as they encompasses portions of the west and north lot line of the Corral parcel, will function to further limit operational effects to the nearby residence. A typical cross - section will encompass an area nearly 75 feet long, at 3 feet in height with 3H:1V slopes for a total width of 21 feet. The cross - sectional area is sufficient to store the necessary volume of soils needed for reclamation, as detailed under part 12, below. 12.The Applicant proposes to replace a minimum of 6 inches of topsoil on the reclaimed areas. The NRCS soils report states topsoil depths ranges from 0 to 48 inch in the majority of the South and Middle Fields and the report by AWES, LLC dated July 22, 2013 states three to five feet of topsoil is present based on soil borings conducted on the site. Additionally, only approximately 10% of the mined area will require topsoil replacement due to the creation of the clay lined reservoir. Therefore, the Applicant should replace topsoil to a depth at least equal to the existing topsoil depth of three to five feet. Please commit to replacing topsoil to a minimum depth of three to five feet over the reclaimed upland areas. Exhibit C -1: Existing Conditions Map, show the two predominant soils within the extraction limits. Both are commonly associated along alluvial pathways and floodplains along the Front Range. Middle Field is dominated by Soil Unit 10 - Bankard Soils, with some overlap of Soil Unit 3 - Aquoll /Aquent Soils, which essentially covers the balance of South Field. The Bankard Soils have a Soil Series Description. The Aquoll /Aquent Soils do not. This is an important distinction, since soils lacking a soil profile description are generally considered Entisols, while those with poorly formed profiles may be considered Inceptisols (please refer to attached descriptions of Entisols and Inceptisols). Generally, topsoil is understood to be the A -1, or more generously the upper A profile of a developed soil profile; and otherwise - where it exists - the Ap or `plow layer' where it is either absent or in the event where it is shallower than the six inch plow layer, made deeper by cultivation and assigned the Ap designation. In poorly formed soils, there is no distinct soil pedon and soil depths can vary dramatically every three feet or so. Contrary to the American propensity that more is better, such is seldom the case in soil as it increases in depth from the surface. Commonly, in all soils, but especially in poorly developed soils, the deeper you go, the less organic matter, the lower the fertility, and the poorer the soil texture, if any. A lack Varra Companies, Inc. Coulson Resource Project OMLR M- 2013 -064 7 Correspondence to Peter Hays 21 January 2014