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,. <br /> <br />Permanent surface water retention berms at the downslope (east) perimeter <br />of each disturbed area shall be constructed per the site's qualifyine Srornnvarzr <br />Plnn, 2hf22 feet high and approximately nine feet wide at the base. Berm <br />material shall b2 the subsurface silty clayey soils taken from the striped area of <br />each mining unit. Placement and re-vegetation of retention berms shall be at the <br />time of the initial surface disturbance of each mining unit. [The north side of <br />each unit will not require water retention berms since the subsoil overburden <br />from the north half of each mining unit in the stripping stage of operations shall <br />be dozed into a long pile at the north boundary of each successive unit, and thus <br />effzctively block any northerly surface flow, if such flow actually did exist. <br />However the stripped excavation unit shall intercept any surface flow anyway and <br />direct it internally into the mining excavation, thus preventing off-site outfall of <br />whatever surface waters that may exist.] <br />7) GROUNDWATER <br />Groundwater .vas not encountered in the exploration test pits excavated to <br />depths of up to 12 feet throughout the site. Un-reclaimed gravel pit excavations <br />in the adjacent neighboring (upslope) property to the west show no sign of <br />groundwater at similar depths. The gentle westerly gradient of the underlying <br />relatively imperious subsoils beneath the perched gravely deposit would not be <br />expected to trap and retain any groundwater percolating through the gravels. No <br />shallow water wells have been presently nor historically located in the ~avely <br />deposit. Stockwater must be hauled to the site for the benefit of the grazing <br />lessee. Quite simply, as previously stated in the application, there is no <br />groundwater to be affected by the shallow excavation and processing of gravels at <br />the site. Gravel excavation and production operations do not utilize any acid <br />forming nor produce nor expose any toxic chemicals nor substances. Any fuels or <br />lubricants stored on site shall be confined in a State of Colorado qualifying <br />bermed enclosure having an 80 mil impermeable liner capable of containing <br />I50% of the fluids stored. Trained emergency cleanup personnel and required <br />cleanup materials shall be located at the site. <br />Claims made that these operations can effect deep water wells a quarter mile <br />distant having a surface 30 to 40 feet stratigraphically below the average elevation <br />of the proposed operational site defy geologic credibility. To be taken seriously <br />any such claims must be offered with some credible demonstration of proof. <br />8) RECLr+u~L4TION PLAN MAP -GRADIENTS <br />The lack of sut2iciently detailed test hole patterns, and the prohibitive cost <br />and environmental disruption involved in providing such, prevents the generation <br />of detailed ground contours of the finished surface. From the data that was <br />collected it is expected that a gently undulating surface with a slight varying (1 to <br />3 %) gradient to the west will result from the finished operation. That <br />expzctation has been noted on the revised "Exhibit F "Reclamation Map" that is <br />enclosed. This we think satisfies the letter and intent of Rule 6.4.6(a). <br />