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<br />to deface the structure with graffiti. This could result in objectionable <br /> <br />aesthetic qualities for the public and project personnel and a high maintenance <br /> <br />cost for the frequent removal of the graffiti. A varial:ion of this alternative <br /> <br />could be a bin wall, which might reduce visual obstruct:i,on, <br /> <br />While the placement of additional earth on t:h.e crest and downstream face of <br /> <br />the dam should present no significant pegal:ive ,environment:al problems in itself, <br /> <br />there could be adverse impacts stemming from the location and acquisition of the <br /> <br />necessary volume of earth to complete the proposed project. Some locations would <br /> <br />be more sensitive than others to this type of activity. Until an exact location <br /> <br /> <br />for a borrow area is stipulated, it is impossible to accurately describe any <br /> <br />possible environmental impacts that could result. In any event. proper and <br /> <br /> <br />appropriate construction methods should be employed to minimize the possibility <br /> <br />of excessive soil erosion from the project site, especially when considering the <br /> <br />slope of the dam face. <br /> <br />Given the location of the proposed construction of these two project <br /> <br />alternatives, no federally listed threatened or endangered species should be <br /> <br />affected. Noise, fumes, and fugitive dust: would be associated with the <br /> <br /> <br />construction and may pose an adverse impact: to nearby residential and conunercial <br /> <br /> <br />neighborhoods due to their close proximity to the Cherry Creek Project. The <br /> <br />accumulated listing of the National Register of Historic Places was consulted and <br /> <br /> <br />no sites currently listed are located in the arooa of these project alternatives, <br /> <br /> <br />This statement does not apply to any bOrrO'\ll area, ho\tJ'ever I since an exact <br /> <br />location for such an area is not known at: this time. <br /> <br />EVALUATION OF ALTERNATIVES <br /> <br />EVALUATION FACTORS <br /> <br />Each class of alternatives was evaluated for five factors. <br /> <br />These are <br /> <br />Hydrologic Safety, Performance Reliability ,Environmental Acceptance, Damage <br />Increase Over Existing Conditions, and Cost. <br /> <br />63 <br />