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details on the maintenance requirements. Please also include any hydrologic demonstrations required <br /> to illustrate that the size of culvert will be adequate to convey any potential flows in the ditch. <br /> Response: The attached drawing titled"Climax Mine Access Relocation—Storm Sewer Plan& <br /> Profile—Sheet C400"indicates the type of culvert to be used, length, diameter,and slope of the <br /> culvert, as well as details on the construction of the inlet and outlet structures. Annually preventative <br /> maintenance will include an inspection of the culvert and inlet/outlet structures to determine if clean <br /> out or repair is required. The culvert will be 48 inches in diameter and is oversized to reduce the <br /> amount of maintenance required. Please find the attached memo that describes the hydrologic <br /> demonstration illustrating that the size of the culvert will be adequate to convey any potential flows in <br /> the ditch. <br /> Please contact Raymond Lazuk at 719-486-7584 or me at 719-486-7525 if you need additional <br /> information. <br /> Sincerely, <br /> Diana Kelts <br /> Chief Environmental Scientist <br /> attachments <br />