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electrical fires within the subject property or adjacent properties. The resulting damage <br />is generally not covered under home-owner insurance policies, potentially increasing the <br />District's liability. <br />The No Action Alternative will result in continued difficulties for the District. Ultimately, <br />such exposure may cause even greater problems such as boil orders, mandatory water <br />use restrictions, and increased legal responsibility. <br />Alternative No. 1— Canterbury Pump Station and Delivery Pipeline to the Evans <br />Gulch Water Treatment Plant <br />Alternative No. 1 involves the installation of a vertical bore, or well, into the tunnel at a <br />location where the tunnel is believed to be sound. Enclosed as Figure No. 4 is a <br />geological profile and plan view of the tunnel prepared for professional paper No. 235, <br />published by the USGS. A pump would be installed in the well to withdraw water from <br />the tunnel. A pipeline would be installed to convey the tunnel water to the Evans Gulch <br />Reservoir and Evans Gulch Water Treatment Plant. <br />A location has been selected for the installation of the vertical bore into the tunnel. This <br />location is near an abandoned shaft known as the Roseville Shaft and is approximately <br />1,600 feet from the tunnel portal. According to the geologic profile, the shaft is located in <br />the portion of the tunnel driven through a hard rock formation. At this location, the depth <br />to the tunnel is approximately 250 feet. After the tunnel is located using small diameter <br />test holes, a larger diameter hole, or well, would be drilled that would allow for <br />installation of a vertical turbine pump. It is anticipated that this bore would be about 20 <br />to 24 inches in diameter. <br />A small enclosure would then be constructed over the well that would house the pump <br />and electrical equipment. The size of this building would be approximately 200 square <br />feet. Preliminary plans are to install a pre-engineered masonry building. Power would <br />be provided to the site by running a distribution line from an existing nearby XCEL power <br />transmission line. Access to the well site would be provided by an existing roadway that <br />_J W. W. Wheelsr ond Assoclotas, lnc. 5/19/2010 Final <br />— 1 Watar flesourcas Enginsars Page 15 <br />