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IV. Construction Summary and Narrative <br /> The contractor's pre-bid tour for both phases of the Sherman Mine Project took place on June <br /> 19, 2007. This date was as early as we were able to access and see most of the site, although, <br /> there was still a considerable amount of snow on the site. <br /> Sherman Mine Reclamation Project, Demolition Phase <br /> Construction of the Sherman Mine demolition phase portion of the project began the week of <br /> August 20, 2007. The contractor re-established the access road across the stream channel, <br /> and began removal of the transformers and power line and the mine fan building. They then <br /> moved on to demolition of out buildings, and sorting and hauling of scrap metal and burning of <br /> timber. <br /> Several unforeseen conditions onsite prompted change order number 1 to be issued for: <br /> • Large items buried under snow not visible during pre-bid <br /> • A failing crib wall creating unsafe working environment <br /> • Asbestos abatement <br /> • Weather delays <br /> By the end of September the majority of the bath house had been removed and preliminary <br /> demolition work on the shop building had begun. Work began on the south portal to grub it out <br /> and prepare it for closure. <br /> High winds and inclement weather limited the amount of work that could be performed on the <br /> exterior of the buildings. By mid September the interior of the bath house and its exterior tin had <br /> been removed and hauled away. A snow storm dumped four inches of snow on the evening of <br /> September 16, 2007 causing a construction delay. <br /> Winter weather conditions were persistently bad in early October and change order number 2 to <br /> suspend work and demobilize was issued on October 18, 2007 due to the deteriorating <br /> conditions at 12,300 feet in elevation. <br /> Above average snowpack delayed the start of work at the site until July 23, 2008. Sometime on <br /> July 26 or 27, 2008 the pre-existing solid ice plug in the south portal blew out releasing several <br /> million gallons of water causing significant erosion and transporting approximately 10,000 cubic <br /> yards of material to the bottom of the mine dump and into the drainage. This event required an <br /> additional week for the contractor to re-establish access, dig a ditch to handle the approximately <br /> 400 gallons per minute of water flowing out of the portal and across the site before continuing <br /> with the demolition work, which resulted in change order number 3. <br /> The removal of the shop building continued through August. Wood debris was burned on site <br /> and scrap material hauled away. The north portal was safeguarded with a 24 inch diameter, 20 <br /> foot long culvert with locking door. The south portal was closed using a 60 inch diameter, 50 <br /> foot long culvert with locking door. The demolition phase of the project was completed on <br /> August 25, 2008. <br />