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Task 1 - STEEL CULVERT REMOVAL <br /> A concrete headwall anchors the steel culvert into the concrete flume at the top of the culvert. <br /> This concrete will be removed from within the concrete flume so that the flume is returned to <br /> its original shape. It is estimated that 24 cubic yards of concrete will be removed from the <br /> headwall area of the flume during the demolition process. After removal of the anchoring <br /> concrete, the steel culvert will be removed from the concrete flume. The steel culvert is fitted <br /> one piece inside another at five places along the length of the culvert. The culvert may be <br /> disposed of in the adjacent yard area. <br /> Task 2 - CONCRETE FLUME REPAIR <br /> During the concrete flume repair portion of the contract, the following steps will occur: <br /> The flow of Dutch Creek will be diverted within the flume so that water is not flowing within the <br /> repair area. Accumulated rock at the entrance to the steel culvert will be removed from the <br /> flume. Holes in the base of the flume will be filled with rock materials so that voids under the <br /> flume are eliminated. <br /> Ten (10) feet lengths of number 6 (3/4 inch) rebar will be anchored and epoxied a minimum of <br /> two (2) inches into the existing concrete base of the flume within the worn area of the channel. <br /> The rebar shall be bent so that it points downstream, and shall overlap the adjoining piece of <br /> rebar by four (4) inches. The rebar shall be tied together where they overlap, and where <br /> perpendicular pieces of already in-place rebar is encountered. <br /> Concrete shall be poured within the worn portion of the flume, so that the floor of the flume is <br /> flat in the location of the worn channel. It is estimated that 16 cubic yards of concrete will be <br /> needed to affect repairs above the flume. For purposes of this bid, it is assumed that a similar <br /> volume of concrete per linear foot of channel will be needed for that portion of the flume which <br /> is currently covered by the steel culvert. Therefore, it is estimated that an additional 9 cubic <br /> yards of concrete will be needed to complete the flume repairs for the lower 180 feet of the <br /> flume. <br /> Concrete shall be 3,000 PSI, and may either be delivered or mixed on site. Concrete mixture <br /> ratios shall be delivered to the PROJECT MANAGER. The surface must be thoroughly cleaned, <br /> and a bonding agent applied prior to pouring the concrete. Due to anticipated cold weather <br /> conditions, CONTRACTOR shall supply and install insulation blankets. <br /> Task 3 -ADDITIONAL CONCRETE - CULVERT <br /> Because the actual amount of concrete which may be needed at the location of the steel culvert <br /> is not known, a price for additional concrete per cubic yard poured will be provided on the Bid <br /> Schedule. <br /> Upon completion of the project, Dutch Creek will be re-diverted into the flume. <br /> 3 <br />