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<br />5.0 DESIGN OF OTHER FEATURES <br /> <br />5.1 SPILL WAY OUTLET CHANNEL <br /> <br />Hydraulic jump nor plungle pool energy dissipation is considered not to be necessary at <br />the dam. The dam has a height of about 30 feet and discharge velocities are less than 18 <br />feet per second. Although such velocities will cause erosion, riprap and native stone in <br />the outlet channel will guard against detrimental erosion. <br /> <br />5.2 STREAM CHANNEL ADJACENT TO SPILL WAY <br /> <br />The natural stream channel located above and across the road from the spillway is to be <br />lined with an impervious material to prevent saturation of the foundation. Preventing <br />water in the channel from reaching the west wall of the spillway inlet is extremely <br />important. In addition, precast Jersey barriers are provided between the ditch and road to <br />prevent stream overbank flow from reaching the spillway. Protection of the stream <br />requires improvement along the channel for a distance of about 200 feet. <br /> <br />6.0 CONSTRUCTION CONSIDERATIONS <br /> <br />6.1 GENERAL <br /> <br />Construction considerations are provided to document the designer's assumptions and <br />intents, and to highlight particular aspects of the construction that require special <br />attention. <br /> <br />6.2 CONSTRUCTION SCHEDULE <br /> <br />A reasonable construction schedule should consider items: <br /> <br />I) The runoff potential and reservoir content before removal of concrete. This <br />consideration will detennine when construction begins, preferably after the high <br />spring runoff. <br />2) Line natural stream channel prior to concrete removal so that slope stability and <br />dewatering of the foundation will not be a concern. <br />3) Pull out tests for anchors should be undertaken prior to construction so that <br />adjustment of anchor design can be considered if needed. <br />4) Anchor 3-1'oot wide strip of floor slab prior to removing floor slab. <br />5) Remove and replace concrete in inlet structure so that foundation is exposed for <br />as short a time as is reasonable. <br /> <br />6 <br />