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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />===================================================================================== <br /> <br />AL TERNATIVE <br /> <br />ESTIr~ATED COST <br />INCLUDING <br />25% CONTINGENCY <br /> <br />DESCR I PTI ON <br /> <br />===================================================================================== <br /> <br />3 Embankment Dam <br /> <br />- Remove riprap from emergency spillway <br />- Backfill emergency spillway to dam crest elevation <br />- Repair/reinforce riprap on upstream face of dam <br />- Raise crest of dam, if necessary, to provide one <br />foot of freeboard (1.0 foot maximum), regrade and <br />slope to drain <br />- Extend toe drain up abutments <br />- Reconstruct Chambers Lake inlet dike <br /> <br />Outlet Works <br /> <br />- Replace outlet works <br /> <br />Spi 11 ways <br /> <br />- Remove existing service and auxiliary spillways <br />- Construct service spillway ogee of conventional <br />concrete <br />- Construct concrete grade beam one foot above <br />service spillway elevation <br />- Construct riprap-lined dike around grade beam <br />- Riprap line exit channel downstream of the spillways <br /> <br />$ 1,035,000 <br /> <br />===================================================================================== <br /> <br />The City, .together .with MKE,_sel~c.te_d Alternative No_. 2, in parallel with part <br />_o~ ..the auxni.ary_spillway solution .of ~1ternative ~o~ 3. The rehabilitation <br />solution would include: remove riprap from emergency spillway and replace on <br />upstream face of dam and/or auxiliary spillway; backfill emergency spillway to <br />level with the crest of the dam; raise crest of dam if necesssary and regrade <br />to drain; reconstruct Chambers Lake inlet dike; rel ine outlet works conduit; <br />remove existing service and auxiliary spillways; construct RCC service <br />spillway or ogee servi ce spill way of conventi onal concrete; construct <br />auxiliary spillway as a riprap-protected overflow dike with a concrete grade <br />beam along the centerline. <br /> <br />E-9 <br /> <br />1151c <br />