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<br />I <br />I <br />I <br />I <br />I <br /> <br />ARAPAHOE TO 17TH <br /> <br />17TH STREET TO 55TH STREET <br /> <br />Alternatives Considered <br /> <br />Alternatives Considered <br /> <br />*Relocate apartment building <br />*Lower athletic field 5 feet <br /> <br />*Raise 24th Street bridge 6 feet and extend span 53 feet to the north <br />*2 span bridge (2@55') <br />100 feet clear span bridge <br /> <br />Athletic field improvements <br />Reconstructed tennis courts <br />Low flow channel modifications to accommodate lOO cfs <br /> <br />24TH TO 28TH STREET <br /> <br />No excavat i on <br /> <br />I <br />I <br /> <br />Island mounding <br />Earth mound at Marine Street <br /> <br />*Widen and lower the existing channel to reduce the anticipated <br />100-year water surface profile and prevent diversion of flood <br />waters from the main channel area. Provide concrete chute and <br />erosion protection downstream of 24th Street. <br /> <br />*High School area <br /> <br />I <br />I <br />I <br /> <br />Relocate athletic locker and equipment storage facil ities <br />Relocate and lower vehicle/pedestrian bridge <br />Lower high school recreation field 4 feet <br />Construct below ground sill for erosion protection <br /> <br />28TH STREET <br /> <br />Remove the existing diversion structure and replace with a <br />side channel diversion upstream of 28th Street. <br /> <br />*17th Street bridge lengthening to north <br /> <br />*Remove the existing diversion structure and replace with a <br />movable diversion <br /> <br />Flood wall north bank to save apartment house <br />Enlarged channel (Plan I) to save football field <br />Increase excavation on north side to save football field <br /> <br />Extend the existing bridge 60 feet to the south <br /> <br />I <br />I <br /> <br />*Island mounding to save trees - 190 total trees - 114 saved <br />"Hike/bike path <br />*Replanting on edge of athletic field <br />*South bank untouched @ l7th Street bridge <br />*Excavation made to accommodate, improve and retain recreation <br />use <br /> <br />*Provide a concrete slope apron in conjunction with the removal <br />of the existing diversion structure to protect the existing <br />piers and abutments against erosion. <br /> <br />30TH STREET <br /> <br />IMMEDIATELY DOWNSTREAM OF 17TH STREET <br /> <br />*Raise the bridge 5 feet and extend the span 40 feet to the <br />north and 50 feet to the south <br />*3 span bridge (45'-60'-45') <br />2 span bridge (2@75') <br /> <br />I <br /> <br />"Four houses north side to be acqu i red when ava i 1 ab Ie <br />Excavation to open 17th Street bridge and allow flow to <br />existing channel <br /> <br />ARAPAHOE AVENUE <br /> <br />I <br />I <br />I <br /> <br />No construction <br /> <br />*Oenotes selected alternative <br /> <br />COLORADO AND SOUTHERN RAILROAD BRIDGE <br /> <br />*No construction <br /> <br />55TH STREET (VALLEY VIEW) <br /> <br />*No construction <br /> <br />I <br />I <br />I <br /> <br />*Oenotes selected alternative <br /> <br />47 <br />