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CnAPTER VIII FLOOD PROTECTION CRITERIA CHAPTER IX ALTERNATIVE PL&~S CO~SIDERED The agencles sponsoring this study; consisting of the To~ of Erie, Weld County, Boulder County and the Colotado Water Conservation Board, provided the criteria used to develop a flood control and floodplain management plan. The objective of the plan is to prevent or reduce potentiaL flood damages along the study reach. A. Genetal To develop a flood control and floodplain management plan, the study area waS divided into four reaches ~ith similar characteristics based on the fLood protection criteria. The reaches were selected as follows' Protection of existing habitable structures which are in the flooded areas shown on Plates I through 4 was considered of primary importance. The protection of roads and railroads from damage to embankments or drainage structures was considered secondary to protection of habitable structures. The lowest priority waS given to protection of undeveloped land. ~~HI Upstream limit of study to Perry Street REACH 2 Perry Street to Briggs Street REACH 3 Briggs Street to Kenosha Road REACH 4 ~ Kenosha Road to do~strea~ limit of study Emphasis has been placed on development of an economical and practical plan which is feosible to implement. Only i~provement5 Which would provide optimum benefits were selected for the final plan. The alternative plans which were considered for each reach are briefly described in the following .ection. Each plan has been reviewed by the TeChnical Cowmittee prior to selection of the recowmended plan. The recom- mended plan is conceptual and needs further detailed study and detailed design. Refer to Plates lZ through 15 for specific locations of olternative plan improve~nts. The basic alternative plan items are su"~rited in Table-IO and the narrative description. follow. Approximate cost estimates wete prepared for comparison of items in the screening process and review of potential benefits. - 7Z - - 73 .