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. . . Table 7 ALTERNATIVE SELECTION MATRIX Note: Alternative No. 1- No Action Not Ranked .... ....... FACTOR! .. FACfOR2 ". . FACTOR 3 . .. FACTOR4 . FAmOR 5 ..' FACTOR 6 c FACTOR 7 FACTORS .... TOTALS Does the project Does the project Does the project Does this alternative Ranking elf project Ranking of project Is there sufficient Miscellaneous provide immediate provide immediate provide immediate have Community with respect to ease of with respect to funding available to Impacts an~ flood control benefits flood control benefits flood control benefits support? environm~ntal estimated cost (most complete the Unknownsj Alternative No. to the City of 10 fannland adjacent to the Town of Town pennitting and costly ranked last). alternative? Total Points = Sterling? to Pawnee Creek? of Atwood? implementation. I DESCRIPTION Alternative rank Weight Factor 15 Weight Factor 10 Weight Factor 10 Weight Factor 15 Weight F..,tor 10 Weight Factor 15 Weight Factor 15 Weight Fa~or 10 ; Yes, Pawnee Creek Yes, for area North of No. Potential for No. Potential for Channelizlltion of Cost Est. $1,389,091. Yes. Possible ~ater Alternative No.2 overflow contained. Pawnee Creek Bridge negative impact. greater damage dOwns~ area may (Does not include damage ftoln floods Total Points =415 and East of CR. 33 during floods greater require m. igation. COOT bridge cost) in excess o~ OO-year PAWNEE than IOO-year in at Town of twood Alternative rank 2 Rank 6 Town of Atwood I I CREEK Rank 6 Rank I Rank I Rank 5 Rank 6 Rank I LEVEES Points 60 Rank 6 Points 10 I Points 90 Points 10 Points 15 Points 50 Points 90 I Yes, but localized Yes, but localized Yes, but localized No High cost makes it Each dam site will Cost Est. No. Possible n~ for Alternative No.3 flooding downstream flooding downstream flooding downstream essentially do nothing require an ~dividual $27,365,885. unproveme~ts to Total Points =250 of lowest reservoir of lowest reservoir of lowest reservoir alternative 404 Penn it handle loca~ stonns UPSTREAM still possible. still possible. still possible. I Alternative rank 5 RESERVOIRS Rank 5 Rank 5 Rank 5 Rank I Rank 2 Rank I Rank I Rank I Points 10 Points 75 Points 50 Points 50 Points 15 Points 20 Points 15 I Points 15 Yes. No. No. Yes for Sterling but Potential mitigation at Cost Est. $2,627,631. Yes. Subject to iricreased Alternative No.4 does not help Logan new northern channel flow due 10 future Total Points =370 County confluence with changes in nuiroad South Platte. height. I Alternative rank 4 RIVERSIDE I, ,,; CEMETERY Rank 6 Rank I Rank 1 Rank 2 Rank 5 Rank 4 Rank 6 BERMSI Points 90 Points 10 Points 10 Points 50 Points 60 Points 90 Rank 3 CHANNEL Points 30 Points 30 Alternative No.5 Yes. Yes, but for minor Yes, but for minor Yes. Potential mitigation at Cost Est. $2,097,990. Yes. Provides gre&test floods only. floods only. new northern channel flexibility. Takes Total Points =555 COMBINED confluence with advantage of Pawnee South Platte. Creek bridge capacity Alternative rank I NO 2 AND at HWY 6. N04 Rank 6 Rank 5 Rank 5 Rank 6 Rank 5 Rank 5 Rank 6 I Points 90 Points 50 Points 50 Points 90 Points 50 Points 75 Rank 6 Points 60 I Points 90 I i Alternative No.6 Yes, but local Yes but local flooding Yes. No, local fanners Potential mitigation al Cost Est. $x,xxx,xxx. Yes. May cause flooding may occur may occur object to land loss. confluence with overtopping of South Total Points =410 TOWN OF downstream of downstream of South Platte. Platte River knd , Alternative rank 3 improvements. improvements. introduces dJrainage to ATWOOD areas not :us UPSTREAM - subject to ing. CHANNEL Rank 5 Rank 5 Rank 6 Rank 3 Rank 5 Rank 2 Rank 6 Rank 1 I Points 75 Points 50 Points 60 Points 45 Points 50 Points 30 Points 90 Points 10 III-I 6 I , I I ~-