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II. 8r:LFC1'ED lILT1:3l"A,', eVE Alternatives Studied There were j'ive comprehensive alternati')': plans ~,tudi'2d in .the Report on Drainage rlasteX' Plan for' \,:'est.erly Creek, Phase II" They were briefly described as follows: Alternative 1: In this alt:ex'nativc "te:,:i1 runoff would be channelized and conveyed to Sane: en""",, 1'acili ties would include: (1) the local drainage irnp.rovemE~nts if: -,.e nangeview .- South Dayton St. -. East Alameda Ave. area, 121 a .vest .to east drainage channel On the Lowry AFI3 prope::: i:y to int.ereept flows from t:he above area, (3) mi:ninu:m :l.j-,rprovement to Pond A-B, (4) an east -to VJE~st cha.nnel parall(:": to East~ i\la.~11ec'.a i,ve. to intercept flows from Pond A,.13 and convey t:h'''lTI to Lowry AFB, (5) a south to north channel traversing Lowry lIFB along the original West:erly Cree:k t:hahvc'J from Ea.s"c AlamE~da Ave. 1:0 Kelly Pond, (6;' minimum improve:::l<"rt:<:: to KeLlv Dam to reduce its hazard level, and (7) a south to ro'c:'=,h improvement (If the E~xisting l'lesterly Creek channel and :3tru,;tures f:rom ?>.elly Dam to Sand CrE'ek. Al terna'ti ve 2: In this altexna tive '3 LO:TI runoff from the upper Westerly Creek vratershed would .i.'e diveTted alon,g Uw Highline Canal into the adjacent Toll Gate Creek drainage area. The Highline Canal would be witened and deepened from ~'Jindsor Lake -to 1:011 Gate Cree-k:, a distance of a.:?proxi- mately 30,000 feet. ~'o prlovent floodinq problems due to the diversion, a s.torm water stor,].gl?:~ fa.c::.:_lity was requix'E~d in ti1e Toll Gate Creek drainage area.. We h"ld studied two opt:ional plans fo:~ Ul" lower watershed, desi'Jnated a.s Alternat:ives 2A and 2F:" A.ternative 2A combines storage facilitie!3 ,,'ith chaine::' improvement. Alternative 23 includes only channel improvemen1:. Alterna'tive 3: In this alternative 3tonl runoff would be con- t:ainl)d and conveyed by mean", of sl:orage facilities and channeL..- zation. Facilities would include: ~ 1) '::he local drainage improvements in the Rangeview - Sout.:l Dayton St.. -. East Alameda area, (2) a st:ormwater storaqe facil:~ty C'lississippi- Dayton Detention Pond), (3) minimum irIJCrO"!ements to Pond A,-B (4) an east to west channel paraLleJ to ::cast Alameda AVE', to i I1tercept, flo\<lS from Pond A-e and 0, purtion of drainaCJe area south of Alameda Ave., and COn'\l'''Y them into Lowry AFI3, (5) a storm wat,er storage faci.lity (Upp(~r LOI'lry De-' t:enti.on Pond) for flows intercepted :)y t:le east to "ICSt chan:l1el, (6) i.mprovenents .to Kelly P':):nd and Dam t.o maximize storaCJe within site limitations and I:c' reduce the ha.zard level of the dam, (6) a south to norl:'~ '.,nprovement of the existing Westerly Creek channel and structures from Kelly -2..-