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. The Study Team will accomplish this ,step by fanaw~rig the guidance in Chapter Eight of the' Carps 1996 Planning Manual (lWR Repart96-R-21)~ and Page 152 afAppendix E in ER 1105-2- 100.<- The end product afthisstep shall be a draft written. repart quality. description af alternatives for review and .comment by the stakeholder!:!. This planning step wauld be, accemplished in a 6-month time period. Stakehalder camments will be addressed as the' , alternative descriptians'arecanverted intO' the Draft Feasibility Repart/Enviranmentid Impact State'ment. . . , . -. . Ste'p 4 -Evaluation ofAJternativ~ Plans, .. ' . '. For this step,theC.arpSlSpcmsar StudyTeam will.canductan evaluation ofthealtemativeplans, . The evaluation will can~t af four' general tasks: (l) forecast the mast likely with-praiect .... '. cenditions expected uildereachaltemative: (2) cain pare each with-praiect conditians to' the witheut-prajeCt conditians and dacument differences between the two: (3) characterize the . . beneficialatid adverse effects bymagnitude.locatian. timing.andduratian: and (4)qualify plans for further consideratian.. . . At a rriinimum,twocategories afeffects are to' be evaluated: casts and outputs. Environmental autputs are the desired oranticipatedmeasurabl.e products or resultsaf restaration measuresand . plans: The'tenn "eutputs".is often used interchangeably with "benefits." Ecasystem'restoratian prapesals may pessess multiple output categories,.as well as ather effects that may need to' be . considered, but the evaluation' must at leastaddresscest and an eutput categOry that has .been determined to' reasonably repreSent ecasystem restaration benefits. '. " Costeffe~tiveriess and incremental cost analyses (CElICA) are twO' distinct analysesthat wilf be conducted to evaluate the effects af alternative plans. First it must be shown through cost effectiveness analysis that an alternative restoratian plan'sautput cannet be praduce<J"more cast effectively by an ether alternative. "Cast effective" means that, for. a.given level afnan-manetary - . output, no ather plan CCiS!S less, and nO' otherplan yields mare eutput for less maney. . . . . . Subsequently, through incremental cost analysis. a variety of implementable alternatives and . varieus-sized alternatives are to' be evaluated to arrive ata "best" level of output within the limits efboth th.e sponser's and the Carps' capabilities. The subset af cast effective plans are examined sequentially (by increasing scale and incremeiltaf output) to' ascertain which plans are mast. . efficient in the: prociuction of environmental benefits. Those mestefficientplans ~re to' be called "Best Buys". They provide the greatest increase in autput for the least increases in cast. They have the lewest incremental costs per un it of autput. In mast analyses, there will be a series af Best Buy plans, in which.the relatianship between the quantity of autputs and the unit cest is evident. As the scaleafBest Buy plans increaSes (intenns Qfautputproduced), average cests per . unitef eutput and i~creIllental cests per unit ef eutput will increase ,as wen. Usually, the . incremental analysis by itself will riot paint to' theselectien efany single plan. The results of the incremental analysis must be synthesized with ether decisien~making criteria (for example;' significance of outputs, acceptabitjty, campleteness, effectiveness, risk and uncertainty, '. reasenableness af casts) to hetpthe planning team select and recemmend a particular plan. . . c. .. . . . The Carps' Institute fer Water Resources (IWR) has develeped pracedures andseftware to assist in cenducting CElICA. An IWRsoftware package will be used to' assist in perfonning CE/ICA: ... the Windows-based IWR-PLAN Decisien Support Software. This IWR-PLAN saftware package is available from the IWR web site at <http://www.wrsc.usace.anny.mil/iwr>. 6