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<br />passage may be possible directly along the riverbanks. <br />All three alternatives require some maintenance for debris removal. Alternatives II and III <br />require additional maintenance for the replacement and upkeep of boulder drop-pools. <br />Easements across private property are required for all three alternatives for the <br />placement of the structures, for construction and for maintenance. <br />Supporting design and cost analyses are presented in the report. A short summary of <br />the alternatives is presented in Table E.1. <br />TABLE E.1 SUMMARY OF ALTERNATIVES <br /> <br />Feature Alternative I Alternative II Alternative III <br />Type Concrete with option of Open channel with rock Fish and boat passage <br />roughened bottom baffles, pools & riffles with chutes and pools <br /> Ladder available for all Ladder available for all Center of river for low flow <br />Fish Passage flows flows conditions, banks of river <br /> for flood events <br />Access East side, easements East l)ide, easements East side, easements <br />reQuired reQuired reQuired <br />Property issues Easements required for Easements required for Easements required for <br />ladder and access ladder and access ladder and access <br />Maintenance Trash and debris Trash and debris, rock Trash and debris, boulder <br />replacement replacement <br />Costs $493,700 $353,000 $2,011,000 <br />Maintenance Costs: yearly $2,000 $4,000 $6,500 <br />Present value, 8%, 50-yr, <br />3 % inflation) $37,000 $75,000 $121,000 <br />Construction cost & $530,700 $428,000 $2,132,000 <br />maintenance (pres.value) <br />Disadvantages Not available for boat Not available for boater Five times the costof <br /> passage passage Alternative II <br /> Least natural appearance Rock baffles require Rock chutes require <br /> maintenance to insure maintenance to insure <br /> , proper placement proper placement <br /> May disturb existing <br /> wetlands <br /> Safety and social issues <br /> with increased public use <br />Advantages Cost within 20% of Least expensive Available for boat passage <br /> Alternative II <br /> Easy to maintain Most natural appearance <br /> Could be converted for Could be converted for <br /> selective passage selective passage <br /> <br />I <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />1 <br /> <br />I <br />1 <br /> <br />I <br /> <br /> <br />The Hartland Irrigation Company reports a long history of fish capture in the ditch. Thus, I. <br /> <br /> <br />W I <br />I <br />