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Hansen Park Concept Plan <br />—•- -' -- , r - iron -Enhanced <br />v` Sand Filter with i. <br />Education Station I� <br />'t <br />New Boardwalk <br />Across island with �,. �� ;_} <br />r <br />Education Station :�`''f _ --^- <br />mm <br />Mir -- <br />�' `-ti=_ <br />fir. • , lA-" -. _•� ' - - .- - _ <br />AL <br />�� -";; .�. r_ I .� �•= � � it � _ - - <br />i? <br />,.1�i�HMM10PAAW PON❑ <br />•.� I --I <br />-wry• . : �-, , � �,�� � -- <br />��-.�,_ <br />Project Benefits <br />• Annual Total Phosphorus removal: 148-194 lbs <br />• 16.4 acre-feet removed from Long Lake flood peak window <br />• Decreased peak water elev. at 10th St NW (Polynesian Village) <br />- 1.11 feet for 10 -year event (from 873.82 to 872.71) <br />- 0.15 feet for 100 -year event (from 877.74 to 877.59) <br />• Improve access & reduce cost of future pond maintenance <br />• Substantial opportunity for education in heavily used City park <br />• Reduced frequency and/or duration of trail flooding <br />• Flood protection for adjacent homes on NW side of park <br />• Create new boardwalk/trail access across island <br />• Opportunity for City to improve or modify ballfields and trails <br />2/26/2015 <br />7 <br />