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CMP Part 3A. Environmental Protection Plan <br /> in them only intermittently, absorb a greater amount of phosphorus and have an <br /> assimilative rate of 20 lbs/acre/year. <br /> The study data was then compiled into one table listing all identified marshlands <br /> in the City for purposes of determining minimum required marsh areas necessaxy <br /> to properly detain the surface water runoff, thereby avoiding flooding and <br /> affecting nutrient assimilation. The data included in this table is outlined as <br /> follows: <br /> L Names of watersheds and code names for sub-watersheds. <br /> 2. Acreage drained to the individual marshes, with totals for the drainage <br /> areas where necessary. <br /> 3. The acreage of permanent water in the specified marshes and totals when <br /> necessary. <br /> 4. The acreage of intermittently flooded wetland and totals when necessary. <br /> 5. The pollution assimilative capacity for each specific marsh with totals <br /> when necessary. <br /> 6. The maximum residential density pollution potential for each specific <br /> drainage area with totals when necessary. <br /> 7. The percentage of the marsh needed to assimilate the projected pollution <br /> in its drainage area. � <br /> 8. The acreage, if any, with the potential for development of duck ponds, <br /> within a marsh (located in permanent standing water and computed from <br /> the water quality data). <br /> 9. The acre feet of storage available within the marsh. <br /> 10. The acre feet of storage required to prevent the flood level from rising <br /> more than 1/2 foot. <br /> 11. The percentage of each marsh needed to control flooding from a 24-hour, <br /> 100-year storm. <br /> The statistical result of this study was the realization that a natural storm water <br /> drainage and filtration system was economically practical far Orono, but that <br /> excessive urbanization would outstrip the natural capacity of most of the <br /> wetlands leading to flooding potential and to increasing levels of nutrient <br /> pollution in Lake Minnetonka. Three of the twelve study recommendations were <br /> most significant in terms of the effect on the 1980 CMP: <br /> City of Orono Community Management Plan 2008-2030 Page 3A-23 <br />