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6 <br />WATER SUPPLY WATERSHED RULES - FEBRUARY 13, 1992 <br />COMPARISON OF WS -II AND WS -III CLASSIFICATIONS <br />STANDARDS COMMON TO BOTH CLASSES <br />Critical area of 1/2 -mile around reservoirs /water sources. <br />Non - residential development limited to 5% of total watershed (70% <br />impervious surfaces in this area). <br />Clustering is allowed in all areas. <br />Sewer lines are allowed in all areas. <br />No new landfills allowed in critical areas. No new discharging <br />landfills in remainder of watershed. <br />CLASS WS -II <br />Two -acre lots within critical areas. Maximum of 6% impervious <br />surfaces without stormwater controls of 1" storm. <br />One -acre lots in remainder of watershed. Maximum of 12% impervious <br />surfaces without stormwater controls of 1" storm. <br />CLASS WS -III <br />One -acre lots within critical area. Maximum of 1.2% impervious <br />surfaces without stormwater controls of 1" storm. <br />One -half acre lots in remainder of watershed. Maximum of 24% <br />impervious surfaces without stormwater controls of 1" storm. <br />OP <br />