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BMP C220: Storm Drain Inlet Protection <br /> Purpose <br /> Storm drain inlet protection prevents coarse sediment from entering drainage systems <br /> prior to permanent stabilization of the disturbed area. <br /> Conditions of Use <br /> Use storm drain inlet protection at inlets that are operational before permanent sta- <br /> bilization of the disturbed drainage area. Provide protection for all storm drain inlets <br /> downslope and within 500 feet of a disturbed or construction area, unless conveying run- <br /> off entering catch basins to a sediment pond or trap. <br /> Also consider inlet protection for lawn and yard drains on new home construction. These <br /> small and numerous drains coupled with lack of gutters in new home construction can <br /> add significant amounts of sediment into the roof drain system. If possible delay <br /> installing lawn and yard drains until just before landscaping or cap these drains to pre- <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume 11- Chapter 4 -Page 357 <br />