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SOUTH AYCO CREEK WATERSHED <br />FOOTNOTES - EXPLANA77ON OF CERTAIN STANDARDS REQUIRED BY STATE RULES <br />a) Defining Boundaries <br />The watershed boundary extends to the ridgeline. The critical area extends one mile from the <br />normal pool elevation, or to the ridgeline of the watershed, whichever comes first. <br />The boundaries of the critical area may be extended by the local government. Major landmarks <br />such as roads or property lines may be used to delineate the boundaries if they are immediately <br />adjacent to the ridgeline or 1 -mile boundary as appropriate. <br />Local governments are responsible for delineating the normal pool elevation for reservoirs. This <br />information is used to determine the boundaries of the critical area. These boundaries must be <br />submitted by the local government using 1:24,000 USGS topographic maps. <br />b) Stormwater Controls <br />Wet water detention ponds for residential developments are permitted in the watershed to provide <br />additional stormwater control. They are not permitted within the critical area. <br />Stonmwater controls for non - residential developments are also permitted outside of the critical <br />area. Engineered controls are not limited to wet water detention ponds, but must be handled <br />on a case -by -case basis. <br />It is the responsibility of local government to assure the proper operation and maintenance of <br />engineered stormwater controls. 71te local government: <br />- must inspect the controls at least once a year; <br />- must maintain records of inspections; <br />- may charge reasonable inspection fees; and <br />- must require posting of security for maintenance <br />If the system fails to function properly, the local government must order the owning entity to <br />correct the problem, and may impose civil penalties and pursue other available remedies. <br />C) Stream Buffers <br />Stream buffers of 100' feet are required on both sides of perennial streams. It is recommended <br />(but not required) that the first 25' of the buffer remain as natural vegetation. No new <br />development is allowed in the buffer. Public projects such as road crossings and greenways may <br />be allowed where no practicable alternative exists. <br />d) Use and Stomge of Hazardous Materials <br />An inventory of all hazardous materials used and stored in the watershed must be maintained. <br />A containment plan in the event of spill of failure, and appropriate safeguards against <br />55 <br />