1600 121ST ST SE 2016-01-01 MF Import

If the berm is ar.cessible to foot traffic, an� the pond will not be fence��, L-he maximum side slope of the berm should be 3:1. Maintenanoe A:aesa Requiremente: Appropriate access must be provided to all drainage facilities to allow for maintenance of these facilftiea, particularly for mairtenance and renr�ir of control structures and for removal of accumulated sediment from surface ponds and basins. An access road is required to all control atructures, grit/aedim�nt removal structures or surface pond e.reae, and oil/water separators not accessible from surfaces paved for vehicle use. The following criteria apply for access roads: 1) Access roads shall be a min<_mum of 15 feet in width and have a maximum gra-if: of 6H:1V. 2) Fence gates shal' h� provided for access roads at "straight" sections of the road. 3) A 40 foot minimum outside radius must be provided on access roads to control structures. 4) The surfac.ing of access roads must be an all-weather s�irface of crushed rock or better. 5) Where possi.ble, manhole and catch basin lids to be accessed sh,911 be on the right hand side of the vehicle acc.essinq the structure. 6) Surface ponds or basins greater than 30 °ec+t wide shall be designed and constructed with an access road to that area of the pond or basin bottom where sed+'.ment would accumulate. 7) Surface pond� or basins 15 f.eet wide or les�. shali bc desiqned ar�� constructed with an ac�ess road along one side of the pond, open water cell, or basin. B) Surface ponds or hasins between 15 and 30 feet wide, shall be designed and constructed with an access rcad along both sides of the pon� nr basin or to the area of the pond or basin bottom where sediment would accumulate.