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3-9 <br />r% 100-year event. These could include earth or concrete channels <br />and overtopping of the berm or roadway itself. <br />8. The safety aspects of the detention basin should not be neglected. <br />There should not be any fences. Side slopes should be mild enough <br />so that mechanical riding mowing equipment can negotiate them and people <br />can walk up them during runoff periods. Trash racks and guard rails <br />should keep people away from the outlet structures. Good design and <br />maintenance should eliminate or reduce the problems of mosquitos, rodents <br />and snakes. <br />9. There should be an equitable sharing of the costs of detention facilities. <br />Since runoff is generated from every site in a watershed, all owners <br />should share in the cost of facilities. Equity could include a cost or <br />a credit depending on how much additional runoff is generated and how <br />1 much runoff is detained or retained on -site. <br />10. For maintenance purposes, easements or ownership of the detention basin <br />p �gaCar•r Y) <br />site and access roads, if any, ate nec6ssary. Ramps for truck access to <br />the bottom of the basins are needed as well as suitably sized concrete <br />pads for a solid footing during maintenance and sediment removal <br />activities. <br />r•. <br />f � <br />w—i� <br />