BIL 052 Draft 01 2006-2008 - Laserfiche WebLink

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Mt'~,OS M ~L~ COUNTY OF HAWAII STATE OF HAWAII ...'t ~.M'+' ~Ji, BILL NO. 5z ORDINANCE NO. AN ORDINANCE AMENDING CHAPTERS 23 (SUBDNISION CONTROL CODE), 25 (ZONING CODE) AND 27 (FLOOD CONTROL CODE), HAWAII COUNTY CODE 1983 (2005 EDITION, AS AMENDED), RELATING TO STORMWATER MANAGEMENT BE IT ORDAINED BY THE COUNCIL OF THE COUNTY OF HAWAII: SECTION 1. Purpose. The purpose of this ordinance is to require new development to manage storm water runoff to reduce the potential that it will cause water pollution. The ordinance is intended to comply with Section 6217 of the Coastal Zone Act Reauthorization Amendments of 1990. The ordinance requires that new subdivisions, and new buildings which need plan approval, discharge their storm water, up to a specified limit, into drywells or infiltration basins, or use other methods that will filter out suspended solids from storm water. These requirements will be enforced at the time of subdivision approval for new subdivisions, and at plan approval for new buildings. SECTION 2. Chapter 23, article 6, section 23-92, Hawaii County Code 1983 (2005 Edition, as amended), is amended to read as follows: "Sec. 23-92. j Sand. .a . ~ o...;,.i w.. .w.. a:_e,..,.« ,.r....wi:,. ...,.a... „ ~ DrainaEe, flood, and erosion mitigation measures. ~ The subdivider shall construct a storm water disposal system to contain run-off caused by the subdivision improvements within the boundaries of the subdivision up to the expected one-hour, ten year storm event, as shown in Plate 1 of the Department of Public Works "Storm Drainage Standards", dated October 1970, or any approved revisions, unless those standards specify a greater recurrence interval, in which case, the greater interval shall be used. The amount of expected runoff shall be calculated accordin tg o the Department of Public Works "Storm Drainage Standards", dated October