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A~N ORDINA~NCE TO A~END THE CODE OF THE CITY OF PORTSMOUTH, VIRGINIA, 1973, BY AM~I~DING SECTIC~ 33-56 THEREOF, PER~AIAriNG TO OFF-SITE DPJ~INAGE. BE IT ORDAINED by the Council of the City of Portsmouth, Virginia: 1. That the Code of the City of Portsmouth, Virginia, be amended and reord~ined to read as follows: Section 33-56. Off-Site Drainage. I. New Development. t. Building. p~rmit will be issued by the Building Official for proposed construction of new development only after the City Engineer has dete3a/kined that the additional off-site drainage flow frc~ such proposed construction will rat be a danger or hazard to an existing off- site drainage facility or property in the proposed construction's drainage basin. (Off-site drainage facilities are those facilities outside the property limits of proposed construction necessary to carry drainage flow frc~ such construction to a drainage basin). New open ditches or modification of existing ditches will not be permitted in areas zoned residential unless included in the City's master drainage plan. 2. The City Engineer will determine v~ether a hazard or danger exists frc~ such additional off-site drainage flow by approved drainage computations furnished to the City Engineer by the permit applicant in accordance with the City's Master Drainage Plan, existing field conditions, and zoning required by City Council. Cu~utations shall be based on a nonm%l storm return period of five (5) years using U. S. Department of ~ce ~ and utilizing applicab~e existing Master Drainage Plans on file in the Office of the City Engineer, or as adjusted by the City. 3. After the City Engineer deternfunes no hazard or danger results frc~a additional off-site drainage flow, the Building Official will issue a building permit if other required legal mandates are met. 4. When the City Engineer determines that a hazard or danger results frc~ additional off-site drainage flow, and all other legal mandates are met, the building permit will be issued only after: (a) A plan is submitted by the permit applicant to provide the off-site drainage and is approved by the City Engineer and the permit applicant agrees to construct such approved off-site drainage pursuant to the procedures set out in §33-55 of this Code.