(a) All storm drainage facilities shall be adequately designed for the anticipated runoff when the area is fully developed, using criteria or other methods approved by the Borough Engineer and in conformity with Act 167 requirements (Storm Water Management).
(b) A complete drainage plan of the subdivision shall be submitted, including all necessary storm sewers and facilities, the design of which is based on a ten-year storm frequency, except in those areas where, in the judgment of the Borough Engineer or Council, additional design criteria are required. The drainage plan shall show the method of disposal of all storm water collected. The drainage plan shall be accompanied by design calculations.
(c) The storm drainage system shall be provided, as necessary, to:
(1) Discharge storm water into natural watercourses.
(2) Adequately drain all low points along streets.
(3) Intercept street storm water runoff at intervals related to the streets and grade of the area drained.
(4) Provide positive drainage away from sewage facilities.
(5) Handle existing off-site runoff through the subdivisions.
(6) Insure safe and proper disposal of storm water where open watercourses are planned, through adequate safety and erosion measures.
Storm water management plans shall address all State, County and local standards.
(d) Storm sewers shall be located in the street right of way or in designated drainage easements.
(e) All pipe culverts and related installations used in the construction of storm sewers shall be in accordance with standards and specifications of the Borough, County or State, as designated and approved by the Council and the Borough Engineer.
(f) Manholes and castings of the type shown on the Borough Construction Standards shall be installed at all changes in alignment and grades to facilitate the proper maintenance. Inlets may be substituted for manholes where practical.
(g) All roof drains shall be extended to the curb of the streets and connected to the storm sewer system where accessible. At no time will roof drains or foundation drains be permitted to be connected to the sanitary sewer system.
(h) Any springs encountered during construction shall be piped and connected to the storm sewer system or extended to a natural watercourse as may be approved by the Borough Engineer.
(i) Concrete headwalls and splash aprons of a type approved by the Borough Engineer shall be constructed at both ends of the pipe.
(j) Whenever construction stops or concentrates the natural flow of surface drainage in such a way as to affect adjoining properties, written approval must be obtained from the affected adjoining property owners. Where storm drainage is piped onto adjoining properties other than natural watercourses, written permission, a release of damages and right of way must be obtained from the adjoining property owners prior to the acceptance of the storm sewers by the Council. Approval of the plans of the Borough does not authorize or sanction drainage affecting adjoining properties.
(Ord. 2143. Passed 8-16-93.)