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Drainage Proposals & Amended Drainage Plans

Visit our Borough Water and Sewer Offices to obtain water and sewer records and for general assistance with water and sewer permitting and approvals. For other forms, go to Water and Sewer Forms.

Local Law 96 amends the New York City Administrative Code to establish the North American Vertical Datum of 1988 (NAVD 88) as the city datum. In response to the issuance of Local Law 96 and questions from applicants and consultants, DEP issued the following directive to clarify issues regarding the vertical datum with regards to submissions and construction drawings requiring DEP’s review and approval.

Amended Drainage Plans

An existing City Drainage Plan may require an amendment if significant changes are proposed to be made to an area (mapping or de-mapping of streets, rezoning, and/or re-routing of sewers). The checklist must be signed and sealed by the applicant and submitted with the Amended Drainage Plan. All Amended Drainage Plans must be prepared by or under the supervision of a Professional Engineer or Registered Architect licensed by the State of New York.

This template must be used by a Professional Engineer or Registered Architect when submitting Amended Drainage Plans to DEP. The template is provided in AutoCAD format. The standard paper size for Drainage Plans is “Arch-D” and the standard font is “Sans Serif.“ If the Amended Drainage Plan has more than one page, the additional pages must include the title block, north arrow, scale and date prepared.

These worksheets must be used by a Professional Engineer or Registered Architect to develop the hydraulic design computations for an Amended Drainage Plan submission. Separate worksheets are provided for sanitary, stormwater, and combined computations.