§ 23-02 Requirements for the Submission of Drainage Proposals for the Construction of Private Drains and Additional Requirements for Drainage Proposals and Private Drain Plans.

   (a)   Drainage proposals; when required. Owners proposing to construct a private drain to serve a proposed development shall submit a drainage proposal to the department.

   (b)   General requirements for the submission of drainage proposals. All drainage proposals shall be prepared by or under the supervision of a professional engineer or registered architect licensed by the State of New York and shall be accompanied by the following information and documentation:

      (1)   the source, quantity, method of conveyance, and outlet for all stormwater runoff;

      (2)   the source, quantity, method of conveyance, and outlet for all sanitary flow;

      (3)   a description of the proposed development to be served by the proposed private drain including a description of the type of all buildings to be constructed or maintained on the proposed development;

      (4)   a description of the route(s) of the proposed private drains;

      (5)   all engineering computations performed in accordance with this rule and the department's most recent drainage design criteria;

      (6)   a letter from the office of the borough president of the county in which the proposed development is located verifying the legal status of all streets involved in the proposed development;

      (7)   a survey of the proposed development and the location and route(s) of the private drain(s) prepared or updated no more than one year prior to the date of submission of the drainage proposal by a professional land surveyor licensed by the State of New York and prepared in accordance with the requirements of Appendix A-6;

      (8)   as-built drawings for the existing outlet for the proposed private sewers or private drains. If as-built drawings are not available, then a sewer route survey showing the sewer or drain size, type, material, and invert/rim elevations at the manholes shall be submitted;

      (9)   boring logs prepared in compliance with Appendix A-8;

      (10)   a copy of the latest tax map of the proposed development as certified by the city surveyor;

      (11)   a copy of the portion of the city map and, if applicable, the alteration map, showing all streets shown on the drainage proposal;

      (12)   a copy of the builder's pavement plan as filed with the city;

      (13)   a copy of all applicable permits and approvals required by other federal, state, or local laws and regulations including the city's Uniform Land Use Review Procedure (ULURP);

      (14)   all applicable legal documentation required by this section and 15 RCNY § 23-03(c);

      (15)   paper prints prepared in accordance with the requirements of Appendix A-2; and

      (16)   the Department's review fee for drainage proposals in accordance with 15 RCNY § 23-08;

   (c)   Additional requirements for the submission of drainage proposals and private drain plans involving special conditions. In addition to the requirements of subdivision (b) of this section, owners submitting drainage proposals and private drain plans incorporating any of the following special conditions shall be required to file the additional information and documentation as specified below. Such documentation shall conform to the applicable requirements of 15 RCNY § 23-03.

      (1)   Use of proposed private sewage treatment plants or proposed private pumping stations in residential districts serving 50 or more dwelling units. Drainage proposals and private drain plans in residential districts where proposed private sanitary drains will discharge into a proposed private sewage treatment plant or a proposed private pumping station which is not owned and operated by the department and serves 50 or more dwelling units shall include the following additional information and documentation:

         (i)   proof of approval by the Department of City Planning;

         (ii)   proof of conceptual approval by the Department of Buildings with appropriate conditions and safeguards as prescribed by the Department of City Planning;

         (iii)   approval from the New York City Department of Health specifying the following for each private sewage treatment plant or private pumping station:

            (A)   the total number of dwelling units approved;

            (B)   the number of dwelling units committed with the drainage proposal;

            (C)   the number of dwelling units committed to other developments; and

            (D)   the remaining number of uncommitted dwelling units;

         (iv)   a copy of the initial franchise application as filed with the city for the installation and maintenance of a Private sanitary force main within a finally mapped street where the city has title or an opinion of dedication; and

         (v)   a properly recorded restrictive declaration executed by the owner creating a homeowners' or condominium association to own, maintain, and operate the private sewage treatment plant or private pumping station.

         (vi)   a properly recorded declaration of maintenance obligating the owner and all successors-in-interest to maintain the private sewage treatment plant or private pumping station and all appurtenances thereto;

         (vii)   security in an amount determined by the department in accordance with 15 RCNY § 23-04 shall be deposited with the comptroller's office guaranteeing the continuous and proper maintenance of the private sewage treatment plant or private pumping station for as long as such sewage treatment plant or pumping station remains in use; and

         (viii)   the owner's liability insurance in an amount determined by the department in accordance with 15 RCNY § 23-04 certified by the owner's liability insurance company.

      (2)   Use of existing private sewage treatment plants or existing private pumping stations. Drainage proposals and private drain plans incorporating the use of an existing private sewage treatment plant or an existing private pumping station which is not owned and operated by the department shall include the following additional information and documentation:

         (i)   a properly recorded consent executed by the owner of the existing private sewage treatment plant or private pumping station granting the owner the right to connect to the existing private sewage treatment plant or private pumping station;

         (ii)   approval from Department of Health specifying the following for each private sewage treatment plant or private pumping station:

            (A)   the total number of dwelling units;

            (B)   the number of committed dwelling units previously connected;

            (C)   the number of committed dwelling units not yet connected;

            (D)   the number of dwelling units committed with the drainage proposal; and

            (E)   the remaining number of uncommitted dwelling units.

      (3)   Use of private on-site detention basins. Drainage proposals and private drain plans incorporating the use of private on-site detention basins to accommodate both on-site and off-site stormwater runoff shall include the following additional information and documentation:

         (i)   the delineation of the private on-site detention basin on a separate tax Lot with appropriate provisions that the department determines are necessary for adequate access to the basin and to the piping entering and exiting the basin for maintenance purposes;

         (ii)   all hydraulic computations related to the design of the private on-site detention basin conforming to the department's most recent private on-site detention basin design criteria;

         (iii)   a properly recorded declaration of maintenance obligating the owner and all successors-in-interest to maintain the private on-site detention basin and all appurtenances thereto;

         (iv)   security in an amount determined by the department in accordance with 15 RCNY § 23-04 shall be deposited with the comptroller's office guaranteeing the continuous and proper maintenance of the private on-site detention basin for as long as such detention basin remains in use; and

         (v)   the owner's liability insurance in an amount determined by the department in accordance with 15 RCNY § 23-04 certified by the owner's liability insurance company.

      (4)   Watercourse diversions. Drainage proposals and private drain plans incorporating watercourse diversions which function as the outlet for the stormwater runoff from the upstream contributory drainage area shall include the following additional information and documentation:

         (i)   a properly recorded declaration of sewer easement establishing and delineating a sewer easement in favor of the department;

         (ii)   a properly recorded declaration of maintenance obligating the owner and all successors-in-interest to maintain the watercourse diversion and all appurtenances thereto;

         (iii)   a security deposit in an amount determined by the department in accordance with 15 RCNY § 23-04 shall be deposited with the comptroller's office guaranteeing the continuous and proper maintenance of the proposed watercourse diversion for as long as such watercourse diversion remains in use; and

         (iv)   all hydraulic computations relative to the design of the watercourse diversion or piping.

      (5)   City map changes. Drainage proposals and private sewer or private drain plans incorporating a change or proposed change to the city map shall include the following additional information and documentation:

         (i)   an alteration map as prepared in conjunction with the application to the Department of City Planning for a mapping action; and

         (ii)   an amendment to the city drainage plan which shall reflect the new street pattern created by the mapping action.

§ 23-03 Legal Requirements for Private Sewers or Private Drains.

   (a)   General requirements for all legal instruments. All legal instruments required by this rule including, but not limited to, affidavits, consents, declarations, agreements, real estate instruments, sureties, bonds, indemnities, and security deposits shall be submitted on the appropriate forms supplied by the department, shall contain original signatures, and shall be properly recorded in the office of the clerk of the county in which the proposed development is located to the extent that recording is required.

   (b)   General requirements for title reports and title insurance policies. All title reports and title insurance policies required by this rule shall be prepared and written by a title insurance company licensed to do business in the State of New York. All title insurance policies shall name the city as the insured and shall contain a technical description of the metes and bounds of the proposed development and the bed of street areas for which the city has no title or opinion of dedication for public use from the corporation counsel.

   (c)   Additional legal documentation requirements for drainage proposals or private sewer plans relating to the status of streets. In addition to the requirements of 15 RCNY § 23-02, owners submitting drainage proposals or private sewer plans relating to the status of streets shall file the additional information and legal documentation as specified below.

      (1)   Owners proposing to construct a private sewer or private drain in a city-owned street shall also submit a letter from the office of the appropriate borough president verifying that title to the street in which a private sewer or private drain is to be constructed has vested in the city.

      (2)   Owners proposing to construct a private sewer or private drain in a finally mapped street owned by the owner shall also submit the following:

         (i)   a title report verifying the owner's ownership of the subject street(s);

         (ii)   a title insurance policy in an amount determined by the department in accordance with 15 RCNY § 23-04 insuring the city of the owner's right to construct the proposed private sewer or private drain as delineated on the drainage proposal or private sewer or private drain plan; and

         (iii)   a properly recorded declaration of public use-irrevocable street opening irrevocably opening the street(s) for public use.

      (3)   Owners proposing to construct a private sewer or private drain in finally mapped or record street(s) owned by others shall also submit the following:

         (i)   a title report verifying the ownership of the subject streets;

         (ii)   a title insurance policy in an amount determined by the department in accordance with 15 RCNY § 23-04 insuring the city of the owner's right to construct the proposed private sewer or private drain as delineated on the drainage proposal or private sewer or private drain plan;

         (iii)   either:

            (A)   a properly recorded sewer easement agreement establishing and delineating a sewer easement in favor of the owner; or

            (B)   a properly recorded declaration of public use-irrevocable street opening irrevocably opening the street(s) for public use;

         (iv)   a properly recorded declaration of maintenance obligating the owner and all successors-in-interest to maintain the private sewer or private drain if the street is not to be continuously opened for public use; and

         (v)   a security deposit in an amount determined by the department in accordance with 15 RCNY § 23-04 if the street is not to be continuously opened for public use.

      (4)   Owners proposing to construct a private sewer or private drain in finally mapped or record street(s) of unknown ownership shall also submit the following:

         (i)   a title report verifying that the finally mapped or subject streets are of unknown ownership;

         (ii)   a title insurance policy in an amount determined by the department in accordance with 15 RCNY § 23-04 insuring the city of the owner's right to construct the proposed private sewer or private drain as delineated on the drainage proposal or private sewer or private drain plan;

         (iii)   a properly recorded declaration of maintenance obligating the owner and all successors-in-interest to maintain the private sewer or private drain if the street is not to be continuously opened for public use; and

         (iv)   a security deposit in an amount determined by the department in accordance with 15 RCNY § 23-04 if the street is not to be continuously opened for public use.

      (5)   Owners proposing to construct a private sewer or private drain part of which will traverse the owner's property shall also submit the following:

         (i)   a title report verifying the ownership of the subject property;

         (ii)   a title insurance policy in an amount determined by the department in accordance with 15 RCNY § 23-04 insuring the city of the owner's right to construct the proposed private sewer or private drain as delineated on the drainage proposal or private sewer or private drain plan;

         (iii)   a properly recorded declaration of sewer easement establishing and delineating a sewer easement in favor of the department;

         (iv)   a properly recorded declaration of maintenance obligating the owner and all successors-in-interest to maintain the private sewer or private drain and all appurtenances thereto; and

         (v)   a security deposit in an amount determined by the department in accordance with 15 RCNY § 23-04 guaranteeing the continuous and proper maintenance of the proposed private sewer or private drain for as long as such private sewer or private drain remains in use.

      (6)   Owners proposing to construct a private sewer or private drain part of which will traverse property of another shall also submit the following:

         (i)   a title report verifying the ownership of the subject property and/or street(s);

         (ii)   a title insurance policy in an amount determined by the department in accordance with 15 RCNY § 23-04 insuring the city of the owner's right to construct the proposed private sewer or private drain as delineated on the drainage proposal or private sewer or private drain plan;

         (iii)   a properly recorded sewer easement agreement granting the owner the right to construct the proposed private sewer or private drain;

         (iv)   a properly recorded declaration of maintenance obligating the owner and successors-in-interest to maintain the private sewer or private drain and all appurtenances thereto; and

         (v)   a security deposit in an amount determined by the department in accordance with 15 RCNY § 23-04 guaranteeing the continuous and proper maintenance of the proposed private sewer or private drain for as long as such private sewer or private drain remains in use.

      (7)   Owners proposing to construct a private sewer or private drain in a Record street which is not a finally mapped street shall submit all documents required by paragraphs (3) or (4) of this section and a certified copy of a variance issued by the Board of Standards and Appeals for proposed construction on lots not fronting a finally mapped street or a determination from the Department of Buildings that no such variance is required.

§ 23-04 Insurance, Bonding, Security, and Indemnity Requirements for Private Sewers or Private Drains.

   (a)   General requirements.

      (1)   Duty to continuously maintain required insurance. No person may voluntarily cancel, terminate, modify, or allow to expire or lapse any insurance required by this rule without the prior express written consent of the department and presentation of proof that comparable continuous coverage, as determined by the department, has been secured from another insurer meeting the requirements of this rule. The owner shall present certificates of insurance evidencing continuation of insurance coverage as required by this rule no less than 30 days in advance of the date of cancellation, termination, or expiration of the existing insurance.

      (2)   Proof of insurance. Proof of insurance as required by this rule shall be made by presentation of a certificate of insurance issued directly by the insurer to the appropriate department borough records office specifying the named insured, the effective dates of each policy, the limits of each policy, the coverage afforded by each policy, and the name and address of the broker and agency for each policy.

   (b)   Insurance and indemnity requirements for private sewer or private drain construction.

      (1)   Indemnity. The following indemnity shall apply without exception or modification as a precondition to the department's approval of any private sewer or private drain construction permit or the relocation of an existing sewer. All indemnities required by this section shall provide exactly as follows: "If the persons or property of the city or of others sustain loss, damage or injury resulting from the intentional or negligent acts or omissions of the owner or his or her employees, subcontractors, or agents in the performance of construction of the private sewer or private drain, or from his or their failure to comply with the provisions of local laws or of the permit, then the owner shall indemnify, defend, and hold the city harmless from any and all claims and judgements for damages, fees, costs, and expenses to which the city may be subjected or which it may suffer or incur by reason thereof".

      (2)   General liability insurance. As a precondition to the department's approval of an application for a private sewer or private drain construction permit or the relocation of an existing sewer, the owner shall obtain and maintain general liability insurance from a company authorized to write commercial general liability insurance in the State of New York. The required general liability insurance shall:

         (i)   have the following coverage provisions:

            (A)   premises and operations;

            (B)   products/completed operations;

            (C)   independent contractors;

            (D)   collapse, explosion and underground hazards; and

            (E)   deletion of railroad property damage exclusions, where applicable;

         (ii)   be maintained by the Owner, his or her heirs, successors, assigns, and transferees until title to the private sewer or private drain has been vested in the city. For the relocation of existing sewers, the insurance shall be maintained as required herein for a period of one year from the date of final inspection and approval by the department;

         (iii)   be equivalent to the most recent version of the Insurance Services Offices' comprehensive general liability form GC-00-01 or equivalent, and shall provide not less than $1,000,000 per occurrence in bodily injury and property damage combined, $1,000,000 products completed operations and not less than $2,000,000 general aggregate per policy year. Excavations in central business districts shall be subject to a required limit of $3,000,000 per occurrence, $3,000,000 products/completed operations, and $6,000,000 general aggregate. The department shall be named as the insured on form CG-20-13 or equivalent;

         (iv)   expire no sooner than one year after the date of the private sewer or private drain construction permit application and shall name as insured the owner as identified on the private sewer or private drain construction permit application or approval and the title evidenced in connection herewith; and

         (v)   be endorsed to provide not less than sixty days advance notice by the insurance company or its agents to the department of any cancellation, termination, expiration, or modification of the policy. The endorsement shall give the name, title, and proper mailing address of the person in the appropriate department borough records office responsible for oversight of insurance and indemnity requirements.

      (3)   Insurance of subcontractors. The owner shall require that all subcontractors performing work pursuant to a private sewer or private drain construction permit obtain and maintain general liability insurance as required by paragraph (b)(2) of this section and naming the department as the insured. Proof of subcontractor insurance coverage shall be made as required by paragraph (a)(2) of this section.

   (c)   Insurance and indemnity requirements for drainage proposals incorporating special conditions.

      (1)   Required indemnity. The following indemnity shall apply without exception or modification as a precondition to the department's approval of any drainage proposal incorporating such special conditions as the use of a private on-site detention basin, private pumping station, or private sewage treatment plant. All indemnities required by this subdivision shall provide exactly as follows: "If the persons or property of the city or of others sustain loss, damage or injury resulting from the intentional or negligent acts or omissions of the owner or his or her employees, subcontractors, or agents by the operation, maintenance, or use of a private on-site detention basin, private sewage treatment plant, or a private pumping station, or their failure to comply with the provisions of local law or of the permit, then the owner shall indemnify, defend, and hold the city harmless from any and all claims and judgements for damages, fees, costs, and expenses to which the city may be subjected or which it may suffer or incur by reason thereof".

      (2)   Insurance. As a precondition to the department's approval of drainage proposals and private drain plans incorporating the use of a private on-site detention basin, a private pumping station, or a private sewage treatment plant, the owner shall obtain and maintain a liability insurance policy in an amount determined by the department in accordance with this section insuring the city against any damages that may be sustained by virtue of the operation, maintenance, use or failure thereof of the private on-site detention basin, a private pumping station, or a private sewage treatment plant.

   (d)   Duty to maintain and security for the maintenance of private sewers or private drains.

      (1)   When required. The owner of a private sewer or private drain constructed in an unopened record or a finally mapped street to which the city does not have title, an opinion of dedication, or in a sewer easement within the boundaries of the proposed development where access to the public is regulated by the owner thereof, shall maintain the private sewer or private drain and appurtenances thereto in good working order at all times for as long as such maintenance obligation remains in effect. The owner shall further post a security deposit in a form acceptable to the comptroller in an amount determined by the department in accordance with this rule for the purpose of guaranteeing the proper and continuous maintenance of the private sewer or private drain and appurtenances thereto.

      (2)   Duration of security. The security shall remain on deposit with the comptroller until such time as the city acquires title to the streets or sewer easements wherein the private sewer or private drain and appurtenances thereto are located or until such time as the private sewer or private drain is no longer needed due to construction of city drainage plan sewers by the department according to the department's capital sewer construction program schedule.

   (e)   Determination of the dollar amount of title insurance, security deposits, and performance or maintenance bonds. The department shall determine the required dollar amount of title insurance, security deposits, and performance or maintenance bonds required by this rule as follows:

      (1)   the dollar amount of the title insurance policy shall be determined on the basis of the following information and documentation submitted by the applicant:

         (i)   a current tax map showing all the tax blocks and Lots involved in the proposed development;

         (ii)   the area and assessed valuations of each lot, land only, fronting the proposed private sewers or private drains;

         (iii)   the schematic layout of the proposed pipes in the streets or sewer easements indicating the length of the pipes; and

         (iv)   the dimensions and total area of the streets and/or sewer easements to be covered by the title insurance policy.

      (2)   The dollar amount of security deposits required by this rule shall be equal to the linear footage of the private sewer or private drain multiplied by seven, provided, however, that in no event shall the total amount of the required security deposit be less than five thousand dollars. The department may increase the required amount of security deposit in situations involving special conditions as outlined in 15 RCNY § 23-02(c). All maintenance securities shall be deposited with the comptroller's office and shall be in a form acceptable to the comptroller.

      (3)   The dollar amount of performance and maintenance bonds shall be an amount that is equal to the cost of construction, as determined by the department, of the proposed private sewers or private drains.

   (f)   Accident reporting. The owner, applicant, supervising professional engineer or registered architect, or any other person who knows or has reason to know of any accident occurring in connection with any operations related to the construction of a private sewer or private drain and appurtenances thereto, or the relocation of an existing sewer shall make immediate written notice to the department. Such report shall be made whether or not a claim has been or may be made by or against any party to the accident or occurrence causing property damage or bodily injury.

§ 23-05 Standards for Drainage Proposal Approval, Revision, and Revocation.

   (a)   Standard for approval of drainage proposals. The department shall approve drainage proposals or drainage proposal revisions only after the department has determined that such drainage proposals or drainage proposal revisions are complete and are in full compliance with all standards, requirements, and provisions of this rule and the department's most recent design criteria.

   (b)   Duration of approval. The department's approval of a drainage proposal or a drainage proposal revision shall be valid for a period of three years from the date of the department's written approval. The department may, upon written request made by an applicant prior to the expiration date of an approved drainage proposal, extend, without charge, the approval for a one-time sixty day period. An applicant shall be required to submit a new drainage proposal for review and approval if the approved drainage proposal expires before the applicant has obtained the department's approval of his or her private sewer or private drain plan.

   (c)   Status letter. An applicant may request the department to issue a letter to Department of Buildings regarding the status of the proposed private drain provided that the applicant has an approved drainage proposal and has posted all insurance, indemnities, performance and maintenance bonds, and security deposits required by this rule.

   (d)   Revisions. An approved drainage proposal may only be revised subject to the department's approval. The following non-exclusive list of changes to an approved drainage proposal render the approved drainage proposal null and void and require the submission of a drainage proposal revision with the applicable review fee:

      (1)   a change to the type or kind of the proposed development;

      (2)   a change to the point of sanitary or storm water discharge from the site;

      (3)   the addition or deletion of property in the proposed development resulting in a corresponding change to the proposed private drain;

      (4)   a change in the alignment of the proposed piping which does or may result in a change in the hydraulic design of the proposed private drain; or

      (5)   a change in the location of a proposed private on-site detention basin facility.

   (e)   Revocation of drainage proposal approval. The department shall revoke its approval of a drainage proposal at any time if it determines that:

      (1)   any of the information or documentation submitted in support of the drainage proposal is false, inaccurate, or misleading;

      (2)   the approved drainage proposal fails to include adequate provisions for existing conditions that come to the attention of the department after it has approved a drainage proposal; or

      (3)   the applicant has made any of the changes listed in paragraph (d) of this section without prior written approval of the department.

§ 23-06 Standards and Requirements for the Submission and Approval of Private Sewer or Private Drain Plans.

   (a)   Private sewer or private drain plans; when required.

      (1)   Private sewers. Owners proposing to construct a private sewer in compliance with the city drainage plan shall submit a private sewer plan to the department for review and approval.

      (2)   Private drains. Owners proposing to construct a private drain shall submit a private drain plan only after the department has reviewed and approved the owner's drainage proposal. Such private drain plans shall be prepared in accordance with the approved drainage proposal.

   (b)   General requirements for the submission of private sewer or private drain plans. All private sewer or private drain plans shall be prepared by or under the supervision of a professional engineer or registered architect and shall be accompanied by the following information and documentation:

      (1)   a copy of the approved drainage proposal or city drainage plan for the proposed development;

      (2)   a survey prepared or updated by a New York State licensed professional land surveyor within one year of the date of submission of the private sewer or private drain plans to the department showing the proposed development and the route(s) of the proposed private sewers or private drains;

      (3)   a letter from the office of the Borough President of the county in which the proposed development is located verifying the legal status of all streets involved in the proposed development;

      (4)   boring logs prepared in compliance with Appendix A-8;

      (5)   an approved builder's pavement plan;

      (6)   a copy of the latest Tax map of the proposed development as certified by the city surveyor;

      (7)   a copy of the portion of the adopted Final map and, if applicable, pending alteration map showing all streets shown on the private sewer or private drain plans;

      (8)   utility company reply letters received no more than ninety days prior to the date of submission of the private sewer or private drain plan;

      (9)   an engineer's cost estimate prepared in accordance with Appendix A-7;

      (10)   a bill of materials describing all items to be utilized in the construction of the proposed private sewers or private drains;

      (11)   as-built drawings for the existing outlet for the proposed private sewers or private drains. If as-built drawings are not available, then a sewer route survey showing the sewer or drain size, type, material, and invert/rim elevations at the manholes shall be submitted;

      (12)   design calculations for all proposed structures which do not conform to department's most recent sewer design standards;

      (13)   copies of all permits or approvals required by federal, state, and other local laws and regulations;

      (14)   proof of compliance with all legal documentation required by 15 RCNY § 23-03(c) all insurance and security requirements of 15 RCNY § 23-04;

      (15)   a sworn affidavit executed by the owner of the proposed development stating that he or she has submitted all the required legal documents and affidavits required for final approval of the proposed private sewer or private drain and attesting to the truth and validity of such legal documents and affidavits;

      (16)   paper prints prepared in accordance with Appendix A-3; and

      (17)   the department's review fee for private sewer or private drains in accordance with 15 RCNY § 23-08;

   (c)   Standard for approval of private sewer or private drain plans. The department shall approve a private sewer or private drain plans only after that the department has determined that such plans are complete and have been designed and will be constructed in full compliance with all standards, requirements, and provisions of this rule and the department's most recent design criteria.

   (d)   Duration of approval. The department's approval of a private sewer or private drain plan shall be valid for a period of one year from the date of the approval of the plan. The department may, upon written request made by an applicant prior to the expiration date of an approved private sewer or private drain plan, extend, without charge, the approval for a one-time sixty day period. After expiration, the owner shall submit a new private sewer or private drain plan for review. All pertinent documents and permits shall be updated and a revision and approval signature box shall be added to the new private sewer or private drain plan.

§ 23-07 Standards and Requirements for the Submission and Approval of Private Sewer or Private Drain Construction Permit Applications and Professional Engineer or Registered Architect Construction Supervision.

   (a)   Private sewer or private drain construction permit applications; when required. Owners with approved private sewer or private drain plans shall submit a private sewer or private drain construction permit application and all the information and documentation required by subdivision (d) of this section at the time of the preconstruction meeting required by subdivision (c) of this section.

   (b)   Standards and requirements for department's approval of professional engineers and registered architects supervising the construction of private sewers or private drains.

      (1)   Prohibition. No owner proposing to construct a private sewer or private drain may hire a professional engineer or registered architect to supervise the actual construction of a private sewer or private drain without the prior written approval of the department. Once a professional engineer or registered architect is approved by the department, there shall be no change to the owner's approved professional engineer or registered architect or his or her representative without the prior written approval of the department.

      (2)   Requirements for approval. The owner shall submit the name, address, resume, and a list of relevant construction supervision work experience of the professional engineer or registered architect selected to supervise the construction of the private sewer or private drain. If the professional engineer or registered architect will not be personally supervising the construction, then the professional engineer or registered architect shall also submit the resume and list of relevant construction supervision work experience of the person(s) in his or her employ who will be supervising the construction.

      (3)   Standard for approval of professional engineers, registered architects, and their employees. The department shall approve an owner's proposed professional engineer or registered architect to supervise the actual construction of a private sewer or private drain construction project and any related work, drawing, or plans after the department has determined that the professional engineer or registered architect has either:

         (i)   previously directly supervised and successfully completed at least two private sewer or private drain construction projects, or two capital sewer construction projects, or

         (ii)   has worked, with or without a professional license, in a responsible capacity under the direct supervision of a professional engineer or registered architect in connection with all stages of two such projects to their successful completion. The department reserves the right to reject the owner's professional engineer or registered architect if the department has documented that the professional engineer or registered architect failed to fully comply with the department's requirements or orders on any previous private sewer or private drain construction project, or on any capital sewer construction project. The department's approval shall not be unreasonably withheld.

      (4)   Filing of supervision agreement. After the department's approval of the owner's professional engineer or registered architect, the owner shall file a copy of the supervision agreement between the owner and his or her professional engineer or registered architect with the department.

   (c)   Pre-construction meeting. A pre-construction meeting between the department, the owner's professional engineer or registered architect, and the owner's contractor shall be held prior to the issuance of any private sewer or private drain construction permit. The professional engineer or registered architect shall prepare minutes of the meeting and submit the minutes to the department for review and approval. The department shall provide field books to be used by the professional engineer or registered architect.

   (d)   General requirements for the submission of private sewer or private drain construction permit applications. All private sewer or private drain construction permit applications shall be prepared by or under the supervision of the approved professional engineer or registered architect and shall be accompanied by the following information and documentation:

      (1)   an approved and valid private sewer or private drain plan;

      (2)   a completed private sewer or private drain construction permit application on a form supplied by the department signed by the applicant and the department;

      (3)   a street opening permit issued by the city;

      (4)   a signed and notarized copy of the construction contract between the owner and his or her private sewer or private drain contractor including the contractor's bid;

      (5)   an insurance policy complying with the requirements of 15 RCNY §§ 23-03 and 23-04 provided by the owner or his or her contractor and submitted directly by the owner or his or her contractor or their insurance broker to the department's borough records office;

      (6)   performance and maintenance bonds posted by the owner or the owner's contractor in the amount specified on the owner's approved private sewer or private drain plan;

      (7)   the signed and notarized agreement between the owner and his or her approved professional engineer or registered architect supervising the construction of private sewer or private drain;

      (8)   the signed and notarized agreement between owner and his or her contractor;

      (9)   traffic stipulations issued by the city;

      (10)   vendor's list;

      (11)   pavement restoration requirements issued by the city; and

      (12)   the private sewer or private drain construction permit application fee.

   (e)   Standard for approval of private sewer or private drain construction permit applications. The department shall approve a private sewer or private drain construction permit application only after the department has determined that such application is complete and is in full compliance with all standards, requirements, and provisions of this rule and the department's most recent design criteria.

   (f)   Duration of approval. A private sewer or private drain construction permit shall be valid for a period of ninety days from the date of issuance. If construction is not commenced within ninety days from the date of permit issuance, then the permit shall be null and void and the applicant shall be required to submit a new private sewer or private drain construction permit application in accordance with the requirements of this rule before commencing construction of any private sewer or private drain.

   (g)   Place of issuance. The department's borough records office shall issue private sewer or private drain construction permits.

   (h)   Commencement of construction and assignment of the approved professional engineers, registered architects, or their approved employees at the construction site.

      (1)   Commencement of construction. The private sewer or private drain construction permit shall specify a construction start date and time that is mutually acceptable to the department and the approved professional engineer or registered architect.

      (2)   Assignment of the approved professional engineers, registered architects, or their approved employees at the construction site. The approved professional engineer or registered architect shall maintain full time on-site construction inspection and supervision services at the construction site from the time construction commences to the time of final completion. The approved professional engineer, registered architect, or their approved employees shall telephone the department daily between 8:30 a.m. and 9:00 a.m. to report his or her presence at the construction site and to report on the scheduled work for the day.

      (3)   Duty to inform the department of construction problems or field changes. The approved professional engineer or registered architect shall promptly report to the department any construction or job related problems or any field changes that arise or are anticipated.

   (i)   Post-construction record submissions. After completion of the construction of a private sewer or private drain and prior to final acceptance of such private sewer or private drain by the department, the approved professional engineer or registered architect shall submit to the department two notarized lists of actual costs incurred in the private sewer or private drain construction along with a copy of all bills, invoices, and receipts from all contractors, subcontractors, vendors, manufacturers, and any other entities which provided goods or services.

   (j)   Required field records. The approved professional engineer or registered architect or their approved employee shall maintain the following field records on forms supplied by the department:

      (1)   daily construction record book;

      (2)   professional engineer or registered architect's record drawings;

      (3)   water service location sketch;

      (4)   existing pavements' sketch;

      (5)   property damage and accident reports;

      (6)   line and grade layout and field changes;

      (7)   summary of laboratory reports;

      (8)   concrete cylinder summary sheet;

      (9)   layout and final measurement book;

      (10)   line and grade stake out;

      (11)   field changes;

      (12)   final inspection, measurements, and TV inspection and video taping;

      (13)   final restoration of pavements;

      (14)   concrete strength analysis;

      (15)   tracings-as-built record;

      (16)   supervision of site connections;

      (17)   partial approval for site connections; and

      (18)   completion and acceptance certification.

§ 23-08 Application and Filing Fees.

   (a)   General requirements. All applications for the review and approval of drainage proposals, private sewer or private drain plans, private sewer or private drain construction permits, and the supervision of construction and material testing shall be accompanied, at the time of submission, with the appropriate filing fee as established by section two of the New York City Water Board's Water and Sewer Rate Schedule as amended from time to time. A copy of the latest fee schedule may be obtained from the department by request.

   (b)   Payment of new application fee upon expiration of proposals or plans. Payment of a new application fee shall be required for the renewal of an expired drainage proposal or private sewer or private drain plan.

   (c)   Payment of new application fee upon department's determination of need for substantial revisions to drainage proposals, private sewer or private drain plans, or construction permits. After the department has completed it's initial review, any drainage proposal, private sewer or private drain plan which the department determines requires extensive revisions for such reasons including, but not limited to, a major change in the alignment of the proposed private sewer or private drain, major changes in points or methods of discharge into the outlet system, major changes in the type or kind of the proposed development, and deficiencies that make drainage proposals, private sewer plan or private drain plan unsafe or infeasible, shall be subject to an additional fee in an amount equal to one half of the amount of the review fee for the revised submission.

Appendix A-1: Standards for the Design of Private Sewers or Private Drains

   (a)   Standards for the design of private sewers or private drains. All private sewers or private drains shall be designed in accordance with the standards and requirements of this rule and the department's most recent drainage design criteria. All design flow computations shall be made in accordance with the most recent zoning designations established by the city.

   (b)   Sewer size. The minimum Private sewer or Private drain sizes shall be 10" diameter for sanitary sewers or drains, 12" diameter for storm sewers or drains, and 15" diameter for combined sewers or drains. The following diameters shall be used for sewers up to 18": 10", 12", 15", 18". After 18", private sewer or private drain diameters shall increase in 6" increments to a maximum of 72".

   (c)   Manning's Coefficient. The Manning Coefficient 'n' for extra strength vitrified clay pipes, or precast reinforced concrete pipes, precast concrete box sewers, and ductile iron pipes, shall be n = 0.013. For poured-in-place box sections, the Manning's Coefficient shall be n = 0.015.

   (d)   Depth of proposed private sewers or private drains. The minimum depth of cover to the outer top of private sewers or private drains shall be 4.0 feet for storm sewers or drains, 10.0 feet for sanitary and combined sewers or drains, and 5.0 feet for force mains. In situations where the depth of cover to the outer top must be reduced, an absolute minimum of 3.5 feet for storm sewers or drains and 8.5 feet for sanitary and combined sewers or drains shall be maintained at all times. The maximum depth to the invert of the pipe shall not be greater than 18.0 feet.

   (e)   Clearance. The minimum net vertical clearance between the invert of storm sewers or drains and the inner top of sanitary sewers or drains shall be 2 feet. At street intersections where there are no site connections, the minimum net clearance between the outside of storm sewers or drains and the outside of sanitary sewers or drains shall be 6 inches.

   (f)   Slopes and velocities. Wherever possible, the slope of the private sewer or private drain should be approximately parallel to the ground surface. The slope of private sewers or private drains shall be computed, based upon mapped street lengths, to the nearest 0.01% generally and to the nearest 0.001% on very flat slopes. The minimum velocity for pipes flowing full shall be 3.0 feet per second (fps) for storm sewers or drains and combined sewers or drains. The minimum velocity for sanitary sewers or drains flowing full shall be 3.0 fps until a design flow of 0.7 cubic feet per second (cfs) is attained. After this quantity of flow has been reached, sanitary sewers or drains shall be designed according to the standard criteria for pipes flowing full with a minimum velocity of 2.5 fps. Maximum velocity for pipes flowing full shall be 15 fps. In no case shall the slope exceed 10%. In the case of very steep slopes, drop manholes shall be provided so that the maximum velocity is within the allowable limits. The depth of drop in drop manholes shall be measured from the invert of the higher sewer or drain to the spring line of the lower sewer or drain. Specially constructed drop pipe manholes shall be used in situations where the drop is 4.0 feet or greater. Velocities shall be computed to the nearest 0.01 fps for velocities under 10 fps and to the nearest 0.1 fps for velocities greater than 10 fps.

   (g)   Design capacity and depth of flow. The Manning's formula shall be used to compute the capacity of proposed Private sewers or Private drains. The maximum design depth of flow in the sewer or drain shall be full for all circular and elliptical sewers or drains and 95% full for flat-top monolithic sections with a minimum freeboard of 3".

   (h)   Sewer elevation at junctions. Wherever possible, inside top elevations of private sewers or private drains should be matched at all junctions and manholes. For free discharge storm sewer or drain outlets, the inner top of the outlet sewer or drain shall be above the mean high water elevation. For free discharge sanitary sewers or drains, the inner top of the sanitary sewer or drain shall be no lower than the inner top of the intercepting sewer into which it outlets. Information pertaining to the mean high water elevation can be obtained from the records of the nearest tidal station. All parkways, highways, expressways, and the similar roadways within the area encompassed by the drainage plan shall be considered in the design. The drainage system within such areas and the sewer system into which it outlets shall be designed in accordance with the department's latest design criteria. Manhole losses shall not be considered in the design of private sewers or private drains. These losses are accounted for in the matching of inner tops and by designing the pipe flowing full. All private sewers or private drains shall be designed for open channel gravity flow.