For any regulated activities, the preliminary or final approval of subdivision and/or land development plans, the issuance of any building or occupancy permit or the commencement of any land disturbance activity may not proceed until the applicant has received written approval of a SWM site plan from the township and the corresponding issuance of a stormwater management permit:
(A) Appropriate sections from the township subdivision and land development ordinance, and other applicable township ordinances, shall be followed in preparing the swm site plan;
(B) The township shall not approve any SWM site plan that is deficient in meeting the requirements of this chapter. At its sole discretion and in accordance with this subchapter, when a SWM site plan is found to be deficient, the township may either disapprove the submission and require a resubmission, or, in the case of minor deficiencies, the township may accept submission with modifications;
(C) Provision for permanent access or maintenance easements for all SWM facilities, such as ponds and infiltration structures, as necessary to implement the operation and maintenance (O&M) plan;
(D) The following signature block for the township:
“(Township official or designee), on this date (Signature date), has reviewed and hereby certifies that the SWM Site Plan meets all design standards and criteria of the Township Ordinance No. (number assigned to this Ordinance).”
(E) The SWM site plan shall provide the following information:
(1) The overall stormwater management concept for the project;
(2) A determination of site conditions in accordance with the BMP Manual;
(3) Stormwater runoff design computations and documentation as specified in this chapter, including the recommendations and general requirements in § 151.025;
(4) When infiltration methods such as seepage pits, beds or trenches are proposed between any septic system and any facility used for stormwater management, an analysis shall be submitted to verify that stormwater infiltration shall not affect groundwater elevation at the septic drain field site;
(5) Expected project time schedule;
(6) A soil erosion and sediment control plan, where applicable, as prepared for and submitted to the Conservation District;
(7) The effect of the project (in terms of runoff volumes, water quality and peak flows) on surrounding properties and aquatic features and on any existing stormwater conveyance system that may be affected by the project;
(8) Plan and profile drawings of all SWM BMPs, including drainage structures, pipes, open channels and swales;
(9) SWM site plan shall show the locations of existing and proposed on-lot wastewater facilities and water supply wells;
(10) SWM site plan shall include an O&M plan for all existing and proposed physical stormwater management facilities. This plan shall address long-term ownership and responsibilities for the operation and maintenance of these facilities, as well as schedules and costs for such operation and maintenance activities;
(11) All SWM site plans shall note that stormwater management facilities are a permanent part of the development and shall not be removed, altered or modified without approval from the township; and
(12) A justification must be included in the SWM site plan if BMPs other than green infrastructure methods and LID practices are proposed to achieve the volume, rate and water quality controls under this chapter.
(Ord. 239, passed 10-14-2020)