(A) The different elements of a permit submittal include an application checklist, construction plans, a storm water drainage technical report, a storm water pollution prevention plan for active construction sites, a post-construction storm water pollution prevention plan, and any other necessary supporting information. All plans, reports, calculations, and narratives shall be signed and sealed by a professional engineer or a licensed surveyor, registered in the State of Indiana who also meets the definition of a trained individual found in § 52.501.
(1) Application checklist. As part of the City of Decatur storm water management permit application package, the application checklist provided in the City of Decatur Storm Water Technical Standards Manual must be completed by the applicant and provided along with other required supporting material.
(2) Construction plans. Construction plan sheets (larger than 11 inches by 17 inches, but not to exceed 24 inches by 36 inches in size) and an accompanying narrative report shall describe and depict the existing and proposed conditions. Note that in order to gain an understanding of and to evaluate the relationship between the proposed improvements for a specific project section/phase and the proposed improvements for an overall multi-section (phased) project, the detailed information requested herein for the first section/phase being permitted must be accompanied by an overall project plan that includes the location, dimensions, and supporting analyses of all detention/retention facilities, primary conveyance facilities, and outlet conditions. Construction plans must include items listed in the application checklist provided in the City of Decatur Storm Water Technical Standards Manual.
(3) Storm water drainage technical report. A written storm water drainage technical report must contain a discussion of the steps taken in the design of the storm water drainage system. Note that in order to gain an understanding of and to evaluate the relationship between the proposed improvements for a specific project section/phase and the proposed improvements for an overall multi-section (phased) project, the detailed information requested herein for the first section/phase being permitted must be accompanied by an overall project plan that includes the location, dimensions, and supporting analyses of all detention/retention facilities, primary conveyance facilities, and outlet conditions. The technical report needs to include items listed in the application checklist provided in the City of Decatur Storm Water Technical Standards Manual.
(4) Storm water pollution prevention plan for construction sites. For sites with total disturbance of one acre or more, a storm water pollution prevention plan associated with construction activities must be designed to, at least, meet the requirements of this chapter. The SWPPP and construction plans must include the items listed in the application checklist provided in the City of Decatur Storm Water Technical Standards Manual. For land disturbances totaling 10,000 square feet or more of land area but less than one acre, appropriate erosion and sediment control measures that are consistent with the City of Decatur Technical Standards must be designed and shown on the plans.
(5) Post-construction storm water pollution prevention plan. For sites with total land disturbance of one acre or more of total land area, a post-construction storm water pollution prevention plan must be designed to, at least, meet the requirements of this chapter and must include the information provided in the City of Decatur Storm Water Technical Standards Manual. The post-construction storm water pollution prevention plan must include items listed in the application checklist provided in the City of Decatur Storm Water Technical Standards Manual.
(B) Specific projects or activities may be exempt from all or part of the informational requirements listed in this section. If based on the applicability and exemptions noted in §§ 52.202, 52.302, or 52.402, the applicant believes that a project or activity is exempt from some or all requirements noted in this section, an application should be filed listing the exemption criteria met, in lieu of the information requirements listed in this section. This level of detailed information is not required from individual lots, disturbing less than one acre of land, developed within a larger permitted project site. Review and acceptance of such lots is covered under § 52.509.
(Ord. 2023-11, passed 8-1-2023)