2021-093 Ordinance - Laserfiche WebLink

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EXHIBIT A: CHAPTER 928 Alteration or termination of these stipulations is prohibited. 12. Required Calculations: The applicant shall submit calculations for projected stormwater runoff flows, volumes, and timing into and through all SCMs for flood control, channel protection, water quality, and the habitat, stability, and incision of each water resource and its floodplain, as required in Section 928.09 of this regulation. These submittals shall be completed for both pre- and post - development land use conditions and shall include the underlying assumptions and hydrologic and hydraulic methods and parameters used for these calculations. The applicant shall also include critical storm determination and demonstrate that the runoff from offsite areas have been considered in the calculations. 13. List of all contractors and subcontractors before construction: Prior to construction or before the pre -construction meeting, provide the list of all contractors and subcontractors and their names, addresses, and phones involved with the implementation of the Comprehensive Stormwater Management Plan including a written document containing signatures of all parties as proof of acknowledgment that they have reviewed and understand the requirements and responsibilities of the Comprehensive Stormwater Management Plan. 14. Existing and proposed drainage patterns: The location and description of existing and proposed drainage patterns and SCMs, including any related SCMs beyond the development area and the larger common development area. 15. For each SCM to be employed on the development area include the following: a. Location and size, including detail drawings, maintenance requirements during and after construction, and design calculations, all where applicable. b. Final site conditions including stormwater inlets and permanent nonstructural and structural SCMs. Details of SCMs shall be drawn to scale and shall show volumes and sizes of contributing drainage areas. C. Any other structural and/or non-structural SCMs necessary to meet the design criteria in this regulation and any supplemental information requested by the City Engineer. d. Each SCM shall be designated with an individual identification number. 928.09 PERFORMANCE STANDARDS A. General: The stormwater system, including SCMs for storage, treatment and control, and conveyance facilities, shall be designed to prevent structure flooding during the 100 -year, 24-hour storm event; to maintain predevelopment runoff patterns, flows, and volumes; and to meet the following criteria: Integrated practices that address degradation of water resources: The SCMs shall