2021-093 Ordinance - Laserfiche WebLink

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EXHIBIT A: CHAPTER 928 measures to prevent predictable degradation of water resources. B. Preparation by Professional En ineer: The Comprehensive Stormwater Management Plan shall be prepared by a registered Professional Engineer and include supporting calculations, plan sheets, and design details. To the extent necessary, as determined by the City Engineer, a site survey shall be performed by a registered Professional Surveyor to establish boundary lines, measurements, or land surfaces. C. Community Procedures: The City Engineer shall prepare and maintain procedures providing specific criteria and guidance to be followed when designing the stormwater management system for the site. These procedures may be updated from time to time, at the discretion of the City Engineer based on improvements in engineering, science, monitoring, and local maintenance experience. The City Engineer shall make the final determination of whether the practices proposed in the Comprehensive Stormwater Management Plan meet the requirements of this regulation. The City Engineer may also maintain a list of acceptable SCMs that meet the criteria of this regulation to be used in the City Engineer. D. Contents of Comprehensive Stormwater Management Plan: The Comprehensive Stormwater Management Plan shall contain an application, narrative report, construction site plan sheets, a long-term Inspection and Maintenance Plan and Inspection and Maintenance Agreement, and a site description with the following information provided: Site description: a. A description of the nature and type of the construction activity (e.g. residential, shopping mall, highway, etc.). b. Total area of the site and the area of the site that is expected to be disturbed (i.e. grubbing, clearing, excavation, filling or grading, including off-site borrow areas). C. A description of prior land uses at the site. d. An estimate of the impervious area and percent imperviousness created by the soil -disturbing activity at the beginning and at the conclusion of the project. e. Selection (source and justification) and/or calculations of runoff coefficients for water quality volume determination, peak discharge control (curve number/critical storm method), and rational method. f. Existing data describing the soils throughout the site, including soil map units including series, complexes, and association, hydrologic soil group, porosity, infiltration characteristics, depth to groundwater, depth to bedrock, and any impermeable layers. g. If available, the quality of any known pollutant discharge from the site such as that which may result from previous contamination caused by prior land uses. h. The location and name of the immediate water resource(s) and the first subsequent water resource(s).