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2. Project limits and property lines including the location of any existing and proposed utilities and <br />easements. <br />3. A schedule indicating the time of the construction activities, implementation, maintenance, and removal of <br />erosion and sediment control measures, and permanent site stabilization measures. <br />4. Inspection schedules and time frames. <br />5. Identification of property owner, operator, and individuals responsible for the implementation of the <br />Erosion and Sediment Control Plan, including name, phone number and email address. <br />2. Stormwater Management. <br />1. Policy Statement. It is the policy of the City to: <br />1. Manage new development, redevelopment and drainage alternations by requiring each development or <br />land disturbing activity to manage its stormwater effectively, either on or off -site. <br />2. Promote and encourage a reduction in runoff rates, encourage infiltration and promote groundwater <br />recharge. <br />3. Maximize groundwater recharge as a means of maintaining drinking water supplies, preserving base flows <br />in streams, and limiting discharges of stormwater to downstream receiving waters. <br />4. Assure that property owners control the rate and volume of stormwater runoff originating from their <br />property so that surface water and groundwater quantity and quality is protected or improved, soil erosion <br />is minimized, and flooding potential is reduced. <br />5. Protect and improve natural resources within the watershed to prevent further degradation. <br />2. Regulation. No person shall commence construction activities of 10,000 square feet or greater, unless granted a <br />variance, without first obtaining a permit from the City that incorporates and approves a stormwater management <br />plan for the activity, development or redevelopment. <br />1. Rate Control. The proposed activity will not increase the peak stormwater runoff rate from the site, under <br />pre -development conditions, for the 2-, 10- and 100-year, critical duration (24-hour_ storm events, using <br />Atlas 14 rainfall depths and antecedent moisture conditions 2 (AMC-2), for all discharge locations. The <br />storm distribution shall be a NRCS MSE 3 MN distribution or the nested distribution for Atlas 14 based <br />data. Discharge rates leaving the site should: <br />1. Be reduced from existing rates where feasible; <br />2. Not accelerate on or off -site water course erosion, downstream nuisance, flooding or damage as <br />demonstrated by the applicant; and/or <br />3. Runoff rates may be restricted to less than the existing rates as deemed necessary by the City <br />staff for the protection of public health, safety and general welfare. <br />2. Volume Control. Projects where the sum of the new impervious surface and the fully reconstructed <br />impervious surface equals one or more acres must control volume onsite. The following volume control <br />standards apply: <br />1. Non -linear projects shall treat 1.1-inch of runoff from the sum of the new and the fully <br />reconstructed impervious surfaces. <br />2. Linear projects shall treat the larger of the following: <br />1. 0.55-inch of runoff from the sum of the new and the fully reconstructed impervious <br />surfaces; or <br />2. 1.1-inch of runoff from the net increase in impervious surfaces. <br />Updated January 2025 — Gem Lake Consolidated Land Use Ordinance No. 131 110 <br />