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<br />RCWD Alternative Compliance Sequencing Report <br />City of St. Anthony Village PAGE 14 <br />WSB Project No. 1626-53 <br />III. WATER QUALITY / VOLUME CONTROL REQUIREMENTS <br /> <br />This Section outlines the water quality and volume control standards and requirements of <br />RCWD, and quantifies the required standards to meet RCWD Rules for all of the City’s <br />right of way within the RCWD. The requirements to meet RCWD Rules for upcoming <br />linear projects are also presented. <br /> <br />A. RCWD Volume Reduction Standards <br />Volume reduction standards for linear reconstruction projects are based on the <br />following street classifications: <br /> <br /> If a Highway, County Road, or Arterial Road; infiltration of 1.0-inch of <br />runoff is required from the new and reconstructed impervious surface <br /> <br /> If a Collector, Subcollector, or Access Road; infiltration of 0.8-inches of <br />runoff is required from the new and reconstructed impervious surface and <br />the directly connected impervious surfaces within the project corridor <br /> <br />It is our understanding that the RCWD’s Rules have been established to reduce <br />runoff volumes, peak discharge rates, and pollutant loads discharged to surface <br />waters. <br /> <br />B. Required Volume Reduction for All City Right of Way <br />The RCWD’s volume reduction requirement for all impervious areas within the <br />City Right of Way and within the RCWD was calculated based on the information <br />provided below. <br /> <br />The study area has been divided into three subwatersheds. Each subwatershed <br />represents drainage to a discharge point of concern. A list of the subwatersheds and <br />a description of the discharge point of concern are listed below (see Figure 1): <br /> <br /> Silver Lake <br />This subwatershed includes portions of the City that drain to Silver <br />Lake. This subwatershed draining to the Lake is a priority for <br />stormwater management to ensure that this resource of the City <br />remains protected and to ensure RCWD Rules and TMDL Goals can <br />be achieved for areas draining to the Lake. Silver Lake is among the <br />highest valued natural resources within the City. It offers <br />recreational opportunities and a natural setting to urban residents. <br />The Lake is listed by MPCA as impaired and a TMDL Plan has been <br />developed to address water quality standards within the Lake. <br /> <br /> Ramsey County Ditch 3 <br />This subwatershed includes runoff that drains to Foss Road and <br />Silver Lane storm sewer (Ramsey County Ditch 3), including the