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Ms. Rachel Juba <br />October 18, 2018 <br />Page 2 <br />2. Wetland 01 is considered a sloped wetland, created by the transition from sandy soils to muck. There <br />is as much as 30' of elevation change from the type 3 wetland portion in the northeast portion of the <br />wetland and the upslope southwestern terminus. Based on this, the hydrology of wetland 01 appears <br />to be fed by surface water drainage from the adjacent uplands and not groundwater; though this is not <br />supported by borings or other groundwater data. Development of the site needs to ensure surface <br />water drainage to wetland 01 is not reduced from existing rate and volume to maintain existing <br />wetland hydrology. <br />3. Storm Water Management: The applicant will need to obtain a permit from the City for their <br />Storm Water Management Plan within the site, including the appropriate storage, rate <br />control, treatment, and volume reduction. The applicant is utilizing swales, culverts and <br />ponding. Stormwater management proposed has been reviewed and comments have been <br />provided to the applicant. These comments currently being addressed. The comments <br />provided are not significant and are not expected to alter the preliminary plat. A summary of <br />the requirements are listed below: <br />a. The site must meet volume reduction requirements of treating 1.1 inches off new <br />impervious areas. <br />b. Rate control from the site must be less than existing for the 2-year, and 10-year <br />rainfall event. Rate control for the 100-year event must be limited to 0.1 cfs/acre. <br />c. Lowest building opening must be 3 feet above the 100-year HWL of the existing <br />wetlands and/or stormwater BMP's, 3 feet above the highest known groundwater <br />elevation and 4 feet above the flood plain. <br />d. An easement must be established over stormwater management facilities, <br />stormwater conveyances, ponds, wetlands, on -site floodplain up to the 100-year <br />flood elevation. <br />e. Any offsite drainage must be included in the submitted drainage maps and <br />models. <br />Transportation <br />1. Access Locations: The proposed public roadway access location is appropriately aligned <br />with the access point located directly across from Hilo Avenue. A sight distance analysis has <br />been conducted at this access location and sight distance is adequate. The access to lot 4 has <br />been relocated from directly across from Homestead Avenue to a location to the east as sight <br />distance on the inside portion of the curve was limited. <br />2. Future Trail Location: The Comprehensive plan identifies a future trail along 125a' Street. <br />The proposed 10-ft drainage and utility easement along 125th Street should also allow for <br />trail construction in the future. <br />Sanitary Sewer and Water Service <br />1. Sewer and Water: The property is not located in the MUSA. The property is proposed to <br />have individual sewage treatment systems and individual wells for the proposed 12 parcels. <br />Development Agreement <br />