09-12-2016 Council Packet - Laserfiche WebLink

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Preliminary Plat Application 16-3847 Shadywood Villas Page 2 1.9 The applicant will be required to submit a Maintenance Agreement for all stormwater management facilities. The agreement should define maintenance responsibilities following completion of project, specify types and frequencies of inspection and maintenance activities, and designate who will conduct inspection and maintenance activities. 1.10 Record drawings must be submitted upon completion of the project. If proposed permanent ponds are to be used as temporary sediment basins during construction, as -built survey shots on ponds must be obtained after construction sediment is removed and side slopes re -dressed. Also, due to the size of the proposed disturbed area, a survey should be provided for the site after rough grading is complete to ensure correct hold-downs prior to topsoil placement and pavement construction, and a survey should be provided for the topsoil stockpile to ensure adequate quantity for re -spread. 2.0 PRELIMINARY PLAT: 2.1 A Flowage and Conservation easement will be required over the wetland. 2.2 Drainage and Utility Easements should be adjusted to adequately cover all ditching, storm sewer, and ponds to the high water level. Easements should also be indicated on Final Grading and Utility Plans in order to verify coverage. 3.0 SITE PLAN: 3.1 A stop sign and stop bar should be provided at the intersection with C.R. 19 (Shadywood Road). 3.2 The Entry Monument and fence along the street are located almost directly over proposed storm sewer. The layout should be adjusted to remove any conflicts between them. 3.3 Final street width and layout should be reviewed by the Fire Chief to ensure adequate space for operation of fire department vehicles. 4.0 GRADING AND DRAINAGE: 4.1 Emergency overflow routes should be clearly labeled to ensure adequate surface overflows are provided. 4.2 Pond data (NWL and 100 year HWL) should be included on plans in order to verify adequate Drainage and Utility Easements and low opening elevations. Low opening elevations for lots adjacent to ponds and wetlands must provide a minimum 2' vertical separation to the 100 year high water levels. 4.3 Due to inadequate space, the grading along the northwest side of Lot 7 should be revised. In order to provide a swale that will adequately route runoff to the proposed northwest pond, the berm separating runoff from the adjacent property will have to be removed. This will result in additional runoff being routed to the proposed system, and the stormwater management plan should be adjusted accordingly. 4.4 Additional detail must be provided for proposed filtration areas. Typical sections, contours, spot elevations, underdrain location, outlet structures, and sequencing notes should be included as necessary. 4.5 Clear access must be provided to all stormwater management facilities. An 8' wide, flat clear zone should be provided to all outlet structures.