11-28-2016 Council Packet - Laserfiche WebLink

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Final Plat Application 16-3860 Kintyre Preserve Page 3 5.3 Proposed building pads do not fit topography in a few locations as follows: a. Lot 2 — a driveway over 12% would be required, existing topography slopes 18% across pad, and extensive retaining wall would be required. Further consideration should be given regarding mass grading of this lot and raising the pad elevations. b. Lot 3 — the proposed walkout elevation is 3' below the adjacent drainage swale bottom. Grading should be revised or the proposed pad elevation raised to minimize potential for runoff to be directed into the structure. 5.4 The grading around the pond should be revised to provide a minimum 1' freeboard from the 100 year high water level to the top of the berm. The bottom of the emergency overflow should be located at the 100 year high water elevation. 6.0 FINAL STREET PLAN: 6.1 Several horizontal curves do not meet the minimum 275' radius requirement for streets with a design speed of 30 mph. The three small curves near the connection to the existing street should be removed, and the radius of the curve at approximately station 5+00 should be increased slightly to the minimum. 6.2 The typical section for the shoulder in the rural section should be included on the plan. 6.3 Notes detailing procedure and schedule for connection of new street to existing Kintyre Lane should be included with plan. Bituminous pavement should be saw -cut for clean match lines. Enough existing curb and gutter should be removed to install 15' radii to the new alignment. Final extent of existing infrastructure removal shall be coordinated in field with City prior to any demolition. Notes should also include schedule for removal of Construction access. 7.0 FINAL UTILITY PLAN: 7.1 Inverts indicated for FES 1, CB2, and CB3 do not match proposed grading. It appears inverts should be adjusted approximately 6.0' up. 7.2 Inverts should be provided for draintile installed in filtration shelf to ensure system is correctly installed. Draintile should be extended to high water level on "dead-end" runs, and cleanouts installed at terminations to allow for maintenance. 7.3 Castings should be indicated on plan for inlets. Neenah casting R -3067-V is recommended. 7.4 Notes should be included to indicate that a 15" culvert must be installed at driveway connections to the street for those lots along the rural section when the house is constructed. 8.0 FINAL EROSION CONTROL PLAN: 8.1 Notes should indicate perimeter erosion control measures and protection fencing will be installed by Contractor and inspected by City prior to any demolition or land disturbance. Contractor must provide 24 hour notice prior to inspection. 8.2 Erosion control blanket should be installed on slopes of 3:1 and swales/ditches. Hatching should be indicated on the plan to ensure adequate coverage. 8.3 Turf reinforcement mat should be installed where the curb and gutter transitions to ditches in order to minimize potential for erosion. 8.4 Inlet protection should be installed on existing Kintyre Lane on the first inlets downstream from the project site.