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Planning Commission Regular Meeting Minutes February 26, 2018 Page 9 e. Provide a safety railing or fence above the wall. 1 2. Driveway ramps into the buildings should not exceed d10%. 2 3. The outdoor patios and plazas with the building do not appear to have any slope. How will 3 surface drainage be accomplished? 4 4. The NWL of the southwestern storm water pond is the same elevation as the Multi-5 residential 1 garage floor (912.0). 6 5. The HWL of both ponds exceed the garage levels of the connected buildings. 7 6. Demonstrate how the proposed improvements accommodate for the current ground water 8 elevations. 9 7. There are areas where the slopes shown do not meet the minimum required 2% or exceed the 10 maximum allowed 3:1. 11 8. The driveway elevations at the top of the ramps need to be raised to achieve a minimum 1’ 12 freeboard above the adjacent road’s EOF. 13 14 Sanitary Sewer and Watermain 15 1. There appears to be a conflict between the storm sewer and sanitary sewer service to the 16 assisted senior living facility. 17 2. Provide 4” thickness of insulation at water main and storm sewer crossings where storm 18 sewer and drainage structures provide less than 3.5 feet of cover (not 2.0’) over the water 19 main. 20 3. Verify an 8” water main as proposed will provide adequate fire flow and pressure to serve the 21 number of units and building elevations being proposed. 22 4. Water and sanitary connections to buildings must conform to the plumbing code as 23 interpreted by the local building officials. 24 5. The applicant shall include a drain tile system behind the curbs to convey sump pump 25 discharge from the units as detailed in the City Standard Specifications. 26 6. The proposed 24” pipe between Ex. Structure 16 and MH 1 appears to be oversized assuming 27 it is proposed to take the existing 9” line from the west and the proposed 10” line from the 28 development. 29 7. Due to the depth, this pipe should be shown as SDR 26 with the construction plans and the 30 adjacent storm sewer should be shown as being impacted with construction. 31 8. Provide for granular bedding for installed utility pipe in unsuitable materials per the 32 applicable City standard detail plate. 33 9. Show and call out the size and material of the existing waterlines where the development is 34 connecting on the west and south. 35 10. The Independent Senior Living facility is shown with an 8” DIP service while the other 36 facilities were shown with 6” DIP services. Was this done by design? 37 11. Provide 45-degree bends in lieu of 90-degree bends near the western connection with the 38 existing water main. 39 12. Place a hydrant at the original proposed location along Kenzie Terrace near the connection to 40 the existing water main on the south side of the development. The main can be 41 capped/plugged at that point. 42 43 Detail Sheet 44