02-16-2016 Planning Commission Packet

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Preliminary Plat Application 1b-3807 Orono Preserve Page 3 deemed necessary should be submitted prior to final agproval, or the plans should be revised to maintain all wark on site. 4.4 General Crrading Notes should be revised to indicaze a minimum 6"topsoil used for re-sgread. 4.5 Low opening elevations for lots adjacent to the ponds and wetlands need to be raised as necessary to provide a minimum 2' vertical separation to the 100 year high water levels. Lots 1�and 16, Block 4 appear to�uire adjustment 4.6 Grading on the north side of Lot 1,Block 3 should be adjusted to direct backyard drainage to the proposed catchbasin on Street B. 5.4 GRADING PROFILES: 5.1 Profiles should be adjusted as necessary to provide a minimurn k-value of 15 for crest vertical curves and 26 for sag vertical curves(standard for a 25 mph design). 6.0 EROSION AND SEDIMEI�IT CONTROL PLAN: 6.1 Notes should be revised to indicate perimeter erosion control measures and protection fencing will be installed by Contractor and inspected by City prior to any demolition or land disturbance. Contractar must provide 24 hour notice prior to inspection. 6.2 Plans indicate proposed permanent stormwater management basins will be used for temporary sediment basins during construction. Additional sequencing notes and linework should be included as necessary to provide clear direction for installation schedule of perimeter sediment control devices,temparary sediment basins,rough grading and temporary ditching,temporary seeding,utility and street construction,site stabilization(including topsoil re-spread,erosion control blanket,ripxap, and permanent vegetation),removal of perimeter measures,consituction sediment removal, ouflet control structure installation,and permanent stabilization of the ponds. 6.3 Dou61e siltfence must be p�rovided adjacent to wetlands where grading is pr�posed within 50' of the wetland 6.4 Siltfence location should be revised as necessary to be located entirely within project boundaries. 7.0 SANTTARY SEWER AND WATfiR MAII�PLAN 7.1 The plan view should be eapanded ta sbow work proposed for connection to e�sting sanitary sewer in the intersection of CSAH 112 and Old Crystal Bay Road. 7.2 Rims and inverts of proposed sanitary sewer manholes and pipe characteristics(size,length, slope, and material) should be indicated on pIan so sewer can be adequately reviewed. 7.3 An 8"sanitary sewer trunk Iine should be installed at minimum grade to the end of SCraet D and then north along the property line,terminating on die northwest corner of Lot 1,Block 1. 7.4 Sanitary sewer appears to be in conflict with the stortn sewer and easements on the norkh end of Street C. Utility alignments should be adjusted as necessary Eo reznove conflicts. 7.5 General Utility Notes indicate C900 PVC will be used for watermain,but the plan label indicates DIP will be used. Notes and plan should be revised to be cansistent. 7.6 A 12"trunk watermain line shoe�ld be installed adjacent to the trunk sanitary line, terminating in a temporary hydrant on the northwest corner of Lot 1,Block 1. 7.7 Watermain on 3treet B shauld be placed on the north side of road to accommodate stoim sewer on the south side.