11/14/2012 P&Z Packet - Laserfiche WebLink

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to be re- drilled in the future. At the time of failure, the applicant will need to connect the irrigation to the municipal water supply. 2. The existing trunk sanitary sewer and watermain that are being tied into at the southwest corner of the site need to be shown on the utility plans. 3. The City is concerned with the constructability of the trunk sanitary sewer along Lake Drive. The proposed sanitary sewer is approximately 25 feet deep and only 7 feet away from the edge of the existing roadway. The applicant needs to design the sanitary sewer so that an OSHA approved trench can be constructed without impacting the roadway or traffic on Lake Drive. 4. A temporary hydrant is required at the north end of the trunk watermain along Lake Drive for flushing purposes. 5. The sanitary sewer service for the liquor store cannot connect directly to the sanitary sewer manhole. The service is required to connect to the 8 -inch sewer main with an 8" x 6" wye. 6. Please confirm that there is a minimum of 18 inches of clearance between the liquor store sanitary sewer service and the 8 -inch watermain. 7. The detail plates included in the plans are not the City of Lino Lakes standard detail plates. The City's plates are currently being updated and will be provided to the applicant once they are complete. Grading Plan 1. The City is concerned with the proposed valley gutter that is shown crossing the southerly driveway access onto Main Street. It appears that this could be an issue in the spring with freezing and thawing which could create unsafe driving conditions. The applicant needs to explore alternative methods for conveying storm water across this location. 2. Curb cuts and associated grading must be clearly shown on plans to ensure that runoff is directed to ditch on east side of property. One particular area of concern is the northeast corner where runoff not captured in the ditch could drain onto adjacent parcels. 3. Ditch cross section for the east ditch should be provided to ensure that the ditch has adequate capacity to convey runoff without overtopping into the adjacent parcel. 4. The existing driveway on Lake Drive must be shown as being removed. 5. Applicant is required to provide proof of NPDES permit prior to commencing with grading. Storm Water 1. Soil borings should be completed near the proposed infiltration basin to verify presence of sand soils and groundwater elevations at the proposed facility. 2. The configuration of the drainage system with the SAFL Baffles and Prinsco systems may not be effective. Rather than having parallel lines, it seems that the Prinsco systems could be increased in size and offer greater benefit. 3. Access ports for the Prinsco systems should be indicated on plans. 4. An operation, inspection, and maintenance agreement should be completed that indicates the land owner is responsible for the stormwater facilities. 5. The applicant may wish to specify the invert of the Prinsco system as the inlet pipe invert to avoid confusion during construction. 6. The applicant is advised that the Prinsco system may be difficult to maintain as currently configured. It is recommended that sump manholes be placed within the systems' • •