02/11/2004 P&Z Packet - Laserfiche WebLink

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Marshan Estates Page 2 February 4, 2004 City of Lino Lakes, Minnesota 2. The Preliminary Plat does show drainage and utility easements around the platted properties per City of Lino Lakes standards. This includes 5 -foot easements along all side property lines and 10 foot easements across the front and rear of all properties. A drainage easement is also provided adjacent to County Ditch 10 on the south boundary of the plat. Sanitary Sewer and Water 1. Plans for extending sanitary sewer and water to Marshan Lane have been initiated by the City and are therefore not included as part of the plans submitted by the Developer. However, comments are being provided herein to address specific issues related to the Developer's submittal. 2. The closest available utilities are 10 -inch diameter water and 12 -inch diameter sanitary sewer mains at Town Center Parkway, a distance of less than 400 feet north of Marshan Lane. It is proposed to connect directly to the existing facilities by extending mains southwesterly along the east side of Lake Drive to Marshan Lane, and further extending mains easterly to the end of Marshan Lane. 3. For the watermain, it is proposed to extend 12 -inch diameter pipe along Lake Drive in accordance with the City's Comprehensive Plan. The 12 -inch main would then terminate at Marshan Lane, a 12 -inch stub to the south to be provided for a future connection, and 8 -inch main then extended easterly to the end of Marshan Lane. Individual services would then be provided for the individual parcels along Marshan Lane (for both existing and proposed single family units). 4. For the sanitary sewer, it is proposed to extend PVC sewer pipe to Marshan Lane in a similar fashion. The size of the sewer main has not yet been firmly determined, and can be further explained as follows: • The depth of the sanitary sewer at Town Center Parkway is approximately 19 feet deep. However, the ground elevation drops as much as 11 feet from Town Center Parkway to the end of Marshan Lane, thus raising concerns regarding the depth/cover and invert elevation of the main by the time it reaches the termination point (a total distance of approximately 1100 feet). For the majority of properties on Marshan Lane (including the three proposed new units on the south side of Marshan Lane), gravity flow from the homes to the sewer does not appear to be a concern. However, the three existing units along the south and east sides of Marshan Court are situated at lower elevations, and the lowest floors of these three properties cannot be served sanitary sewer by gravity. Preliminary design of the sanitary sewer places the invert of the sewer at an elevation of 890.5 (plus or minus) at its termination at Marshan Court and the end of Marshan Lane. The low floor elevations of the three properties are as follows: 580 Marshan Lane - 888.97 590 Marshan Lane - 888.78 600 Marshan Lane - 889.01 Therefore, an ejector or lift would be required to service the lowest floors of these three properties.