05-10-1999 Council Packet - Laserfiche WebLink

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Carriage Hill Lane shall be platted at a 50' right-of-way with a payed width of 24'. The length of the private road is approximately 350' from Willow Drive South to the center of the cul-de-sac in conformance with the subdivision requirements. STORMWATER MANAGEMENT The subdivider has proposed a NURP pond in the comer of Lot 5. The proposed location of the NURP pond is too close to the property line. It should be at least 55' from the property line so that a septic site on the adjacent property could be located 20' from the property line without requiring a variance. Allowing the NURP pond to be located on or adjacent to the property line impacts the adjacent property's ability to locate a septic site in the future. The NURP pond is also too close to the septic sites for Lot 5 and does not have an adequate bench of 10:1. Septic sites are required to be at least 75' from a wetland or pond. The City Engineer has recommended that the storm sewer be constructed to route storm flows from the street to the pond. All storm pipes are recommended to be reinforced concrete pipes instead of corrugated metal pipes. The pond needs to have an outlet structure that provides 1' of skimming to remove floatables and debris. Permanent erosion control should be installed downstream from the pond to prevent sedimentation into French Lake. SEPTIC SYSTEMS The parcel is not within the MUSA line. The Crystal Bay sewer project is to the south of the proposed subdivision. The Webber Hills sanitary sewer project is proposed for the area to the north of this subdivision. On-site septic systems are proposed for this development. The septic sites are required to be 75' from the wetlands and NURP pond and at least 20' from property lines and hardcover. Staff has not been able to verify the septic information because the ground is still frozen. Fhis preliminary plat shall not move forward until Steve Weckman, On-Site Septic Systems Manager, has been able to approve each proposed primary and secondary site. Any site that does not meet the City's requirements may require that the preliminary plat and proposed lots lines and ponding area be revised. • • DEDICATIONS The subdivider shall be required to dedicate 33' of right-of-way for Brown Road (County Road 146) and 66' of right-of-way for Willow Drive. This will leave Outlot A separated from the proposed #2467 Bohland Development Class 111 Subdivision PC-3/15/99 page—6