02-12-2015 Planning Comm. Minutes

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MINUTES PLANNING COMMISSION FEBRUARY 12, 2015 12,275 square feet of area. The Planner noted that the platting of property resulting in three lots or more have larger minimum standards of 85 feet of lot width and 11,000 square feet of area. The Planner noted that the property would continue to maintain a significant amount of slope from LaBore Road, and a retaining wall is proposed on the westerly lot on both sides of the proposed structure. This wall is necessary to accommodate access to the garage due to the steep grades. The Planner noted that under the Subdivision Code the City can consider whether the necessity for significant retaining walls such as this can affect the reasonableness of the subdivision. The Planner reported that the primary concern relative to this proposed subdivision is storm water and how it will affect the neighboring property to the south. He indicated that the lot sizes as proposed under the proposed subdivision meet R-1 District requirements. The Planner recommended approval of the subdivision as proposed subject to the City Engineer's comments and recommendations relative to storm water controls and the grading plan for the property. The City Engineer reviewed his February 6, 2015 report outlining his review of the Storm Water Management, Erosion Control and Utility Plan that was submitted for this property. The City Engineer indicated that while the storm water treatment plan proposed meets standard requirements, his concern is where water will go when leaving the storm water pond. He also pointed out that he is recommending that the storm water calculations be revised and resubmitted based on the comments in his report including the use of the new Atlas 14 rainfall events. He noted that currently storm water runoff drains south onto private property and pointed out that the development plan as submitted does not change this condition. The Engineer noted the new development will result in more impervious surface. However, under the new plan discharge rates are maintained or lowered for the proposed conditions of a 2 -year, 10 -year, and 100 -year event. During smaller rain events, the overall volume of water discharged from the site will be lowered. During large rain events, the discharge volume will increase, which could adversely affect the property owner to the south. The City Engineer stated that he has concerns relative to the discharge of storm water onto the private property to the south without an improved means of conveyance to a public right- of-way or easement. He indicated that his recommendation would be that the applicant be directed to work with the adjacent property owner to ensure storm water conveyance does not negatively impact 715 Keller Parkway. With regard to the proposed storm water ponds, the City Engineer indicated that there should be cross easements for these ponds as well as a maintenance agreement put in place. The City Engineer -2-