04-15-1996 Planning Packet - Laserfiche WebLink

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Zoning File #2130 April 10, 1996 Page 4 Staff was also concerned with the potential for erosion in the ditches along Wildhurst Trail as a result of both sewer and road construction. Gustafson recommends in stallin g the plat road as an urban section with curb and moving the catch basin and drainage pipes further east to the intersection of Wildhurst Trail. Drainage can then be directed to the detention pond and minimize flows out to Wildhurst Trail. Grading/Drainage Gusta&on advises that the grading plan and pond detail do not match. The pond would require up to a 20' excavation if constructed in the wooded area, along with the loss of all the vegetation and plantings in area. The developer may be advised to work with property owner to the immediate south so that a pond can be constructed closer to the existing culverts and existing municipal facilities at Wildhurst Trail. The grading plan must include a proposed ditch along Wildhurst Trail and type of erosion control to be used both during construction and after work is completed until ground cover is not restored. Grading activities are shown to the southeast of ravine at north of property within Lot 3. There can be no filling or excavations within the ravine. The City will protect this area of ravine with a conservation and flowage easement. Drainage and ponding calculations have yet to be provided. Detail on outlet structure should include invert elevations for all pipes and show the normal high water level and 100-year flood level. The utility easement extending from the cul-de-sac to Garden Lane must be widened to 30' and, as required by Code, drainage easements be shown over all drainageways and ponding areas. If the developer is able to install a comprehensive drainage plan that would mclude the property to the southeast, the owners would also be asked to grant drainage easements over their property. Park Commission Recommendation There was discussion at the Park Commission's meeting concerning a desire to have a trail that would connect from the plat road through Lot 4 to Garden Lane and eventually to a future park to the west and north (refer to the Exhibit M). If the plat road is to be a private road, the public has no right »o drive or trespass over the roadway. The Park Commission recommended that a trail easement be placed adjacent to the utility easement that divides Lot 4. If the easement was put on the north side of the sewer utility easement, it would have no impact on Lot 4's building envelope. The building envelope must maintain a minimum of one-half acre not divided or encroached by pedestrian or vehicular easements. i i n H||tinyiiia-girr