09-25-2000 Council Packet - Laserfiche WebLink

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required for the three lots that front on Wildhurst as they do not meet the minimum 140' lot width all new lots in the LR-IB zoning district require. It would be contrary to the City of Orono s Comprehensive Plan and practice to grant variances to create lots that do not meet the minimum requirements in the Code. Review Comments 1. 2. Drainage/Grading Plan. There are two major drainagewaysv/ithin the property. There is a major ravine that intersects the north end of the property, in the proposed Natural Area and (Please refer to the Site Plan attached as Exhibit C). The City will require a drainage easement over this ravine. A major portion of this property drains to the south and east to a less dramatic ravine area that drains under Wildhurst Trail and eventually to the lake. There is concern about erosion on the east side of Wildhurst Trail due to stormwater flows, and the neighboring property owner west of Wildhurst has, constructed a minimal ponding area to reduce the flow rates which were threatening the driveway access. Stormwater calculations should be submitted for review to ensure additional hardcover in the development will not further increase flow rates. Additionally, private driveway accesses are proposed on Wildhurst Trail. There is no indication how the stormwater will be directed and treated prior to crossing Wildhurst. There is a high potential for erosion. City Staff is concerned about any new access to Wildhurst Trail. It is the recommendation of Staff all access for the development is via a new road constructed by the developer through Garden Lane with a cul-de-sac serving any lots within direct access. The topography favors access from Tonkaview. On-site grading and drainage plans must be submitted to the Minnehaha Creek Watershed District for their review at the time the preliminary plan is submitted to the City. The MCWD will review the plans only after receiving preliminary approval from the City. Grading plans submitted with the formal application must include existing and proposed 2’ contours. The plans must also include erosion control, building pad locations and elevation and temporary erosion control during construction. Staff Recommendation Regarding Property Access. Earlier proposals on this site indicated access to the property via Garden Lane. Staff does not support direct access for the lots to Wildhurst. There are concerns with additional driveways being located on the road when alternative access is available through Garden Lane. Locating the driveways directly onto Wildhurst Trail would not allow stormwater to be treated. The City of Orono will require stormwater ponding that can be treated with aNURP pond being constructed to treat additional run off from the street and within the development. Attached to this report is a proposed lot layout from a preliminary plat application for this property in 1997. TTie lots were proposed to all have access from a road built in Garden Lane W2S76 Brenshetl Homes 1181 Wildhurst Trail Sketch Plan Review of a 4 tot subdivision April 17. 2000 page-2