CUP 02076 - Laserfiche WebLink

Home Browse Search

EXISTING TOPOGRAPHY AND NATURAL FEATURES The neighborhood topography is important to understand as it has helped to limit north-south roadway connections. The topography also has helped establish the current pattern of land use. The topography of the neighborhood varies significantly. Areas along Rimrock Road are relatively flat in comparison to areas of the neighborhood further west. Commercial lands fronting the Beltline Frontage are perched atop a hill with a significant slope transitioning to the residential areas and Southdale Park to the south. The trail connection in this area is challenged by a series of switchbacks. A similar transition occurs at the rear of the large single family residential lots which front Oregon Road/CTH MM. The single family lots to the east along Clausen Road are significantly higher than those along Oregon Road/ CTH M.iVI. The remaining portions of the neighborhood along Ski Lane, Deer Valley and Pheasant Ridge Trail are relatively flat. The area currently under development as part of the Novation Campus and extending south to the area near Lake George Road was used for licensed and unlicensed landfills. Construction debris and fly ash were hauled into these landfills. The 'W.'isconsin Department of Natural Resources (WDNR) has indicated that capping these landfills will be required. Landfill areas containing fly ash must be capped utilizing one of three methods: buried under parking lots, buried under buildings, or capped with an impermeable clay liner. For this reason, stormwater infiltration will not be possible on lands which contain fly ash. Two man-made retention basins have been identified within the neighborhood. The first is located west of the intersection of Rimrock Road and 1.-'loorland Road. The second, known as Lake George, was created sometime in the 1960s as a stormwater management basin. Due to the nature of how and why these basins were created, 'W'DNR has indicated that these areas can be enhanced and continue to serve as stormwater management areas. -m EXISTING STORMWATER SYSTEM Because of the neighborhood's topography, stormwater drains from the neighborhood in t:\.Vo separate directions. The dividing line is a north-south ridgeline located just east of the existing railroad, continuing just south of Maloney Drive, where it turns east, intersecting with Rimrock Road. Surface run-off in the corridor to the west of this ridgeline (referred to as Area I) flows in a southwestern direction toward USH 14. Area I can be further divided by a minor ridgeline resulting from fill along the existing rail corridor. This barrier further defines sub-watersheds Area LA and Area IB, located to the east and west of the rail corridor, respectively. Surface run-off in Area IA flows south from a high point located along the northern boundary and continues to a drainage swale located along USH 14. Area IB follows a similar pattern toward USH 14, where it is collected and conveyed through a drainage swale, eventually discharging into the natural system as part of the Nine Springs E-,\\'ay. The eastern corridor (referred to as Area II) has a general flow direction from west to east. i\Iuch like Area I, this drainage corridor can be broken down further by a minor ridgeline in the northeastern portion of the neighborhood. This ridgeline divides Area II into a southern (Area IIA) and northern (Area lIB) sub-watershed. A majority of the surface run-off in Area IIA flows from the major ridgeline and is detained in the existing stormwater pond adjacent to Rimrock Road. The remaining volume of run-off, along with overflow from the existing basin is carried north through a drainage swale where it is taken to wetlands located north of the Beleline. Stormwater in Area lIB has an eastern flow and is handled through a management net:\.Vork similar to Area 11.,\. An existing pond near the center of this area detains a majority of run-off, prior to releasing it to a drainage swale and carrying it to the off-site management system located along the east frontage of Rimrock Road. SOUTH DALE NEIGHBORHOOD PLAN_