Sam Ziemann From - Region of Waterloo

HYDROGEOLOGICAL ASSESSMENTSTRANGE STREET WATER SUPPLY CLASS EA UPDATEREGIONAL MUNICIPALITY OF WATERLOO2.0 Background Review2.1 PHYSIOGRAPHY AND TOPOGRAPHYThe Strange Street Well Field is located along the eastern flank of the physiographic regionreferred to by Chapman and Putnam (1984) as the Waterloo Moraine. The Moraine is orientedin a north south direction with ground surface topography decreasing from a high of over400 metres (m) above mean sea level (AMSL) within the core areas of the Waterloo Morainenear St. Agatha, to a low of approximately 300 m AMSL at the Grand River. Locally, within thevicinity of the Strange Street Well Field, the ground surface topography ranges fromapproximately 370 m AMSL to 340 m AMSL (Figure 2) with a general slope to the east.2.2 SURFACE WATER FEATURES AND ENVIRONMENTAL AREASThe topographic high, corresponding to the core of the Waterloo Moraine, creates a regionalsurface water divide that diverts surface water to the Nith River in the west and the Grand Riverin the east. Locally, a topographic divide exists to the south of the Strange Street Well Fieldwith surface water flow on the northern portion of the divide draining to Maple Hills Creek whichis part of Laurel Creek (Figure 2). To the south of the divide, surface water flow is towards theHenry Sturm and Detweiler Greenways that are part of the Upper Schneider Creek Watershed(Figure 2).Maple Hills Creek flows to the north where it joins with Clair Creek near Waterloo Park. Thedrainage basin for Maple Hills Creek has been developed for residential use, and as a resulthas been altered to some degree, particularly for the older development areas (Figure 2). Thecreeks to the south of the divide have been substantially altered to allow for urban drainagewithin the development areas. The Henry Sturm Greenway has been channelized through theconstruction of concrete lined urban drainage channels (Figure 2). Upstream ofFischer-Hallman Road, the Henry Sturm Greenway has been incorporated into a morenaturalized setting, with riparian vegetation and buffers. The Detweiler Greenway is a tributaryto the Sandrock Greenway, and runs parallel to Highland Road (Figure 2). The DetweilerGreenway has been incorporated into a naturalized corridor upstream of Highland Road.Several on-line stormwater management facilities exist along Detweiler Greenway for waterquality control, and to mitigate downstream flooding impacts.Locally, there are no Areas of National and Scientific Interest (ANSI), Environmentally SensitivePolicy Areas (ESPA), or provincially significant wetlands within the Study Area.2.3 GEOLOGY AND HYDROGEOLOGYThe Quaternary geology of the Study Area has been studied extensively and is discussed byKarrow (1993). The Waterloo Moraine is a kame moraine formed during an interlobate positionbetween ice lobes extending from the Ontario-Erie, Huron, and Georgian Bay Basins. Ahls v:\01609\active\161110897_strange_st\planning\report\final hydrogeo assessment\final\fnl_rpt_120319.docx 2.1