Sam Ziemann From - Region of Waterloo

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HYDROGEOLOGICAL ASSESSMENTSTRANGE STREET WATER SUPPLY CLASS EA UPDATEREGIONAL MUNICIPALITY OF WATERLOO1.0 IntroductionThe Regional Municipality of Waterloo (Region) is undertaking the Strange Street Water SupplySystem Class Environmental Assessment (Class EA) Update. The primary objective of thisstudy is to update the Class EA and Preliminary Design completed by the Region in 2001, withthe first component of this study focusing on groundwater investigations. Since 2001, a varietyof work has been conducted in the Strange Street Well Field (Figure 1), including wellrehabilitation and assessment efforts, and the installation of two (2) new production wells(Production Wells K11A and K19) (Stantec, 2005; Burnside, 2007). In addition, recent work hasbeen completed by the Ontario Geological Survey (OGS) (Bajc and Shirota, 2007) and Stantec(2009) consisting of a detailed review of the hydrostratigraphy of the Waterloo Moraine andbedrock units throughout the Region, which resulted in a detailed update of thehydrostratigraphy within the Strange Street Well Field (Stantec, 2009).The Region retained Stantec Consulting Ltd. (Stantec) to complete the hydrogeologicalassessment related to the Class EA Update which was broken down into the followingobjectives:• Assess historical and current water quality data and production well performance data withinthe Strange Street Well Field supply aquifer;• Review and assess existing groundwater data to identify potential test drilling locations;• Construction of monitoring wells and test wells at up to two (2) preferred test drillinglocations; and• Performance testing and groundwater sampling of the new test well(s).This report has been organized into seven sections, including this introduction (Section 1.0).Section 2.0 provides a background summary of the well field geology and hydrogeology.Methodologies are presented in Section 3.0 with results presented in Section 4.0. Conclusionsand recommendations are presented in Sections 5.0 and 6.0, respectively with reportreferences presented in Section 7.0.All figures and tables referenced throughout the report are presented in Appendices A and B,respectively. Lotowater Technical Services Inc. (Lotowater) well performance reports areprovided in Appendix C. Technical Memorandums A1 and A2 are presented in Appendix D andE, respectively. The residential notification letter is presented in Appendix F. Test well,monitoring well logs, and water well records are presented in Appendix G. A copy of the PTTWand application package is provided in Appendix H. Appendices I though L presentAQTESOLV TM Analysis, Laboratory Certificates of Analysis, letter of compliance, and the riskassessment related to discharge water quality, respectively.hls v:\01609\active\161110897_strange_st\planning\report\final hydrogeo assessment\final\fnl_rpt_120319.docx 1.1
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
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March 2, 2011Reference: 006-189Stan
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TABLE 1REGIONAL MUNICIPALITY OF WAT
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HYDROGEOLOGICAL ASSESSMENTSTRANGE S
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July 23, 2010Lisa Lachuta, P.Eng.Pa
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Sam Ziemann From - Region of Waterloo

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