Mill Creek & the Grand River Watershed

Mill Creek originates in the uplands and woodlands/wetlands of Puslinch Township, flowing south-west through the Township and the City of Cambridge, where it joins the Grand River. The upland moraine landform and the extensive Class 1 wetlands that border the creek provide important rainfall and melt-water retention and infiltration. This infiltration not only provides an important source of groundwater recharge, but also an excellent source of water that sustains Mill Creek, even in relatively dry periods. This discharge of good quality and cold temperature water supports a cold-water fishery in some reaches of the creek.

The Mill Creek landform and wetland features are characteristic of the Middle Reach of the Grand River. As a result, Middle Reach streams and creeks, including Mill Creek, have a positive effect on downstream water quality in the Grand River.

Figure 1: Mill Creek Subwatershed

Mill Creek Subwatershed Reprinted courtesy of the Grand River Conservation Authority. © Copyright, Grand River Conservation Authority 2009. This map is for illustrative purposes only. The Grand River Conservation Authority takes no responsibility for, nor guarantees, the accuracy of the information contained on this map. Any interpretations or conclusions drawn from this map are the sole responsibility of the user. Produced using information provided by the Ministry of Natural Resources, Copyright © Queen’s Printer, 2009.