There is one primary stream within the subwatershed: Six Mile Creek, which flows to Halsteds Bay. Several other small streams and channels provide drainage and local conveyance within the subwatershed. The creek was channelized as Judicial Ditch #2 in 1905 (see the following section). Six Mile Creek is included in the District’s Annual Hydrologic Data monitoring program, and was also studied in-depth in 2004 as part of the District’s Upper Watershed Stream Assessment. There are no known storm sewer outfalls to the creek, mainly due to minimal near stream development. There are 5 bridge crossings, and some culvert crossings, which are mainly park trail, and path crossings.
The creek flows through several large wetlands prior to discharging to Halsteds Bay. The Stream Assessment identified eight erosion sites and only a few sites with debris in the channel. The erosion was mainly localized streambank sloughing.
Water quality and flow in the creek is monitored at two locations. Six Mile Creek carries a significant phosphorus and sediment load to Lake Minnetonka at Halsteds Bay. Phosphorus loads are generally low at Lunsten Lake but substantially increase near Parley and Mud Lake downstream. Six Mile Marsh is a likely source of phosphorus loads to Halsteds Bay. Dissolved oxygen within the stream in the summer months falls below the 5 mg/L State of Minnesota standard for class 2B waters. E. coli bacteria were monitored in Six Mile Creek in 2004; counts did not exceed state standards.