There is one primary stream within the subwatershed: Gleason Creek, which serves as the outlet of Gleason Lake and flows to Glenbrook Pond in Wayzata, which is discharged by storm sewer into Wayzata Bay of Lake Minnetonka. Portions of the creek were channelized as County Ditch #32 at some unknown past date. Gleason 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. Flow in the creek is controlled by an outlet weir on Gleason Lake and is mainly runoff event-driven. Eleven storm sewer outfalls discharge into the creek. The creek flows through five culverts at the US Highway 12/TH 101 interchange. Several spot erosion sites were identified.
Water quality in the creek is variable and is dependant on flow. Especially during wetter years when erosive flow velocities may occur, Gleason Creek can convey significant total phosphorus (TP) and total suspended sediment (TSS) loads from Gleason Lake to Glenbrook Pond. Dissolved oxygen within the stream is highly dependant on flow, and at low flows falls below the 5 mg/L State of Minnesota standard for class 2B waters.