Riley Creek is located in the western metropolitan area. It begins at Lake Lucy in Chanhassen and runs through lakes, open land, urban areas and the Minnesota Valley National Wildlife Refuge before entering the Minnesota River.Riley Creek Inlet to Grass Lake, River Mile 1.3 is the main WOMP (Watershed Outlet Monitoring Program) station in the Riley Creek Watershed. It measures the water quality of Riley Creek before it enters into Grass Lake and then into the Minnesota River. Samples are collected at regular intervals for baseflow and also during storm events. This station also has automatic monitoring equipment which takes measurements every 15 minutes. This continuous data can be found under the "Time Series" dropdown in the "Data Collected" section located farther down on this webpage.