Pine Lake 15-0149-00 Lake Water Quality

Pine Lake is located 3 miles west of Clearbrook, MN in Clearwater County. It is a large shallow lake, with a surface area of 1,238 acres with a maximum depth of 15 ft. Pine Lake has three inlets and one outlet, which classifies it as a drainage lake (Figure 1). One stream inlet, located along the southeast shore, flows from the outlet of Little Pine Lake. A second inlet, the Lost River, flows into Pine Lake along the southwest shore and a small, intermittent creek inlet is located along the northwest shore. The outlet (Lost River) is located near the middle of the north shore. The river takes a northern path out of the lake, eventually turning west before it meets up with the Clearwater River 9 miles east of Red Lake Falls. Water quality data have been collected on Pine Lake in 1989, 1990-1992, 2007-2010 (Tables 2-3). These data show that the lake is at the mesotrophic/eutrophic border (TSI 49-51), which characteristically has moderately clear water most of the summer and abundant aquatic plant growth (page 9). The Property Owners of Pine Lake Association are active in many activities, including walleye stocking, mosquito pest management, maintaining recreational areas (i.e. boat landing) and a Labor Day celebration.