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Enjoy life on the lake, be safe, and be a good neighbor.

Please be aware of invasive species and COLA's Clean Boat Initiative

Read the attached brochures and make sure you are familiar with Wisconsin Boating Regulations.

LCO Water Level

Volunteers regularly monitor the depth gauge at the Thoroughfare bridge. The gauge and the chart readings are in tenths of a foot (1/10 foot = 1.2 inches). The first point on the chart, June 27, 2017, was when the gauge was first installed. The USGS “normal” water surface elevation for big LCO is 1287 feet and is represented by the lower orange line.

The Ordinary High Water Mark (OHWM) is represented by the upper orange line. The OHWM establishes the boundary between public lakebed and private land, was established for big LCO in 1955 and is 1289.27 feet above mean sea level. The OHWM is “the point on the bank or shore up to which the presence and action of the water is so continuous as to leave a distinct mark either by erosion, destruction of terrestrial vegetation or other easily recognized characteristic.”

Periodic readings are recorded as accurately as reasonable. The water itself is in perpetual motion, not only flowing downstream but rising and falling due to waves, the current in the channel, the wind which can actually push water and “stack” it toward one end of the lake or the other and the seiche effect caused by the gravitational pull of the moon and sun. 

LCO Depth Gauge Readings.jpg


Issue 22  'Lac Courte Oreilles Boat Landings'