The Muskingum River navigation hand-operated lock system was recently designated a National Historic Civil Engineering Landmark by the American Society of Civil Engineers. A public ceremony on July 23, 2001 formally marked the landmark designation at the McConnelsville launch ramp. The Muskingum River and its navigational system played a major role in the economic development of the Ohio River Valley. Commerical shipping flourished on the river for 70 years, but was replaced by rail and motorized transportation at the turn of the century. The Ohio Department of Natural Resources operates and maintains the river's 150-yar-old system of locks and dams, the oldest of its kind in the country, as part of the Muskingum River Parkway.