The Chadakoin River is Jamestown's original economic engine. All are welcome to learn about the changes over the past 200 years along the river during the debut walking tour on Saturday at 1 p.m. starting at the Fenton History Center, 67 Washington St., Jamestown. The tour will be along the Chadakoin River near Brooklyn Square. Walkers will learn about the power plant, the woolen mills, the railroad, the sawmills and the people who made it happen. Joni Blackman, Fenton History Center director, will lead the tour. The tour will begin and end at the Fenton History Center parking lot. The tour is approximately 1 1/2 hours long. The fee is $10 for potential members and $5 for Fenton History Center members. The other tours offered through the summer are of the "Old Northside" (now the downtown area), "Lakeview Avenue" and "Hidden Alleys." Children up to age 18 are free with a paying adult; there is a limit of two children per adult. Tours are offered each Saturday afternoon through the end of September. For more information, visit www.fentonhistorycenter.org or call 664-6256.