Historical Marker · No. 343

Diversion Dam

Ada County · Idaho

The quarter century of failure began with Arthur De Wint Foote, an engineer who surveyed the valley from 1883 and planned a 75-mile canal with some 5,000 miles of laterals to water half a million acres; it was named the New York Canal for the eastern investors, and the financial panic of 1884 ruined them. Foote and his wife, the writer and illustrator Mary Hallock Foote, lived in a lava-stone house in the canyon near here. Her letters from those years became the basis of Wallace Stegner's Pulitzer Prize-winning novel Angle of Repose.

What the plaque says

Diversion Dam Was completed in 1909 to lift water into an already constructed New York Canal system, greatly expanding its irrigated farmlands. After a quarter century of failure to dig a large canal above Diversion Dam, United States Reclamation Service funding enabled a group of Boise Valley irrigation districts to complete this project. Then in 1912, a generating plant was installed to provide power to construct Arrowrock Dam. It has been preserved as an historical display by Bureau of Reclamation staff. 343 Text prepared by the Idaho Historical Society Marker made & installed by Idaho Transportation Department

Where it stands

43.53894, -116.09278 · Directions

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