Near Boise in Ada County, Idaho — The American West (Mountains)
The New York Canal Project was begun in 1882. It was not completed for eighteen years and when it was finally opened in 1900, its volume was only 300 cfs (cubic feet per second). As originally planned, volume would have feen 4500 cfs. In 1904, the U.S, Reclamation Service (now Bureau of Reclamation), took control of the project. The canal was rebuilt, lined with concrete, and a reservoir and head gate were added.
The Diversion Dam complex was opened in 1909, but that year the drought was so severe that the reservoir was inadequate. As a result, the Arrowrock Dam was begun, 17 miles upriver. The gravel pit behind you was what they used to build Arrowrock. Diversion Dam was built from a series of excavations that you can see about a quarter mile west of the dam site.
To move gravel from the Diversion Dam pit to the Arrowrock site, the government built and operated The Boise & Arrowrock Railroad from 1911 through 1915. It was abandoned in 1916 and became a part of the Intermountain Railway which operated until 1935.
Erected by Ada County Centennial Committee.
Location. 43° 32.298′ N, 116° 5.562′ W. Marker is near Boise, Idaho, in Ada County. Marker is at the intersection of State Highway 21 and East Warm Springs Avenue, on the right when traveling east on State Highway 21. Touch for map. Marker is in this post office area: Boise ID 83716, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. A different marker also named Diversion Dam (within shouting distance of this marker); Fort Boise (approx. 0.9 miles away); Kelton Road (approx. 0.9 miles away); Idaho's Emigrant Trails (approx. 0.9 miles away); Ezra Meeker (approx. 0.9 miles away); Bonneville Point (approx. 0.9 miles away); The Oregon Trail (approx. 0.9 miles away); Beaver Dick's Ferry (approx. 0.9 miles away). Touch for a list and map of all markers in Boise.
Categories. • Man-Made Features •
Credits. This page was last revised on June 20, 2018. This page originally submitted on June 20, 2018, by Barry Swackhamer of San Jose, California. This page has been viewed 46 times since then. Photos: 1, 2, 3. submitted on June 20, 2018, by Barry Swackhamer of San Jose, California.