Near Boise in Ada County, Idaho — The American West (Mountains)

Arrowrock Dam

Photographed by Rebecca Maxwell, September 20, 2009

1. Arrowrock Dam Marker

Inscription.
Higher than any other dam from 1915 until 1934, Arrowrock Dam still is an essential part of Boise Valley's irrigation system.

Located six miles upstream from here, Arrowrock is 350 feet high and 1,150 feet wide. Built at a cost of $4,725,000 to provide additional water storage to get 2,635 valley farms through dry summer seasons, it had enough extra capacity to take care of more than 1,000 new farms as well. Its 18-mile canyon reservoir holds 280,000 acre feet of water.

Erected by Idaho Historical Society. (Marker Number 376.)

Topics and series. This historical marker is listed in these topic lists: Agriculture • Industry & Commerce • Natural Resources • Waterways & Vessels. In addition, it is included in the Idaho State Historical Society series list. A significant historical year for this entry is 1915.

Location. 43° 35.464′ N, 115° 59.922′ W. Marker is near Boise, Idaho, in Ada County. It is on State Highway 21 at milepost 17, 0.2 miles south of Arrowrock Road, on the right when traveling north. Touch for map. Marker is in this post office area: Boise ID 83716, United States of America. Touch for directions.

Regionally, this marker is on Idaho’s Snake River Plain.

It is also in the American Mountain West.

Globally, it is in North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Other nearby markers. At least 8 other markers are within 6 miles of this marker, measured as the crow flies: More's Creek (here, next to this marker); The Old Toll Road (approx.

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2½ miles away); a different marker also named Arrowrock Dam (approx. 3.9 miles away); The Foote Legacy in Idaho (approx. 5.6 miles away); Beaver Dick's Ferry (approx. 5.7 miles away); The Oregon Trail (approx. 5.7 miles away); Diversion Dam (approx. 5.9 miles away); a different marker also named Diversion Dam (approx. 6 miles away). Touch for a list and map of all markers in Boise.

More's Creek/Arrowrock Dam Markers Along Hwy 21 image. Click for full size.

Photographed by Rebecca Maxwell, September 20, 2009

2. More's Creek/Arrowrock Dam Markers Along Hwy 21

Credits. This page was last revised on August 19, 2020. It was originally submitted on September 20, 2009, by Rebecca Maxwell of Boise, Idaho. This page has been viewed 2,063 times since then and 55 times this year. Photos: 1, 2. submitted on September 20, 2009, by Rebecca Maxwell of Boise, Idaho. • Craig Swain was the editor who published this page.