From its 849,627 acres, the Lower Boise watershed has about 501,799 acres in agricultural use (59% of the watershed). These encompass 291,503 acres as grass/pasture (34%) and 210,296 acres as crops (25%). From the 501,799 agricultural acres, 239,711 acres are irrigated (28%) in the watershed (USDA, 2018a and IDWR, 2018a). See Irrigated area layer in the map. See graph 1 on % of land Uses in the lower Boise
The most important crops in terms of acreage in the watershed are (excluding grass/pastures): Alfalfa (62,249 acres), corn (42,488 acres), winter wheat (26,795 acres), sugar beet (10,705 acres), onions (10,535 acres), dry beans (10,513 acres) and herbs (7,142 acres) (see graph). Activate herbs/mint layer in the map to see distribution of that crop in the Lower Boise and See Image of geographic distribution of Land uses in the Lower Boise watershed.
The operating agent that delivers approximately 85% of the water stored in the reservoir system to farmers in the Treasure valley is called the Boise project Board of control (BPBC, 2018). BPBC serves 5 irrigation districts: Boise-Kuna, Big Bend, Nampa and Meridian, New York and Wilder irrigation districts (See irrigation districs in the map layers menu). The Boise project furnishes about 224,000 acres in total and in the Lower Boise watershed, diverts water into the New York and Mora Canals through the Boise river diversion dam, furnishing about 167,000 acres in total.