IDWR Linear Administrative Basins

IDWR has divided the state into over 50 administrative basins in order to coordinate water management activities. Most of these basins are represented with polygons (found here), but the Snake River constitutes a large enough resource that it is separated into basins of its own, each represented by a line. Basin 1 corresponds to that portion of the Snake River from the Wyoming border to Milner Dam. Basin 2 represents Milner Dam to where the Snake River leaves Idaho into Oregon. Basin 3 stretches from where the Snake re-enters Idaho to where it leaves the state at Lewiston.