This planning report/draft environmental statement analyzes a Preferred Plan to irrigate 4,068 acres along the Big Horn River in northcentral Wyoming. The land is presently public-owned, administered by the Bureau of Land Management. The report also analyzes the situation which would prevail in the area in the No Action Alternative. The Preferred Plan would cost about 3,880 dollars an acre to construct (which the State of Wyoming would fund), along with annual operations, maintenance and replacement costs of 29 dollars an acre. The Preferred Plan would return benefits of 221 dollars per acre (using State economic criteria).