(December 17, 2015, 2:31 PM EST) -- HELENA, Mont. — The Montana Supreme Court on Dec. 15 reversed a state Water Court ruling that affirmed water right claims by the Teton Co-Op Canal Co. to the Eureka Reservoir and ordered the lower court to assign a new priority date (Teton Co-Op Canal Co. v. Teton Coop Reservoir Co., et al., No. DA 15-136, Mont. Sup.; 2015 Mont. LEXIS 604)....