From The Mountain Mail (Jessica Wierzbinski):
Proposed structures include an infiltration basin on the Frantz Ditch near U.S. 285 and three water level and/or flow measurement systems. The measurement systems would be installed on Gas Creek Ditch, at Willowdale Ditch headgate on Chalk Creek and on the Pioneer Ditch in Mesa Antero subdivision. The structures are required to allow Pueblo West to use water rights from the Hill Ranch. Pueblo West bought the rights in 2001 from Western Water Rights, LLP who acquired them from Hill Ranch owners in 1986. Commissioners directed Chaffee County personnel to review 1041 regulations to determine applicable requirements.
More Arkansas River basin coverage here.