The Clark Fork Coalition is currently working with the irrigation districts on Lost Horse Creek to monitor flows in the ditches to better understand the water balance on the creek. We are also conducting synoptic flow studies on 3 of the major ditches to assess seepage losses. CFC is also working with Hydrometrics on a feasibility study to determine if raising the dams on Twin Lakes is a viable option for increasing headwater storage to boost late season low flows. This effort has involved extensive data collection on both lakes, including flow monitoring on the outlets, bathymetric surveys of the lakes, and topographic surveys of the surrounding areas.