Mirroring Filling the Gap I, this report explores four water supply strategies for the Arkansas Basin — acceptable planned projects, water conservation, reuse, and voluntary water sharing with the agricultural sector. As advocates for the protection of Colorado’s rivers and natural heritage, Western Resource Advocates, Trout Unlimited, and the Colorado Environmental Coalition believe it is imperative for water planning to account for instream flow needs and to minimize the adverse environmental impacts of water supply strategies. The report offers our view of a water supply scenario that more than fills projected needs in the Urban Counties of the Arkansas Basin. Importantly, our portfolio meets future needs without new, large, costly, and environmentally damaging trans-basin diversions that have been a hallmark of traditional water supply planning.