This data release includes output data from the transit-loss accounting program for the Fountain and Monument Creek watersheds in El Paso and Pueblo Counties, Colorado. The output data distinguish between native and reusable streamflow. Native streamflow is that which originates naturally within the watershed. Reusable streamflow originates as water imported from outside the watershed, water derived from pumping of certain groundwaters, or as other water with rights that allow it to be reused. The program accounts for reusable water throughout the watershed, as well as the total inflow and outflow of water to each subreach division within the watershed. The accounting program is based upon stream-aquifer models of the watershed and determines water losses and gains from the surrounding alluvial aquifer during transit, calculating the total amount of daily reusable return flow reaching the Arkansas River at the mouth of Fountain Creek. Output included here spans three iterations of the transit-loss accounting program with differing numbers of subreaches and output nomenclature references to reusable waters.