Entellus was selected to perform hydrologic and hydraulic analyses to mitigate potential damage to the solar facility built on the Air Force base. Our solution included on-site channel modifications, like connecting to a nearby channel, that exceeded both the City of Tucson and the U.S. Department of Defense’s design standards. Additionally, we determined flows for the Davis-Monthan Channel, and the adjacent Tucson Diversion Channel, whose drainage area included the 309th Aerospace Maintenance and Regeneration Group (309 AMARG), housing developments, and shopping centers. We utilized HEC-RAS to demonstrate our compliance with drainage standards and freeboard requirements – resulting in a final design that would eliminate the scour and damage to the solar facility and provide an outfall for the Davis-Monthan Channel.