The Black Mesa Three Dam Outlet Pipe Project was conceived in 2003 to provide an outlet for Don Felipe Dam, Raymac Dam and McCoy Dam to the Rio Grande. The three dams were originally constructed to outfall to natural arroyos west of Coors and ultimately drain into the valley floor before being intercepted by the Isleta Drain. The general project concept was to extend a pipe (manifold) north and south to connect the three dam outfalls between Don Felipe and McCoy Dams. The manifold would then be connected to a pipe that ran east and west to the Rio Grande, providing a dedicated outfall to the river. The Three Dam Outlet Pipe Project was completed in summer 2021.
Following the construction completion, AMAFCA and Bernalillo County staff desired to reanalyze the mapped FEMA floodplains in and upstream of the Three Dam Outlet Project to reflect the new drainage infrastructure built as part of all phases. New drainage infrastructure that will impact the mapped floodplains include a storm drain down Maplewood Ave., a new detention pond on an unnamed arroyo near Maplewood Ave., and drainage crossings of the Gun Club Lateral that will protect the irrigation channel from overtopping if storm flows were to enter it when it is filled with irrigation water.
To review the maps and detailed analysis of the revisions, please use the links below.
For questions, please contact AMAFCA at (505) 884-2215 or by email at BlackMesaLOMR@amafca.org.