Protect Laboratory facilities and infrastructure Los Alamos and Pueblo Canyons Construction continues today on the low-head weir in lower Los Alamos Canyon, near the intersection with State Road 4. Progress has been slowed somewhat in Los Alamos Canyon due to large rocks being encountered in the channel. Corps teams are completing the design for the weir in Pueblo Canyon. The weirs will be low walls, constructed of rock gabions that will stretch across the canyon channels and will act to dissipate flow and trap sediment in the event of flooding. The Army Corps team at the Los Alamos Reservoir has completed installation of most of the articulated concrete mats, concrete blankets designed to reinforce the structure.
Crews continue to apply shotcrete to the downstream embankment.
Shotcrete is sprayed, liquid concrete designed to provide erosion protection and prevent water from penetrating the surface. Today, crews continue to dig the batch plant foundation, construct portions of the plant and stockpile concrete materials. The goal of the concrete structure is to allow a normal flow of runoff down Pajarito Canyon, but prevent significant flooding downstream. The structure is designed so that water will not remain pooled for more than 96 hours. The wall is designed to prevent debris from hitting Kiva One, one of the nuclear facilities at TA-18.