A water main break along Diamond Drive at the entrance of Pueblo Complex has caused the northbound right lane to be closed through the weekend. Crews are continuing to repair the damaged section. Please use caution.
Published on September 17, 2026
Los Alamos, New Mexico—DPU crews are on scene and working to fix the break. Currently, the northbound right lane is closed on Diamond Drive. Please watch for workers as they are actively dealing with the water line break. Current estimate is at least 24 hours to complete the repairs. More details will be provided as the crews get a better assessment of the situation.
Update, as of 2:30 p.m. on Thursday, Sept. 17: crews have isolated and temporarily stopped the leak. Beginning at 7 a.m. on Friday, Sept. 18, crews will repair the water transmission pipe. Work is expected to last until the end of day Friday. Please use caution if commuting through the area. There is no impact to customer water supply with this leak and repair.
###
About Los Alamos County Around 19,000 residents strong, we are two communities in one County—Los Alamos townsite and White Rock. We are home to world-renowned Los Alamos National Laboratory, three national parks, 200+ miles of trails, and a wonderful quality of life on the breath-taking Pajarito Plateau.
Los Alamos County | 1000 Central Avenue | Los Alamos, NM 87544 | LosAlamosNM.gov
Dave Krueger Public Information Officer david.krueger@losalamosnm.gov 505-709-8659