Cone Zone Updates

Los Alamos County Public Works' staff manages the projects listed in this section through contractors. For more information, please email lacpw@lacnm.us, call (505)662-8150, or visit the "Projects/Public Works" link at https://lacnm.com/pw-projects Please slow down and use caution within the construction work zones. Please note the information below is based on schedules provided by the contractors and may change due to weather or other delays. 

Activity for the week of August 28, 2025

Performing Arts Center Parking Lot Closure

Access to the parking lot at the Performing Arts Center (PAC) building (a.k.a. "Little Theatre") at 1670 Nectar Street in Los Alamos, is closed to the public.

The closure allows a much-needed health and safety focused renovation, aimed at improving the fire safety response time in case of emergencies. The project also includes abatement of asbestos materials from the ceilings and flooring of the PAC. R & M Construction, LLC, under contract to the County, is installing a Fire Suppression System, and Southwest Hazard Control, Inc. is abating asbestos. 

The project is scheduled for completion by the end of October 2025. For more information, contact Sayeda at sobia.sayeda@lacnm.us or 505.661.2051.

The Los Alamos County Traffic and Streets Division manages the projects listed in this section. Motorists are urged to slow down and use caution in construction zones. For concerns, call Acting Traffic and Streets Manager Aaron Park at 505-662-8176.

Activity for the week of August 28, 2025

Sidewalk Closure on the West Side of Catherine Ct. for Concrete Work

Crews will be repairing sidewalks on the west side of Catherine Ct. in White Rock beginning Tuesday, Sept. 2. Work hours are 7 a.m. to 4 p.m. The sidewalk will be closed to pedestrian traffic with detours provided around the work zone. Weather permitting, this work will be completed by September 5.

Diamond Drive Pavement Marking Work

San Bar Construction Corp, under contract with Los Alamos County, will continue work on refreshing turn lane, bike lane, stop bars, and crosswalk pavement markings at various intersections along Diamond Drive. The process includes grinding out the old pavement markings before placing the new ones. This work will generally occur between 7 a.m. and 7 p.m. Monday through Thursday. Work may extend to 9 p.m. on some days and occur on Fridays to minimize impacts to traffic during busy traffic periods. Lane closures will be in place at each location during this work. Bicycle and pedestrian accommodation will be provided as needed. Motorists, bicyclists and pedestrians are advised to slow down, follow all traffic control signage, and proceed with caution through work zones. Work is scheduled to continue through September 19.

Directional Turn Arrow Painting on Side Streets along Trinity Drive

Crews will be painting directional turn arrows on streets leading on to Trinity Drive beginning Monday, August 25. Work will begin on 15th St. and continue down Trinity Drive until all intersections have been completed. Crews will temporarily close the impacted turning lane at each intersection. Work hours are 7 a.m. to 4 p.m. No closures will occur on Trinity Drive.

Los Alamos Public Schools: Crosswalk Striping

Weather permitting, the Traffic and Streets Division will continue striping crosswalks at Los Alamos Public Schools sites daily until the project is completed. Work will begin at 6:30 a.m. and end by 4 p.m. Motorists are asked to be mindful of crews and striping equipment, follow all traffic control signs, and avoid driving on freshly painted stripes.

County-owned Trails and Intersections: Vegetation Control

Crews will continue cutting vegetation along county-owned trails and intersections in Los Alamos and White Rock, focusing on trails leading to parks and schools. Residents should use caution when approaching crews and equipment.

Los Alamos County Dept. of Public Utilities (DPU) staff manages the projects listed in this section. Please slow down and use caution within the construction work zones. Contact the Customer Care Center (505)662-8333, CustomerCare@lacnm.us, or visit ladpu.com/Projects.  

Activity for the week of August 28, 2025

LAFD Hydrant Testing Continues

The Los Alamos Fire Department (LAFD) will be testing fire hydrants throughout the county through September 1. The purpose of testing is to ensure that the hydrants will provide an adequate water supply for fire suppression and to flush out sediments that have accumulated in the water distribution system over the past year. These tests are part of the regular hydrant maintenance program and are conducted jointly with the Los Alamos Department of Public Utilities (DPU). Residents will see LAFD firefighters and vehicles throughout the community releasing water through the hydrants while they are conducting these tests.

Residents may see some discoloration in their water due to the amount and volume of flowing water after nearby hydrants are tested. If this is the case, residents should run the cold-water spigot located outside their home for a few minutes. This will usually resolve the issue. It is also recommended that residents avoid washing laundry until the water runs clear. 

Questions or concerns about this annual maintenance can be directed to the, Los Alamos County Customer Care Center at 505-662-8333 or CustomerCare@lacnm.us.

The Community Broadband Network is being designed by the County's contractor Bonfire with field work being collected by its subcontractor Hexad.  Los Alamos County Broadband Manager Jerry Smith is overseeing the project. 

Activity for the week of September 1, 2025

White Rock: Field Work

Field work for the County’s Community Broadband Network (CBN) is underway. Hexad’s crews are collecting data across the County through the end of September 2025, assessing aerial and underground fiber-optic routes, some on private property. Crews are currently working in White Rock.

Residents may see surveyors evaluating utility poles and opening vaults. In some cases, crews will need access to utility poles in backyards; affected property owners will receive door hangers with the scheduled date and time for entry.

Read the full news article here:

Utility field work for broadband project begins

The following construction project are not funded by Los Alamos County. Updates are included to keep residents informed of potential traffic impacts. Questions should be directed to the parties identified within each description. Please obey all traffic devices and slow down in work zones. 

Activity for the week of August 28, 2025

Los Alamos National Laboratory to repave East Jemez Road

Los Alamos National Laboratory will be repaving East Jemez Road, from the NM-4 intersection (mile marker 10) to the start of the three lanes and the climbing lane (mile marker 7.6). Drivers should anticipate traffic delays and potential traffic pattern shifts during this project. Work is tentatively scheduled to begin on September 5, 2025, and is expected to be completed by the end of September.  Work hours will be from 6:00 a.m. to 6:00 p.m., seven days a week. This paving work will be completed in two phases. Phase 1 (yellow) beginning on September 5, 2025, and Phase 2 (green) in mid-September. 

Fencing to be installed around Los Alamos National Laboratory’s Health Research Laboratory

Los Alamos National Laboratory’s Health Research Laboratory (HRL) complex, adjacent to Los Alamos Medical Center on Diamond Drive, is being emptied for pre-demolition preparation activities. Fencing around the perimeter of the complex is expected to be installed in the next couple of months. Most of the parking used by hospital staff and patients between the medical center and HRL will remain open and may continue to be used. Parking will be reassessed for safety prior to construction mobilization. A gate will be installed under the Los Alamos Canyon (Omega) Bridge to prevent unauthorized access.

The facility characterization process will start in 2026 with physical demolition beginning in the next five to seven years. 

HRL previously housed the Bioscience division. All Bioscience work has been moved elsewhere on the LANL campus and to leased commercial buildings.

For more information, contact: Andrea Pistone, Site Cleanup Program Manager, at 505-231-9584 or email apistone@lanl.gov.

Longview Drive Road Closure and Construction

WR Land Investment, LLC has begun work on Longview Drive in White Rock. Friday, April 11 at 8 a.m. and will continue through September 11, 2025. A road closure will remain in place during the entire project. The project includes demolition of existing buildings, installation of infrastructure, and construction of a new subdivision. The winding road adjacent to Longview Drive will be open during the project. If needed, there is a ‘turnaround’ location on the west side of the road closure. For questions or concerns regarding this project, please contact Philip Gurskey at 267-816-0299.

Hill Apartments: Realignment of 35th Street at Trinity Drive (NM-502)/Pavilion Construction

Construction activities are almost completed on the south side of Trinity Drive near the new 35th St. intersection. Installation of the Rectangular Rapid-Flashing Beacon (RRFB) at the pedestrian crosswalk will be constructed at a later date. Traffic Control devices will be set up for minor pavement corrections for a limited time periods to protect the workers while both eastbound and westbound lanes will remain open.

Motorists and bicyclists will be asked to share the road when asked. Both sidewalks are open. All questions, concerns, or special access needs should be sent to Pavilion Construction at 469-907-6045.

Los Alamos County may or may not oversee the events listed below. Updates are included to keep residents informed of potential traffic impacts. Questions should be directed to the parties identified within each description. Please obey all traffic devices and slowdown in the area of the special events. 

Activity for the week of August 28, 2025

2025 Atomicon at the Mesa Public Library and Fuller Lodge

The Los Alamos County Public Library will host its annual Atomicon at Mesa Public Library and Fuller Lodge in downtown Los Alamos on Saturday, August 30. Area parking lots will experience heavier than usual vehicle traffic for the duration of the event. The event runs from 9:30 a.m. to 5 p.m. Pedestrian and bicycle traffic will also be higher than normal. Vehicle traffic is urged to slow down and be mindful. For more information or questions regarding this special event, contact the Library at 505-662-8265.

2025 Los Alamos County Summer Concert Series

The Summer Concert Series, held every Friday until September 5, is held at Ashley Pond Park in downtown Los Alamos. Each Friday, 20th St. from Trinity Drive to Deacon Street will be closed in the afternoon until following the concert. The Los Alamos downtown area will experience a significant increase in vehicle, shuttle, bicycle, and pedestrian traffic, especially around Ashley Pond Park. Motorists are urged to slow down and watch for others. For questions regarding the Concert Series, contact the Community Services Department at 505-662-8170.