Cone Zone: Week Of Nov. 1, 2021


Note: This will be the final publication of the Cone Zone for the season. Weekly updates will start up again in March.

Public Works Projects:

The projects listed in this section are being managed by County Public Works staff through contractors. For more information, email, call 505.662.8150, or visit the “Projects/Public Works” link at

Please slow down and use caution within the construction work zones. Please note the below information is based on a schedule provided by the contractors and may change due to weather or other delays.

Canyon Rim Trail Underpass 

Los Alamos County Public Works Department is pleased to announce the opening of the Canyon Rim Trail Underpass and the reopening of the adjacent trailhead parking lot along NM 502.

Crews with AUI, Inc. have completed the major portions of work allowing for public use of this new facility. The public should be aware that minor work and clean-up by crews will continue in the area through November. In addition, the electrical lighting system in the underpass and parking lot is pending state inspection and approval, and once approved, the system will be energized. Lastly, two park benches awaiting delivery will be installed upon arrival.

A ribbon cutting ceremony is tentatively scheduled for December. More information on this event is forthcoming.

The public is encouraged to use the trail for hiking, walking, running, and bicycling. The Canyon Rim Trail is a scenic 2.5-mile pathway along East Road. The trail offers grand views into Los Alamos Canyon, of the Jemez Mountains to the west, and across the Rio Grande Valley to the Sangre de Cristo Mountains to the east

North Mesa Roadway and Utilities Improvement Project (Casa de Oro)

TLC Plumbing and Utility continues road and utility improvements on Alamo Rd, Capulin Rd, Tsankawi St, Oro Ct, Tsankawi Ct, Cedro Ct, and Big Rock Loop South. Residents will continue receiving landscaping remediation around the newly installed water cans and sidewalks. Paving of portions of Alamo Rd., and Tsankawi St. will continue next week. Concrete collars around utility valves will be placed on Alamo Rd. Work hours are 7 a.m. to 5 p.m. Monday through Friday, weather permitting.

Traffic signs and devices will shift vehicular, bicycle, and pedestrian traffic around work zones. Access to residents as well as services such as mail delivery, emergency services, school bus routes, trash and recycling collection will be maintained. Motorists, bicyclists, and pedestrians are advised to be alert for construction personnel and equipment and use caution traveling through the work zone.

Leisure Lagoon (addition to the Aquatic Ctr.)

The contractor has paved the bike lane that has been closed and will be making spot repairs to the curb and gutter along Canyon once the work inside the fencing is completed.

The back drive remains closed to public access. The Traffic & Streets Division will be making some non-project related repairs along the “front” portion of the Aquatic Center next week, replacing 6 sidewalk squares.

The trail near the Nature Center remains open to the public.

Traffic & Streets Division Projects: 

The projects listed in this section are being managed by County Traffic & Streets Division staff. Please slow down and use caution within the construction work zones.

Sidewalk Work along Canyon Rd next to the Larry Walk-up Aquatic Center

Crews will be replacing sections of sidewalks along Canyon Rd next to the Aquatic Center starting Monday, Nov. 1 and continuing through Tuesday, Nov. 2. Work will begin each day at 8 a.m. and end by 3:30 p.m.

Utilities Department Projects: 

The projects listed in this section are being managed by County Dept. of Public Utilities staff. Please slow down and use caution within the construction work zones.

Waterline Replacement on State Rd 4 at E. Jemez Rd

RMCI, under contract with the DPU, will replace a section of 16-inch waterline in the shoulder of and under NM State Rd 4 at E Jemez Rd (Truck Route) ahead of the New Mexico Dept. of Transportation road rehabilitation project.  

Northbound traffic: No lane closures. Barrier walls along the shoulder of the northbound lane on NM4 at E Jemez Rd remain in place. Crews will test, disinfect, and flush the new waterline and then tie it into the water system. 

Southbound traffic: A lane closure is planned for the right turn lane for southbound traffic on NM4 at the E Jemez Rd intersection possibly as soon as Wednesday, Nov. 3. Motorists will still be able to turn right on to E. Jemez Rd. from the center lane. Crews will bore and jack under NM4 from west to east. A barrier wall will be erected in the southbound road shoulder for the bore pit. 

Asphalt/Concrete Repairs Various Locations Around White Rock and Los Alamos

Under contract with the DPU, GM Emulsion will begin repairs to emergency utility asphalt and concrete cuts that occurred during the winter. Crews will rotate to various locations throughout White Rock and Los Alamos neighborhoods. Traffic control equipment, such as signage, barrels and barricades will be erected around the work zones. Flagging operations may be deployed to assist with traffic flow. Crews will begin at 8 a.m. and work until 5 p.m. Most locations slated for repairs are on residential streets and should take less than one day. Traffic impacts should be minimal.

Non-County Projects

The following road construction updates are posted below in the interest of keeping residents informed but are being managed or conducted by others. Please obey all traffic devices and slowdown in work zones. 

Rumble strip installation project begins on NM 502 

NMDOT along with Dustrol Inc. will begin a rumble strip installation project on NM502 (Main Hill) Today, Oct. 30. 

Work will take place from mile marker 2 to 6. The 4-mile project is expected to start at 10 a.m. and finish by 4 p.m. One lane will be closed during working hours, there will be traffic control personnel at each end of the closure and a pilot car will guide motorists through the work zone.

Motorists should use caution, obey posted speed limits, expect delays and plan accordingly.

Tunnel Work Under Diamond Drive (LANL):

Work on the Diamond Dr Tunnel Replacement is progressing. Backfill work is scheduled to begin the week of Nov. 1.

Diamond Drive is expected to reopen with one lane in each direction Nov. 12.

Drivers are asked to adhere to the speed limits. Drivers have been seen speeding, especially on Bikini Atoll, Mercury, and Pajarito roads. Detours and construction routes may take longer than expected. Be aware of pedestrians crossing the street and yield the right of way to pedestrians in the crosswalk.

Access to Pajarito Rd is available via a detour through Bikini Atoll Rd. Access to buildings on the west side of Diamond remains the same. On the east side, parking lots can be accessed near Eniwetok. Parking areas near Grable Rd also are open. For access to Utilities and the steam plant, use Grable Rd. TA-03 parking lots aren’t affected.

DP Rd (Work related to Canyon Walk Apts and The Bluffs – Bethel Development) Qualcon Builders, LLC – 120 DP Rd Utility Infrastructure Replacement and Roadway Reconstruction

The majority of the roadway construction activities have now been completed. Next week, work will include construction of remaining sidewalk sections, and clean up and grading along the sides of the roadway. These activities will impact DP Rd from Trinity Dr to Fire Station #2 with segments of the roadway periodically restricted to one-lane traffic controlled by a flagger.  One-lane traffic restrictions will occur only during hours of construction potentially from 7 a.m. to 7 p.m. daily.

The contractor work on DP Rd is related to the new Canyon Walk Apartments (under construction) and The Bluffs senior housing (soon to be constructed). The roadway reconstruction includes installation of curb and gutter, sidewalks and paving of the roadway. All construction activities related to the reconstruction of DP Road are now expected to be completed by the end of November.

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