Road Construction
Contact Info

The Cone Zone Wk of Oct. 21, 2019

Traffic Alerts for Large Transports Next Week/ Expect Delays in these areas:

Thursday Oct. 24: Barranca Mesa, Diamond Dr, Arkansas Ave, North Community:

Desert Wind Transport will be transporting a modular building from the Los Alamos Middle School down San Ildefonso Road to Diamond Drive to Arkansas and to Mountain Elementary on Thursday, October 24th. The move will occur starting at 10:30 a.m. and is anticipated to be finished by 11:30. LAPD will provide escort service as the modular will be moving toward on-coming traffic at the San Ildefonso Roundabout and as it navigates through traffic signals and intersections. 

Saturday/Sunday Oct. 26/27: White Rock, Truck Route, Diamond, Arkansas, North Community:

Desert Wind Transport will be transporting two modular buildings from Chamisa Elementary School in White Rock. The move will proceed down Meadow Lane West to Rover North, NM 4 East and up West Jemez Road (Truck Route), across the Omega Bridge, on Diamond Drive to Arkansas and to Mountain Elementary. The first modular will be transported on Saturday, October 26 starting at 10:30 a.m. and should be in place by noon. The second modular will be transported using the same route on Sunday, October 27 starting at 2:00 pm and should be in place by 3:30 pm. LAPD will provide escort service for both modular building moves. 

Drivers are urged to maintain a safe speed and obey officers as they direct traffic while the modular moves are occurring. 

Questions: Contact Desert Wind Transport  (505) 793-4066 or (505) 328-1270 


Public Works/Traffic Division projects: 

White Rock: Fog Sealing begins Thursday - Rover, Grand Canyon, Bryce

On Thursday, Oct. 24, GM Emulsion will begin fog sealing Rover at SR4 and continue toward Grand Canyon Drive, then sealing Grand Canyon from SR4 to Meadow Lane. They will also work on Bryce Ave from Rover to Meadow Lane. Work hours are 8:30 a.m. - 6:00 p.m. and work should be completed same day, weather permitting. Flagging operations will be in place. The contractor will be visiting area residents and businesses during the week to leave information on schedule, coordination and contact info. 

North Mesa at intersection with San Ildefonso Rd - valley gutter repairs

Work begins Monday. 

11th Street near Opal  - Curb, gutter, sidewalk repairs 

Work begins Tuesday.  

Quemazon near Torreon - road repairs 

Work begins Monday. Flagging operations will be in place. 

Canyon Glen - asphalt and concrete road repairs 

Work begins Monday. Flagging operations will be in place. 

Pedestrians and motorists are urged to slow down, obey all traffic devices and maintain a safe distance from the work zones during the above projects. 

Questions? E-mail, or call 662-8150.


Other road construction projects: 

NM502 Roundabout and Road Reconstruction (NMDOT project)

Tewa Loop access re-opens Oct. 18. No other change from last week's report: NM 502 (Trinity Drive) eastbound and westbound traffic is shifted to the south side of NM 502 (Trinity Drive) for the section of roadway between Arroyo Lane and east of Tewa Loop with one lane of travel in each direction. 

Access to businesses and buildings or parks located on the north side of NM502 is being maintained. 

The current detours between Knecht St. and Central Ave are the same: East-bound NM502 traffic detours onto 4th Street and Central Avenue. After a full stop, motorists turn right (east) and travel through the construction zone to continue east-bound out of Los Alamos on NM502. West-bound NM502 traffic entering Los Alamos and approaching the roundabout construction zone detours onto Central Avenue then west to Knecht Street then left to return to Trinity Drive. 

Project hours are 9:00 a.m. to 4:30 p.m. Monday through Friday. Please slow down, use caution and expect delays in this area, especially during peak commute times. 

Traffic advisories from NMDOT are available on and motorists are asked to check the site for updates on this project as it proceeds. 

TA-21 Clean Up Project - DP Road (N3B project):

No change from last week's report. Clean-up work on the LANL TA-21 Site at the far eastern end of DP Road continues. Large trucks carrying away demolition debris containers will be exiting DP Rd at an average of approximately three trucks per day. Motorists are asked to be alert for trucks exiting; use caution when entering or exiting DP Rd, as this area is near the NM502 Road Reconstruction project.

Oppenheimer Road Excavation

Marcon Excavating, Inc continues excavating a section of road located near 557 Oppenheimer with a traffic lane shift in this area. The project timeline has been extended and it is now anticipated to wrap up by October 31. Motorists are urged to drive slowly through this work zone and watch for pedestrians.

Cable projects around downtown Los Alamos

Kelly Cable will be conducting several fiber or cable repair projects next week on Trinity Drive, Deacon Street, Central Avenue - temporary sidewalk closures may occur.   





About this page... This page provides citizens with basic information on County and non-County road construction projects. We are maintaining the page in the interest of keeping our citizens, visitors and commuters informed as a public service with one landing page where all information or links to information can be found.

About the Cone Zone...
The weekly Cone Zone report is posted here at the top of the page on Friday afternoons from March 8 through November 22, 2019, and then again from March through November 2020, in order to support public outreach especially for the NM502 Roundabout project, which is being constructed by the State of New Mexico's Department of Transportation over two construction seasons in Los Alamos. 

More about the State of NM DOT's NM502 Reconstruction & Roundabout Project...

Here is a project map showing projects in the area of NM502 and the roundabout/near DP Road which may cause additional traffic congestion heading into the busy summer months. Motorists are asked to use caution in this area. Staging for the equipment and infrastructure needed for the NM502 project (a fenced, secure area for Star Paving) is located on DP Road, as shown on this map.

Here is a project drawing showing what the NM502 Roundabout will look like when completed (furnished to the County by the State of NM DOT)

Due to utilities conflicts along NM502 for the new roundabout to be constructed, new storm sewer, retaining walls and grade changes associated with the new road design, infrastructure for water, sewer, electric, natural gas and fiber optics will be replaced and relocated as follows:

• Replace and relocate 2000 feet of water transmission line
• Replace and relocate 4500 feet of water distribution lines, including all service connections and fire hydrants in the corridor
• Replace and relocate 4000 feet of natural gas lines including all services lines in the corridor
• Replace and relocate 350 feet of sewer lines
• Replace and relocate 5000 feet of underground electric lines, including duct banks, conductors, transformers, vaults and all service connections in the corridor
• Replace and relocate 1400 feet of the fiber optic systems owned by Los alamos County and Comcast

Here is a link to the NMDOT webpage for all District 5 Proposed and Active Projects with additional information from the State. Scroll past all Proposed projects to the bottom of the page where you will see NM502 listed as an Active project. The State has posted additional information about roundabouts on this page, along with the March 20, 2019 public meeting presentation. The presentation shows many aspects and views of the construction project and detours that can be anticipated as it proceeds over the next two years. 

Nearby projects:
N3B - TA-21 Clean Up
N3B and their contractor are working in 2019 and 2020 on an environmental remediation/clean up project at the former TA-21 site (far eastern edge of DP Rd).

Here is a Fact Sheet about that N3B project which involves hauling away non-radioactive or low-level waste after properly packaging it in containers.

Infrastructure for Bethel Housing Developments - installation on or along DP Road:
Bethel Development's “Canyon Walk” apartments will be starting infrastructure and construction of new affordable workforce housing, scheduled to begin Fall 2019 with completion by Fall 2020. A second housing project by Bethel called “The Bluffs” on DP Road is also funded and work could begin in 2020 to build additional Senior Housing. Both of these sites are referenced in the main NM502 project map shown above.

Future DP Road Infrastructure (long-term County project)
The County could begin installing infrastructure for the DP Road area in the future, as more land parcels become available and after TA-21 remediation is completed. These parcels are part of DOE Land Transfers that could be used for future light industrial or residential development. The infrastructure would extend to the TA-21 site as a "spine" for future development on the north and south side of the road. DP Road needs to be upgraded to include basic infrastructure that could be used by existing or new businesses or homes. For example, there is currently no sewer line in this area. The County applied for grant funding last year for offsetting these types of infrastructure costs for the DP Road project, but it was not approved.

What else do I need to know?

For general questions about construction, you may call the Customer Care Center at 505-662-8333 and a representative will direct your call to the appropriate office. 

For feedback on this webpage, send an e-mail to the webpage administrator.

To view traffic in various areas around Los Alamos and White Rock visit our new page
camera views around town

What's next? A note about planned or possible future road projects:

Below is a listing of projects that motorists WILL or MIGHT see occurring in Los Alamos that might further impact NM502/Trinity Drive:

Canyon Rim Trail Underpass:
An underpass to connect LA Mesa trail underneath NM502 and south to the Canyon Rim Trailhead is wrapping up design stage and set to go to construction Spring 2020. It is located further east from the NM502 project. 

Work in Los Alamos on various projects by the County or by others may get underway in 2019 or 2020 that might cause some traffic slow-downs:

Trinity Drive:
In June, the State DOT announced that they have secured funding to do much-needed roadway, curb and gutter repairs on Trinity Drive, from Diamond to the eastern edge of Los Alamos. Work was expected to get underway in Fall 2019 but then delayed until Spring 2020; we are awaiting further updates from the State. A portion of the work would involve a "road diet" near the turn off to the former LASO building site (now expected to become The Hill apartments with construction beginning soon.)

There could be several projects occurring over the next two years while NM502 is under construction at the eastern edge of Los Alamos:

Hilltop house hotel - adjacent to the NM502 roundabout project. It was reported in October 2019 that the hotel has been sold to a private developer. No other information has been released by the developer. 

Construction on a new Marriott TownPlace Extended Stay Suites plus conference center at the 20th Street (all six pads) lot - the Local Economic Development Act ordinance required to complete this transaction was passed on a 5-2 vote by Council on Oct. 15, 2019. Further details will be shared on this page as they become available. Visit the project page here.

Traffic light installation - a new traffic light will be installed within the next two years at 20th and Trinity Drive once the Marriott hotel listed above is constructed. 

Additional Trinity Drive safety projects between Oppenheimer and Knecht are set to occur (from the State DOT) within the next two years.

New business construction or renovation along Trinity Drive will continue (Natural Grocer store is being built at the Shriner's Club lot, Wendy's is expected to renovate and occupy the former McDonald's lot)

SR4/Truck Route intersection:
This has been a high-profile project for several years - there are design plans in progress but no funding set aside for construction. At this time, and because of the impact that will already occur for increased traffic on SR4/Truck Route during the NM502 project for two years, it is not anticipated that there would be road work on the intersection at the same time.

Watch for updates on this page for Future Projects such as the ones listed above, or, for new projects to be added as they are identified. As the County gets more details, updates will be posted here.

Construction can be difficult and present special challenges for businesses caught in the construction zones and related/adjacent areas. Motorists tend to avoid orange barrel zones and this can have significant economic impacts on businesses. Los Alamos has many small, locally-owned and operated restaurants, specialty shops and stores on the eastern edge of Los Alamos. The County encourages residents and visitors to support local businesses, especially those on DP Road, which will likely be impacted by the construction. Other businesses at Entrada Business Park, East Gate, along Trinity/Knecht (Mari Mac and Smith's Marketplace and further west on Trinity) as well as those on Central Avenue may likely be impacted, too. The County is working with MainStreet and the Chamber of Commerce to find ways to mitigate impacts and support them, but your help is urgently needed! Allow extra time for patronizing these businesses, but please don't shy away just because of construction! They need your help to continue to operate all of your favorite and valued restaurants, shops and other small businesses to be able to provide you great products and services.