Cone Zone: Week Of May 20


The Public Works/Traffic Division provides the latest updates on the following projects:

Tsikumu Village – Road Improvements

Albuquerque Asphalt continues with minor concrete work including the placement of concrete collars around utility manholes and valves as well as isolated curb, gutter and sidewalk repair. With the project nearing completion, crews will also be addressing final punch list items and general clean-up of the work area. Access to residences as well as mail/package delivery, school and transit routes, emergency services, trash/recycle/yard waste pick-up will be maintained.

New Guardrail to be Installed at San Ildefonso Roundabout

San Bar Construction Corporation will be installing a new guardrail on San Ildefonso Road near the roundabout. The work will be in the northbound lane, on the east side of the road, near the approach to the roundabout. Weather permitting, work will commence 9 a.m. to 3 p.m. Tuesday, May 21 and will potentially continue through Friday, May 24. A flagging operation will be in place. Please obey all traffic control signs and proceed slowly with caution through this work zone.

Contact Traffic and Streets at 505.662.8113 with concerns

Road Striping – Los Alamos & White Rock

Traffic and Streets Division crews continue striping local roadways to replace faded markings for traffic safety. Crews are working east on Trinity and east on Canyon/Central to East Rd at the edge of Los Alamos. Once they have completed striping in Los Alamos, they will move to White Rock. Work will continue until main roadways are finished; all work is expected to wrap up mid-July. Work is weather dependent. No traffic delays anticipated that will impede traffic flow; please slow down and use caution when crews are working in these areas. 

Questions on the above project? E-mail or call 505.662.8150.

Other road construction projects

NM502 Roundabout and Road Reconstruction (NMDOT project)
Star Paving continues work on the detour pavement on the north side of NM502 (Eastern area residential/airport side) and along the west shoulder of 4th Street to Central Avenue. During detour paving, flagging operations will be in effect 9 to 4:30 p.m. Monday through Friday and traffic may be stopped for short durations for one lane passage through the work zone.

In addition, the common trench for underground utilities will get underway at the western end of the work zone; weather permitting. The two-way traffic will be shifted to the north side of the road for installation of utilities between Tewa Loop and Sombrillo Court.

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

Omega Bridge/E. Jemez Road Work with Full Rd Closure on Weekends (NNSA project)
The road closures for East Jemez Road that had to be canceled for last weekend (May 10-12) due to inclement weather has been rescheduled for June 7-9.

Questions or concerns about the project can be directed to

TA-21 Clean Up Project – DP Road (N3B project)
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 Road 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 Road, as this area is near the NM502 Road Reconstruction project.

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 March 8 through Nov. 15, 2019, and then again 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; and
• 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 will be working this year and next year 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.

What else do I need to know?

The County is working on “Frequently Asked Questions” about the projects occurring in the vicinity of NM502/DP Road. Watch for that document to be posted as a PDF here on the webpage when it is available. 

Links to other entity websites for projects will be featured here for convenience as they become available.

For general questions about construction, 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.