2000s

In July 2001, the Thornton Recreation Center was renamed Margaret Carpenter Recreation Center.
In 2000, the city’s population is just reaching 80,000 and is 27.2 square miles in size.
In August 2002, E-470 was extended from E-470 to Hwy 85.
2002-2003 the community faces a drought.
January 3, 2003, the Northwest Parkway Interchange was completed.
In 2003, Thornton signed a water agreement with the City of Aurora.
December 2003, a additional free community festival called WinterFest was held.
In 2004, the Columbine Treatment Plant was upgraded.
September 2004, the City launches ambulance service.
November 2004, the Thornton Justice Center was completed for the Police Department and Municipal Courts.
July 21, 2004, I-25 & 136th Ave. Interchange opens.
In 2005, Larkridge, the largest northern area retail center at 963,000 square feet officially opened.
April 2005, the North Washington Subarea Plan was adopted as an amendment to the Comprehensive Plan.
February 28, 2006 the City Council passed a resolution renaming the Columbine Water Treatment Plant to the Wes Brown Water Treatment Plant.

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