In exchange, Colorado send their 2010 first round SuperDraft pick and allocation money to Columbus.
Per club and league policies, terms of the allocation money were not disclosed.
A seven-year MLS veteran, Noonan joins the Rapids having scored 38 goals and registering 32 assists in 135 career games. He has appeared in five games this season with the Crew and has tallied one assist.
Noonan began his career with New England and in just his second season won a share of the league's scoring title with 11 goals and 8 assists for 30 points. In 2007, he captured the MLS Cup after having led the Revolution to three consecutive MLS championship games. That same season, Noonan was also named Most Valuable Player in the team's U.S. Open Cup championship victory.
Noonan made 11 appearances for Aalesunds FK of the Norwegian Premier League last year before joining the Crew on August 6, just in time to join them for their 2008 MLS Cup championship run.
The Rapids (4-2-5, fourth in the Western Conference) return from a bye week to take on Eastern Conference leaders D.C. United this Saturday, June 20th at Dick's Sporting Goods Park at 7:30 pm MT.