In November of 2011 the Cle Elum City Council approved a Master Site Plan, an Annexation and Development Agreement, and a Planned Action Ordinance for City Heights, a planned mixed-use development that includes the development of up to 962 dwelling units on 358 acres in the City of Cle Elum generally located north of 6th Street.
The current Cle Elum population is roughly 2000 people. 963 new dwelling units with an average of 2 people per dwelling just about doubles the current Cle Elum population.
More info about Cle Elum City Heights: http://cityofcleelum.com/city-services/planning/city-heights/