In 1959, a group of citizens, concerned by proposed unsightly development of Boulder’s scenic mountain backdrop, initiated and successfully campaigned for the “Blue Line Amendment,” which prohibits city water service above a certain elevation. These citizens organized PLAN-Boulder (PLAN stands for People’s League for Action Now). Since then, PLAN-Boulder County helped establish the City of Boulder’s Parks and Recreation Department and was instrumental in creating the city’s Open Space program. PLAN-Boulder County has been at the forefront of creating Boulder’s Historic Preservation Ordinance, the city’s building height limitation, the Transportation Master Plan, and the Boulder Valley Comprehensive Plan. More recently, PLAN-Boulder County has advocated for individual issues related to affordable housing, long-range planning, open space management and conservation, neighborhood character, and clean energy/greenhouse gas reduction.