 The fragmented governmental structure has made the adoption of a comprehensive land-use and growth policy more difficult, especially in regard to Aspen, which has struggled between the extremes of allowing unbridled growth leading to sprawl and restricting growth altogether.Roaring Fork Conservancy works on river and water issues across these lines and the Roaring Fork Watershed Collaborative works to address regional issues in this geographic area.The main economic engine of the valley is the Aspen/Snowmass recreational skiing complex which directly or indirectly drives the related tourism, hospitality, retail, construction, real estate, professional service and property maintenance industries.