Not all of the water in the Roaring Fork Watershed empties into the Colorado River at Glenwood Springs. Transmountain diversions move water under the mountains and the Continental Divide to provide water for front range communities. Two of the five largest transmountain diversion projects in Colorado, the Twin Lakes Transmountain Diversion System and Fryingpan-Arkansas Project, divert water to the Arkansas River Basin on the eastern side of the Continental Divide.