served by several exits on the freeway. SH 470 turns east in Ken Caryl near Hildebrand Ranch and intersects SH 121 at the western edge of the Chatfield Reservoir. The freeway turns northeast and dips into Columbine as it skirts the northern edge of the reservoir and its dam before coming to an interchange with US 85. SH 470 gains a parallel multi-use trail for pedestrians and bicycles that follows the freeway as it enters Highlands Ranch in Douglas County. The freeway cuts through the northern edge of Highlands Ranch's residential neighborhoods, intersecting SH 177. SH 470 dips to the south to follow Willow Creek around the Park Meadows shopping mall in Lone Tree, terminating at a stack interchange with I-25. The freeway continues east onto the E-470 tollway, which completes a half-loop around the eastern suburbs of Denver. History Proposed I-470 In the 1960s the Colorado Department of Transportation perceived a need for a beltway around the Denver Metro Area and sent a proposal to the Federal Highway Administration. The plan was for the federal government to provide 90% of funds for the project with the state providing the difference. I-470 was added to the Federal Highway Act of 1968 and was to be part of the Interstate Highway and Defense System. The Denver City Council approved the location and began engineering and environmental impact studies. After a few months the studies went under analysis with negative feedback. The Colorado Department of Health was opposed to the interstate beltway on the grounds that it would violate the Federal Clean Air Act. Other studies compared the proposed I-470 to the I-25 and I-225 freeways suggesting that alternate uses for the land (other than freeways) would be more environmentally friendly. Alternatives and construction In response to feedback from the Colorado Department of Health, the governor ordered all efforts to plan and build the beltway to cease. A separate commission was established by Governor Richard Lamm to determine the best course of action. The commission came up with 11 alternatives. The final decision was to use federal highway funds to build a grand parkway known as Centennial Parkway (a partial beltway in the southwest portion of the metro area) and widen existing roads. As the southwestern area grew rapidly, plans for Centennial Parkway evolved to conform to freeway standards. The proposed road was designated State Highway 470. Present-day SH 470 is a