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Transportation and Engineering Design Project
The project initially studied the universe of alternatives for improving the safety and capacity of the intersection and evaluated the environmental impacts (i.e., the Feasibility Study).
The Feasibility Study was a cooperative effort involving Jefferson and Douglas counties and Lockheed Martin. Funding for the initial engineering analysis and design work was shared equally among the three stakeholders. Other key agencies on the project include the Colorado Department of Transportation (CDOT), the U.S. Army Corps of Engineers, the Nation Audubon Society, Denver Water and Colorado State Parks (i.e., Chatfield Reservoir).
The Locally Preferred Alternative (i.e., the Recommended Alternative) was a bridge over Wadsworth to Waterton Road with an underground pedestrian tunnel under Waterton Road for the many recreational users of Waterton Canyon for an estimated cost of $11.6 million.
Since the Feasibility Study was completed, the county staff re-evaluated the traffic projections, which revealed that the traffic volume going into the Lockheed Martin’s Waterton Plant will be significantly less than previously estimated, so a more cost-effective solution is being considered. A traffic signal at the intersection will significantly improve both the safety and capacity for the intersection for many years to come. In fact, the traffic signal at the intersection with other geometric improvements could last for some 20 years, depending on the rate Sterling Ranch is developed in Douglas County.
The traffic signal for the intersection project is estimated to cost $4.1 million, which is considerably less than the bridge alternative of $11.6 million. In the spring of 2012, CDOT awarded $2.05 million in FASTER funds to the project, which will be matched by Jefferson County’s $2.05 million. The engineering consulting firm of Felsburg, Holt and Ullevig is doing the design for the traffic signal project.
Traffic Signal Layout
Locally Preferred Alternative from the Feasibility Study
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