“The Mid-Atlantic Power Pathway Project will provide Delaware ratepayers with access to significant, new, competitively priced supply, and will allow [Delmarva Power] to cost-effectively meet forecasted demand via the competitive wholesale auction procedures currently in place.”

Delaware State Senator Harris B. McDowell, III
Chair, Energy and Transit Committee

December 2006



PROJECT OVERVIEW
Key Stats
  • MAPP will serve the District of Columbia, Maryland and Delaware
  • The MAPP Line will consist of 72 miles in Charles, Prince George’s, and Calvert Counties, Maryland, 12-35* miles across the Chesapeake Bay, 12-38* miles in Dorchester County, Maryland, 8 miles in Wicomico County, Maryland, and 27 miles in Sussex County, Delaware
  • Construction on the line is expected to be completed in 2014
  • The project will cost about $1.2 billion and local counties in which construction occurs will receive annual tax revenue from MAPP
*Final distances will be dependent upon the selected route

Much of the East Coast relies on a congested power system that can’t meet rising demand without significant upgrades. In the past 30 years, the population of this region has risen dramatically and today’s American home uses 21 percent more power than in the mid 1970s.

As a result of this increasing demand for power, the existing transmission system in the region will not be able to keep up in the years ahead. Experts such as PJM, the regional transmission operator and the U.S. Department of Energy have concluded that building new transmission will help address this problem.

The MAPP project is a 150-mile transmission line that will significantly increase the region's ability to import power. Local utilities and electric cooperatives rely on this transmission system to keep the lights on for their customers and early estimates suggest that the entire MAPP line, which crosses three states, could bring enough new power to the region to light up an additional 800,000 to 2 million homes.

When you combine this new energy with a stronger focus on energy conservation and development of new clean air power sources like wind, solar and nuclear, the Mid-Atlantic region, including the Delmarva Peninsula, will be well positioned to meet the energy challenges in its future.

MAPP has a target completion date of 2014. The entire project is expected to cost about $1.2 billion. A majority of the transmission line (about 65 percent) will be built along, or adjacent to, existing transmission towers. It will connect numerous points on the grid that are currently underserved, and it is expected to begin improving transmission in as little as two years after construction begins.

“Transmission offers the highest total economic value added compared to the costs. New transmission affects both capacity and energy costs because it relieves the physical transmission constraints in the grid.” Maryland Public Service Commission Interim Report to the Maryland General Assembly, December 2007


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