Where will the transmission line be placed?
How tall are the poles for the proposed construction of the line?
How is the width of a right-of-way (ROW) determined?
Where will the transmission line be placed?
MAPP will originate in Northern Virginia, cross southern Maryland, cross under the Chesapeake Bay, travel across the Eastern Shore of Maryland, then travel into Delaware to Indian River, Delaware.
Approximately 85 percent of this line will be built on, or adjacent to, existing rights of way, either on existing or new structures. In southern Maryland, 52 miles of the line will be installed on existing towers. PHI is working closely with landowners, residents, environmental groups, government officials and regulators in each step of the project.
Back to the top
How tall are the poles for the proposed construction of the line?
Most of the 52 miles of line from Possum Point to Chalk Point will be hung on existing structures. The new structures from Chalk Point to Chestnut Converter will range from approximately 125 to 195 feet tall, depending on the location. On the Eastern Shore, the structures between the Choptank Transition Station and Gateway Converter will range from approximately 70 to less than 195 feet in height, with a majority being 85 to 95 feet. The structures from Gateway Converter to Mission Converter will range from approximately 135 to less than 150 feet tall with an average pole height of 140 feet. The final design of the poles for overhead portions of the line will depend on various engineering, operating, and right-of-way considerations, along with the input from the various landowners, environmental groups and permitting and regulatory agencies
Back to the top
How long is MAPP?
MAPP will be 152 miles long. The line will be a combination of AC and DC lines.
Back to the top
How is the width of a right-of-way (ROW) determined?
The width of ROW is determined as the distance necessary to maintain compliance with federal reliability requirements and other standards, and is based primarily on the voltage of the line, along with its proximity to other transmission facilities.
The federal requirements that direct the width of the ROW similarly guide the vegetation management procedures and configuration of the line facilities, including the height of the towers and the distance between structures. Utilities own and manage thousands of miles of rights-of-way, upon which electric transmission and distribution lines and access roads are sited. Pepco and Delmarva have in place and will have specific to MAPP formalized plans for vegetation management, periodic inspections (ground and aerial), and other protocols to protect and manage vegetation in the ROW.
Back to the top