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Through its Southeast Capacity Project, Duquesne Light Company is planning to expand its transmission system capacity in the Southeast area of its service territory due to the unexpected shift in electric generation power flow as a result of the planned retirement of several nearby power generation stations. These transmission system upgrades are necessary in order to continue to maintain a level of service and reliability our customers have come to expect while increasing the overall resiliency of the grid.

The project includes re-building the 138 kilovolt (kV) electric transmission substation in the community of Elrama, and building a new 138 kV transmission line from this substation to the Dravosburg substation.  Line replacement also is planned on several other 138 kV circuits. In addition, equipment upgrades will take place at substations in the boroughs of Wilson, Dravosburg and West Mifflin. All transmission line replacement work will be completed within existing Duquesne Light easements or rights-of-way



Engineering currently is under way.  Construction is scheduled to begin in the fall of 2019 and to end in the spring of 2021.



From Dravosburg Substation to Mitchell Substation.


Southeast Capacity Project-1_edited
Lattice tower
Existing Lattice Tower Structure

Average height is 93 to 193 feet
Average base is 20 to 44 feet


Average height is 85 to 140 feet
Average base is 7 to 11 feet



If you have any questions or concerns, please contact or call 412-393-6500.

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We Power The Moments You Call Life.

One More Reason We’re Larger Than Light.