Exhibit 10.6(b)

Facility Site Lease Agreement (Morgantown L2) between Southern Energy Mid-
Atlantic, LLC, Morgantown OL2 LLC and Southern Energy MD Ash Management, LLC
dated as of December 19, 2000

Facility Site Lease Agreement (Morgantown L3) between Southern Energy Mid-
Atlantic, LLC, Morgantown OL3 LLC and Southern Energy MD Ash Management, LLC
dated as of December 19, 2000

Facility Site Lease Agreement (Morgantown L4) between Southern Energy Mid-
Atlantic, LLC, Morgantown OL4 LLC and Southern Energy MD Ash Management, LLC
dated as of December 19, 2000

Facility Site Lease Agreement (Morgantown L5) between Southern Energy Mid-
Atlantic, LLC, Morgantown OL5 LLC and Southern Energy MD Ash Management, LLC
dated as of December 19, 2000

Facility Site Lease Agreement (Morgantown L6) between Southern Energy Mid-
Atlantic, LLC, Morgantown OL6 LLC and Southern Energy MD Ash Management, LLC
dated as of December 19, 2000

Facility Site Lease Agreement (Morgantown L7) between Southern Energy Mid-
Atlantic, LLC, Morgantown OL7 LLC and Southern Energy MD Ash Management, LLC
dated as of December 19, 2000