Various options were researched but following a process of elimination, two viable options were evaluated. Both options included the construction of a 69kV – 13.2kV substation situated in the southeast corner of the campus. The main difference was the location with respect to an abandoned rock quarry. The south site location required the 13.2kV feeders exit the substation via overhead feeders. The north quarry site allowed for direct underground connection to the existing campus distribution system.
The proposed substation design included; 69kV MetEd service; two 69kV circuit switchers for transformer protection; two sets of utility metering; two 7.5/9.375 MVA power transformers; and a double-ended, 13.2kV switchgear lineup housed in a prefabricated building. The entire substation is enclosed in a fenced yard with crushed stone surface. Duct and manhole systems would be extended to the new substation and several miles of new distribution cabling would be installed to interconnect the existing feeders.