The Mississippi Public Service Commission, in an Oct. 6 order, said that a hearing will be held on Oct. 19 in Holly Springs, Miss., regarding Northcentral Mississippi Electric Power Association’s petition for a certificate of public convenience and necessity authorizing it to build, operate and maintain a substation facility in Marshall County, Miss.
According to the February petition, the three-phase Cox Road substation would have a high-side voltage of 161-kV and a distribution voltage of 24,940 volts nominal. Northcentral said that the substation would be a single bus high side design, equipped with two 161-kV circuit switchers, one for the power transformers and the other a redundant circuit switcher
Northcentral also said that the construction of the substation is necessary to provide sufficient capacity, improve reliability, and provide for load growth in Marshall County and particularly to supply growing demands in Northcentral’s northeastern territory. The additional capacity is also needed to relieve loading on the existing Byhalia substation, Northcentral said, adding that the substation would provide an emergency backup to the existing Byhalia substation. The Cox Road substation would provide the necessary capacity for the area’s local growth, as well as improve reliability and service for existing customers and future customers for several years in the future, Northcentral said.
The substation is being designed by a consulting engineering firm to be compliant with any environmental quality regulations as well as the federal Environmental Protection Agency’s Spill Prevention Control and Countermeasures Plan and would be designed to have secondary oil containment built into the facility, Northcentral said.
Among other things, Northcentral said that the proposed substation is estimated to cost about $2.7m.