 The "old" substation, which is an historical building dating back to the 1920s is primarily used for storage, while the "new" substation, built in 1968, serves its respective purpose.Aside from the substation on the grounds of the WMLP, it owns two other main substations throughout Wellesley.One of these substations (Station 378) was rebuilt and renovated with new equipment from 2005 to 2006.