inaccurate and costs are higher or lower than predicted, the previously set rates cannot be changed to correct for the error”); Boston Edison Co. v. Dept. of Public Utilities, 375 Mass. 1, 6, 375 N.E.2d 305 (“a rate increase may not be awarded retroactively as matter of law”), cert. denied, 439 U.S. 921, 99 S. Ct. 301, 58 L. Ed. 2d 314 (1978); In re Petition of Elizabethtown Water Co., 107 N.J. 440, 452-53, 527 A.2d 354 (1987) (utilities may not recover revenue deficiencies caused by insufficiency of prior rates because rate making is necessarily present and prospective); Providence Gas Co. v. Burke, 475 A.2d 193, 197 (R.I. 1984) (“[o]ne of the central principles of ratemaking is that rates must be prospective”); Railroad Commission v. Lone Star Gas Co., 656 S.W.2d 421, 425 (Tex. 1983) (<HOLDING>); MGTC, Inc. v. Public Service Commission, 735
holding that prejudgment interest may properly be added to damage awards for past lost wages medical expenses that have been incurred and past pain and suffering but not future loss of earnings future medical expenses andor future pain and suffering recognizing fundamental principle that utility rates are set for the future and not the past recognizing same principle recognizing principle holding that debtor was liable to the commonwealth for past and future cleanup costs