OPINION BY
Before this Court are two consolidated cases involving a March 3, 2010, order (Order) of the Public Utility Commission (Commission). In the first case, (532 C.D. 2010), Metropolitan Edison Company (MetEd) and Pennsylvania Electric Company (Penelec) (together, Companies) petition for review of the Order which rejected the Recommended Decision (RD) of an administrative law judge (ALJ) and denied the Companies’ request to classify “marginal transmission losses” or “line losses” 1 as transmission costs under Companies’ Transmission Service Charge (TSC) Riders so that Companies could recover those costs from ratepayers under the TSC Riders. The Commission, instead, found such costs to be generation-related costs, subject to rate caps until December 31, 2010, and not recoverable from ratepayers. In the second case, (632 C.D. 2010), William R. Lloyd, Jr., Small Business Advocate (OSBA) cross-petitions for review of the Commission’s Order to the extent it adopted the ALJ’s recommendation allowing Companies to recover the interest, i.e., carrying charges, on previously incurred transmission costs related to the “unwinding” of hypothetical generation contracts. The OSBA intervened in Companies’ Petition for Review, and Companies have intervened in the OSBA’s Cross-Petition for Review. 2 The Met-Ed Industrial Users Group and the Penelec Industrial Customer Alliance (Customers) have intervened in both Companies’ and the OSBA’s petitions for review. 3
I. 532 C.D. 2010 — Line Losses
On April 10, 2006, Companies filed with the Commission a Rate Transition Plan (RTP) seeking to establish TSC Riders through which Companies sought to recover the following costs: (1) network integration transmission service (NITS) costs and Federal Energy Regulatory Commission (FERC)-approved PJM Interconnec
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tion, LLC (PJM)
4
transmission congestion charges; (2) FERC-approved transmission-related ancillary and administrative costs incurred and administered by PJM; (3) “other” FERC-approved costs similar to those in (1) and (2) that may arise in the future and charged under PJM’s Open Access Transmission Tariff (OATT); and (4) transmission risk management costs incurred to mitigate risks associated with transmission-related costs. Companies’ 2006 RTP filings included the recovery of congestion costs, but not line losses, despite the fact that PJM was assessing Companies for average line losses. On January 11, 2007, the Commission approved the TSC Riders, including the congestion costs, but with no reference to recovering average line losses (2007 Order). The Commission’s 2007 Order was appealed to this Court, which affirmed,
inter alia,
the Commission’s determination that congestion costs may be deemed a part of transmission costs and, thus, not subject to Companies’ generation rate cap in effect at that time.
Met-Ed Industrial Users Group, et al. v. Pennsylvania Public Utility Commission,
On March 30, 2007, Companies submitted their first quarterly report of the TSC Riders, which did not attempt to collect line losses. On June 1, 2007, PJM changed how it sought payment for line losses from calculating them based on system average losses to marginal losses, with Companies receiving a bill for marginal losses in July 2007. On July 13, 2007, Companies filed their second quarterly report, which included marginal line losses as a line item in the amount of zero, but did not seek to recover line losses for January 2007 through May 2007. In them third (revised) quarterly report, filed on October 31, 2007, Companies included, for the first time, line losses in them cost worksheets for the period between June 2007 and August 2007. Companies have not sought approval to amend them tariffs to include line losses in the definition of transmission service charges to be collected under the TSC Riders. On April 14, 2008, Companies filed their initial annual TSC Reconciliation Filings for the 2008-2009 TSC period, which proposed significant increases in Companies’ TSC rates through proposed tariff supplements. The Reconciliation Filings essentially indicate the estimated amount of under-collection of transmission-related costs resulting from the billing of the TSC during the relevant period, which included the recovery of line losses for the first time. MetEd’s proposed Tariff Supplement No. 5 (Supplement 5M) indicated that it sought to recover: (1) $421.6 million in transmission-related costs, including $144.8 million in under-recovered transmission costs, $10.7 million of which represented carrying charges, i.e., interest, between January 11, 2007, and March 31, 2008; and (2) $277.1 million in projected transmission cost increases. MetEd also presented, alternatively, Tariff Supplement No. 6 (Supplement 6M), which would amortize the under-collected transmission costs over a longer period of time. Penelec experienced under-collection and projected in *357 creased TSC costs of $3.8 million and $16.2 million, respectively and proposed Tariff Supplement No. 5 (Supplement 5P). Companies’ “under-collected” costs included the line losses assessed by PJM beginning June 1, 2007. 5
Customers, the OSBA, and the Office of Consumer Advocate (OCA) filed complaints against Companies’ Annual TSC Reconciliation Filings. The Commission initiated an investigation into Companies’ Reconciliation Filings, consolidated the complaints, and assigned the matters to the ALJ. Following an evidentiary hearing and briefing period, the ALJ agreed in his RD with Companies that they were entitled to recover line loss costs as transmission-related costs. Customers requested the ALJ to reopen the record to introduce the Companies’ Default Service Programs (DSP) Filings. Customers contended the DSP Filings established that line loss costs were generation-related costs and not recoverable through the TSC Riders. 6 The ALJ rejected Customers’ request by interim order and the DSP Filings were not introduced into the record. Customers, the OSBA, and OCA filed exceptions to the RD with the Commission.
After considering the exceptions, the RD, and the record made before the ALJ, the Commission entered the Order holding that, unlike congestion costs, line loss costs were generation-related and, therefore, not recoverable as transmission charges under Companies’ TSC Riders. The Commission noted that, unlike the proceedings on Companies’ 2006 RTP filings’ inclusion of con-gestión costs as transmission costs, the Companies failed to present testimony supporting its current contention that line loss costs should also be collected under the TSC Riders. (Order at 2.) The Commission rejected as overly simplistic Companies’ argument that because line losses occur during “transmission” those losses must be transmission costs. Instead, the Commission held that these losses are “energy” and that the price of such losses is related to the generation of that energy. (Order at 13.) The Commission likewise rejected Companies’ arguments that the Commission is bound by how PJM and the FERC characterizes these costs in PJM’s bills or in the OATT, holding that the fact that PJM changed how it billed these losses bears no relationship to whether the item is transmission- or generation-related and that the OATT clearly includes both transmission and generation charges. (Order at 13-14.) Rather, the Commission held that its determination was based on the nature of the service provided to the consumer and how they have been historically charged to the consumers. (Order at 13.) The Commission agreed with Customers that, historically, these types of losses have been included in generation costs and not transmission or distribution costs. (Order at 19-20.) The Commission noted that energy is lost both during transmission from the generator to the distribution point and in the distribution of the energy to the end-use consumers, but Companies do not argue, and Customers’ witness testified, that no utility has argued, to his knowledge, that distribution *358 system losses of energy should be collected in distribution rates. The Commission further held that it is within its discretion to allocate costs through a TSC Rider and that it is unreasonable for Companies to suggest that it is required to “rubber stamp” the recovery of such costs simply because they are imposed by PJM. (Order at 17.)
Additionally, the Commission held that, even if the line loss costs were considered to be transmission-related, Companies would not be entitled to retroactive recovery because they did not seek recovery at the first reasonable opportunity.
See MetEd I,
A. Whether the Commission’s findings of fact are supported by substantial evidence.
Companies first argue that the Commission’s Order should be reversed because the Commission’s findings of fact, including the Commission’s finding that line loss costs were and are being recovered in Companies’ generation rates, are not supported by substantial evidence. Essentially, Companies assert that, in rejecting the ALJ’s recommendation that line loss costs were transmission costs recoverable through the TSC Riders, the Commission ignored, disregarded, misstated, or misinterpreted the evidence in the record. According to Companies, the Commission, inter alia: (1) disregarded the Companies’ witness’s characterization of line losses as transmission costs, (MetEd Statement No. 3-R at 3, R.R. at 335a; Penelec Statement No. 3-R at 3, R.R. at 646a); (2) improperly relied on Companies’ proposed, but never implemented, restructuring plans from Companies’ 2006 RTP Proceeding and 1998 Restructuring Proceeding, rather than the approved 1998 Restructuring Agreement, to determine that Companies intended line losses to be included in generation costs; (3) mischaracterized the evidence submitted by Customers’ witness to support its finding that average line loss costs imposed by PJM *359 prior to June 1, 2007, were included in generation costs; and (4) misinterpreted the inclusion of line loss costs in the Locational Marginal Price (LMP), because this provides the appropriate price for power delivered to a specific location and, therefore, is related to the transmission of energy. Companies further assert that the Commission’s finding that line losses were not included in the TSC Riders is improper because the TSC Riders expressly include “all other future costs” imposed by PJM, and these costs were “future costs” imposed by PJM.
In rate case proceedings, such as this case, Section 315 of the Public Utility Code (Code), 66 Pa.C.S. § 315, places the burden of proof on the utility to establish the reasonableness of its rates. Pursuant to Section 102 of the Code, 66 Pa.C.S. § 102, a public utility’s rates include,
inter alia,
every individual charge that utility demands for any service offered, rendered, or furnished by the utility, whether received directly or indirectly. This Court has interpreted Section 315 as placing “the burden of proving the justness and reasonableness of a proposed rate hike squarely on the utility. It is well-established that the evidence adduced by a utility to meet this burden must be substantial.”
Lower Frederick Township Water Company v. Pennsylvania Public Utility Commission,
When reviewing an agency’s findings of fact, this Court will defer to those factual findings if they are supported by substantial evidence.
W.C. McQuaide, Inc. v. Pennsylvania Public Utility Commission,
The Commission and Customers assert that the Commission’s findings of fact, including its findings that line loss costs are generation-related and that Companies included line loss costs in their generation-related costs, are supported by substantial evidence. This evidence included the testimony of Stephen Baron, Customers’ expert witness, that Companies traditionally included line loss costs in their generation rates, stating that “[ljosses have always been recognized as a part of energy cost, whether computed on an average ... or marginal ... basis,” and that “[line] losses are a part of the cost of generation and are therefore subject to the generation rate cap.” (Customers’ Statement No. 1 at 16-17, R.R. at 672a-73a.) Mr. Baron examined how Companies unbundled their rates during Companies first Restructuring Proceeding, and noted that the evidence in that proceeding indicated that average line loss costs were “previously collected in generation rates and/or the Companies’ Energy Cost Rate.” (Customers’ Statement No. 1 at 16, R.R. at 672a.) He did not believe the fact that PJM changed its method of how it collected these costs, from average to marginal, warranted a change to the unbundling method applied during the Restructuring Proceeding or that PJM’s billing process makes line loss costs “a legitimate transmission cost, especially in light of the history of ratemaking in Pennsylvania and the Companies’ own unbundled cost analyses.” (Customers’ Statement No. 1 at 17, R.R. at 673a; Customers’ Statement No. 1-S at 4-5, R.R. at 763a-64a.) Mr. Baron compared line losses with distribution line losses, i.e., the loss of energy at the distribution point, and noted that, to his knowledge, no utility, including Companies, recovers distribution line loss costs as a distribution charge, but recovers those losses as part of the generation rate. (Customers’ Statement No. 1 at 17, R.R. at 673a.) He further testified that, based on his review of the testimony of one of Companies’ witnesses in the 2006 RTP Proceedings and an exhibit submitted by that witness, line loss costs were included in the Companies’ generation rates. (Customers’ Statement No. 1 at 17-18, R.R. at 673a-74a; Ex. SJB-6, R.R. at 757a.) In its brief to the ALJ, the OCA agreed with Mr. Baron’s interpretation of Exhibit, SJB-6, which shows that MetEd’s generation supply price was adjusted for line loss costs. (OCA’s Main Br. at 4, R.R. at 1191a.) Mr. Baron also reviewed Companies’ work papers from the 1998 Restructuring Agreement, Exhibits SJB-1S and SJB-2S, and indicated that these papers demonstrated that Companies’ proposed unbundled rates included energy-related costs in the production, i.e., generation, component. (Customers’ Statement No. 1-R at 4-5, R.R. at 763a-64a; Exs. SJB-1S and SJB-2S, R.R. at 773a-74a.)
*361 Additionally, Mr. Baron testified that, “[njotwithstanding the fact that the level of marginal losses are influenced by the structure and design of the physical transmission network, losses are energy costs and should be recovered in the generation charge, not the TSC.” (Customers’ Statement No. 1 at 16, R.R. at 672a (emphasis in the original).) Mr. Baron explained that line loss costs are a component of the LMP and are computed based on the marginal cost of increased power injections at each generator bus. (Customers’ Statement No. 1 at 10, R.R. at 666a.) He further testified that, because Companies participated in the proceedings before the FERC that resulted in PJM changing how it charged for line loss costs from average to marginal, Companies were aware in 2005 that the switch to calculating line loss costs on a marginal basis would increase their line loss costs but, despite this knowledge, they did not request approval to recover those costs as a part of their initial TSC calculations. (Customers’ Statement No. 1 at 12-14, R.R. at 668a-70a.) Mr. Baron opined that the “future other costs” provision relied upon by Companies does not permit the recovery of line loss costs in the TSC Riders because increased line loss costs were not “unknown” costs since the Companies were aware that PJM was going to charge for line loss costs on a marginal basis, a result Companies supported. (Customers’ Statement No. 1 at 15-16, R.R. at 671a-72a.)
In addition to Mr. Baron’s testimony, the Commission found that Customers provided persuasive evidence that, during the 2006 RTP Proceedings, line loss costs were included in Companies’ generation costs. That evidence consisted of statements and exhibits associated with the questioning of William D. Byrd during the 2006 RTP Proceedings, which indicated, inter alia, that Companies’ generation rate caps included costs for “line losses.” (Customers’ Exs. WDB-5 and FERC Financial Report, R.R. at 905a-09a.) Moreover, Companies’ witness, Frank Graves, testified that line losses are dissipated energy and that “dissipated energy has to be replaced by increased generation.” (MetEd Statement No. 3 at 20, R.R. at 285a; Penelec Statement No. 3 at 19, R.R. at 523a.) Finally, the TSC Riders did not specifically include “line losses” as one of the cost elements sought to be collected through those Riders. (Order at 2-3.)
The above-referenced testimony and evidence constitutes substantial evidence to support the Commission’s findings. The fact that the Commission chose to credit or give more weight to Customers’ evidence and expert witness’s testimony and opinions than Companies’ witnesses and evidence is not grounds for reversal; rather, those determinations are for the Commission as fact finder and cannot be reviewed on appeal.
Peak,
B. Whether the Commission erred as a matter of law in concluding that line loss costs are generation-related.
Companies next argue that the Order should be reversed because the Commission’s determination that line loss costs are not transmission-related costs recoverable under the TSC Riders: (1) is inconsistent with the Commission’s rationale and this Court’s holding in MetEd I; (2) violates the Filed Rate Doctrine and is inconsistent with the FERC’s characterization of line losses; and (8) is based on the Commission’s improper rebanee on Companies’ treatment of distribution line loss costs.
1. Section 2803 of the Competition Act and MetEd I
Section 2808 of the Competition Act provides the following:
Transmission and distribution costs — All costs directly or indirectly incurred to provide transmission and distribution services to retail electric customers. This includes the return of and return on facilities and other capital investments necessary to provide transmission and distribution services and associated operating expenses, including applicable taxes.
66 Pa.C.S. § 2803 (emphasis added). Neither the Code nor the Competition Act defines generation costs. The Commission is charged with enforcing the Code, including the Competition Act; therefore, the Commission’s interpretation of the Code, the Competition Act, and its own regulations are entitled to great deference and should not be reversed unless clearly erroneous.
Popowsky v. Pennsylvania Public Utility,
In
MetEd I,
this Court was asked to consider,
inter alia,
whether the Commission properly included “congestion costs”
9
in Companies’ TSC Riders as transmission costs under Section 2803. Customers argued that, because there is a generation cost associated with congestion, those costs should be considered generation costs and be subject to the generation rate cap; however, this Court held otherwise.
Id.,
(1) the [Companies] pay PJM for transmission services pursuant to the OATT, a transmission tariff; (2) the OATT includes a specific charge for transmission congestion, and the OATT bill that the [Companies] receive from PJM contains a separate charge for transmission congestion; (3) there would be no costs associated with PJM’s switching of electric generators but for the congestion on the transmission grid; and (4) congestion costs are reduced by transmission upgrades, not generation upgrades.
Id.
Companies argue that the PJM-imposed line loss costs at issue in this case are indistinguishable from the PJM-imposed congestion charges involved in MetEd I and satisfy the four-pronged test set forth by the Commission in MetEd I and adopted by this Court in that case. Companies contend that, like congestion charges: PJM identifies line loss costs as transmission services and bills them as such; the OATT contains a separate charge for line losses; and their expert testified that, like congestion charges, it is the transmission system that causes line losses, which can be reduced by upgrading the transmission systems. (MetEd’s Statement No. 3-R at 2-3, R.R. at 334a-35a; Penelec’s Statement No. 3-R at 3, R.R. at 646a.) Thus, according to Companies, because they satisfied the four prongs set forth in MetEd I, line losses must be considered transmission costs recoverable under the TSC Riders and the Commission’s contrary determination is erroneous.
The Commission did not err in holding that line losses are not transmission costs pursuant to Section 2803 of the Competition Act and
MetEd I.
The Commission interpreted the definition of transmission costs in Section 2803 of the Competition Act to exclude line loss costs because such costs are not incurred directly or indirectly to provide transmission service. Rather, line loss costs represent the generation-related costs associated with losses of energy as opposed to, for example, congestion costs, which represent the higher costs associated with providing reliable transmission service during times of peak usage. Additionally, OATT’s definition of “transmission line losses” is “the loss of energy in the transmission of electricity,” (Order at 14 (emphasis omitted)), and the Commission, in its interpretation of this term, chose to focus on the “loss of energy” factor of this definition rather than on the “transmission” factor, as Companies wanted. The Commission’s interpretation of the definition of “transmission costs” in Section 2803 as excluding line loss costs is not clearly erroneous and, thus, that interpretation is entitled to great deference.
Popowsky,
Companies contend that congestion costs and line loss costs are indistinguishable and, therefore, must be treated alike for the purposes of recovery under the TSC Riders. However, the Commission’s determinations in
MetEd I
and the case before us reveal that these costs are not indistinguishable. In
MetEd I,
the Commission found that congestion costs, which
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included the cost of upgrading the transmission facilities, were transmission-related costs under the facts and circumstances in that case and allowed Companies to recover such costs under the TSC Riders. We affirmed that determination because the costs were “directly or indirectly incurred to provide transmission services to customei's.”
MetEd I,
2. The Filed Rate Doctrine and FERC Precedent
Companies next argue that the Commission’s Order violates the Filed Rate Doctrine and is inconsistent with FERC’s determinations that line loss costs are transmission-related costs. According to Companies, FERC identifies line loss costs as transmission charges,
see Atlantic City Electric Company v. PJM Interconnection, LLC,
The Filed Rate Doctrine precludes,
inter alia,
state utility commissions from reviewing FERC-approved rates, such as
*365
the rates to be charged to a utility’s wholesale customers.
Nantahala Power and Light Company v. Thornburg,
Because FERC’s opinions have not expressly stated that line loss costs are transmission costs, there is no direct conflict between the Commission’s Order and FERC, unlike in
Nantahala Power & Light Company.
In
Nantahala,
FERC concluded that two electric utilities, Nant-ahala Power and Light Company (Nant-ahala) and Tapoco, Inc., subsidiaries of the Aluminum Company of America (Alcoa), were separate entities, but the state public utility commission decided that the two were “a single, integrated electric system.”
Id.,
Companies also argue that the Commission’s Order prevents them from recovering “trapped” transmission costs in contravention of
Nantahala,
in which the United States Supreme Court stated that “[w]hen FERC sets a rate between a seller of power and a wholesaler-as-buyer, a State may not exercise its undoubted jurisdiction over retail sales to prevent the wholesaler-as-seller from recovering the costs of paying the FERC-approved rate.... Such a ‘trapping1 of costs is prohibited.”
Id.
at 970,
the “deal” the utilities made for receiving billions of dollars in stranded costs[ 12 ] was that rates were frozen for 54 months and that the utility was going to bear the risk of any increased costs in providing service unless the increased costs fell within one of the Competition Act’s exceptions that allowed the utility to seek relief. The net effect of the Commission order [in Lloyd ] is to breach that regulatory bargain by im-permissibly allowing [the utility] to recover expenses incurred during the rate cap period that it agreed to bear by receiving stranded costs.
Id. at 1023. Thus, in exchange for recovering stranded costs, Companies made a deal in which they would bear the risk of any increased costs that occurred before the expiration of the generation rate cap.
Accordingly, we conclude that the Order was not inconsistent with FERC precedent, did not violate the Filed Rate Doctrine, and did not improperly prevent Companies from recovering trapped costs.
*367 3. Whether the Commission erred by improperly relying upon the treatment of distribution line loss costs.
Companies also argue that the Order must be reversed because the Commission erroneously based its determination that line loss costs were generation-related on the inclusion of distribution line loss costs in Companies’ retail generation credit. In addition to challenging the merits of this position, Companies also assert that this argument was not made by any of the parties below and should not have been advanced by the Commission. However, this issue was presented to the Commission. Mr. Baron, Customers’ expert witness, clearly testified regarding the treatment of distribution line loss costs and stated that no utility, including Companies, recover distribution line loss costs in their unbundled distribution charge, but these costs are recovered as part of the utility’s generation rates. (Customers’ Statement No. 1 at 17-18, R.R. at 673a-74a.) In elucidating this testimony, Customers focused on the fact that Companies treat a similar cost item, distribution line loss costs, as generation-related despite the fact that those losses occur during the distribution process.
On the merits of this issue, the Commission considered the treatment of distribution line loss costs to support its position that energy, i.e., what is lost through line losses, is not created by transmission but by generation and that energy losses, whether occurring through transmission or distribution, result in generation-related costs. The Commission noted the energy is also lost during its distribution to the end-use consumers and that such distribution line loss costs are recovered by the retail generation credit and not in distribution rates. (Order at 14-15.) The Commission held that this was MetEd’s position, which the Commission adopted, in Application of Metropolitan Edison Company for Approval of Restructuring Plan, 1998 Pa. PUC LEXIS 160 (June 30, 1998). We note that in Application of Metropolitan Edison, MetEd’s position was that the cost of distribution line losses, i.e., energy lost during distribution, “should be arranged for and paid for by the supplier” and that “line losses are generation related and should be recovered as a separate charge to enable suppliers to competitively procure this service if they wish to do so.” Id. at 168 (emphasis added). As the Commission points out in its Order, none of the parties in Application of Metropolitan Edison took exception to this position. The Commission relied upon this to support its parallel conclusions in the present matter that line losses, which occur during the transmission of energy, represent the amount of energy lost and that such losses result in generation-related costs not recoverable under the TSC Riders. We discern no error in the Commission’s reliance. 13
C. Whether the Commission committed other errors of law that require the Order’s reversal?
Companies next assert that the Commission’s Order should be reversed because the Commission violated Companies’ due process rights by considering evidence — the Companies’ DSP Filings— that was not made part of the record before the ALJ. According to Companies, the ALJ denied Customers’ request to reopen the evidentiary proceedings to allow Customers to submit those documents and,
*368
therefore, the Commission erred in rendering a decision based on facts not in the record.
Equitable Gas Company v. Pennsylvania Public Utility Commission,
The Commission responds that Companies presented no evidence to support their claims that they were denied a fair hearing, and Customers assert that Companies’ due process arguments are disingenuous given that the line loss argument was one of the few issues on which Companies did not prevail. Both the Commission and Customers contend that the Commission’s direction for Companies to place monies improperly collected as transmission costs in an account to mitigate future generation rate increases was within the Commission’s remedial discretion, consistent with its obligation to serve the best interests of the Commonwealth’s retail ratepayers, and was not evidence of a pre-deter-mined outcome.
Our review of the Order pertaining to whether line loss costs were generation-related or transmission-related reveals that the Commission did not consider the DSP Filings in making its determination that such costs were generation-related and not recoverable under the TSC Riders. (Order at 13-17.) The Commission did include the DSP Filings when describing the history of all the Companies’ filings with the Commission for this, as well as other proceedings before the Commission. (Order at 5.) The Commission also included Customers’ arguments pertaining to the effect of the DSP Filings. (Order at 12.) However, although the Commission included references to the DSP Filings in its Order, we conclude that the Commission did not rely on these facts, which were not included in the record before the ALJ, to determine that line loss costs were generation-related and not recoverable under the TSC Riders. 14 Thus, any error in referring to the DSP Filings was harmless.
We also discern no violation of Companies’ due process rights in the Commission’s failure to directly respond to the Dissenting Statement in the Order. Companies rely on
American Gas Association v. FERC,
For the foregoing reasons, we conclude that the Commission’s findings of fact are supported by substantial evidence and that the Commission did not abuse its discretion or commit an error of law in holding that line loss costs are generation-related costs and, therefore, not recoverable under Companies’ TSC Riders.
II. 632 C.D. 2010 — Carrying Charges
The OSBA’s Cross-Petition for Review relates to a different aspect of the Order, which purported to accept the ALJ’s RD approving the Companies’ request to collect carrying charges, i.e., interest, on the Companies’ net under-collection of transmission costs. In 2006, as a part of the Companies’ 2006 RTP filings, the Companies presented the Commission with a proposed plan to gradually increase their generation rates before the rate caps ended so as to ease the transition between the capped and uncapped period. Their plan was to obtain electricity from different generation companies, which would then assume responsibility for a portion of the Companies’ transmission costs. This would result in the Companies charging Pennsylvania customers higher generation rates, but lower transmission rates. To implement this plan, the Companies had to request the elimination of the existing generation rate caps from the Commission. The Companies included this request in their proposed TSC Riders filed in 2006, which sought, inter alia, to eliminate their existing generation rate caps and to move certain transmission-related costs, including congestion costs, from base rates into reconcilable TSC Riders. However, because the Companies were anticipating that the generators would pay part of the Companies’ transmission costs, the Companies did not include those transmission costs in the transmission rates for which they sought approval. In its January 2007 Order, the Commission approved the TSC Riders, but did not approve the elimination of the existing generation rate caps.
The Companies, therefore, had to “unwind” the hypothetical generation contracts upon which they had based their lower transmission costs. Thereafter, the Companies filed with the Commission a compliance filing indicating that they had “unwound” the proposed generation contracts, but they did not simultaneously increase their anticipated transmission costs, which had been lowered in the proposed filings in the expectation that the generation companies would pay transmission costs. In other words, even though the lower transmission costs included in the 2006 RTP filings were no longer accurate since the Companies, not the new generators, remained responsible for those costs, the Companies did not adjust their esti *370 mated transmission costs upward. This resulted in a shortfall of collected transmission costs, which the Companies sought to recover, with carrying charges, in their April 2008 TSC Rider reconciliation filings. The OSBA and Customers filed complaints, objecting to, inter alia, the Companies’ collection of carrying charges on the transmission costs related to the unwinding of the generation contracts and line loss costs.
After an investigation and an evidentia-ry hearing, the ALJ recommended in the RD that the Companies be permitted to collect the carrying charges on the net amount of under-collected transmission costs. (RD at 21, 45-46, R.R. at 1840a, 1364a-65a.) Although the OSBA and Customers challenged the carrying charges associated with the under-collection of transmission costs based on line loss costs and those based on the unwinding of the generation contracts separately, the ALJ did not discuss each type of carrying charge separately. The ALJ initially concluded that the OSBA had waived its arguments regarding the carrying charges associated with the line loss costs because the OSBA raised this issue for the first time in its brief. (RD at 21, 45-46, R.R. at 1840a, 1364a-65a.) The ALJ did not address the OSBA’s arguments regarding the carrying charges associated with the unwinding of the generation costs. Rather, the ALJ indicated that, after considering Customers’ arguments, there were no legal impediments to allowing the Companies to collect the carrying charges on the net under-collected transmission charges and that the question was whether the inclusion of these carrying charges was unjust, unlawful, and unreasonable. (RD at 21, 45-46, R.R. at 1340a, 1364a-65a.) The ALJ rejected the Customers’ argüment that the Companies should not be allowed carrying charges because of their failure to more accurately forecast their transmission costs as being “punitive in nature.” (RD at 21, 45-46, R.R. at 1340a, 1364a-65a.) The ALJ concluded that the Companies presented evidence that adequately explained the circumstances surrounding the under-collection of the transmission costs, and noted that the claim for carrying charges is on the total net under-collection, and not on any specific under-collection of a specific cost element of the TSC. (RD at 21, 45-46, R.R. at 1340a, 1364a-65a.)
The OSBA and Customers filed exceptions, which the Commission “granted consistent with this Opinion and Order.” (Order at 23.) The Commission also adopted the ALJ’s RD, as modified, “consistent with this Opinion and Order.” (Order at 23.) The Commission’s Order neither makes any specific reference to the OSBA’s exceptions to the ALJ’s allowance of carrying charges nor to the ALJ’s RD regarding the allowance of the carrying charges on the shortfall due to the unwinding of generation contracts, except to say that “[a]ny argument that is not specifically addressed herein shall be deemed to have been duly considered and denied without further discussion.” (Order at 11.) The OSBA now petitions this Court for review on this issue.
The OSBA asserts that the Commission violated Section 703(e) of the Code, 66 Pa.C.S. § 703(e) (requiring that the Commission’s findings be sufficient to enable a court on appeal to determine questions at issue and whether the Commission gave proper weight to the evidence), when it did not specifically address the OSBA’s Exception No. 2
15
and denied
*371
that Exception implicitly by stating “[a]ny argument that it is not specifically addressed herein shall be deemed to have been duly considered and denied without further discussion.” (Order at 11.) Additionally, the OSBA asserts,
inter alia,
that, to the extent that the Commission simply adopted the ALJ’s RD, the RD on this issue is likewise insufficiently detailed to satisfy the requirements of Section 708(e) and this Court’s decision in
National Fuel Gas Distribution Corporation v. Pennsylvania Public Utility Commission,
In response, both the Commission and the Companies argue that the Commission’s Order complies with Section 703(e) because this issue was fully addressed during the evidentiary and briefing stage of the proceeding, the RD was issued, the RD complied with Section 703(e), and the Commission adopted the RD on this issue in its entirety. The Commission and the Companies acknowledge that the RD may not have expressly rejected the OSBA’s specific arguments, but the RD did expressly reject similar arguments made by Customers. The Commission is not required to expressly consider all of the. arguments set forth by the parties in its Order.
Wheeling & Lake Erie Railway Company v. Pennsylvania Public Utility Commission,
Section 703(e) of the Code provides, in pertinent part:
(e) Decisions by commission. — After the conclusion of the hearing, the commission shall make and file its findings and order with its opinion, if any. Its findings shall be in sufficient detail to enable the court on appeal, to determine the controverted question presented by the proceeding, and whether proper weight was given to the evidence.
Id.
(emphasis added). In
NFG,
we held that the Commission’s failure to provide any analysis to support its decision on a particular issue or a sufficient explanation for changing its position from a prior, factually similar situation prevented this Court from performing judicial review.
NFG,
In
DSM,
the Commission was asked to consider whether to allow utilities to amortize certain capital investments and collect interest on the unamortized balance for amortized expenses.
Id.
at 525-26, 1991 Pa. PUC Lexis 207 at *31-32. The Commission concluded that, in unusual cases, the amortization of certain costs is appropriate for an extraordinarily large investment.
Id.
The Commission noted that, “[although we have often refused to allow interest or a return on the unamortized balance for amortized expenses
(Butler Township Water Company v. Pennsylvania Public Utility Commission,
81 [Pa.Cmwlth.] 40,
Section 1301 of the Code, 66 Pa.C.S. § 1301, requires that every rate made or demanded by a public utility shall be just, reasonable, and in conformity with the regulations or orders of the Commission. Id. Thus, as recognized by the ALJ in the RD, the main question to be answered regarding the Companies’ collection of carrying charges on the shortfall that resulted from the unwound generation contracts is whether those carrying charges are just, reasonable, and in conformity with the regulations and orders of the Commission, i.e., lawful. (RD at 21, 45-46, R.R. at 1340a, 1364a-65a.)
The OSBA asserts that the ALJ could not properly make a determination regarding the justness, reasonableness, and lawfulness of the Companies’ request without considering its evidence and arguments, particularly its argument that allowing the Companies to charge current customers carrying charges created an inter-generational mismatch, 16 (see OSBA Statement *373 No. 2 at 1-3, R.R. at 784a-86a), as this argument was different from those made by Customers. Because the ALJ’s RD, adopted by the Commission on this issue, neither offers an explanation or consideration of the OSBA’s arguments and evidence nor does it address the two types of carrying charges separately, we agree with the OSBA that the part of the Order that relies on the RD’s rationale for allowing carrying charges on the shortfall resulting from the unwound generation contracts is insufficiently specific to allow this Court to engage in meaningful judicial review. Therefore, in this regard, the Order does not comply with Section 703(e).
We first note that there are two types of shortfalls involved in this matter: (1) the shortfalls associated with line loss costs; and (2) the shortfalls resulting from the unwound generation contracts. Although the ALJ found that the OSBA waived its arguments regarding the carrying charges associated with line loss costs because it raised the issue for the first time in its main brief, i.e., after the close of evidence, the ALJ did not state that OSBA waived its arguments pertaining to the carrying charges associated with the unwound generation contracts. Indeed, had the ALJ done so, we would have had to reject such finding because the OSBA’s expert witness, Brian Kalcie, specifically testified about this issue in his sur-rebuttal statement. (OSBA Statement No. 2 at 1-3, R.R. at 784a-86a.)
Notwithstanding the OSBA’s evidence and repeated arguments on why allowing carrying charges on the shortfalls related to the unwound generation contracts would result an inter-generational mismatch, the ALJ made no reference to the OSBA’s position in the RD. The position arguably raises legitimate questions about the reasonableness and justness of the proposed collection of carrying charges. The OSBA reiterated this position in its main brief to the ALJ after the close of the record. (OSBA’s Main Br. at 5, 12, R.R. at 1201a, 1208a.) Nevertheless, the ALJ addressed only Customers’ arguments in the RD, stating that he “considered those arguments,” which focused on the Companies’ failure to properly estimate and/or anticipate the increased transmission costs associated with marginal line losses and the unwound generation contracts, and rejected those arguments as “punitive in nature.” (RD at 21, 45-46, R.R. at 1340a, 1364a-65a.) The ALJ held that these arguments did not legally preclude the collection of carrying charges where the Companies provided a reasonable explanation for its shortfall and, therefore, the ALJ authorized carrying charges on the net under-collected transmission costs. (RD at 21, 45-46, R.R. at 1340a, 1364a-65a.)
Although we agree with the Commission that it is not required to expressly consider each and every argument a party raises,
Wheeling & Lake Erie Railway Company,
Moreover, the ALJ did not separately address the two types of shortfalls involved in this matter by cause, i.e., the shortfalls associated with line loss costs versus those resulting from the unwound generation contracts. Given our holding affirming the Commission’s determination that the line loss costs are not transmission costs and, therefore, are not recoverable in the TSC Riders, the carrying charges associated with the line loss costs likewise may not be recovered. However, because the ALJ combined its analysis on both types of the carrying charges, we have no way of determining whether that analysis supports the Commission’s determination on the remaining issue, whether the Companies’ request for carrying charges associated with the unwinding of the generation contracts is just, reasonable, and lawful. We note that, if the Commission determines that the Companies are allowed to collect carrying charges, those amounts should reflect only those under-collected transmission costs associated with the unwinding of the generation contracts, not the line loss amounts.
The Commission and Companies argue that
NFG
does not require remand. Although
NFG
is factually distinguishable from this case, the import of
NFG
is not its facts, but its holding that the Commission must provide this Court with sufficient analysis to engage in appellate review. As in
NFG,
here, we “simply cannot tell as a matter of law whether the [Commission] abused its discretion or not.”
NFG,
Accordingly, the Order is hereby: (1) affirmed to the extent that it holds that line loss costs are not transmission costs and, therefore, not recoverable under the TSC Riders and that the carrying charges associated with line loss costs are likewise not recoverable; and (2) vacated to the extent that it allows the Companies to collect carrying charges on the under-collected transmission costs associated with the unwinding of the generation contracts. We remand the matter to the Commission to expressly consider the OSBA’s Exception No. 2 in a manner consistent with this opinion.
ORDER
NOW, June 14, 2011, the Order of the Pennsylvania Public Utility Commission (Commission) is hereby: (1) affirmed to the extent that it holds that line loss costs are not transmission costs and, therefore, not recoverable under Metropolitan Edison Company’s and Pennsylvania Electric Company’s (Companies) TSC Riders and that the carrying charges associated with line loss costs are likewise not recoverable; and (2) vacated to the extent that it allows the Companies to collect carrying charges on the under-collected transmission costs associated with the unwinding of the generation contracts. We remand the matter to the Commission to expressly consider William R. Lloyd, Jr., Small Business Advocate’s Exception No. 2 in a manner consistent with this opinion.
Jurisdiction relinquished.
Notes
. Line losses represent the amount of energy that is lost between the generation facility and the delivery of that energy at its end point.
. The OSBA asserts that, should this Court reverse the Commission’s determination as to line losses, we should remand the matter to the Commission to consider whether Companies should be permitted to collect carrying charges on these costs.
.Customers take no position with regard to the OSBA's Cross-Petition for Review at 632 C.D. 2010. (Customers’ Br. at 4 n. 1.)
. PJM is a regional transmission organization (RTO) that coordinates the movement of wholesale electricity in 13 states (including Pennsylvania) and the District of Columbia.
. The line losses sought to be recovered are: $38,655,803 in past line losses, plus $2,548,445 in carrying charges for MetEd customers; and $7,210,687 in past line losses, plus $413,673 in carrying charges for Penelec customers.
. On February 20, 2009, Companies filed the DSP Filing proposing to modify the way transmission costs were collected from consumers, eliminating the TSC Rider, and replacing it with a NITS Rider. Under this plan, the costs that were recovered using the TSC Rider, congestion, line losses, and risk management costs, would be recovered through Companies' default generation rates.
. Companies requested, and received, a stay from the Commission’s suspension of the tariff modification requirement and the Commission allowed Companies to continue collecting marginal losses, with interest, through the end of 2010 and to commence giving refunds on January 1, 2011 or a decision is issued from this Court, whichever was sooner. (Commission Order, March 25, 2010.)
. This Court's review of Commission's orders is limited; "[w]e must determine whether constitutional rights were violated, an error of law was committed or whether the findings, determinations or order are supported by substantial evidence.”
Popowsky II,
. Congestion occurs when there is not enough transmission capability to support all requests for transmission services and, in order to ensure reliability, transmission system operators re-dispatch generation to prevent transmission lines from being overloaded. Pennsylvania Public Utility Commission v. Metropolitan Edison Company, 2006 Pa. PUC Lexis 116 *133-35. In the PJM, the cost of congestion is defined as the net cost of replacement power that must be supplied by other means to make up for the deliveries that cannot be executed as requested. Id.
. Companies cannot recover generation-related costs through their transmission rates in order to circumvent the mandated generation rate cap.
ARIPPA v. Pennsylvania Public Utility Commission,
. Unlike Nantahala, Tapoco, whose only customer was Alcoa, did not purchase additional power from the TVA.
Nantahala,
. Stranded costs essentially represent "the difference between the amount of revenue that could have been recovered in a regulated market and those recoverable under” deregulation.
Lloyd,
. Because we conclude that the Commission did not err or abuse its discretion in determining that the line loss costs at issue here are generation-related, we will not address Companies’ assertion that the Commission erred in holding that, even if the line loss costs were transmission-related, Companies would not be entitled to retroactive recovery.
. To the extent that the Commission mentioned the DSP Filings in its analysis on retroactive recovery, it did so only to point out that the Companies' filings are just "one data point that acknowledges Commission precedent with regard to these Companies and this issue.” (Order at 18.) We do not believe that this brief mention constitutes the Commission rendering a decision based on facts outside the record,
Equitable Gas Company,
. In Exception No. 2, the OSBA asserted, inter alia:
Exception No. 2: The AU erred in recommending that the Companies be permit *371 ted to recover interest on the claimed transmission costs resulting from the unwinding of generation contracts.
The ALJ did not explicitly recommend that the Companies be permitted to collect carrying charges on the under-recovery of the Companies' transmission costs that resulted from the unwinding of generation contracts after the Commission rejected an attempt by the Companies to break the generation rate caps. However, he made an implicit recommendation to that effect when he rejected [Customers’] proposed disallowance of carrying charges, in general.
(OSBA's Exceptions at 19, R.R. at 1500a.) In Exception No. 1, the OSBA challenged the allowance of carrying charges associated with the line losses. Because the Commission concluded that line losses were not transmission costs recoverable under the TSC Rider, a conclusion that we affirm, the carrying charges associated with the line losses are likewise not recoverable under the TSC Rider.
. Brian Kalcic, the OSBA’s expert, testified in his sur-rebuttal statement regarding inter-generational mismatch. He stated:
Cost shifting across time periods may result in inter-generational cost shifting among ratepayers, depending on the time period over which costs are recovered.
For example, it is likely that some of the ratepayers on whose behalf such transmission costs were incurred are no longer customers of either [of the Companies] and those customers will, therefore, avoid having to pay any of those costs. On the other hand, it is likely that some of the current ratepayers [of the Companies] will be re *373 quired to pay such transmission costs even though they were not ratepayers of either Company at the time costs were incurred.
[The Companies' expert] argues that the actual time period over which costs are recovered is immaterial to ratepayers as long as the present value of the alternative payment streams is the same. That conclusion may be true in the case where the population of the ratepayers remains unchanged over time. However, as previously discussed, shifting cost recovery across time periods may result in inter-generational cost shifting among ratepayers. Such an outcome would not be "fair” to all ratepayers.
(OSBA Statement No. 2 at 1-3, R.R. at 784a-86a (emphasis in the original).)
. These are the amounts Mr. Baron testified were the amounts of carrying charges at the time he testified in November 2008. (Customers’ Statement No. 1 at 24-25, R.R. at 680a-81a.) Thus, diese numbers likely have only increased since Mr. Baron testified.
