New Orleans Public Service, Inc. asks us to reverse the district court’s determination that the Council’s retail rate order is not “facially” preempted by federal law, specifically a wholesale rate order the Federal Energy Regulatory Commission made under the Federal Power Act. The Council’s order prevented NOPSI from recovering, in its retail rate, wholesale costs FERC ordered it to incur as a result of its participation in building the Grand Gulf 1 nuclear reactor in Port Gibson, Mississippi. In the alternative, NOPSI asks us to reverse the district court’s decision to stay NOPSI’s remaining claims in light of pending state court proceedings. The remaining claims include an allegation that the stated reasons underlying the Council’s order were a pretext for an impermissible attack on FERC’s order. We affirm the district court’s order, rejecting NOPSI’s “facial” preemption challenge, in part because of the reading the Supreme Court gave the Council’s order on a previous appeal. We further hold that the district court did not abuse its discretion in staying decision of the remaining claims, although it did not acknowledge the relevance of the Council members’ motivation to NOPSI's pretext claim in making that decision. Our reading of the Court’s opinion on the previous appeal compels us to conclude that the pretext claim cannot succeed in the face of a determination that the stated reasons underlying the Council’s order were sufficiently supported by the evidence; and the state trial court had already determined that they were. There was thus no substantial federal issue remaining in the case, and the district court’s order was not otherwise an abuse of discretion.
I.
This case has produced several judicial opinions, including three from this court. At each juncture the case was in a different posture, with different issues. This opinion is no exception. Thus, we repeat the facts for perspective.
A.
NOPSI is a producer, wholesaler, and retailer of electricity, providing its retail services to the city of New Orleans. Along with Arkansas Power and Light, Mississippi Power and Light, and Louisiana Power and Light, it is a wholly owned operating subsidiary of Middle South Utilities, Inc. 1 MSU operates an integrated “power pool” in which NOPSI and the three other power companies transmit the electricity they produce to a central dispatch center, and each draws back the power it needs to meet customer demand.
Through the 1950’s and into the 1960’s, most of the MSU system’s generating plants were fueled with oil or gas. In the late 1960’s, MSU sought to meet projected increases in demand by adding coal-fired and nuclear energy powered generating plants. Originally, MSU planned for each of the power companies to construct one or more nuclear facilities. Mississippi Power and Light was charged with constructing two plants at Port Gibson, Mississippi, to be known as Grand Gulf 1 and 2. The Grand Gulf project quickly proved too burdensome for one company, however. MSU created another subsidiary, separate from the power companies, known as Middle *996 South Energy, Inc. to finance, own, and operate the Grand Gulf plants. 2 In 1974, MSE in turn contracted with the power companies to finance the project. The companies agreed to pay for the construction of the plants in exchange for the right to their output. The estimated construction cost at that time was $1.2 billion.
As the project progressed, consumer demand for electric power proved to be much lower than MSU and the power companies had expected. At the same time, regulatory delays, enhanced construction requirements resulting from the Three Mile Island accident, and high inflation led to spiraling costs on the Grand Gulf project. As a result, MSE suspended construction of Grand Gulf 2, although it continued to build Grand Gulf 1. The cost of completing Grand Gulf 1 alone eventually exceeded $3 billion.
The power companies considered various methods to allocate the cost of Grand Gulf in light of these developments. In 1982, MSU filed a Unit Power Sales Agreement with the Federal Energy Regulatory Commission, which set out the shares of Grand Gulf 1 output each company was required to purchase in order to pay the construction costs. Arkansas Power and Light, which had finished its own nuclear plants, was not obligated to purchase any Grand Gtilf power. Louisiana Power and Light, which had not finished its plant, was obligated to purchase 38.57%. Mississippi Power and Light was obligated to purchase 31.63%, and NOPSI 29.8%. MSU also filed a new System Agreement with FERC, which set forth the terms and conditions for coordinated operations and wholesale transactions among the four companies, but did not deal with the Grand Gulf costs.
FERC assigned the agreements to two separate Administrative Law Judges for the statutorily required task of determining whether they were just and reasonable. Both judges held that the failure to distribute the Grand Gulf costs among all the members rendered the agreements unduly discriminatory; ALJ Head further held that these costs should be allocated in proportion to each company’s relative system demand.
Middle South Services, Inc.,
30 F.E.R.C. H 63,030, pp. 65,170-65,173 (1985) (System Agreement);
Middle South Energy, Inc.,
26 F.E.R.C. ¶ 63,044, pp. 65,105-65,108 (1984) (Unit Power Sales Agreement) (AU Head). FERC consolidated the proceedings for review, and determined that an adjustment of the shares allocated in the Unit Power Sales Agreement was all that was necessary to render both agreements just and reasonable. FERC reduced NOPSI’s share from 29.8% to 17%. The decrease did not satisfy the New Orleans City Council, however, which had argued for a 9% share for NOPSI.
3
The D.C. Circuit ordered FERC to reconsider the allocations.
Mississippi Industries v. FERC,
Although its order did not expressly discuss the prudence of the project, FERC implicitly accepted the uncontroverted testi
*997
mony of MSU executives, who explained why they believed the decision to construct and complete Grand Gulf 1 was sound. It also approved one of the ALJ’s findings to that effect.
See Mississippi Power and Light v. Mississippi ex rel. Moore,
B.
The Council is the local ratemaking body with final authority over NOPSI’s retail rates. See 16 U.S.C. § 824(b); La.Rev.Stat. Ann. §§ 33:4405, 33:4495 (West 1988); see also the New Orleans Home Rule Charter § 4-1604. NOPSI applied to the Council for a retail rate increase to cover the increase in its wholesale rates resulting from the FERC allocation. The increase NOPSI sought would have resulted in an immediate 60% increase in retail rates. The Council denied an immediate rate adjustment, explaining that a public hearing was necessary to determine the “legality” and prudence of NOPSI’s decision to enter the Grand Gulf contracts.
NOPSI responded by filing an action in the district court, requesting injunctive and declaratory relief, on the theory that FERC’s order required the Council to allow NOPSI to pass all of the allocated costs to its retail customers. The district court dismissed the case, holding that under the Johnson Act, 28 U.S.C. § 1342, it lacked jurisdiction to proceed, and noted that if it had had jurisdiction, it would have abstained pursuant to
Burford v. Sun Oil Co.,
On October 10, 1985, while NOPSI I was pending before us, the Council began its investigation. In a resolution, the Council said it would examine all aspects of NOPSI’s participation in the Grand Gulf projects, including Grand Gulfs impact on other power supply opportunities, and NOPSI’s efforts to minimize its total cost exposure for the Grand Gulf project. The resolution specifically provided that, in determining the appropriate retail rate increase, the Council would not seek to invalidate any of the agreements surrounding Grand Gulf 1 or to order NOPSI to pay MSE a wholesale rate other than that approved by FERC.
In November 1985, with
NOPSI I
still pending before us, NOPSI filed
NOPSI II
in the district court, seeking to enjoin the Council from preventing the pass-through. The district court dismissed on ripeness grounds, and in the alternative abstained. We affirmed on the ripeness issue.
NOPSI v. The Council of the City of New Orleans,
The Council completed its investigation on February 4, 1988, and entered a final order disallowing some of the requested increase. The order prevented NOPSI from passing through $135 million of the Grand Gulf costs. This meant that, instead of passing through the full 17% FERC required it to bear, NOPSI could pass through only 14%, the amount the Council had argued NOPSI should bear in the FERC proceedings.
NOPSI then filed this action
(NOPSI III)
in the district court, and a parallel state action challenging the order. In the district court, NOPSI argued the Council’s order was preempted under
Nantahala Power and Light Co. v. Thornburg,
On remand, NOPSI again argued that the Council’s order was preempted, because on its face it impermissibly contradicted the FERC order; or alternatively, that the Council’s reasons for denying a pass-through were a pretext to attack the
*998
FERC allocation. The district court held that the Council’s order was not “facially” preempted, and stayed the rest of the case because the Louisiana trial court had already issued a judgment in the Council’s favor in the parallel state proceedings. The state trial court held that the Council’s order was supported by substantial evidence. The matter is now pending in the state court of appeals. The district court rested its decision to stay on
Colorado River Water Conservation District v. United States,
II.
We first consider whether the district court properly determined that the Council’s order was not “facially” preempted. The preemption doctrine is not without its difficulties. At least as a point of departure it is fair to observe that federal law may preempt state law in three ways. First, Congress may expressly define the extent to which it intends to preempt state law. Second, Congress may only signal intent to occupy an area. Third, state laws that conflict with federal laws are preempted, even if Congress has not expressly preempted them or otherwise signaled its intent to occupy the area.
Michigan Canners and Freezers Association v. Agricultural Marketing and Bargaining Board,
The Council argues that the Supreme Court foreclosed this claim in
NOPSI III.
As the Council concedes, the Court did not do so explicitly. Indeed, the Court reversed our holding on
Burford
abstention because the facial preemption challenge, limited as it was to the “four corners of the Council’s retail rate order,” would not unduly intrude into state processes or undermine the state’s ability to maintain uniformity in retail rate regulation.
[W]e do not have to decide the matter here, since the proceeding and order at issue do not meet that description. The Council has not sought directly to regulate interstate wholesale rates; nor has it questioned the validity of the FERC-pre-scribed allocation of power within the Grand Gulf system, or the FERC-pre-scribed wholesale rates; nor has it reexamined the prudence of NOPSI’s agreement to participate in Grand Gulf 1 in the first place. Rather, the Council maintains that it has examined the prudence of NOPSI’s failure, after the risk of nuclear power became apparent, to diversify its supply portfolio, and that finding that failure negligent, it has taken the normal ratemaking step of making NOPSI’s shareholders rather than the ratepayers bear the consequences. Nothing in this is directly or even indirectly foreclosed by the federal statute, the regulations implementing it, or the case law applying it. There may well be reason to doubt the Council’s necessary *999 factual finding that NOPSI would have saved money had it diversified. But we cannot conclusively say it is wrong without further factual inquiry — and what requires further factual inquiry can hardly be deemed “flagrantly” unlawful for purposes of a threshold abstention determination.
A.
NOPSI’s facial preemption claim, as well as its pretext claim, is grounded in an aspect of the filed rate doctrine, which the Court established in
Montana-Dakota Utilities Co. v. Northwestern Public Service Co.,
The Court has since held that this aspect of the filed rate doctrine applies to state courts as well, not as a rule of administrative law, as in the federal context, but rather as a means of enforcing the Supremacy Clause.
See, e.g., Arkansas Louisiana Gas Co. v. Hall,
Several state courts have held that a state utility commission setting retail rates must allow, as reasonable operating expenses, costs incurred as a result of paying a FERC-determined wholesale price.
See, e.g., Narragansett Electric Co. v. Burke,
In
Nantahala,
Nantahala Power and Light Co. and Tapoco, wholly owned subsidiaries of Alcoa, owned hydroelectric plants, which they allowed the TVA to operate. In exchange, the TVA provided them jointly with a fixed supply of low-cost power. Nantahala also bought high-cost power from the TVA’s power grid. An agreement between Nantahala and Tapoco gave Nantahala 20% of the low-cost power, and Nantahala calculated its wholesale and retail rates on that basis. FERC reviewed this agreement in a wholesale ratemaking proceeding, and determined that the agreement was unfair and that Nantahala was entitled to 22.5% of the low cost power. FERC ordered Nantahala to use that figure in calculating its wholesale rates. When Nantahala later applied to the North Carolina Utilities Commission for a retail rate increase, the NCUC essentially deter
*1000
mined that the agreement was more unfair to Nantahala than FERC said it was, and that Nantahala was entitled to 24.5% of the low cost power. It required Nantahala to calculate its retail rates on that basis. The Court, citing the state court cases noted above, held the NCUC’s order preempted by FERC’s order, because “a State may not conclude in setting retail rates that the FERC-approved wholesale rates are unreasonable. A State must rather give effect to Congress’ desire to give FERC plenary authority over interstate wholesale rates, and to ensure that the States do not interfere with this authority.”
The Court noted that, in
Narragansett
and
Public Service Co. of Colorado,
the state courts held that an increase in FERC-ordered wholesale rates need not always lead to a corresponding increase in retail rates. Retail rates might increase less sharply than wholesale rates, or even go down, if the utility’s costs
other than
those attributable to the FERC-approved wholesale rates decrease.
Narragansett,
The Court also noted that, in certain circumstances, a utility’s purchase of a particular quantity of high cost power at FERC-approved rates might be unreasonable, if lower cost power were available from another source.
Id.
at 972,
Mississippi Power and Light
involved the same FERC allocation that is at issue here. The UPSA assigned MP & L a 31.63% share of Grand Gulf l’s costs; FERC changed that to 33%. The Mississippi Public Service Commission originally refused to allow MP & L to pass through any of these costs, but then reversed itself and allowed MP & L to pass all of them through. It did so because it concluded that MP & L would otherwise become insolvent. The Mississippi Supreme Court reversed that order, holding that the Public Service Commission had no authority under state law to allow the pass-through without conducting a prudence review, and that such a review was not preempted by federal law. The court remanded the case to the Public Service Commission to “determine whether MP & L, [MSE], and MSU acted reasonably when they constructed Grand Gulf 1, in light of the change in demand for electric power in this state and the sudden escalation of costs.”
Mississippi ex rel. Pittman v. Mississippi Public Service Commission,
The Court reversed, holding that “our decision in
Nantahala
rests on a foundation that is broad enough to support the order entered by FERC in this case and to require the MPSC to treat MP & L’s FERC-mandated payments for Grand Gulf costs as reasonably incurred operating expenses for the purpose of setting MP & L’s retail rates.”
In sum, then, there were several things the Council was not entitled to do in the prudence inquiry. It could not base any disallowance on NOPSI’s purported imprudence in deciding to participate in Grand Gulf in the first place. That is the holding of Mississippi Power and Light. The Council could not, of course, challenge the FERC price as inappropriate. That is the point of the entire line of filed rate doctrine cases. The Council also could not penalize NOPSI for buying an unreasonably high amount of Grand Gulf power, because FERC allocated the power NOPSI had to buy. NOPSI had no legal right to take any less. Nantahala established that the Pike Co. line of cases did not apply to facts like ours; Mississippi Power and Light established specifically that they do not apply to our facts. We therefore must determine exactly what the Council did, and whether, in light of the cases, it was entitled to do it.
B.
We have noted that the Supreme Court has already characterized the Council’s order as follows:
The Council has not sought directly to regulate interstate wholesale rates; nor has it questioned the validity of the FERC-prescribed allocation of power within the Grand Gulf system, or the FERC-prescribed wholesale rates; nor has it reexamined the prudence of NOPSI’s agreement to participate in Grand Gulf 1 in the first place. Rather, the Council maintains that it has examined the prudence of NOPSI’s failure, after the risk of nuclear power became apparent, to diversify its supply portfolio, and that finding that failure negligent, it has taken the normal ratemaking step of making NOPSI’s shareholders rather than the ratepayers bear the consequences.
NOPSI III,
C.
Nantahala and Mississippi Power and Light reaffirmed the well-established principle that if FERC has jurisdiction over a subject, states cannot have jurisdiction over it. Mississippi Power and Light established that FERC had jurisdiction to determine whether the various utilities acted prudently in deciding to participate in the Grand Gulf venture, and that the states were therefore precluded from conducting prudence inquiries on that subject. The order before us presents a variation of that question. We must decide whether FERC has jurisdiction to determine whether NOPSI acted prudently once the Grand Gulf project was underway. To do so, we must determine whether the Federal Power Act grants FERC this jurisdiction.
The first step in making this determination is to decide whether FERC has asserted this jurisdiction. We defer to FERC’s
*1002
construction of the act if it does not violate the act’s plain meaning and is a reasonable interpretation of silence or ambiguity.
See Mississippi Power and Light,
We therefore must determine only whether this is a matter that Congress has nevertheless committed to FERC’s exclusive jurisdiction. In doing so, we must presume that state law is not preempted, as this is an area traditionally regulated by the states under their historic police powers. Courts must assume that these state powers were not to be superseded by the Act in the absence of clear and manifest Congressional purpose.
California v. ARC America Corp.,
Further, we are convinced that the Court in
NOPSI III
did not believe the Council could not regulate NOPSI’s activities in this regard. It said that nothing in the Council’s order was directly or even indirectly foreclosed by prior preemption decisions.
NOPSI III,
III.
As we have noted, NOPSI has not rested its preemption argument solely on *1003 the Council order’s facial invalidity. NOPSI also argues that, whatever the order’s facial validity, the reasons given for denying the pass through were pretexts for the Council members’ true, but impermissible, objective of attacking both the FERC allocation and NOPSI’s imprudence in participating in Grand Gulf in the first place. We are unable to locate an express reference to this aspect of NOPSI’s argument in the district court’s opinion. 7
In its brief and at oral argument, the Council urged that NOPSI never raised this pretext claim in its complaint. Whether we would reach the same conclusion on a fresh reading of the complaint is not relevant, however, because the Supreme Court has already held that NOPSI did raise this claim in its complaint.
NOPSI III,
The Council further argued that the district court’s decision to stay was justifiable under
Colorado River
and
Moses H. Cone Memorial Hospital,
despite the failure to consider expressly the relevance of motivation to the pretext claim. We review the decision to stay only for an abuse of discretion.
Moses H. Cone Memorial Hospital,
The Council maintained that, as long as there was sufficient evidence to support the Council’s stated reasons for denying the pass through, the pretext claim must fail, that there was no difference between the pretext claim and the state law challenges to the order’s validity. Since the state trial court had already decided the state law challenges, and thereby already passed, albeit indirectly, on the pretext claim, the Council contended the district court properly concluded that, while federal law technically provided the rule of decision, there were no substantial federal is *1004 sues remaining in the case, so the court was not compelled to exercise its jurisdiction on that basis. The Council further argued that the district court’s order was not otherwise an abuse of discretion.
A.
In NOPSI III, the Court described the pretext claim as follows:
Unlike the facial challenge, [the pretext] claim cannot be resolved on the face of the rate order, because it hinges largely on the plausibility of the Council’s finding that NOPSI should have, and could have, diversified its supply portfolio and thereby lowered its average wholesale costs. See n. 2, supra. Analysis of this pretext claim requires an inquiry into industry practice, wholesale rates, and power availability during the relevant time period, an endeavor that demands some level of industry-specific expertise.
Adverting to the merits, the District Court commented: “[T]he Council faults NOPSI not for buying a ‘pig in a poke’ but for failing to find a sucker to buy it when the faux pas became apparent.” 11
Having reached this conclusion, we cannot reverse the district court for failing expressly to consider the relevance of motivation to the pretext claim in deciding to stay its hand. The pretext claim has little functional difference from the state court’s sufficiency of the evidence review, and motivation is not relevant. We therefore can reverse only if the district court’s order was otherwise an abuse of discretion.
B.
Not all of the factors set out in Colorado River and Moses H. Cone are important in every case, and only some are important *1005 here. In this case, the forums are equally convenient, 8 there is no res, and the question of the order in which jurisdiction was actually obtained is confusing and largely academic. We have already determined that there are no substantial federal issues remaining in the case. We therefore focus on the factors that are important — the progress of the proceedings in each forum, the adequacy of the state courts to protect NOPSI’s rights, and avoiding piecemeal litigation.
The district court was correct that the state proceeding had progressed further than the federal one, since the state trial court had already rendered judgment on the merits of the sufficiency of the evidence claim. The Council’s argument that the state trial court’s judgment is entitled to res judicata effect is contrary to Louisiana law, see La.Civ.Code Art. 3556(31) (West 1990); but the fact that the state trial court has rendered judgment nonetheless weighs in favor of a stay. There is little to be gained from rehashing the same evidence in another forum.
The state courts are of course quite adequate to protect NOPSI’s rights. Indeed, they are more experienced in reviewing retail rate orders than are federal courts. This factor also weighs in favor of a stay.
Colorado River
was based primarily upon avoiding piecemeal litigation. Colorado had established a comprehensive system for adjudicating water rights, and it was plain that the relevant federal policies in the McCarran Act favored adjudicating water rights in a single, unified proceeding.
The district court’s discretion to stay decision pursuant to
Colorado River
is perhaps not as broad as was once thought. Compare
Will v. Calvert Fire Insurance Co.,
IV.
Finding no merit in NOPSI’s facial preemption challenge, and that the district *1006 court properly stayed the pretext challenge, we affirm the judgment of the district court.
AFFIRMED.
Notes
. Since this case began, Middle South Utilities has changed its name to Entergy Corporation. The parties refer to it by the old name in the briefs, and, for convenience, we do so as well.
. Middle South Energy is now known as Systems Energy Resources, Inc. Again, the parties refer to it by the old name in the briefs and we do so as well.
. FERC found that Grand Gulf 1 had been planned, constructed, and completed to meet the needs of the MSU System "as a whole.”
Mississippi Power and Light,
. The Court’s reasons for rejecting this argument were a bit murky. It stated that the reason FERC did not consider its jurisdiction was because the parties did not raise it, not because jurisdiction was lacking. Justice Scalia, concurring in the judgment, and Justice Brennan, dissenting, wrote separately to discuss the issue more thoroughly.
. NOPSI argues vigorously that the Council’s order essentially relitigates several matters FERC had already decided. Appellant’s brief at 43-48. We have already rejected this argument, relying on NOPSI III. See part II.B of this opinion. If the Council’s order did this, the Court in NOPSI III would not have been able to conclude that nothing in the order was directly or indirectly foreclosed by the FERC order. In any event, the opposite conclusion still would not compel us to hold FERC asserted jurisdiction to decide NOPSI’s prudence in not acting to minimize its losses. We would only be compelled to conclude that some of the issues that were relevant to FERC's wholesale rate proceeding were also relevant to the Council's proceeding. Of course, in that case, the Council would have been bound by FERC's resolution of those issues.
. Congress of course need not expressly grant FERC the power to preempt a particular state action. Rather, when state law is alleged to be preempted by federal regulation, the court must determine whether the agency action is preemptive (making the same inquiry as for a statute); the agency’s choice to act preemptively will be upheld whenever the action "represents a reasonable accommodation of ... policies that were committed to the agency’s care by the statute.”
City of New York v. F.C.C.,
. As we will explain, the district court premised its decision to stay in large part upon its conclusion that there were no substantial federal issues remaining in the case, once it had resolved the facial preemption challenge. The district court said that the disposition of the facial challenge "leaves only the question of whether the Council’s finding is supported by the evidence.” At 997. At oral argument, the parties and the panel proceeded on the assumption that the district court ignored the pretext claim. On further reflection and examination of the opinion, we cannot conclusively say that is so. It is equally plausible to read the district court’s language to mean that the court thought the pretext claim involved only an analysis of the sufficiency of the evidence, a conclusion with which we agree. We can only conclusively say that the district court did not expressly refute the argument that the pretext claim must involve an evaluation of the Council’s motivation in making the rate order.
P.T. Barnum once said of suckers: ‘There's one born every minute.’ This court, however, is not ready to assume there are many, if any, such suckers purchasing electricity in the wholesale market today. Indeed, this court is somewhat mystified by the Council’s logic in arriving at the $135 million disallowance in the Rate Order. In the Rate Order, the Council simply concluded that since [NOPSI’s President] said so, savings were actually possible. Then, the Council seemingly pulled from thin air a figure of 8% for the prudence disallowance. However, the Council, and in this case, everyone else knows that the 8% figure was not pulled from thin air but represents the difference between FERC’s 17% allocation and what NOPSI consistently claims as its relative share of the [Middle South] system [and what the Council advocated unsuccessfully in the FERC proceeding], i.e., 9%. Thus, the disallowed costs bear no apparent relationship to the savings NOPSI is said to have foregone, [sic] Must not the ‘savings’ posited as the reason for the disallowance be at least possible in the actual economic market? Furthermore, must not the ultimate disallowance bear some rational relationship to the possible savings which support the disallowance? These questions must be resolved on another day in another court.
. The district court noted that “[t]he factor of convenience usually refers to ease of access to sources of proof, availability of compulsory process, and enforceability of judgments,” and that in this sense, neither forum in this case was more convenient than the other. But the court still found the federal forum inconvenient because "it is certainly inconvenient for the parties to pursue two concurrent, parallel litigations in two courts within the same parish in Louisiana.” At 996. This approach unnecessarily confuses the analysis. The Court in
Colorado River
plainly considered convenience to mean roughly what it does in
jorum non conveniens
analysis, as its reference to
Gulf Oil Corp. v. Gilbert,
