Opinion for the Court filed by Circuit Judge STARR.
Northwest Pipeline Corporation seeks review of ten Federal Energy Regulatory Commission orders, five of which imposed a rate condition on Northwest’s certificates of public convenience for the transportation of natural gas, and five of which denied petitions for rehearing on these certificates. For the reasons stated below, we deny the petitions for review.
I
This case arises out of a multi-pronged rate system crafted by Northwest. Our story begins on the last day in May, 1985. On that day, the Commission approved a
*75
settlement of Northwest’s general rate proceedings.
Northwest Pipeline Corp.,
Northwest decried the Commission’s action, suggesting that its intermingling of rates had created an unwanted (an unlawful) mutant. As Northwest saw it, a deal was a deal, and yet the Commission was seeking to unscramble the eggs (of the May 31, 1985 settlement omelet) by imperiously requiring Northwest to charge a different rate (T-6) than those agreed to by the customers (T-2, T-4 and T-5). To make matters worse, Northwest complained, “[t]he condition was imposed without any hearings or record evidence relating to Rate Schedule T-6 and without any claim that the T-2, T-4 and T-5 transportation rates approved in [the settlement proceedings] were no longer just and reasonable.” Brief for Petitioner at 7. The real (and obvious) fly in the ointment was that T-6 was lower than the T-5 rate (although, in fairness, it was higher than either the T-2 or T-4 rate). Id. As Northwest viewed the situation, the Commission had unilaterally imposed this rate in violation of the structural protections afforded by sections 4 and 5(a) of the Natural Gas Act, 15 U.S.C. §§ 717c(c), 717d(a). To make bad matters worse, Northwest complained, FERC had acted in high-handed fashion without pausing to consider the effect of the unwanted rate condition on Northwest’s take-or-pay costs. Here is the way Northwest puts it:
The Commission’s willful disregard of this “particularly vexing problem in the natural gas industry with which [this Court has] expressed ... concern,” is especially egregious because the Commission-approved T-5 Settlement rate included a component providing for the recovery of increased revenues to reimburse Northwest for a reasonable portion of take-or-pay costs resulting from sales replacement transportation.
Brief for Petitioner at 11 (internal citation omitted).
But this only sets the stage for what was then to come. With the battle lines thus drawn between Northwest and the Commission, the section 7(c) certificates threw off their mortal coils in June 1988. It was then that Northwest accepted a blanket certificate under FERC’s seminal Order No. 436.
See Associated Gas Distributors v. FERC,
II
A
The doctrine of mootness is founded on the “case or controversy” requirement of Article III, § 2 of the Constitution.
See, e.g., Honig v. Doe,
— U.S. -,
Here, Northwest seeks elimination of the T-6 rate condition in each of five challenged certificates. In addition to the rate condition, however, these certificates contained a condition limiting their duration to the earlier of one year “or the date on which Northwest accepts a blanket certificate under Order No. 436.”
See, e.g.,
39 FERC ¶¶ 61,092, 61,247-88 (1978).
3
In June 1988, Northwest voluntarily accepted this blanket transportation certificate, thereby terminating the earlier § 7(c) certificates. Obviously, the challenged rate terms disappeared into the regulatory netherworld when the certificates themselves entered the archives.
4
Since Northwest
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now operates under the Order 436 blanket certificate, it is abundantly evident that no prospective relief is available with respect to the now-rescinded § 7(c) certificates. Thus, to the extent it seeks elimination of the T-6 rate in these certificates, Northwest’s claim is, beyond reasonable dispute, moot.
Cf. New Jersey Zinc Co. v. FERC,
Northwest attempts to skirt this rather formidable impediment by arguing that imposition of the T-6 rate condition constitutes unlawful agency action which fits within the familiar exception of “capable of repetition, yet evading review.”
See Southern Pacific Terminal Co. v. Interstate Commerce Commission,
B.
In May 1987, Northwest officially accepted certificates containing the disputed T-6 rate for three of its customers and then began providing service thereunder. 6 Joint Appendix (J.A.) at 88-92. Northwest now seeks to recoup the difference between the lower T-6 rate that it charged these three shippers and the higher T-5 rate that it believes it was entitled to charge. As discussed above, this claim would obviously survive the termination of the § 7(c) certificates and (potentially) present a live controversy.
However, a major stumbling block stands in Northwest’s way: its failure to comply with the well-understood statutory prerequisite to securing judicial review. Section 19(b) of the Natural Gas Act provides that “[n]o objection to the order of the Commission shall be considered by the [reviewing] court unless such objection shall have been urged before the Commission in the application for rehearing unless there is reasonable ground for failure to do so.” 15 U.S.C. § 717r(b) (1982). The obvious (and salutary) purpose of the § 19(b)
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exhaustion requirement is to afford the Commission an opportunity to bring its knowledge and expertise to bear on an issue before it is presented to a generalist court.
See Federal Power Commission v. Colorado Interstate Gas Co.,
Here, as we read this record, Northwest simply did not present the Commission with a claim for retroactive relief. The pivotal language is found in the June 1987 petition for rehearing, in which Northwest requested “elimination of the conditions requiring use of Northwest’s T-6 rate, and approval of use of Northwest’s T-2 through T-5 rates as applicable.” J.A. at 35. Although Northwest emphatically asserts that this statement sufficiently raised the retroactive recovery issue for the Commission’s consideration, we think not.
7
Obliged, as we are, to apply section 19(b) “punctiliously,”
see New Jersey Zinc,
Ill
The Commission, joined by intervenors, contends that if we determine the case is moot, as we have, we should dismiss Northwest’s petition for review without disturbing the agency’s orders. The Commission and intervenor James River II, Inc. argue that vacating the orders will have a prejudicial effect on James River’s pending antitrust action against Northwest in U.S. District Court in Oregon. See James River II, Inc. v. Northwest Pipeline Corporation, Civil No. 87-1141 (D.Ore.). In addition, intervenors Cascade and Oregon Steel, see supra nn. 1-2, contend that vacatur would wipe out a priority scheme for Northwest’s interruptible customers embodied in the challenged orders. Northwest, in contrast, asserts that its efforts to defend James River’s lawsuit will be prejudiced if the orders are left intact.
In this setting, we are guided by the familiar principles enunciated in
United States v. Munsingwear,
Munsingwear
vacatur was extended to the administrative context in
Mechling Barge Lines v. United States,
For the foregoing reasons, we hold that Northwest’s challenge is moot. To the extent the challenge is premised on Northwest’s desire for retroactive relief, that claim is barred by virtue of Northwest’s failure specifically to request such relief. Finally, for the reasons stated, we vacate the orders under review in compliance with Munsingwear’s strictures.
JUDGMENT ACCORDINGLY.
Notes
. James River II, Inc. has intervened on behalf of FERC, arguing that Northwest’s acceptance of the Order 436 blanket certificate mooted their challenge under the section 7(c) certificates. In addition, James River contends that Northwest cannot raise a claim for retroactive relief before this court because it (Northwest) failed to exhaust its administrative remedies before FERC. Similar arguments in support of *76 FERC’s position are advanced by intervenor Oregon Steel Mills, Inc.
. Cascade Natural Gas Corporation has provided nominal, yet substantively dubious, support for Northwest in its intervening papers. Cascade argues that the case should not be found moot if we conclude that Northwest properly preserved its claim for retroactive relief. However, Cascade then goes on to argue that no retroactive relief should be available to Northwest because, among other things, Northwest failed to exhaust its administrative remedies.
. The Order 436 "blanket certificate” authorizes Northwest to offer nondiscriminatory transportation services on a self-implementing basis, based on rates set forth in a schedule approved by FERC in July 1988. Order No. 436, 50 Fed. Reg. 42,408 (1985). This court "up[held] the substance of Order No. 436” in
Associated Gas Distributors v. FERC,
.In its statement accepting the new blanket certificate, Northwest acknowledged that rate schedules T-2 through T-7 were thereupon "revoked, terminated, cancelled, and abandoned.” See Northwest Pipeline Corporation, Docket Nos. 86-578-00, 86-578-014, “Compliance Filing” of June 10, 1988 at 3-4.
. This exception is warranted, Northwest claims, because the combination of the rate and duration conditions in its § 7(c) certificates and a FERC order that it either transport gas for all its T-6 shippers at the T-6 rate under a blanket certificate or, alternatively, pursuant to the T-6 conditioned § 7(c) certificates, see James River Corp. of Nevada v. Northwest Pipeline Corporation, 42 F.E.R.C. ¶ 61,344 (March 22, 1988), reh'g denied, 44 F.E.R.C. ¶ 61,030 (1988), created excessive economic pressure to accept the Order 436 blanket certificate.
. Intervenor Cascade, one of the three shippers receiving transportation from Northwest at the T-6 rate, states that services were initiated to it on May 3, 1987. Brief of Intervenor Cascade Natural Gas Corporation at 4.
. At oral argument, counsel for Northwest asserted that, in his years of practice, he had never known the Commission to require a specific request for retroactive relief in order for it to consider the issue, nor had he ever seen such a request. While we have respectfully considered these representations, we are, upon reflection, convinced — for reasons set out more fully in the text below — that § 19(b) requires a clear and specific request for the extraordinary remedy of retroactive relief.
. We are not unmindful of Northwest’s claim that it would be unreasonable to require it to have raised the issue of retroactive relief before FERC on June 1, 1987, since it had not — by that point — even submitted any bills to its three T-6 customers. However, as of June 1, 1987, Northwest had already provided four weeks of service to at least one of its customers, intervenor Cascade Natural Gas Corporation. See supra note 6. Furthermore, a reasonable estimate of the time it would take for FERC to consider Northwest’s petition for rehearing should have put Northwest on notice that it could expect at least several weeks of service at the T-6 rate. In fact, the Commission’s eventual denial of Northwest’s petition was issued on July 23, 1987. In light of these circumstances, it was unreasonable for Northwest not to have anticipated its desire for retroactive application of alternative rates. Thus, the claim for such relief should have been included in Northwest’s petition before FERC.
. An exception from the Munsingwear doctrine has emerged when the losing party in the trial court (or agency) attempts to avoid the prece-dential effect of the lower court’s ruling by deliberately acting to moot the case on appeal. See Center For Science in the Public Interest v. Regan, 727 F.2d 1161, 1165 (D.C.Cir.1984); Ringsby Truck Lines v. Western Conference of Teamsters, 686 F.2d 720 (9th Cir.1982). Inter-venor James River II attempts to make use of this exception by arguing that Northwest is responsible for the case becoming moot. Brief of Intervenor James River II at 17-18. But, as FERC correctly notes, this line of cases is not apposite since Northwest is opposing a finding of mootness and seeks a resolution of the case on the merits.
