Several natural gas producers petition for review of three orders of the Federal Energy Regulatory Commission denying their request, pursuant to §§ 4 and 5 of the Natural Gas Act, 15 U.S.C. §§ 717c, 717d(a), that Southern Natural Gas Co. be ordered to revise its tariff to include a safe harbor gas quality standard that specifies a hydrocarbon dewpoint at which Southern will guarantee the transportation of gas. Because the producers may yet secure that very relief in a proceeding now pending before the Commission, we dismiss the present petition as unripe.
I. Background
The producers operate upstream from three natural gas processing plants located near Toca, Louisiana and owned in part by affiliates of some of the producers. All the producers tender to Southern’s pipeline, at receipt points also upstream of the plants, gas with a relatively high liquefiable hydrocarbon content. A natural gas stream with a high content of liquefiable hydrocarbons, however, threatens the reliable operation of a pipeline. For that reason § 3.1(b) of Southern’s tariff provides that Southern will not accept gas containing more than 0.3 gallons per thousand cubic feet of isopentane and heavier hydrocarbons.
Ordinarily § 3.1(b) is of no consequence because it is in the producers’ economic interest to extract hydrocarbons at the processing plants for the purpose of selling them as liquid natural gas. Accordingly, Southern typically waives enforcement of the tariff provision at the producers’ receipt points, relying upon processing at the plants downstream to render the gas compliant.
In December 2000, however, the price of natural gas rose to a level at which the producers found it more profitable to leave the hydrocarbons in their gas than to extract and sell them because hydrocarbons raise the heat content, and hence the value, of the gas. The operators of the processing plants at Toca therefore informed Southern they would shut down the plants by the end of the month. Concerned about the effect upon the reliability of its pipeline, Southern notified all producers that:
In the event the processing capacity is reduced significantly ... Southern may commence enforcement of Section 3.1(b) .... Individual producers that do not meet the quality specification will be ... required to reduce or shut-in their production.
On January 5, 2001 the producers petitioned the Commission for a temporary restraining order to prevent Southern from refusing their gas and requested that an emergency technical conference be held. The Commission did not issue a temporary restraining order but it did convene the requested conference. Amoco Prod. Co., 94 F.E.R.C. ¶ 61,026 (2001). Neither the conference nor subsequent settlement discussions, however, resolved the producers’ concerns. In May 2003 the Commission directed the parties to identify outstanding issues and their positions thereon. Amoco Prod. Co., 103 F.E.R.C. ¶ 61,175 (2003).
The producers responded by filing a complaint before the Commission, asserting Southern’s threatened refusal to accept their gas was discriminatory within the *265 meaning of §§ 4 and 5 because, at receipt points downstream from the processing plants, it had accepted gas with a higher liquefiable hydrocarbon concentration than gas processed at the Toca plants. The producers claimed such discrimination arose because there was no safe harbor gas quality specification standard in Southern’s tariff, and asked that Southern’s tariff be revised accordingly. To that end they requested an evidentiary hearing.
The Commission dismissed the producers’ complaint as well as their earlier petition. Toca Producers v. S. Natural Gas Co., 104 F.E.R.C. ¶ 61,300 (2003). Section 4, explained the Commission, applies only to a tariff change initiated by a pipeline. Id. at 62,130. As for § 5, the Commission held the producers had not carried their “substantial burden” of showing Southern’s tariff was “unjust and unreasonable,” id., and because they had adduced “no genuine issues of material fact” on that score, the Commission declined to hold an evidentiary hearing, id. at 62,129-62,130. The Commission did, however, condition its dismissal of the producers’ complaint upon Southern’s making a § 4 filing to include in its tariff an “aggregation methodology, including [a] flexible [gas quality specification] standard.” Id. at 62,128, 62,-130.
Southern duly filed a proposal to revise its tariff, see S. Natural Gas Co., 105 F.E.R.C. ¶ 61,254 (2003) (Docket No. RP04-42-00), and that proceeding, in which the producers have intervened, is still pending. Meanwhile, the Commission denied both the producers’ petition for rehearing, see 106 F.E.R.C. ¶ 61,158 (2004), and their subsequent motion for clarification or rehearing, see 107 F.E.R.C. ¶ 61,-009 (2004), and the producers petitioned this court for review of all three of the Commission’s orders.
II. Analysis
Before addressing the merits of the producers’ petition we must be satisfied it meets the requirements of a “Case” or a “Controversy” within the meaning of Article III of the Constitution of the United States,
see Steel Co. v. Citizens for a Better Env’t,
*266
The interests of the court and of the agency in withholding judicial review ordinarily depend upon “the fitness of the issues for judicial decision,”
Abbott Labs.,
The Commission has yet to pass conclusively upon whether the producers are entitled to the only relief they now seek, namely, that Southern’s tariff be revised to include an objective gas quality specification standard. As the Commission portrays the situation in its brief — and the producers do not disagree — “[t]he proceeding in FERC Docket No. RP04-02 could result in a tariff modification that [the producers] seek, thus resolving the issues raised in this appeal.” There is therefore a substantial “judicial interest in deferring resolution” of the petition because, if the producers’ entitlement to such a standard is not presently adjudicated, then it “may not require adjudication at all.”
Friends of Keeseville,
The institutional interest in deferring a judicial resolution must, of course, be weighed against “the hardship to the parties of withholding court consideration” at this time.
Abbott Labs.,
The producers belatedly (that is, in their reply brief) claim “[t]here is a significant risk that FERC will rely on its findings in the [orders under review] to deny [the producers’] arguments in the [pending] case or other future cases.” We do not ordinarily notice an argument first raised in a reply brief because the other side had no opportunity to respond in its brief,
see Amgen, Inc. v. Smith,
In sum, because the public interest in judicial economy counsels against our now considering the producers’ petition, and because the producers have pointed to no hardship from waiting until the administrative process has run its course, we hold their petition is not ripe for review.
III. Conclusion
For the foregoing reasons, the producers’ petition for review is
Dismissed.
Notes
We note the "[r]ipeness doctrine is responsive to constitutional as well as prudential considerations,”
Action Alliance of Senior Citizens of Greater Phila. v. Heckler,
