This appeal concerns municipal regulation of the siting, construction, and operation of a natural gas compressor station. We weigh jurisdictional and jurisprudential concerns before addressing the merits, which implicate federalism and the interplay between state and local authority under Texas law. We affirm the judgment of the district court denying injunctive relief in part and granting relief in part.
I.
Plaintiff-Appellant Texas Midstream Gas Services LLC (“TMGS”) is in the business of installing and operating natural gas pipeline facilities. It is known as a “midstream gas gatherer.” Grand Prairie, Texаs (“Grand Prairie” or “the City”) is a home-rule city.
In 2007, TMGS announced plans to construct a natural gas pipeline and compressor station in Grand Prairie. Compressor stations are needed to clean and compress natural gas after extraction in anticipation of interstate transport. TMGS acquired land for the station and easements for the pipeline. Apparently concerned by the prospect of a compressor station within city limits, the Grand Prairie City Council amended the City’s Unified Development Code (“UDC”) on July 1, 2008, to cover natural gas compressor stations. Grand Prairie, Tex., UDC art. 4, § 10 (2008) (“Section 10”). Section 10 requires a Specific Use Permit (“SUP”) from the City to build and operate a natural gas compressor station (“the SUP requirement”). Id. art. 4, § 10.1. It requires, inter alia, that compressor stations comply with setback rules (“the setback requirement”); have an eight-foot security fence (“the security fence requirement”); enclose equipment and sound attenuation structures within a building; conform to certain aesthetic standards; and pave means of vehicular *204 access. Id. art. 4, §§ 10.2-.6. Section 10 also prohibits compressor stations from emitting noise in excess of pre-development ambient levels. Id. art. 4, § 10.5. Violations are punishable by civil penalties of up to $2,000 per day. Grand Prairie, Tex., UDC art. 21, § 11 (2008).
TMGS sued Grand Prairie and certain City officials for declaratory and injunctive relief. TMGS averred, inter alia, that Section 10 was preempted by the Pipeline Safety Act (“PSA”), 49 U.S.C. §§ 60101-60137, and that Section 10 impinged on TMGS’s state-conferred eminent domain powers. TMGS requested a temporary injunction against enforcement of Section 10 during the pendency of this case, and a permanent injunction upon its conclusion. 1 After considering undisputed evidence, the district court granted in part and denied in part injunctive relief. The court held that the PSA preempted part of the security fence requirement, but the remainder of Section 10 was lawful and severable. The court thus enjoined only the security fence requirement.
TMGS filed this interlocutory appeal. TMGS challenges the district court’s failure to enjoin the setback requirement because it infringes TMGS’s eminent domain rights and is preempted by the PSA. TMGS says the preempted parts are not severable from the remainder of Section 10, and therefore, Section 10 must be enjoined in toto.
After filing its notice of appeal, TMGS applied “under protest” for an SUP. Because the compressor station would be in an area zoned agricultural, a 300-foot setback applied. TMGS asked for a 250-foot setback from the south lot line. The City Council granted the exception and issued the SUP on July 7, 2009. The district court has stayed proceedings pending appeal.
II.
We first note that we have statutory jurisdiction over this appeal pursuant to 28 U.S.C. § 1292(a)(1), which confers jurisdiction in the courts of appeal over “[ijnterlocutory orders of the district courts ... granting, continuing, modifying, refusing or dissolving injunctions.” Grand Prairie does not argue that statutory jurisdiction is absent, but rather, says we lack Article III constitutional jurisdiction because the issuance of an SUP has rendered this appeal moot. Grand Prairie reasons that because the appeal seeks to enjoin Section 10’s setback requirement, for which an exception was granted, a ruling on the validity of this part of Section 10 would be an advisory opinion. TMGS counters that the station has not been built and that TMGS could change the station’s design and location. Moreover, TMGS still challenges Grand Prairie’s authority to enact Section 10, and seeks to enjoin the measure altogether.
A.
Mootness is a jurisdictional matter which can be raised for the first time on appeal.
See Harris v. City of Houston,
This appeal is not moot. TMGS has argued from the inception of this action that Grand Prairie lacks authority to regulate the compressor station’s siting, construction, or operation. TMGS still seeks declaratory and injunctive relief against enforcement of any part of Section 10. If TMGS had only sought to compel issuance of an SUP with a modified setback, it would arguably lack a “cognizable legal interest” in this appeal.
See id.; cf. Bayou Liberty Ass’n, Inc. v. U.S. Army Corps of Eng’rs,
Before argument, Grand Prairie filed a brief pursuant to Federal Rule of Appellаte Procedure 28(j) to alert us to a new Supreme Court opinion.
See Alvarez v. Smith,
— U.S. -,
B.
We address one more procedural wrinkle before weighing the merits. Perhaps convinced that its mootness argument was a winner, Grand Prairie did not brief the merits of this case. At argument, counsel offered no explanation for this omission. In some instances, this would lead us to conclude that a party had forfeited its opportunity to prevail on the merits.
See, e.g.,
Fed. R.App. P. 28(b) (requiring the appellee’s brief to contain,
inter alia,
argument for its contentions);
United States v. Whitfield,
In this case, it makes sense to proceed to the merits of the dispute. There is a substantial public interest in resolving matters implicating federalism and state law questions. The district court’s thorough and well-reasoned opinion also gives us a more than adequate basis for reviewing the merits of Grand Prairie’s position. Finally, there is little sense in declining to address the merits and remanding for further proceedings. TMGS sought declaratory and injunctive relief. The district court held that, aside from the security fence requirement, TMGS was unlikely to prevail on the merits. This holding, if affirmed, would foreclose most forms of relief TMGS could plausibly seek in the district court. Were we to decline to review the district court’s conclusions at this time, we could confront a near-identical appeal down the road. We will exercise our discretion to proceed to the merits of this appeal. However, we emphasize that counsel’s amateurish tactical decision to address only Grand Prairie’s mootness argument is an egregiоus lapse in counsel’s duty to brief all pertinent issues.
III.
We review the denial of injunctive relief for an abuse of discretion.
Nichols v. Alcatel USA, Inc.,
IV.
TMGS first argues that the setback requirement is void under Texas law. *207 TMGS says its eminent domain power “supersedes a setback requirement in a zoning ordinance, unless the objecting party— here, the City — can show that use of the eminent domain power is unreasonable or arbitrary.” The district court rejected this position as contrary to Texas law. We affirm.
A.
Texas law presumes that zoning ordinances are valid exercises of a city’s police powers.
City of Pharr v. Tippitt,
Several Texas cases explore the interplay between local zoning regulations and eminent domain powers. In the abstract, neither power is unbridled:
Eminent domain involves the deprivation of the right of the property owner to keep his property when it is needed for public use. Zoning regulations, derived from the police powers, deprive the property owner of the use of his property contrary to standards promulgated for the health, safety and welfare of the public generally. Both powers are inherent in state government and may be delegated for appropriate purposеs. Neither power is an unbridled one; in short, there must not be an abuse of the power.
Porter v. Sw. Pub. Serv. Co.,
The right of eminent domain advanced here is one derived from a general grant and does not exempt SPS from the zoning authority. The city, to which the state has specifically entrusted the police powers, has the power to inquire into the reasonableness of the manner by which eminent domain is to be exercised within its corporate limits. Its planning ordinances are presumed to be valid until the contrary is shown, and one seeking an exception has the burden of proof.
Id.
at 365. Similarly, in
Port Arthur Independent School District v. City of Groves (“Groves”),
While cities have discretion in exercising police powers, cities may not bar outright the reasonable exercise of eminent domain powers. In
Austin Independent School District v. City of Sunset Valley (“Sunset Valley"),
When both zoning and eminent domain authority is vested in a city, the city may make reasonable exceptions to zoning ordinances.
See City of Lubbock v. Austin (“Lubbock"),
B.
We reject TMGS’s argument that its eminent domain power trumps the setback requirement of Section 10. Even an eminent domain entity like TMGS must comply with generally applicable zoning requirements.
See Groves,
TMGS has not attempted to demonstrate that the setback requirement fails to promote public health, safety, or welfare. Instead, TMGS says under
Lubbock,
its “eminent domain power supersedes a setback requirement in a zoning ordinance.” It is true that
Lubbock
involved a setback which yielded to the exercise of
*209
eminent domain. However, in
Lubbock,
the fact that the city superseded its setback was not legally determinative. Both police power and eminent domain authority were vested by the state in one entity. It would strain logic to suggest that a city cannot make exceptions to its own zoning laws. The
Lubbock
court drew an analogy between the deference accorded a city when legislatively overriding its own ordinance, and the immunity of the state from local ordinances.
Under Texas law, a city may not unreasonably exercise its police powers to zone out eminent domain authorities altogether.
See Sunset Valley,
to carry on.”
Id.
at 476 (citing
Areola Sugar Mills Co. v. Houston Lighting & Power Co.,
TMGS has not shown that it is exempt from Grand Prairie’s zoning regulations or that the setback requirement is unreasonable or arbitrary. TMGS must therefore comply with the regulations, notwithstanding its eminent domain powers. TMGS has failed to show a likelihood of success on the merits, and therefore is not entitled to injunctive relief on this basis.
V.
TMGS next argues that the PSA preempts the setback requirement of Section 10. We hold that the setback requirement is consonant with federal law.
A.
Congress passed the PSA of 1994 to recodify, without substantive change, the Natural Gas Pipeline Safety Act of 1968 (“NGPSA”) and the Hazardous Liquids Pipeline Safety Act of 1979 (“HLPSA”). See Pub.L. No. 103-272, 108 Stat. 745, preamble. The PSA is intended to “pro *210 vide adequate protection against risks to life and property posed by pipeline transportation and pipeline facilities.” 49 U.S.C. § 60102(a)(1). With exceptions not relevant here, the PSA expressly preempts state “safety standards for interstate pipeline facilities or interstate pipeline transportation.” Id. § 60104(c). The PSA also directs the Secretary of Transportation to “prescribe minimum safety standards” for pipeline installation, operation, and maintenance. Id. § 60102(a)(2); see 49 C.F.R. §§ 192.1-193.2917,195.0-195.589. It is undisputed that the regulations cover TMGS’s compressor station. Pertinent to this appeal is 49 C.F.R. § 192.163(a), which reads in part:
[E]ach main compressor building of a compressor station must be located on property under the control of the operator. It must be far enough away from adjacent property, not under the control of the operator, to minimize the possibility of fire being communicated to the compressor building from structures on adjacent property. There must be enough open space around the main compressor building to allow the free movement of fire-fighting equipment.
TMGS says the setback requirement conflicts with this regulation.
Congress may preempt state law in three ways. It may do so by clearly and expressly articulating its desire to preempt an area.
Empacadora de Carnes de Fresnnilo, S.A. de C.V. v. Curry,
B.
The PSA expressly preempts “safety standards” for the facilities at issue.
See
49 U.S.C.A. § 60104(c). Congress has expressly identified the preempted area, so we will not ask if others are implicitly covered.
See Cipollone,
The question is whether the setback requirement is a “safety standard.” It is not. Along with the other provisions of Section 10, the setback requirement primarily ensures that bulky, unsightly, noisy compressor stations do not mar neighborhood aesthetics. City Council records reveal that Grand Prairie’s primary motivation in adopting Section 10 was to preserve neighborhood visuаl cohesion, avoiding eyesores or diminished property values.
See English,
TMGS counters this inference by asserting that the regulations “address the location of compressor stations.” However, the PSA itself only preempts
safety
standards. Section 192.163, an administrative regulation, touches on compressor station location as a means of effectuating this legislative directive. A regulation promulgated by an administrative agency cannot expand the unambiguously expressed preemptive scope set by Congress.
See Cipollone,
Our decision today is the first to consider whether the PSA preempts a setback requirement for a compressor station. However, our decision is consistent with PSA preemption jurisprudence from our court and elsewhere. Cases decided under the PSA’s predecessor statutes have uniformly invalidated parochial safety provisions.
See ANR Pipeline Co. v. Iowa State Commerce Comm’n,
Because the setback provision of Section 10 is not preempted, TMGS has not shown it is likely to prevail on the merits. The district court did not abuse its discretion in failing to enjoin the setback requirement.
VI.
Lastly, TMGS argues that the preempted security fence requirement is not severable from the remainder of Section 10. 4 Consequently, we must strike all of Section 10. TMGS is mistaken.
Severability is matter of state law.
Tex. Pharmacy Ass’n v. Prudential Ins. Co. of Am.,
VII.
TMGS has failed to show that Grand Prairie’s setback requirement is contrary to state or federal law. Because Grand Prairie has failed to show a likelihood of success on the merits, the district court properly denied injunctive relief with regard to this requirement. The judgment is AFFIRMED, and the case REMANDED for further proceedings as necessary.
Notes
. TMGS also sought via a separate state-court lawsuit to compel City officials to issue the permits necessary to preparing thе station site for construction.
. "A gas or electric corporation has the right and power to enter on, condemn, and appropriate the land, right-of-way, easement, or other property to any person or corporation." Tex. Util.Code Ann. § 181.004 (Vernon 2010). It is undisputed that TMGS is a gas corporation with eminent domain power.
. The eminent domain entity (the railroad) won in both
Ammons
and
White.
However, "neither case expressed the opinion that as an abstract principle the right of eminent domain is superior to the police powers represented by zoning regulations."
Porter,
. Grand Prairie has not appealed the district court's determination that part of the security fence requirement is preempted.
