The State of Texas appeals a denial of its motion to intervene filed pursuant to Fed. R. Civ. P. 24. Concluding that the district court erred, we reverse and direct the district court to grant the state’s motion for intervention as of right.
In June 1996, the Sierra Club filed the instant action under the Endangered Species Act, 16 U.S.C. §§ 1531 et seq., alleging that certain individuals and entities that currently pump or otherwise withdraw water from the Edwards Aquifer were causing harm to and “taking” threatened and endangered species living at Comal and San Marcos Springs. According to the Sierra Club, for several years the annual recharge of the aquifer has trailed its annual discharge, causing the water level of the aquifer to fall and thereby reducing the flow of water to the Comal and San Marcos Springs, into which the aquifer discharges. The springs provide a home to four “endangered species” — the fountain darter, the San Marcos gambusia, the Texas blind salamander, and Texas wild-rice — and one “threatened” species — the San Marcos salamander — each of which, the Sierra Club contends, is jeopardized by the disruptions to the fragile ecosystem allegedly caused by human mining.
Although the Texas Legislature enacted the Edwards Aquifer Act to create a regulatory scheme to manage withdrawаls from the aquifer and “to sustain the diverse economic and social interests dependent on the aquifer water,”
Barshop v. Medina County Underground Water Conservation Dist.,
The State of Texas sought intervention in various capacities: (1) qua the State of Texas; (2) on behalf of three of its agencies that regulate state water and wildlife rights (the Texas Natural Resources Conservation Commission (“TNRCC”), the Texas Parks and Wildlife Department (“TPWD”), and the Texas Department of Agriculture (“TDA”)); (3) on behalf of its citizens (parens patriae)-, and (4) on behalf of the Texas Department of Criminal Justice (“TDCJ”), ' an Edwards Aquifer pumper. The district court granted the state’s motion to intervene in its capacity as pumper (on behalf of the TDCJ) but denied it permission to intervene in its other capacities.
II.
Before reaching the merits of the intervention, we must determine whether we have jurisdiction to entertain the appeal. In general, a district court order is appealable under 28 U.S.C. § 1291 if it “ends the litigation on the merits and leaves nothing for the court to do but execute the judgment.”
Catlin v. United States,
We have recognized previously that an order denying intervention оf right under rule 24(a) is appealable as a collateral order.
See Edwards v. Houston,
In
Stringfellow,
the district court denied the petitioner’s motion to intervene as of right but grаnted its application for permissive intervention with the following conditions: (1) the petitioner could not assert any claims for relief that had not already been requested by one of the original partiеs; (2) it could not intervene in the State of California’s claim for recovery of clean-up costs; and (3) it could not file any motions or conduct its own discovery without first conferring with one of the original parties and obtaining its permission so to proceed.
See Stringfellow,
In the instant case, the State of Texas, as represented by its attorney general, sought to intervene in various different capacities but was allowed tо do so only in its capacity as pumper. Under Texas law, the Attorney General enjoys an exclusive right to represent state agencies; other attorneys who may be permitted to assist the Attorney General are subordinate to his authority.
See Hill v. Texas Water Quality Bd.,
The district court did not, as did the Stringfellow court, place limitations on a single party’s rights to participate in a legal proceeding, but rather denied completely the rights of various different parties to participate in the instant litigation. Under the court’s order, other than the TDCJ, none of the оther State constituencies will be able to attend depositions, participate in any court hearings, receive copies of court documents or discovery materials, or otherwise exercise participatory rights in the litigation. The denial of intervention is therefore a collateral order that is immediately appealable. See 6 James Wm. MooRE et al., Moore’s Federal Practice § 24.24[1], at 24-85 (3d ed.1997).
III.
To intervene as of right pursuant to Fed. R. Civ. P. 24(a)(2), the petitioner must meet the following requirements: (1) The intervention application must be timely; (2) the applicant must have an interest relating to the property that is the subject of the action; (3) the applicant must be so situated that the disposition may, as a practical matter, impair or impede his ability to protect that interest; and (4) the applicant’s interest must be inadequately represented by the existing parties.
See Glickman,
82 F;3d at 108. We review for abuse of discretion the finding of timeliness and the other requirements
de novo. See Sierra Club v. Espy,
Witti respect to the interests of the state (in its various capacities) in the subject matter of the litigation, we find that they are several and important: (1) The state
qua
state has an important sovereign interest in protecting the self-governing authority of the Edwards Aquifer Act and in seeing that the scheme passed by the legislature is properly enforced,
see Glickman,
We similarly reject the Sierra Club’s argument that the state’s various interests are represented adequately by the existing parties. It is axiomatic that the interests of the pumpers, who are local cities, businesses, and governmental entities that rely on the aquifer’s water supply for their immediate subsistence, will diverge from those of the various state agencies who are charged with taking a state-wide view of the aquifer as it affects wildlife, water resources and quality, and the agricultural industry, as well as those of the state
qua
state and as
parens patriae.
Plainly, the pumpers will not represent adequately the intеrests of these state constituencies and, under Texas law, may not do so.
See Hill,
Because we find that the state has met the requirements of rule 24(a)(2), we REVERSE the partial denial of intervention and REMAND with direction to the district court to grant the state’s motion for intervention as of right.
Notes
.
See, e.g.,
Tex. Water Code Ann. § 5.013 (Vernon 1995) (charging the TNRCC with regulating Texas surface water rights and quality); Tex Parks & Wild.Code Ann. § 12.0011 (Vernon 1995) (charging the TPWD with protecting the State's fish and wildlife resources); Tex Agric. Code Ann. § 12.002 (Vernon 1995) (charging the TDA with encouraging the proper development of agriculture, horticulture, and related industries);
Alfred L. Snapp & Son, Inc., v. Puerto Rico,
