Coors Brewing Co. v. City of Denver ( 2018 )


Menu:
  •                Opinions of the Colorado Supreme Court are available to the
    public and can be accessed through the Judicial Branch’s homepage at
    http://www.courts.state.co.us. Opinions are also posted on the
    Colorado Bar Association’s homepage at http://www.cobar.org.
    ADVANCE SHEET HEADNOTE
    June 25, 2018
    
    2018 CO 63
    No. 17SA55, Coors Brewing Co. v. City of Golden—Augmentation Plans—
    Amendment of Augmentation Plans—Return Flows.
    This case concerns Appellant’s application to amend its decreed augmentation
    plans to authorize the reuse and successive use of return flows from water that
    Appellant diverts out of priority pursuant to those plans. On competing motions for
    determinations of questions of law, the water court ruled that (1) any amount of water
    not beneficially used by Appellant for the uses specified in its decreed augmentation
    plans must be returned to the stream; (2) Appellant’s decreed augmentation plans did
    not authorize the reuse or successive use of such water; and (3) Appellant may not
    obtain the right to reuse or make successive use of such water by way of amendment to
    its augmentation plans but could only obtain such rights by adjudicating a new water
    right.
    The supreme court now affirms. Like the water court, the court concludes that in
    order to obtain the right to reuse and make successive use of the return flows at issue,
    Appellant must adjudicate a new water right and may not circumvent this requirement
    by amending its decreed augmentation plans. The court further concludes that the
    diversion of native, tributary water under an augmentation plan does not change its
    character. Accordingly, the general rule, which provides that return flows belong to the
    stream, applies. Finally, the court concludes that the water court correctly construed
    Appellant’s augmentation plans.
    The Supreme Court of the State of Colorado
    2 East 14th Avenue • Denver, Colorado 80203
    
    2018 CO 63
    Supreme Court Case No. 17SA55
    Appeal from the District Court
    Weld County District Court, Water Division 1, Case No. 15CW3179
    Honorable James F. Hartmann, Water Judge
    Concerning the Application for Amendment to Plans for Augmentation of Coors
    Brewing Company, in Jefferson, Adams, and Weld Counties.
    Applicant-Appellant:
    Coors Brewing Company,
    and
    Opposer-Appellant:
    City of Thornton,
    v.
    Opposers-Appellees:
    City of Golden, Centennial Water and Sanitation District, City and County of Denver,
    City of Arvada, City of Black Hawk, City of Northglenn, City of Westminster, Climax
    Molybdenum Company, Farmers High Line Canal and Reservoir Co., FRICO, Public
    Service Company of Colorado, State and Division Engineers, and Town of Georgetown.
    Judgment Affirmed
    en banc
    June 25, 2018
    Attorneys for Applicant-Appellant:
    Burns, Figa & Will, P.C.
    Stephen H. Leonhardt
    Courtney M. Shephard
    Morgan L. Figuers
    Greenwood Village, Colorado
    Naomi M. Baez Amos
    Denver, Colorado
    Attorneys for Opposer-Appellant:
    Hoskin Farina & Kampf, Professional Corporation
    William A. Hillhouse II
    John P. Justus
    Grand Junction, Colorado
    Attorneys for Opposer-Appellee City of Golden:
    Porzak Browning & Bushong LLP
    Glenn E. Porzak
    Steven J. Bushong
    Boulder, Colorado
    Attorneys for Opposer-Appellee City of Arvada:
    Lyons Gaddis Kahn Hall Jeffers Dworak & Grant PC
    Steven P. Jeffers
    Madoline Wallace-Gross
    Louisville, Colorado
    Attorneys for Opposer-Appellee City of Westminster:
    Carlson, Hammond & Paddock, LLC
    Lee H. Johnson
    Mason H. Brown
    Denver, Colorado
    Attorneys for Opposer-Appellee State and Division Engineers:
    Cynthia H. Coffman, Attorney General
    Paul L. Benington, First Assistant Attorney General
    Jeffrey N. Candrian, Assistant Attorney General
    Denver, Colorado
    Attorneys for Amicus Curiae Central Colorado Water Conservancy District:
    Lawrence Jones Custer Grasmick, LLP
    Bradley C. Grasmick
    Wesley S. Knoll
    Johnstown, Colorado
    2
    Attorneys for Amicus Curiae Consolidated Mutual Water Company:
    Collins Cockrel & Cole, P.C.
    Evan D. Ela
    Joseph W. Norris
    Denver, Colorado
    Attorneys for Amici Curiae Todd Creek Village Metropolitan District and Martin
    Marietta Materials, Inc.:
    Brownstein Hyatt Farber Schreck, LLP
    Wayne F. Forman
    Denver, Colorado
    No appearance by or on behalf of Centennial Water and Sanitation District, City and
    County of Denver, City of Black Hawk, City of Northglenn, Climax Molybdenum
    Company, Farmers High Line Canal and Reservoir Co., FRICO, Public Service
    Company of Colorado, or Town of Georgetown.
    JUSTICE GABRIEL delivered the Opinion of the Court.
    JUSTICE BOATRIGHT does not participate.
    3
    ¶1    This case concerns Coors Brewing Company’s application to amend its decreed
    augmentation plans to authorize the reuse and successive use of return flows from
    water that Coors diverts out of priority pursuant to those plans. The City of Golden
    opposed this application, arguing that Coors could not proceed by amendment but
    must adjudicate a new water right to reuse or make successive use of the return flows.
    On competing motions for determinations of questions of law, the water court ruled
    that (1) any amount of water not beneficially used by Coors for the uses specified in its
    decreed augmentation plans must be returned to the stream; (2) Coors’s decreed
    augmentation plans did not authorize the reuse or successive use of such water; and
    (3) Coors may not obtain the right to reuse or make successive use of such water by way
    of amendment to its augmentation plans but could only obtain such rights by
    adjudicating a new water right.
    ¶2    Coors appeals, arguing that the water court erred in (1) holding that Coors may
    not proceed by amendment but must adjudicate a new water right; (2) concluding that
    water unconsumed by Coors’s initial use must be returned to the stream and is subject
    to appropriation by other water users; and (3) interpreting Coors’s augmentation plan
    decrees to require permanent dedication of return flows to the stream.
    ¶3    We now affirm. Like the water court, we conclude that in order to obtain the
    right to reuse and make successive use of the return flows at issue, Coors must
    adjudicate a new water right and may not circumvent this requirement by amending its
    decreed augmentation plans.       We further conclude that the diversion of native,
    tributary water under an augmentation plan does not change its character.
    4
    Accordingly, the general rule, which provides that return flows belong to the stream,
    applies.   Finally, we conclude that the water court correctly construed Coors’s
    augmentation plans.
    I. Facts and Procedural History
    ¶4    Between 1977 and 2007, Coors sought and obtained three augmentation plan
    decrees. These decrees allowed Coors to divert water from Clear Creek out of priority
    for use within Coors’s Golden brewery and industrial complex, conditioned on Coors’s
    releasing enough replacement water to avoid injury to senior rights. Much of the water
    that Coors diverts pursuant to the decreed augmentation plans is consumed by Coors’s
    brewery operations.   Water not consumed by the brewery is run through Coors’s
    wastewater treatment plant and is then delivered to Clear Creek.
    ¶5    Beginning in the 1970s, Coors, with the approval and oversight of the State and
    Division Engineers, maintained a program to lease the water delivered to Clear Creek
    (the “return flows”) to other water users. Coors apparently operated this program with
    the understanding that once it fully replaced its out-of-priority diversions, it had no
    further obligation under its augmentation decrees because Clear Creek would have
    been made whole (i.e., Clear Creek would then have contained the same amount of
    water at the replacement water delivery point as it would have had without Coors’s
    diversions). Coors further understood that at this point, any “excess” water released
    from Coors’s wastewater treatment plant would have served only to overcompensate
    the stream, and Coors believed that it could reuse or lease such water to other users
    downstream.
    5
    ¶6    In 2014, however, the State Engineer chose not to approve a new lease of Coors’s
    return flows to Martin Marietta Materials, Inc., effectively terminating Coors’s
    long-time leasing practice.    Coors and Martin Marietta challenged the Engineer’s
    decision before the water court, arguing that the return flows at issue could be reused
    or successively used by Coors, as it had done for many years. The Engineer disagreed,
    arguing that Coors’s augmentation plans did not specify that Coors could reuse or
    successively use its return flows.        The parties then filed cross-motions for
    determinations of questions of law.
    ¶7     The water court ultimately agreed with the State Engineer. The court began by
    noting that Coors’s decreed augmentation plans allowed only a single use of the water
    diverted by Coors, and this use was limited to the purposes specified in the decrees.
    Because the plans did not authorize the reuse or successive use of such water, the court
    found that Coors was required to return unconsumed native water from Coors’s initial
    use back to the stream and could not lease the return flows absent a subsequent decree
    authorizing the reuse or successive use of that water.
    ¶8    In reaching this conclusion, the court rejected Coors’s contention that native
    water withdrawn from a stream that is fully replaced under an augmentation plan is
    like developed, foreign, or non-tributary water and thus could be fully consumed,
    reused, or successively used. The court observed that the fact that Coors diverts native,
    tributary water out of priority by adding replacement water to the stream under its
    decreed augmentation plans does not change the character of the water that is diverted
    from native water to something akin to foreign, developed, or non-tributary water. In
    6
    the court’s view, Coors therefore could not apply the water at issue to uses beyond
    those specified in its decrees, and the reuse or successive use that Coors sought was not
    so specified.
    ¶9     The court further rejected Coors’s argument that other users had no expectation
    of return flows from fully augmented diversions and therefore the one-use rule need
    not apply. The water court opined that this court had addressed and rejected a similar
    argument in Water Supply and Storage Co. v. Curtis, 
    733 P.2d 680
    (Colo. 1987). There,
    the applicant argued that an original appropriator should be recognized to have the
    right to reuse and make successive uses of water if the further use of the water was
    initiated immediately after the first beneficial use so that other users had no
    expectations regarding, and did not come to rely on, the return flows. 
    Id. at 682–83.
    This court disagreed, observing first that once the beneficial use on which a water right
    is based has taken place, any unconsumed waters remain waters of the state and were
    subject to appropriation. 
    Id. at 683.
    We then noted that the proper inquiry was whether
    the applicant had established by appropriation a right in the return flows. 
    Id. On the
    facts there before us, we concluded that the applicant had not done so. 
    Id. ¶10 The
    water court in the present case determined that the same principles apply
    here. Coors’s augmentation plan decrees provide that after Coors’s initial use, any
    unconsumed water must be returned to the stream. The decrees do not authorize reuse
    or successive use. Thus, as in Water Supply, the unconsumed water remains waters of
    the state.
    7
    ¶11      Upon receiving the water court’s ruling, Coors filed a motion for leave to amend
    its existing augmentation plan decrees to allow the reuse or successive use of the return
    flows at issue. Golden moved to dismiss Coors’s application, and the parties filed
    cross-motions for determinations of questions of law. The water court ultimately sided
    with Golden, concluding, “Coors may not obtain the right to reuse return flows through
    an amendment to its decreed augmentation plans, but instead may only obtain the right
    to reuse return flows by adjudicating a new water right.”
    ¶12      In reaching this conclusion, the court reiterated the fundamental rule that water
    native to the stream system is limited to one use and that any return flows belong to the
    stream, subject to appropriation and administration. In the court’s view, any reuse of
    return flows without a decree authorizing such use would amount to an unlawful
    enlargement of an appropriation by Coors. The court thus determined that to reuse
    return flows from a decreed use of native water, an appropriator must establish all of
    the elements of an independent appropriation and obtain a decree as a separate water
    right.
    ¶13      Turning to the facts before it, the court found that none of Coors’s decreed
    augmentation plans authorize the reuse or successive use of return flows.          To the
    contrary, each decree provides that any amount of water not consumed during Coors’s
    initial use of the water must be returned to the stream. Because Coors had neither
    claimed nor proved when it originally litigated its augmentation plan decrees that it
    would place return flows to beneficial use, the court concluded that Coors could not
    proceed by way of an amendment to its augmentation plan. To allow Coors to do so,
    8
    the court observed, would result in return flows that had historically accumulated and
    belonged to the stream being “precipitously” removed from the priority system.
    ¶14      After receiving this order from the water court, Coors advised the court that it
    would not seek a new appropriation but rather would pursue its effort to amend its
    augmentation decrees. The court then certified its order as final pursuant to C.R.C.P.
    54(b), and Coors now appeals.
    II. Analysis
    ¶15      Coors raises three issues in this appeal. First, it contends that the water court
    erred in concluding that Coors may not obtain rights of reuse or successive use by
    amending its augmentation plan decrees but rather must adjudicate a new water right.
    Second, it argues that the water court erred in concluding that the return flows at issue
    are subject to appropriation by other water users. In Coors’s view, the return flows at
    issue are akin to foreign or developed water and thus Coors has an implied right of
    reuse.     Finally, Coors argues that the water court erred in interpreting Coors’s
    augmentation plan decrees to require permanent dedication of return flows to the
    stream, regardless of whether such return flows are needed to replace Coors’s fully
    augmented depletions.
    ¶16      After briefly summarizing the pertinent principles of water law at issue, we
    address and reject each of Coors’s arguments in turn.
    A. Prior Appropriation and Augmentation Plans
    ¶17      The prior appropriation doctrine is embedded in the Colorado Constitution and
    forms the foundation of Colorado water law. City of Boulder v. Boulder & Weld Cty.
    9
    Ditch Co., 
    2016 CO 17
    , ¶ 26, 
    367 P.3d 1179
    , 1186.          In accordance with the prior
    appropriation doctrine, Colorado water law reflects a property rights-based allocation
    and administration system that promotes multiple use of a finite resource for beneficial
    purposes. 
    Id. Under this
    system, “[t]he first user to place previously unappropriated
    water to beneficial use enjoy[s] a vested water right in the beneficial use of that water,
    thus giving that senior appropriator priority in use over all subsequent (and therefore
    junior) appropriators.” Gallegos v. Colo. Ground Water Comm’n, 
    147 P.3d 20
    , 27 (Colo.
    2006).    In this system, water rights are created by appropriation, confirmed and
    assigned priority dates through adjudication, and enforced according to those priority
    dates through administration. City of Boulder, ¶ 
    26, 367 P.3d at 1186
    .
    ¶18      Notably, a water right is a usufructuary right that gives its holder “the right to
    use and enjoy the property of another without impairing its substance.” Navajo Dev.
    Co. v. Sanderson, 
    655 P.2d 1374
    , 1377 (Colo. 1982). Thus, one does not “own” water,
    but rather he or she owns the right to use water within the limitations of the prior
    appropriation doctrine. Kobobel v. Colo. Dep’t of Nat. Res., 
    249 P.3d 1127
    , 1134 (Colo.
    2011).
    ¶19      Given the demand for water and its scarcity as a resource, the adequacy of the
    supply of water to satisfy all claims can never be guaranteed. See 
    id. at 1134–35.
    Indeed, as a result of increasing demand, by the 1960s, many of Colorado’s river
    systems were reaching overappropriated status. See City of Boulder, ¶ 
    27, 367 P.3d at 1186
    .     In response to this issue, new water uses developed, and the legislature
    ultimately saw value in facilitating such uses, while at the same time protecting vested
    10
    water rights. 
    Id. at ¶
    28, 367 P.3d at 1186
    . Accordingly, as pertinent here, the legislature
    created several mechanisms “designed to facilitate new uses of overappropriated water
    resources.” 
    Id. A plan
    for augmentation is one of these statutory mechanisms, 
    id. at ¶
    29, 367 P.3d at 1186
    , and in creating this mechanism, “[t]he General Assembly chose
    to implement a policy of maximum flexibility that also protected the constitutional
    doctrine of prior appropriation,” Empire Lodge Homeowners’ Ass’n v. Moyer, 
    39 P.3d 1139
    , 1150 (Colo. 2001).
    ¶20    A plan for augmentation is
    a detailed program, which may be either temporary or perpetual in
    duration, to increase the supply of water available for beneficial use in a
    division or portion thereof by the development of new or alternate means
    or points of diversion, by a pooling of water resources, by water exchange
    projects, by providing substitute supplies of water, by the development of
    new sources of water, or by any other appropriate means.
    § 37-92-103(9), C.R.S. (2017).
    ¶21    When decreed by the water court, an augmentation plan allows a junior
    appropriator to divert out of priority if adequate replacement water is supplied so as to
    prevent injury to senior rights. See Simpson v. Bijou Irrigation Co., 
    69 P.3d 50
    , 60–61
    (Colo. 2003). To satisfy this condition, “[j]unior appropriators typically provide an
    augmented water supply to offset their out-of-priority depletions so that holders of
    decreed water rights can enjoy the quantity of supply that would be available to them
    absent those depletions.” City of Thornton v. City & Cty. of Denver ex rel. Bd. of Water
    Comm’rs, 
    44 P.3d 1019
    , 1025 (Colo. 2002).
    11
    ¶22     An applicant for an augmentation plan must receive judicial approval for that
    plan.      San Antonio, Los Pinos & Conejos River Acequia Pres. Ass’n v. Special
    Improvement Dist. No. 1, 
    270 P.3d 927
    , 937 (Colo. 2011); see also § 37-92-302(1)(a),
    C.R.S. (2017) (requiring a person who desires approval of a plan for augmentation to file
    with the water clerk a verified application setting forth the facts supporting the ruling
    sought).
    ¶23     The standards for judicial approval of augmentation plans appear in subsections
    37-92-305(3), (5), and (8), C.R.S. (2017).      We have summarized these standards as
    follows:
    Subsection (3)(a) states that a plan for augmentation “shall be approved if
    such . . . plan will not injuriously affect the owner of or persons entitled to
    use water under a vested water right or a decreed conditional water
    right.” Subsection (5) states, “In the case of plans for augmentation . . . ,
    the supplier may take an equivalent amount of water at his point of
    diversion or storage if such water is available without impairing the rights
    of others.” Subsection (8)(a) requires the water court, “in reviewing a
    proposed plan for augmentation and in considering terms and conditions
    that may be necessary to avoid injury,” to consider “the depletions from
    an applicant’s use or proposed use of water, in quantity and in time, the
    amount and timing of augmentation water that would be provided by the
    applicant, and the existence, if any, of injury” to any person entitled to use
    water under a vested water right or a decreed conditional water right.
    Subsection (8)(c) states “a plan for augmentation shall be sufficient [if] . . .
    the applicant . . . provide[s] replacement water” to the extent “the senior
    would be deprived of his or her lawful entitlement” of water. Subsection
    (8)(c) also requires the terms and conditions of the augmentation plan to
    require replacement of “out-of-priority depletions that occur after any
    ground water diversions cease.”
    Well Augmentation Subdist. of Cent. Colo. Water Conservancy Dist. v. City of Aurora,
    
    221 P.3d 399
    , 410 (Colo. 2009); see also Buffalo Park Dev. Co. v. Mountain Mut.
    Reservoir Co., 
    195 P.3d 674
    , 684 (Colo. 2008) (“The augmentation plan must identify the
    12
    diversion structures, the uses to be augmented, and the source and amount of legally
    available replacement water to replace the depletions.”).
    ¶24    Having thus described the nature of the rights at issue here, we proceed to
    address Coors’s contentions on appeal.
    B. Amendment of Coors’s Augmentation Plans
    ¶25    Coors principally contends that the water court erred in concluding that Coors
    may not amend its augmentation plan decrees to add rights of reuse or successive use
    but instead must seek a new appropriation.1 For several reasons, we are not persuaded
    by Coors’s argument.
    ¶26    First, as Golden observes, the only amendments to augmentation plans that the
    pertinent statute appears to contemplate are amendments to allow “additional or
    alternative sources of replacement water,” if the augmentation plan provides a
    procedure for seeking such changes. § 37-92-305(8)(c), C.R.S. (2017). Accordingly, it is
    not at all clear that the statute authorizes amendments of the type that Coors is
    pursuing in this case.
    1This court has had few opportunities to consider the standards applicable to amending
    an augmentation plan, although we have observed that the legislature has recognized
    “the complex nature of a plan for augmentation and the necessity of allowing the water
    court to adjust such a plan upon reconsideration.” Crystal Lakes Water & Sewer
    Ass’n v. Backlund, 
    908 P.2d 534
    , 542 (Colo. 1996). We need not attempt to delineate any
    applicable standards here, however, because we conclude that the procedure for
    amending an augmentation plan must, at a minimum, comply with the requirements of
    both subsections 37-92-305(3), (5), and (8) and our case precedents. As more fully
    discussed below, Coors has not established such compliance here.
    13
    ¶27   Second, a long line of case law from this court makes clear that “[i]n order to
    reuse or make successive use of return flows, all of the elements of an independent
    appropriation must be established and decreed as a separate water right.” Santa Fe
    Trail Ranches Prop. Owners Ass’n v. Simpson, 
    990 P.2d 46
    , 54 (Colo. 1999); accord City
    of Thornton v. Bijou Irrigation Co., 
    926 P.2d 1
    , 65 (Colo. 1996); Water Supply & Storage
    
    Co., 733 P.2d at 682
    –83.
    ¶28   Here, although certain decrees that Coors has adjudicated have allowed reuse
    and successive use, the decreed augmentation plans at issue have not. Thus, Coors has
    not yet adjudicated the rights of reuse and successive use that it seeks here, and settled
    case law requires such an adjudication.
    ¶29   In this regard, we are unpersuaded by Coors’s contention that it need not
    adjudicate a right to reuse or make successive use of the return flows at issue because it
    diverted the water under an augmentation plan. As the water court observed, diverting
    water out of priority from the public stream system and replacing water under a
    decreed augmentation plan does not allow a junior water user to circumvent the
    established rule that an appropriation is limited to the amount of water the
    appropriator puts to beneficial use, with the beneficial uses being those set forth in the
    decreed augmentation plans.      See Burlington Ditch Reservoir & Land Co. v. Metro
    Wastewater Reclamation Dist., 
    256 P.3d 645
    , 663 (Colo. 2011) (“Water native to the
    stream system is limited to one use in that system and return flows belong to the stream
    system as part of the public’s resource, subject to appropriation and administration.”);
    Water Supply & Storage 
    Co., 733 P.2d at 683
    (“[T]he proper inquiry is whether the
    14
    applicant has established a right in the return flow by appropriation, for that is the
    basis, if there is any, upon which its claim to that return flow must be founded.”).
    Coors cites no applicable authority to support its view that different principles apply to
    augmentation plan decrees than apply to other decreed water rights, and we have seen
    no such authority.
    ¶30   Third, what Coors construes as a “limited” amendment to its decreed
    augmentation plans would effectively add new uses to its decreed water rights while
    avoiding the procedural hurdles that normally accompany such changes. Specifically,
    Coors contends that the water court must approve the amendment allowing reuse and
    leasing after a showing of non-injury. As Golden noted at oral argument, however,
    such an abbreviated proceeding would seem to preclude a party opposing such an
    amendment from challenging the amendment under, among other things, the
    anti-speculation doctrine, which the party could indisputably do if Coors were to seek a
    new appropriation. See Front Range Res., LLC v. Colo. Ground Water Comm’n, 
    2018 CO 25
    , ¶ 27, 
    415 P.3d 807
    , 812 (noting that the anti-speculation doctrine applied to the
    replacement plan there at issue because that plan involved new appropriations or
    changes of water rights of designated groundwater).
    ¶31   Finally, we disagree that the State Engineer’s prior approval of Coors’s practice
    of leasing return flows has any bearing on our decision today. “Administrative action,
    forbearance of enforcement, or State Engineer acquiescence in water use practices does
    not substitute for judicial determination of use rights.”     Empire 
    Lodge, 39 P.3d at 1156
    –57. Whether or not the State Engineer’s decision in 2014 effected a change in
    15
    policy, Coors’s historical practice of leasing return flows does not justify a continuation
    or, indeed, expansion of that practice.
    ¶32    For these reasons, we agree with the water court that Coors must establish all of
    the elements of an independent appropriation to obtain the right to reuse or make
    successive use of return flows generated after its initial use of the water at issue.
    ¶33    In reaching this conclusion, we are unpersuaded by Coors’s contention that
    requiring it to establish the elements of an independent appropriation defeats the
    purpose of the statutory scheme. Although augmentation plans implement the General
    Assembly’s policy of “maximum flexibility” for water users, they do so by protecting,
    not subverting, the prior appropriation doctrine. See 
    id. at 1150.
    Here, each of Coors’s
    three augmentation plans appears to have sought and achieved the legislature’s
    intended flexibility by allowing Coors to divert water out of priority for use within its
    brewery and industrial complex, when Coors’s junior water rights might otherwise
    have been curtailed. We perceive nothing in the statutory scheme that contemplates,
    much less sanctions, a water user’s diverting water out of priority, overcompensating
    the stream for the depletions caused by its out-of-priority diversions, applying the
    diverted water to a beneficial use, and then seeking to lease any excess water to users
    downstream. To the contrary, such a practice conflicts with the fundamental principle
    that appropriators are limited to a single beneficial use and that return flows belong to
    the stream system as part of the public’s resources, subject to appropriation and
    administration. See Burlington 
    Ditch, 256 P.3d at 663
    .
    16
    C. Return Flows Subject to Appropriation
    ¶34    Coors next contends that the water court erred in concluding that its return flows
    are subject to appropriation by other water users. In Coors’s view, water that it diverts
    and fully replaces under its decreed augmentation plans is akin to foreign and
    developed water. This is so, Coors argues, because the act of delivering replacement
    water to compensate (and sometimes overcompensate) the stream for its depletions
    maintains or even increases the supply of water available for beneficial use in the
    stream. Thus, Coors suggests that it should have an implied right to reuse and make
    successive use of such water, which should not be available for appropriation by other
    users. We disagree.
    ¶35    Notwithstanding Coors’s suggestion to the contrary, water that Coors diverts
    from Clear Creek is native, tributary water, that is, “waters of the state.” § 37-92-103(12)
    (“‘Waters of the state’ means all surface and underground water in or tributary to all
    natural streams within the state of Colorado, except waters referred to in section
    37-90-103(6).”). Foreign and developed waters, in contrast, are not native, tributary
    waters. See City of Aurora ex rel. Util. Enter. v. Colo. State Eng’r, 
    105 P.3d 595
    , 603 n.3
    (Colo. 2005) (“Developed water is water that was not previously part of the river system
    and thus is not subject to administration by the state engineer.”); City of 
    Thornton, 926 P.2d at 66
    (defining “foreign water” as “water that is brought into a watershed or
    stream system from a source unconnected with the receiving system”).
    ¶36    A user that imports foreign or developed water into a stream system has
    imported new water from an unconnected source and for that reason is deemed to have
    17
    an inherent right of reuse or successive use.          See § 37-82-106(1), C.R.S. (2017)
    (“Whenever an appropriator has lawfully introduced foreign water into a stream
    system from an unconnected stream system, such appropriator may make a succession
    of uses of such water by exchange or otherwise . . . .”); cf. Williams v. Midway Ranches
    Prop. Owners Ass’n, 
    938 P.2d 515
    , 523 (Colo. 1997) (“In contrast to developed or
    imported water which is foreign to the tributary supply and typically can be utilized to
    extinction, an appropriation of tributary water cannot serve an enlarged duty, in the
    absence of noticed intent to appropriate for reuse or successive uses.”) (citation
    omitted).
    ¶37   In contrast, Coors, which diverts native, tributary water pursuant to a decreed
    augmentation plan, has not imported new water from an unconnected source into the
    stream system. And contrary to Coors’s suggestion, the mere act of diverting and fully
    replacing water under an augmentation plan does not effectively change the character
    of the diverted water as native, tributary water.       Accordingly, the diversion and
    replacement of water under an augmentation plan does not confer on Coors an
    automatic right of reuse. See City of 
    Thornton, 926 P.2d at 65
    (“Appropriators of water
    native to a public stream have no automatic right to capture and reuse this water after
    the initial application to beneficial use.”); Water Supply & Storage 
    Co., 733 P.2d at 683
    (noting that once the beneficial use on which a water right is based has taken place, any
    unconsumed waters remain waters of the state and are therefore subject to
    appropriation). Rather, like all native, tributary water, absent decreed rights of reuse or
    18
    successive use, the water that Coors diverts may be used once, and unconsumed water
    must be returned to the stream, where it is subject to appropriation by other users.
    ¶38    In reaching this conclusion, we are not persuaded by Coors’s contention that our
    conclusion undermines augmentation plans’ statutory purposes. Specifically, Coors
    contends that requiring it both to replace depletions under its augmentation plans and
    to relinquish the return flows at issue would deter the use of augmentation plans,
    destabilize the value of augmentation decrees, and undermine the maximum beneficial
    use of water. For two reasons, we disagree.
    ¶39    First, we note that Coors’s augmentation plan decrees allow Coors to reduce its
    replacement obligations by the amount of return flows generated and returned to Clear
    Creek at specified points. Thus, Coors need not overcompensate the stream, and it does
    not do so when it uses its return flows to offset depletions.
    ¶40    Second, the fact that Coors’s replacement of depletions and relinquishment of
    return flows may sometimes result in overcompensation and a net gain to the stream is
    simply part of the normal functioning of augmentation plans.             As this court has
    observed:
    [A]ugmentation plans are often fashioned, or operate by default, to supply
    more augmentation water to the stream than proves to be necessary.
    Supplying excess augmentation water to the stream under a decree
    certainly benefits other water users in order of their priorities, but there is
    no entitlement to continuation of such a gratuity.
    Wolfe v. Sedalia Water & Sanitation Dist., 
    2015 CO 8
    , ¶ 34, 
    343 P.3d 16
    , 28.
    ¶41    In sum, Coors need not overcompensate the stream, and the fact that it may
    sometimes do so does not undermine either the purpose of augmentation plans or the
    19
    maximum beneficial use of water. Rather, occasional overcompensation appears to be a
    by-product of the legislature’s policy of maximizing flexibility while, at the same time,
    protecting the prior appropriation doctrine by ensuring that out-of-priority diverters
    deliver at least enough replacement water to compensate the stream.          See Empire
    
    Lodge, 39 P.3d at 1150
    .
    D. Interpretation of Coors’s Augmentation Plans
    ¶42   Finally, Coors contends that the water court erred in concluding that Coors’s
    decrees require it to dedicate return flows to the stream, regardless of whether such
    return flows were needed to replace depletions caused by Coors’s out-of-priority
    diversions. Again, we are not persuaded.
    ¶43   Each of the three decrees at issue expressly provides that Coors will return all
    unconsumed water back to the stream. Specifically, two of the decrees provide, “[A]fter
    use, the portion of the water not consumed within [Coors’s] industrial complex is
    measured . . . and returned to the Clear Creek-South Platte stream systems at various of
    [specified] locations.” The third decree likewise provides, “[A]fter use, the portion of
    the water not consumed is measured . . . and returned to the Clear Creek-South Platte
    stream systems at various of [specified] locations.” Although Coors appears to assert
    that these provisions serve only to indicate where it may release return flows, in our
    view, such an interpretation reads out of the decrees the express requirement that
    unconsumed water be returned to the stream system. Accordingly, the water court’s
    findings are supported by the plain language of the decreed augmentation plans.
    20
    ¶44   Moreover, as noted above, in concluding that return flows from Coors’s initial
    use of water belong to the stream, the water court relied on “the established legal
    principle that native water is limited to a single use and all unused water must be
    returned to the stream, where it then becomes available for appropriation by other
    water users.” (Emphasis added.) Thus, the water court’s conclusion is also supported
    by long-settled law.
    ¶45   We therefore conclude that the water court did not err in its construction of
    Coors’s augmentation plans.
    III. Conclusion
    ¶46   For these reasons, we conclude that (1) in order to obtain the right to reuse or
    make successive use of the return flows at issue, Coors must adjudicate a new water
    right and may not proceed by way of an amendment to its decreed augmentation plans;
    (2) water unconsumed by Coors’s initial use must be returned to the stream and is
    subject to appropriation by other water users; and (3) the water court correctly
    interpreted Coors’s decreed augmentation plans. Accordingly, we affirm the water
    court’s judgment and remand this case for further proceedings consistent with this
    opinion.
    21