Dollxver, J.
In a direct appeal, the Yakima-Tieton Irrigation District (YTID) challenges several aspects of the trial court’s ruling on YTID’s water right. The Department of Ecology and numerous other parties have cross-appealed.
This direct appeal arises from a general adjudication of water rights in the Yakima River Basin that began in [750]*7501977. Other matters concerning the adjudication have been before this court two previous times. In the first appeal, this court allowed the general adjudication to proceed even though personal service of process had not been served on over 40,000 individual parties who used water from the basin. Instead, the court approved service on the 4,000-plus water distributing entities who serve the individual users. Department of Ecology v. Acquavella, 100 Wn.2d 651, 674 P.2d 160 (1983) (Acquavella I). The second appeal involved the quantity of water reserved by the federal government for the Yakima Indian Nation. Department of Ecology v. Yakima Reservation Irrigation Dist., 121 Wn.2d 257, 850 P.2d 1306 (1993) (Acquavella II). This third appeal involves the trial court’s water award to just one of many water claimants, the Yakima-Tieton Irrigation District.
Yakima River Basin History
The Reclamation Act, 43 U.S.C. § 371 (originally enacted as Act of June 17, 1902, ch. 1093, 32 Stat. 388), authorized the Secretary of the Interior to construct large federal irrigation projects to reclaim and render productive arid and semi-arid lands. The projects set up under the Reclamation Act were to be operated by the Bureau of Reclamation (BOR). In carrying out the provisions of the Act, the Secretary had to comply with applicable state laws. 43 U.S.C. § 383. Because of this requirement, the Secretary would not undertake any project in a state without the approval of that state’s legislature.
In 1905 the Washington State Legislature passed laws expressly allowing the United States to acquire lands and water rights in order to construct and operate reclamation projects. Laws op 1905, ch. 88, at 180 (codified in RCW 90.40 — any reference to acts done under the authority of these 1905 laws will cite the current codification of the laws). In that same year, pursuant to RCW 90.40.010 and RCW 90.40.030, the United States began to withdraw all unappropriated waters in the Yakima River Basin. This federal withdrawal was extended numerous times until [751]*7511951, at which point any remaining unappropriated waters reverted back to the state. Any water rights perfected during the period of federal withdrawal date back to the initial application in 1905. RCW 90.40.040.
The Yakima-Tieton Irrigation District was formed in 1918, and it is one of the several districts that receives its water from reservoirs constructed and maintained by the United States pursuant to the Reclamation Act. In 1939, the United States and two irrigation districts initiated a lawsuit to determine how to recover certain costs arising from the operation of the Yakima Project. The defendants cross-claimed for a general adjudication of water rights in the Yakima Basin, and in 1945, to avoid further litigation, the parties signed a Consent Decree which set out the United States’ obligations — in terms of quantity of water it had to deliver — to each of the parties involved. Kittitas Reclamation Dist. v. Sunnyside Valley Irrigation Dist., Civil Action No. 21 (E.D. Wash. S. Div. Jan. 31, 1945). The United States District Court for Eastern Washington has maintained jurisdiction over issues arising from the 1945 Consent Decree. See, e.g., Kittitas Reclamation Dist. v. Sunnyside Valley Irrigation Dist., 626 F.2d 95 (9th Cir. 1980), cert. denied, 449 U.S. 1079 (1981); Schinmann v. United States, 618 F. Supp. 1030 (E.D. Wash. 1985), aff’d mem., 811 F.2d 1508 (9th Cir.), cert. denied, 484 U.S. 924 (1987).
YTID was a party to the 1945 Consent Decree. Under the decree, YTID’s primary water right was listed as 96,000 acre feet (a.f.) for annual use during the irrigation season, and YTID was also assigned another 18,000 a.f., which was transferred from another irrigation district that did not need the water. The decree stated the BOR would sell the 18,000 a.f. to YTID. The decree placed no restrictions on the 18,000 a.f. awarded to YTID.
Pursuant to the 1945 Consent Decree, YTID amended its contract with the BOR. The contract mentioned that the amount of water delivered to YTID in prior years had been insufficient, and the contract also noted YTID’s desire [752]*752to have an additional water supply in low water years. The contract then granted the .18,000 a.f. to YTID, on the condition that delivery of the 18,000 a.f., in addition to YTID’s normal entitlement of 96,000 a.f., did not exceed the safe carrying capacity of YTID’s canals. The contract required YTID to pay the construction costs for storage works to hold the 18,000 a.f., and YTID also had to pay an annual maintenance fee for the use of the water. YTID has never been able to accept delivery of 114,000 a.f. (96,000 plus 18,000) because that quantity of water could not be delivered without exceeding the safe carrying capacity of YTID’s canals.
The United States ended its withdrawal of water under RCW 90.40.030 in 1951. Afterward, the BOR filed a surface water application with the Department of Ecology’s predecessor, the Department of Conservation and Development, Division of Water Resources, for the use of irrigation water in the Tieton District. The State agency determined YTID’s water use pre-dated the 1917 Water Code, such that a water permit was unnecessary to maintain YTID’s water usage.
In 1974, pursuant to RCW 90.14.041, the BOR filed a water rights claim for waters used by YTID. It is unknown if the Department of Ecology (DOE) ruled on the claim prior to the initiation of this adjudication in 1977.
The adjudication and YTID’s award
For a detailed history of the adjudication, see Ac-quavella I and II. Prior to ruling on any of the claimants’ water rights, the trial court divided the water claimants into four different categories. See Acquavella II, 121 Wn.2d at 262. YTID is classified as a major claimant with state-based water rights. In 1992 the trial court made several threshold rulings as to how the major claimants’ water rights were to be determined. Clerk’s Papers at 371-408; Clerk’s Papers at 409-12. DOE sought direct review of those threshold rulings, but this court denied review. Department of Ecology v. Ellensburg Water Co., No. 59630-1 (Jan. 15, 1993) (Commissioner’s Ruling Den. Mot. [753]*753For Discretionary Review). The trial court conducted further proceedings to hear evidence on YTID’s water claims, after which the court ruled on YTID’s entitlement. The ruling specifies the quantity of YTID’s water entitlement, and it also describes the land to which the water right is appurtenant.
In determining the quantity of water awarded to YTID, the trial court gave much deference to the amount specified in the 1945 Consent Decree. As mentioned above, the Consent Decree and YTID’s contract listed YTID’s water rights as 114,000 a.f. during the irrigation season, but only to the extent that YTID could accept delivery of the water without exceeding the safe carrying capacity of YT-ID’s canals. The trial court determined that YTID could, at most, carry 110,700 a.f. safely in its canals. The trial court then awarded YTID the 110,700 a.f. for the irrigation season. Two assignments of error have been raised pertaining to the quantification aspect of the trial court’s order.
Besides specifying the quantity of a claimant’s water entitlement, a water rights certificate resulting from a general adjudication must describe "the land to which said water right is appurtenant . . . .” RCW 90.03.240. In accordance with this requirement, the trial court entered a finding of fact and order describing YTID’s water right as being appurtenant to 27,900 irrigable acres. The trial court also stated that YTID’s "current irrigable acreage is subject to change based on future reclassification of the Bureau of Reclamation.” Clerk’s Papers at 764. Two assignments of error have been raised as to the classification of acreage.
ISSUES PRESENTED FOR REVIEW:
YTID assigns two errors to the trial court’s orders. First, YTID does not dispute the total quantity of water awarded, but YTID argues 18,000 a.f. of the amount awarded should have been classified specifically as standby/reserve water. If the water is classified as standby/reserve, according to [754]*754YTID’s argument, then the water will not be subject to relinquishment through nonuse of five years or more. See RCW 90.14.140(2)(b). This first assignment of error will be referred to as the Standby/Reserve Issue. YTID’s second error challenges the appropriateness of the statement, quoted in the previous paragraph, concerning the BOR’s reclassification of irrigable acres within YTID. This will be referred to as the Reclassification Issue.
DOE assigns two errors to the trial court’s order. First, DOE challenges the trial court’s reliance on the 1945 Consent Decree as evidence of YTID’s water right. DOE claims the trial court should have established YTID’s right by looking at actual, past beneficial use of the water; and DOE asserts YTID’s past actual use does not support the quantity awarded. This will be referred to as the Beneficial Use Issue. The question of whether YTID may have relinquished any water by reason of nonuse will also be addressed under the beneficial use section. DOE’s second assignment of error challenges the trial court’s use of the irrigable acres category instead of the actual irrigated acres category. DOE alleges YTID’s water right should be limited by the number of actual acres previously irrigated. This second assignment of error will be referred to as the Irrigable! Irrigated Issue.
To sum up, four central issues are properly before this court on appeal. They are listed in the order in which they will be discussed:
1. Beneficial Use and Relinquishment;
2. Standby/Reserve;
3. Irrigable/Irrigated; and
4. Reclassification of Irrigable Acres.
Issue One: Beneficial Use and Relinquishment
A. Beneficial Use
A general adjudication is a special form of quiet title action to determine all existing rights to the use of water from a specific body of water. Department of Ecology [755]*755v. Grimes, 121 Wn.2d 459, 466, 852 P.2d 1044 (1993). The procedure is governed by RCW 90.03.110-.245, and the adjudication may not be used to lessen, enlarge or modify existing water rights. Grimes, 121 Wn.2d at 466 (citing RCW 90.03.010). In conducting a water adjudication, the trial court generally considers two elements when confirming existing rights: "(1) the amount of water that has been put to beneficial use and (2) the priority of water rights relative to each other.” Grimes, 121 Wn.2d at 466-67 (footnote omitted). Only the first element, the amount of water that has been put to beneficial use, is at issue here.
The principle that water must be used for a beneficial purpose is a fundamental tenet of the philosophy of water law in the West. 1 Wells A. Hutchins, Water Rights Laws in the Nineteen Western States 9 (U.S. Dep’t of Agriculture 1971). Under both state and federal law, beneficial use is "the basis, the measure and the limit” of the right to the use of water. Ickes v. Fox, 300 U.S. 82, 94, 81 L. Ed. 525, 57 S. Ct. 412 (1937); Neubert v. Yakima-Tieton Irrigation Dist., 117 Wn.2d 232, 237, 814 P.2d 199 (1991); 43 U.S.C. § 372 ("beneficial use shall be the basis, the measure, and the limit of the [water] right.”); see also RCW 90.03.010 ("all waters within the state belong to the public, and any right thereto, or to the use thereof, shall be hereafter acquired only by appropriation for a beneficial use . . . .”). In its Memorandum Opinion Re: Threshold Issues, the trial court acknowledged beneficial use is the measure of a water right under both federal and state law. Clerk’s Papers at 374.
DOE accuses the trial court of ignoring its own legal findings. DOE argues the trial court improperly confirmed a water right to YTID of 110,700 a.f. per irrigation season without making a finding of fact as to whether that quantity has ever been beneficially used. The record supports DOE’s argument.
Instead of basing YTID’s water right on its past beneficial use, the trial court appears to have quantified the right by taking the total amount of water specified in the [756]*7561945 Consent Decree, 114,000 a.f., and reducing that amount to account for the limitations of YTID’s water delivery system. In its entire existence, YTID has never diverted or beneficially used 110,700 a.f. in an irrigation season. The most the District has ever diverted was 109,309 in 1929 — a year of severe drought.
The trial court’s use of the capacity of YTID’s delivery system as a basis for determining YTID’s water right is inconsistent with beneficial use requirements, and it is inconsistent with the trial court’s earlier ruling on another irrigation district’s claim. In 1993, the court issued its Conditional Final Order for the Kittitas Reclamation District. In addressing whether the Kittitas Reclamation District was entitled to the maximum amount of water it could divert through its irrigation system, the court stated, "acknowledging a maximum annual quantity that could have potentially been diverted without requiring beneficial use of that water, would have disastrous implications to the integrity of the Yakima Project . . . .” Clerk’s Papers at 848.
Even though the trial court, in ruling on YTID’s claim, referred to the beneficial use requirement, and even though the trial court correctly applied that requirement in a past ruling, for some reason the court based its quantification of YTID’s water right on the quantity of water the District could potentially divert, without requiring past beneficial use of that water. The trial court must be reversed on the quantification of YTID’s water right. There is no evidence in the record to support a finding that YTID has ever beneficially used 110,700 a.f.
We do not know how much water the court would have confirmed, or the method it would have used to calculate YTID’s water right, had it based the right on actual evidence of beneficial use. On remand, the trial court must calculate beneficial use based upon diversion and actual use, as required by the law of this state.
The parties argue extensively about the effect of the 1945 Consent Decree and water delivery contracts on the [757]*757trial court’s quantification of YTID’s water right. This issue is irrelevant. No party disputes that beneficial use is the sole measure of a water right. The "allocation” of water in the 1945 Consent Decree and water delivery contracts resulted from a settlement agreement between the parties. That agreement may be binding as to the respective rights and priorities amongst the parties, but the agreement cannot be used to avoid statutory requirements and create a state-based water right to any of those parties absent such right being based on actual beneficial use.
B. Relinquishment
When, in a general water adjudication, a court determines a water claimant’s water right based upon evidence of historic beneficial use, the question will often arise whether the claimant has continued to use the same quantity of water up to the present day. If a claimant used a large quantity of water in the first half of the century, but currently uses far less, the court must determine whether the claimant has abandoned or relinquished all or part of the water right.
The issue of abandonment and relinquishment is complex. Prior to 1967, water rights could be lost, or "abandoned,” by nonuse under the common law. See Miller v. Wheeler, 54 Wash. 429, 435, 103 P. 641 (1909). A party challenging abandonment under the common law must show the water user intended to abandon, and actually did relinquish, all or a portion of the water right. Jensen v. Department of Ecology, 102 Wn.2d 109, 115, 685 P.2d 1068 (1984) ("The intent to abandon and an actual relinquishment must concur, for courts will not lightly decree an abandonment of a property so valuable as that of water in an irrigated region.”) (quoting Miller, 54 Wash. at 435). Any challenger who asserts abandonment by YTID, based on YTID’s nonuse of water in the years prior to 1967, must satisfy the common law standard for abandonment.
In 1967 the State Legislature enacted statutes [758]*758codifying the common law principles of abandonment. Laws of 1967, ch. 233, §§ 13-18, at 1125 (codified at RCW 90.14.130 -.180). As of the effective date of the 1967 law, any water right holder who, for a period of five successive years, voluntarily fails, without sufficient cause, to use beneficially all or any part of the water right, will relinquish such right or a portion thereof. RCW 90.14.160. The Legislature created a narrow list of exceptions to the relinquishment statute. RCW 90.14.140. If a water user’s reason for nonuse of all or part of its water right falls under an enumerated exception, such nonuse will not result in relinquishment of that water right. A challenge to YTID’s water right based on nonuse after 1967 must rely on the statutory standards for relinquishment. Once a party has shown that YTID has failed to use any or all of its right for five successive years, YTID has the burden of showing how its nonuse falls under one of the narrow categories in RCW 90.14.140.
In its threshold memorandum and in its rulings on YT-ID’s water right, the trial court refers to the relinquishment issue; but it is unclear whether the court actually made a finding of nonrelinquishment with regard to YT-ID’s water right.
In its threshold memorandum, the trial court discussed whether an irrigation district could theoretically relinquish a water right under RCW 90.14.160. The court first examined the statutory requirement that an entity abandon or voluntarily fail to use a water right. Citing to the fact that the BOR controls the amount of water that is released at any given time, the court stated that it would be very difficult for DOE to prove that an irrigation district had abandoned or voluntarily failed to use its full water right. The court also discussed whether a federal irrigation district would have sufficient cause, under RCW 90.14.140(l)(e), for nonuse of a portion of its water right. The court held that " 'sufficient cause’ for nonuse of a portion of the water is present within the districts and the Basin.” Clerk’s Papers at 395.
[759]*759In its later ruling on YTID’s claim, the court never discussed if the evidence demonstrated whether or not YTID had abandoned or voluntarily failed to use a portion of its water right. Instead, in its Report of the Court, it states no party asserted that YTID had abandoned or voluntarily failed to use this water. However, both the court’s Supplemental Report and DOE’s Response Brief indicate DOE did argue the relinquishment issue below. In its Supplemental Report of the Court, it responded to an exception by DOE regarding quantification and relinquishment by stating, "[T]here is no way to know if relinquishment is an issue.” Clerk’s Papers at 743.
Given that the court never entered findings of fact regarding whether YTID had abandoned or voluntarily failed to use a portion of its water right, we are unable to enter any rulings on this issue. DOE is not estopped from asserting forfeiture on remand. The trial court must employ a two-step analysis when quantifying YTID’s water right. It must first determine YTID’s vested water right, based on evidence of past beneficial use. It should then examine DOE’s claim that YTID has forfeited a portion of its right through abandonment or voluntary non-use.
As discussed above, the trial court stated in its threshold memorandum that, because a federal irrigation district receives its water from the BOR, it has "sufficient cause” under RCW 90.14.140(l)(e) for nonuse of its water. Clerk’s Papers at 395. The court’s interpretation of the statute is questionable. The cited subsection excuses non-use of water if such nonuse is a result of
[flederal laws imposing land or water use restrictions either directly or through the voluntary enrollment of a landowner in a federal program implementing those laws, or acreage limitations, or production quotas.
RCW 90.14.140(l)(e). It is unclear from the record whether an irrigation district, by the mere fact of its receiving water from the BOR, can rely on the cited subsection as an [760]*760excuse for nonuse of water. The issue, however, is not ripe for review at this time. Until the trial court specifically finds, based on the evidence, whether YTID has forfeited a portion of its water right, this court has no basis for knowing what legal standard the trial court will actually apply to the facts. Although the trial court discussed this issue in its threshold memorandum, the court’s interpretation of the statute will not become ripe for review until it relies upon that legal standard as a basis for quantifying a water right. If and when an aggrieved party appeals on such a basis, this court will be able to consider the issue thoroughly, with the advantage of a detailed record and adequate briefing from the parties.
Issue Two: Standby/Reserve
YTID argues the trial court should have classified a portion of its entitlement as standby or reserve water. The court extensively detailed both YTID’s and DOE’s arguments on this issue in its supplemental ruling and declined to apply the designation to any of YTID’s award.
The standby/reserve issue is directly related to the question of relinquishment. If water is held as a standby or reserve water supply to be used in time of drought, then it is not subject to relinquishment by nonuse. RCW 90.14.140(2)(b). If, on remand, the court quantifies YTID’s entitlement by applying the proper beneficial use analysis, and DOE then argues that the quantity awarded should be reduced because of abandonment, the court may have to enter a specific ruling on the standby/reserve question. Until then, the issue is not ripe for review.
YTID implies that any quantity of water described as standby/reserve as a result of this adjudication would protect YTID’s entitlement from future claims of relinquishment. This argument is unsupported by law. No statute authorizes a trial court presiding over a general water adjudication to "classify” a party’s water right as standby/ reserve so as to protect that entitlement from future challenges of nonuse. Whether water is used as standby or [761]*761reserve is a question of fact that is relevant only at the time one asserts relinquishment.
Issue Three: Irrigable /Irrigated
DOE claims the trial court erred when it specified that YTID’s entitlement was appurtenant to 27,900 irrigable acres. DOE claims state law requires the water to be appurtenant to land to which the water has beneficially been applied in the past — i.e., appurtenant to irrigated acres. Implicit in DOE’s argument is the premise that YTID cannot irrigate any land which has not been irrigated historically.
DOE’s arguments are misplaced. When the trial court set YTID’s right as appurtenant to 27,900 irrigable acres, it obtained that number of acres from reports which YTID had compiled and submitted to the BOR. The BOR uses the number of irrigable acres, among other things, as a figure against which to distribute the costs of operating the reclamation project. See 43 U.S.C. § 492. All irrigable lands within the district that are capable of using water from the project, whether or not they actually receive water, must pay a minimum fee toward operation costs. Id. As will be discussed below, the trial court’s reliance on this category of irrigable acres is justified under ROW 90.03.380.
An individual’s water right is appurtenant to the land on which the water is beneficially used; and that individual cannot transfer the use of that water to different land without first requesting DOE approval. RCW 90.03.380. This requirement explains why a water right certificate must specify the land to which the right attaches. In an irrigation district, however, a water right can be transferred and applied to any land within the district without DOE oversight:
A change in place of use by an individual water user or users of water provided by an irrigation district need only receive approval for the change from the board of directors of [762]*762the district if the use of water continues within the irrigation district!.]
RCW 90.03.380. Although an irrigation district’s water right is legally appurtenant to the land on which the water is applied, the right can be shifted to any land in the district on which the water can be beneficially used — i.e., the right can be applied to any irrigable acreage. For this reason, it makes sense for YTID’s certificate to denote the number of acres to which the water can be applied beneficially. The number of acres irrigated each season may change from year to year; thus, the actual irrigated category is less useful than the irrigable category in denoting the extent of YTID’s water right.
In attacking the trial court’s reference to irrigable acres, DOE implies that YTID’s water right is somehow unlawfully enlarged by making the right appurtenant to irrigable acres rather than irrigated acres. DOE cites Department of Ecology v. Grimes, 121 Wn.2d 459, 852 P.2d 1044 (1993) and Neubert v. Yakima-Tieton Irrigation Dist., 117 Wn.2d 232, 814 P.2d 199 (1991), in support of its argument that the trial court should have focused on actual irrigated acres. Grimes and Neubert involved the court’s analysis of whether the quantity of water used by a claimant was reasonable. Part of the reasonable use analysis requires the court to determine how much water is being used per acre of land, after which the court determines whether the amount applied per acre is useful (beneficial) or wasteful. It is obvious that a reasonable use analysis would have to rely on the irrigated acres category, and not the irrigable acres category. If the trial court applied a reasonable use analysis to establish YTID’s water right, it would have to base that analysis on the number of actual irrigated acres.
The issue revolving around the acreage category that is presented by this appeal, however, involves only the question of what category of acreage should be specified in YT-ID’s water right certificate. As discussed above, it is more appropriate for the certificate to indicate irrigable acre[763]*763age, since YTID can legally distribute its water over any irrigable acreage within the District.
Issue Four: Can the BOR Reclassify YTID’s Acreage?
After ordering that YTID’s water right be appurtenant to the irrigable lands within the District, the court stated, "The current irrigable acreage is subject to change based on future reclassification of the Bureau of Reclamation.” Clerk’s Papers at 764. YTID objects to the inclusion of the "reclassification” language in the trial court’s order. YTID’s objection is without merit.
As mentioned above, the category of irrigable acres is used by the BOR to allocate costs of operating the project. According to the Reclamation Act, the BOR can, upon the request of an irrigation district, recalculate the number of irrigable acres within a district and make amendments to the district’s repayment contract. 43 U.S.C. §§ 485, 485b, 485g. YTID reads the trial court’s language regarding reclassification as somehow allowing BOR to unilaterally reclassify YTID’s acreage without regard to the statutory requirements for undergoing such a reclassification under 43 U.S.C. subch. X (sections 485-485k). This fear is unfounded. The trial court’s language regarding reclassification merely recognizes the possibility that the number of irrigable acres in the District may be recalculated in the future, under federal law. Nothing in the trial court’s order purports to interfere with the statutory requirements necessary for a reclassification of acreage to occur.
We remand this case for further proceedings consistent with our holdings.
Smith, Madsen, Alexander, Talmadge, and Sanders, JJ., concur.