author: KITE, Justice.

text:
    2002 WY 89
    In re the GENERAL ADJUDICATION OF ALL RIGHTS TO USE WATER IN the BIG HORN RIVER SYSTEM and all other Sources, State of Wyoming, Jack Appleby, Brad Bath, Jim Buline, Leah Heathman, Hornecker Livestock, Inc., Ralph Hornecker, Tim Schell, Ralph Urbigkit, Ralph F. "Rusty" and Kathy Urbigkit, and Donald Van Riper, Appellants (Petitioners).
    No. 00-296.
    Supreme Court of Wyoming.
    June 14, 2002.

      Representing Appellants: Sky D Phifer of Phifer Law Office, Lander, WY.
    Representing State of Wyoming: Thomas J. Davidson, Deputy Attorney General, Water and Natural Resources Division; Keith S. Burron, Special Assistant Attorney General, of Associated Legal Group, LLC, and Brian C. Shuck, Special Assistant Attorney General, of Dray, Thomson & Dyekman, P.C., Cheyenne, WY.
    Representing Northern Arapaho Tribe: Richard M. Berley of Ziontz, Chestnut, Var-nell, Berley & Slonim, Seattle, WA.
    Representing Eastern Shoshone Tribe: John Schumacher of. Law Office of John Schumacher, Ft. Washakie, WY.
    Representing United States of America: John C. Cruden, Acting Assistant Attorney General, Environment & Natural Resources Division; John R. Green, Interim United States Attorney, and Carol Statkus and Thomas Roberts, Assistant United States Attorneys, Cheyenne, WY; Lynn Johnson, Sean Donahue, and Jeffrey C. Dobbins, Attorneys, Department of Justice, Washington, DC; and Richard Aldrich, Field Solicitor, Office of the Solicitor, United States Department of the Interior, Billings, MN.
    Before LEHMAN, C.J.; GOLDEN, KITE, and VOIGT, JJ.; and E. JAMES BURKE, D.J.
   KITE, Justice.

[¶1] The appellants.own lands within the Big Horn River System and claim federal reserved water rights as a result of their acquiring properties from Indian allottees. These claims are known as "Walton" claims based on the federal court cases which first identified them. To qualify, Walton claimants must demonstrate their lands were irrigated by their Indian allottee predecessors or the first non-Indian successors irrigated the lands within a reasonable time after they were conveyed. The district court denied these appellants' claims (unsuccessful claimants) finding they failed to show beneficial use of water within a "reasonable time" because they relied upon the construction of the Wind River Irrigation Project to make the water available to their lands and the project was not completed until approximately ten to thirty years after transfer of the allotments. Yet, the district court approved other Walton claims where transfers of the allotments to successor non-Indians occurred significantly later and cloger in time to the completion of the irrigation project. We reverse in part and remand with instructions that unsuccessful claimants who can demonstrate beneficial use within a reasonable time after the federal project facilities became available to their properties are entitled to a reserved right. We affirm the district court's determination that the "reasonable time" to establish beneficial use begins to run when the property first passes from allotment status and is not restarted by a subsequent purchase by an Indian. We also affirm the special master's decision concerning the appropriate weight to be given a proof of appropriation executed in 1948 as evidence of actual irrigation prior to 1910.

FACTS

[¶2] This appeal arises out of the continuing, comprehensive adjudication of the water rights in the Big Horn River System initiated in 1977 in accordance with the provisions of Wyo. Stat. Ann. § 1-87-106 (Lexis-Nexis 2001) and the McCarran Amendment, 483 U.S.C. $ 666 (1976). The purpose of the adjudication was to resolve the issue of what water rights the federal government reserved for the Wind River Indian Reservation's benefit. See Riverton Valley Irrigation District v. Big Horn Canal Association, 899 P.2d 848, 850 (Wyo.1995) (Big Horn V). This immense task resulted in more than 20,000 water rights claims being winnowed down to the seventeen disputed claims now before this court. Id. Through prior appeals to this court, we have provided summaries of the factual and legal background of this litigation. See State v. Owl Creek Irrigation District Members, 458 P.2d 76, 83-86 (Wyo. 1988), cert. granted in part, 488 U.S. 1040, 109 S.Ct. 863, 102 LEd.2d 987, aff'd sub mom. Wyoming v. United States, 492 U.S. 406, 109 S.Ct. 2994, 106 LEd.2d 342 (1989) (Big Horn I), Alexander v. United States, 803 P.2d 61 (Wyo.1990) (Big Horn II); In re General Adjudication of All Rights to Use Water in the Big Horn River System, 885 P.2d 273 (Wyo.1992); Big Horn V, 899 P.2d 848.

[¶3] In the initial appeal, Big Horn I, 753 P.2d 76, this court was called upon to determine whether non-Indian water users could claim a federal reserved right with an 1868 priority date as successors in interest to Indian allottees who received fee lands under the General Allotment Act of 1887 (now 25 U.S.C. §§ 331-358) and reserved water rights through the 1868 Treaty of Fort Bridger, which established the Wind River Indian Reservation. - Winters v. United States, 207 U.S. 564, 28 S.Ct. 207, 52 L.Ed. 340 (1908). Relying on the authority of United States ex rel. Ray v. Hibner, 27 F.2d 909 (D.Idaho 1928), and Colville Confederated Tribes v. Walton, 647 F.2d 42 (9th Cir.1981) (Walton II), we approved Walton rights and held non-Indian purchasers of land from Indian allottees do obtain reserved water rights with an 1868 priority date for the practicably irrigable acreage they can show was irrigated by their Indian predecessors or put under irrigation within a reasonable time after transfer from allotment status. Big Horn I, 758 P.2d at 112-14. These claims became known as Walton claims based upon a series of Ninth Cireuit Court of Appeals cases dealing with rights. of non-Indian purchasers of allotments. Colville Confederated Tribes v. Walton, 460 F.Supp. 1320 (E.D.Wash.1978) (Walton I); Walton II, 647 F.2d 42; Colville Confederated Tribes v. Walton, 752 F.2d 397 (9th Cir.1985) (Walton III). The Big Horn I, 758 P.2d 76, holding was further clarified in Big Horn II, 803 P.2d 61. The matter was remanded with instructions that claimants be granted a reserved right if they met the burden of proof that their lands were either irrigated by their Indian predecessors or placed into irrigation within a reasonable time after the lands were transferred out of Indian ownership.

[¶4] Much of the land within the Wind River Indian Reservation could not be irrigated without construction of substantial storage and conveyance structures. In 1905, H.E. Wadsworth, superintendent and special disbursing agent of the Shoshone Agency, an employee of the Bureau of Indian Affairs, filed multiple state diversion and appropriation permit applications, covering over 1283,-000 acres of reservation land. These state applications were made preparatory to the United States government's development of 'the Wind River Irrigation Project, which proposed construction of storage and conveyance structures to allow irrigation of reservation lands. Throughout the development of the project, from 1905 through the early 19608, the United States requested, and the state engineer granted for "good cause shown," numerous extensions of time to put the water initially claimed in 1905 to beneficial use pursuant to Wyo. Stat. § 41-4-506. Progress on the project, which entailed the construction of a huge network of laterals, canals, and water storage facilities, was steady and continuous yet protracted due to the sheer enormity of the task, incremental appropriation and provision of federal funds, and intervening world events.

[¶5] In the adjudication of over 200 of these Walton claims, only the eleven claimants, the subjects of this appeal, were denied reserved water rights for failure to show beneficial 'use of the water either by their Indian allottee predecessors or within a reasonable time after transfers of ownership. The special master acknowledged in her report that, absent the United States' assistance in constructing the Wind River Irrigation Project, irrigation would not have been possible on any of the Walton claimants' lands. °

[¶6] The special master and the district court referred to the unsuccessful claimants as the "tacking claimants" because of their assertion they were entitled to rely on the efforts of the United States in developing the federal irrigation project to establish their reasonable diligence for Walton rights. The unsuccessful claimants further asserted that, having acquired the reserved water rights through the doctrine of relation back, they should also be entitled to an 1868 reserved water rights priority date like the successful claimants.

[¶7] The unsuccessful claimants' properties passed out of allotment status during the period of 1900-1920, substantially earlier than the successful élaimants' properties. The federal project did not begin delivering water for use until the 1980s and 1940s. Because of the early transfer from allotment status, the period between the transfer and actual use of the project waters by the unsue-cessful claimants was ten to twenty years as compared to a shorter period for the successful claimants who obtained title to the Indian lands much closer in time to the federal project's completion. The special master's conclusions, adopted by the district court, determined the unsuccessful claimants failed to demonstrate beneficial use within a reasonable time after the lands were transferred from the allottees in order to retain the federal reserved water rights they had acquired upon transfers of the allotments. Instead, the special master and district court concluded the unsuccessful claimants held state water rights which were entitled to a 1905 priority based on relation back of the state permit applications.

[¶8] Eleven unsuccessful claimants have appealed the district court's order, which affirmed and adopted the special master's report rejecting their claims. The appeal also raises two additional questions regarding (1) the legal effect of reacquisition of land by an Indian after non-Indian ownership and (2) the special master's decision to reject a sworn proof of appropriation as credible evidence of timely irrigation of land.

DISCUSSION

[¶9] The parties filed a Stipulation to Issues on Appeal on February 7, 2001, to "identify the particular issues ... so as to eliminate the possibility of collateral issues being raised by the parties in the course of briefing, and to enable the parties to compile the documents ... to be included in the joint appendix." The parties agreed the three issues set out in the document were "the only issues before the Court for purposes of the pending appeal." (Emphasis added.) Consistent therewith, we address these issues:

A. Were the special master and district court correct in concluding the tacking claimants could not rely on the United States' diligence in developing the Wind River Irrigation Project to "tack" or "piggy-back" to a federal reserved priority date of 1868 but could benefit from the federal project's state permit priority date of 19057
B. Does the computation of the "reasonable time" element of a Walton claim begin to run when the allotted property first passes out of allotment status or, in the circumstance of land later repurchased by an Indian .owner, from the date title transfers from the most recent Indian owner to a non-Indian?
C. Did the district court err in accepting the special master's determination that a proof of appropriation sworn under oath in 1948 did not provide convincing evidence of irrigation of parcels prior to 1910 due to the thirty-three-year time lapse?

The first two issues clearly present legal, as opposed to factual, questions, and our standard of review neither affords deference nor binds this court to the district court's decision. Eklund v. PRI Environmental, Inc., 2001 WY 55, 110, 25 P.3d 511, 110 (Wyo.2001); Ruwart v. Wagner, 880 P.2d 586, 590 (Wyo.1994); City of Laramie v. Hysong, 808 P.2d 199, 202 (Wyo.1991). The third issue puts a factual finding in question, and we will not disturb a specific factual finding unless it is clearly erroneous or against the great weight of the evidence. Barton v. Barton, 996 P.2d 1, 3 (Wyo.2000).

A. Can Walton Claimants Rely Upon the Wind River Irrigation Project as Evidence of Diligence? -

[¶10] Federal reserved water rights were appurtenant to the allotments when they were sold, and the unsuccessful claimants argued they should be allowed to retain those rights because the properties were irrigated within a reasonable time and with due diligence through the federal government's development of the Wind River Irrigation Project. They contend the district court erred when it concluded as a matter of law they could not rely upon the construction of the Wind River Irrigation Project as evidence of due diligence.

[¶11] The district court's order rejecting the unsuccessful claimants' claims as a matter of law because they relied upon completion of the irrigation project seems misguided for several reasons. First, the federal law of reserved rights relies upon the reasonable diligence standard established in state prior appropriation law to determine the validity of Walton right claims, and reliance upon the irrigation project met that standard. Second, as a matter of law, the doctrine of relation back deems irrigation commenced in 1905 upon the filing of the permit applications, and this legal fiction is capable of constituting diligent exploitation of the reserved rights. If the claimants are legally considered to have commenced appropriation in 1905, they were appropriating water in the eyes of the law when they acquired the allotments. Third, the evidence is undisputed that the irrigation project's proponents ree-ognized the value of the Indian water rights and acted on behalf of the landowners, both Indian and non-Indian, to insure state law was followed to protect those rights. As a matter of law, development of the project can be considered as having been done on behalf of the allottees and their successors. Fourth, Wyoming law is clear that irrigation projects such as this are favored, and the courts have allowed significant time for such projects to be completed while protecting the water rights upon which they rely. Finally, equitable treatment of all the Walton claimants demands that those who acquired their lands early should not be penalized for that fact when claimants who acquired their lands later demonstrated no more diligence and relied on the irrigation project in the same fashion. While we agree with the arguments of the Indian tribes and the federal government that Walton rights must be narrowly construed, that is so because of the disruptive impact of reserved rights on the administration of water rights in general. The fact is, the courts have created these rights and established the rules for determining their scope. Now, we are bound to apply those rules with reason and fairness.

B. What Is the Standard for Reasonable Diligence for Walton Right Claims?

[¶12] In order to resolve what the proper test is for determining "reasonable diligence" sufficient to qualify for a Walton right, we must examine the legal and historical context of reserved rights. All the Woi-ton claimants acquired their Indian predecessors' shares of the federally reserved water rights. Reserved rights is a doctrine by which "the federal government reserves pub-Tic lands for particular purposes, it also impliedly reserves sufficient water to effectuate those purposes." 4 Waters and Water Rights § 87.01 at 218 (Robert E. Beck ed., 1996 Repl). Having a unique nature, these

"reserved" water rights are unlike riparian [] rights or prior appropriation rights, although they contain elements of both. For example, like riparian rights, reserved rights are appurtenant to land; that is, land ownership is the basis of the right. Also like riparian rights, reserved rights are not lost by nonuse. But reserved water can be used on nonriparian lands. And like prior appropriation rights, reserved rights have priority. dates which reflect the security of the right.... However, the priority date for reserved rights is the date of the reservation or earlier, not the date of diversion, as in the case of most appropriation rights.
The chief characteristic of reserved rights is that they are federal rights, grounded on the (mostly implied) intent of the federal government to reserve water for its purposes. - This characteristic serves to distinguish reserved rights from both prior appropriation and riparian rights.

Id. at 218-19 (emphasis added).

[¶13] The United States Supreme Court first recognized reserved rights for Indian reservations in Winters, 207 U.S. 564, 28 S.Ct. 207, 52 L.Ed. 340. Therein, the Supreme Court concluded the Indians reserved certain water rights necessary to accomplish the purpose of the treaty. Although no specific Congressional intent can be cited, the courts have agreed that Congress would have intended such a reservation. 207 U.S. at 576, 28 S.Ct. 207. Ultimately, the courts recognized the rights of individual Indians who had been allotted ownership of specific tracts of land within the reservation the right to "just and equal" distribution of the reserved water. United States v. Powers, 305 U.S. 527, 580, 59 S.Ct. 344, 83 L.Ed. 330 (1989). That right could not be lost by nonuse and was appurtenant to the allottee's land.

[114] Thereafter, the right of the individual Indian allottees to convey their lands for full value with the appurtenant reserved water rights to non-Indians was recognized. Hibner, 27 F2d 909; Skeem v. United States, 278 F. 98 (Oth Cir.1921). The court in Hibner found the transferred reserved water right had a different status because the purpose of protecting the Indian does not apply to a non-Indian. The non-Indian,

as soon as he becomes the owner of the Indian lands, is subject to those general rules of law governing the appropriation and use of the public waters of the state, and would, as grantee of the Indian allotments, be entitled to a water right for the actual acreage that was under irrigation at the time title passed from the Indians, and such increased acreage as he might with reasonable diligence place under irrigation, which would give to him, under the doctrine of relation, the same priority as owned by the Indians; otherwise, the application of any other rule would permit such grantee for an indefinite period to reclaim the balance of his land and withhold the application of the water to a beneficial use, which is against the policy recognized in the development of arid lands.

27 F.2d at 912. Thus, it can be clearly seen, from the beginning of the courts' recognition that reserved rights could be transferred to non-Indians, the overriding concern was that the rights be "subject to those general rules of law governing the appropriation" to ensure their prompt utilization consistent with the "policy recognized in the development of arid lands." Id. That doctrine of prior appropriation, which encouraged water development in the arid West, was embraced by, and in fact born in, the State of Wyoming. Robert B. Keiter & Tim Newcomb, The Wyoming State Constitution, A Reference Guide at 9-10 (1998).

[¶15] The only further articulation of the scope and nature of the reserved rights acquired by non-Indian successors to allottees is contained in the three Walton decisions of the Ninth Circuit Court of Appeals. Walton I, 460 F.Supp. 1320; Walton II, 647 F.2d 42; Walton III, 752 F.2d 8397. The controlling maxim of those cases is the elusive, unarticu-lated but "presumed" Congressional intent. Unfortunately, "(there is nothing to suggest Congress gave any consideration to the transferability of reserved water rights. To resolve this issue, we must determine what Congress would have intended had it considered it." Walton II, 647 F.2d at 49. The court then concluded Congress did not intend to limit the individual Indian's right to transfer the reserved water right. We suggest Congress «also likely intended, once transferred to a non-Indian, that right would. be subject to the generally applicable prior appropriation laws of the respective state. Hibner, 27 F.2d at 912.

[T16] A fundamental difference between a reserved right held by an Indian and one transferred to a non-Indian was that the Indian did not lose the right by nonuse. In contrast, under the prior appropriation doe-trine adopted throughout the arid West, non-use can affect the termination of a water right. The concept that these rights are created by federal law to protect the intent of the original treaties runs throughout the reserved rights cases, and, while in Indian hands, reserved rights cannot be abridged or diminished by state law unlike a water right held by a non-Indian. So, it is not surprising that the Ninth Circuit Court. of Appeals found the non-Indian must exercise the reserved right he receives upon purchasing Indian land to which the right is appurtenant by appropriating it "with reasonable diligence after the passage of title." Walton IL, 647 F.2d at 51. This requirement balanced the allottee's right to transfer with the non-Indian's obligation to comply with existing state law and policy to diligently put the right to use. Congress could not have intended the non-Indian to enjoy the perpetual nature of a right reserved to the Indian by treaty. While it is not necessary to speculate, it does appear logical that, irrespective of the standards articulated by the Walton cases, the non-Indian would be required to use reasonable diligence to maintain any right acquired under state law in any event. It is significant no federal court considering this issue has suggested Congress would have intended to impose further restrictions on the transferred reserved right than already existed under state law.

[¶ 17] What guidance do we have, then, to determine what constitutes reasonable diligence in this context? In the series of Wai-ton cases, Mr. Walton claimed federal reserved rights on 170 acres which had been acquired by. his predecessor from an allottee. Ultimately, the court found only thirty of those acres had been diligently irrigated over the years. No specific number of years was announced as constituting a "reasonable time" or "reasonable diligence." We believe it is significant the Ninth Cireuit Court of Appeals held "[it is appropriate to look to state law for guidance" to determine diligence. Walton III, 752 F.2d at 400. Further, it was stated:

If diligently applied, the priority date of the water right relates back to the initial diversion. The tests developed to determine whether or not an appropriator has been sufficiently diligent in applying water to a beneficial use to justify relating the priority date back to the initial diversion are appropriate to determine how much water Walton's predecessors appropriated with reasonable diligence, after the passage of title.

752 F.2d at 402 (citations omitted). That statement clearly reflects the federal court's determination that, if an appropriator was diligent enough to justify the application of the doctrine of relation back recognized in prior appropriation law, he demonstrated sufficient diligence to successfully preserve a Walton claim. The federal court concluded, citing Washington Supreme Court cases, Mr. Walton did not demonstrate the original irrigation of thirty acres was increased sufficiently to meet the state law standard for enlargement through gradual but sure increases which manifested an original intent to appropriate an increasing amount of water. Walton III, 752 F.2d at 402-03 (citing In Re Waters of Doan Creek, 125 Wash. 14, 215 P. 348, 347 (1928); In Re Water Rights in Alpowa Creek, 129 Wash. 9, 224 P. 29 (1924)). Clearly, had Mr. Walton met the standard for diligence established by state law, the court would likely have recognized a larger reserved right for him.

[¶18] No precedent exists in state or federal law regarding how reasonable diligence in Walton claims should be evaluated when a large, multi-year irrigation project is under construction at the time of the transfer of the allotment and must be built in order to allow irrigation of the former Indian lands. This court has adopted and relied heavily on the above federal court precedent concerning the existence and the scope of federal reserved rights, including Walton rights. We continue to do so in resolving the proper standard for reasonable diligence in the context of those rights. That clear precedent leads us back to our own statutes and case law to determine whether relying upon the construction of a permitted, large irrigation project, when no other means of irrigation is available, constitutes reasonable diligence in putting the lands into irrigation.

C. Legal Effect of Relation Back to 1905

[119] No one disputes these unsue-cessful claimants were within the Wind River Irrigation Project. The permits filed in 1905 constituted the initial step in perfecting water rights for their lands under state law. So long as that project proceeded at a reasonable pace and received proper extensions from the state engineer allowing additional time for the project to be completed and so long as the claimants ultimately irrigated their lands with project waters, the application of the doctrine of relation back directs these claimants be legally considered as having begun irrigation in 1905.

[T20] The doctrine of relation back has been long recognized in Wyoming jurisprudence in both case law and statute. See Campbell v. Wyoming Development Co., 55 Wyo. 347, 100 P.2d 124 (1940); Van Tassel Real Estate & Live Stock Co. v. City of Cheyenne, 49 Wyo. 333, 54 P.2d 906 (1986);

Moyer v. Preston, 6 Wyo. 808, 44 P. 845 (1896); Wyo. Stat. Ann. §§ 41-4-506, 41-3-401(a), 41-4-512 (LexisNexis 2001). The doctrine invokes the "principle by which, when an act is done at one time, it is considered, by a fiction of law, as if done at some antecedent time." 2 Clesson S. Kinney, A Treatise on the Law of Irrigation and Water Rights § 748 at 1284-85 (2d ed.1912). The courts adopted the doctrine solely for the purpose of justice founded in law, reason, and convenience based on broad equitable principles. Id. at 1285. Water law borrowed this property doctrine to protect the appropriator against intervening filings that could subordinate his expected priority between the filing of the permit for an appropriation and the actual physical appropriation. A. Dan Tarlock, Law of Water Rights and Resources § 5:62 at 5-104 (2001). Hence, "[plriority is determined from the date of the manifestation of intent, not the -date of actual application of the water to beneficial use." Id.

[T21] Relation back has always been a flexible doctrine generally used to protect the parties' expectations when an unexpected event occurs. Id. at 5-105. Its application in water law has been necessary to stimulate investment in water development. As it was initially developed, relation back was applied to small ditches and less complex means of water development. Id. Considerable delays in putting water to use suggested speculation and could result in loss of early priority. Id. However, contemporary water projects often entail extended planning, financing, and construction lead times, and, without application of the relation back doctrine, the security of the project's water right could be undermined. Id. This court has noted:

"The law [. ..] does not require impossibilities of the appropriator; neither 'does it require him to do vain or useless things...."
... "[The full enjoyment of the water attempted to be appropriated does not, of course, commence until the works are finally completed and capable of conducting all of the water; but[, as] against all others[ ] subsequently attempting an appropriation of the waters of the same stream, the right of the first appropriator to the use .of the water dates or relates back, by what is known as the doctrine of relation."

Van Tassel Real Estate & Live Stock Co., 54 P.2d at 913 (quoting 2 Kinney, A Treatise on the Law of Irrigation and Water Rights, supra, § 740 at 1280, § 741 at 1281). Relation back encourages the development of water resources by allowing prospective appropriators to initiate appropriation and then complete financing, engineering, and construction aspects of their projects with the understanding that, with diligent pursuit and development, their rights will become absolute upon beneficial use with a priority date of the initial action. 94 C.J.S. Waters § 365 (2001). However, it does not encourage or promote speculation in water rights which have no reasonable probability of maturing into completed appropriations. Id.

[122] In Campbell, we referred to the doctrine of relation back as the "right of gradual development" stating, "courts ought not, we think, take it upon themselves to declare that the right of gradual development was taken away from the defendant company as a matter of law by the mere fact that the development was slow." 100 P.2d at 144. Further, work on one part of a system may constitute reasonable diligence in the completion of the entire system for the purpose of demonstrating reasonable diligence in development of the appropriation. 94 C.J.S. Waters, supra at § 365, City of Lafayelte v. New Anderson Ditch Company, 962 P.2d 955, 961 (Colo.1998) (en banc). Over time, other courts have also responded by adapting the doctrine to better address complex projects. New Anderson Ditch Company, 962 P.2d at 961; Dallas Creek Water Company v. Huey, 988 P.2d 27 (Colo.1997) (en banc); Montana Department of Natural Resources and Conservation v. Intake Water Company, 171 Mont. 416, 558 P.2d 1110 (1976).

[¶23] The doctrine of relation back is significant in this case because the unsue-cessful claimants can be considered to have begun irrigation at the time the permits were filed for the federal project-that is, 1905-- and, as a matter of law, the claimants should be considered to have been acting diligently at the time they acquired the reserved rights from their allottee successors.

D. Wind River Irrigation Project-Intended to Benefit Allottees and Their Successors

[T24] The unsuccessful claimants assert the irrigation project, permitted through the state by an employee of the Bureau of Indian Affairs, was intended to facilitate beneficial use of the reserved water rights. The record strongly, supports the conclusion the federal government's construction of the project and compliance with Wyoming state water law requirements were intended to allow beneficial use of the Indian reserved rights. The original applications for permits to divert, executed by Mr. Wads-worth as superintendent and special disbursing agent of the Shoshone Agency, indicate he is the applicant in his official capacity and the use to which the water will be applied is "the irrigation of Indian lands hereinafter described." ' In a letter to the state engineer dated October 10, 1918, W.S. Hanna, the supervising engineer of the United States Indian Irrigation Service, succinctly explained the policy reasons behind the Indian Irrigation Service's many filings in observance of Wyoming state law:

My understanding [] of the Indian Service attitude in this matter is briefly as follows. Various court decisions have established beyond dispute the prior rights of the Indians to sufficient water for the irrigation of their lands. The filing of requests for permits and requests for extensions of time for proof of beneficial use in compliance with the Wyoming State laws has been systematically followed out. This plan of procedure was suggested in the Act of 1905 which [cleded a portion of the original Indian Reservation. In my opinion the object of this proce[ Jdure is two-fold-viz. Giving public notice of the prior rights of the Indians and the protection of the water rights of purchasers of Indian lands by permitting such purchasers to submit to your office proof of beneficial use and to receive certificate designating the date of the original filing as their priority date. The latter is of extreme importance as large areas [of] the Indian irrigated lands are rapidly passing into white ownership and it is imperative that water rights and especially priorities of water rights be protected as practically the entire value of this land for agricultural purposes is dependent on the validity of the water right.
... [TJracts are constantly being sold to white men and in order to safe-guard the interests of these white men and allow them, after purchasing the land, to have sufficient time in which to make proof of beneficial use, we wish to secure any nee-essary extensions 'of time for proof of beneficial use in accordance with the Wyoming State laws.

This letter was written after the Winters case made it clear the Indians had reserved rights in the treaties which would be extremely valuable given their early priority date.

[125] From the beginning, the United States government's clear purpose was to protect and provide water to the Indian lands. The requests for extensions were also intended to permit the non-Indian purchasers to maintain the water rights they acquired from the Indian allottees by allowing beneficial use when the water was finally available through development of the project. Furthermore, the- United States government dealt with the project and lands within the project as single enterprise as evidenced by the affidavit of Louis Twitchell, former project manager and an employee of the Bureau of Indian Affairs Irrigation Department for over thirty years. Of particular note, Mr. Twichell's affidavit reflects:

4. -In 1957, the BIA was still developing and constructing project structures pursuant to the original permit applications submitted to the State of Wyoming in 1905. A lot of laterals to serve the project lands were built after 1957.
5. Any preexisting private ditches that may have served the lands under this claim were subsumed into the project when the project encompassed those lands. If lands were classified under the project as assessable, those lands have to pay their pro rata share of the project assessments.
6. All of the BIA ditches are run as one project. Money collected for operation and maintenance charges are spent project wide.

[126] This evidence demonstrates the project was intended to irrigate all the lands within the project. Though progress was incremental, it was evident and frequently reported to state water officials. Any private ditches were subsumed by the project when it encompassed the land upon which those ditches were located. One can infer whatever individual expense and effort were made to put private ditches in place pending arrival of the project facilities would be a temporary benefit to be replaced by the project facilities Moreover, those assessable properties within the project were financially invested in the construction through their pro rata share of project assessments.

[127] The tribes argued that the non-Indian successors did not rely upon the existence of the reserved rights when they purchased the allotments. While the legal significance of that fact is arguable, history suggests the opposite. The letter from the project proponents specifically noted the value of the Indian rights as a direct result of the court decisions recognizing such rights, and, without water, the allottees' lands would be valueless. On the other side of the transaction, the non-Indian buyer certainly had notice of the existence of those rights and the on-going irrigation project that would allow those rights to be realized. It stands to reason the value of the lands within the project area increased after 1905 with the proposed construction of the federal irrigation project. Accordingly, it must be assumed that most, if not all, sales of allotments within the project area after that time were with the expectation project waters would ultimately be available to those parcels for irrigation. .

[¶28] A fundamental precept of the doctrine of reserved rights and the General Allotment Act of 1887 was to allow Indians owning allotted lands to sell the property in fee for full valie conveying therewith the appurtenant water rights to the same extent non-Indians could sell fee lands with appurtenant water rights. Absent that, the right to sell the land would be all but worthless to the Indian allottee. Walton I, 460 F.Supp. at 1828; Big Horn I, 758 P.2d at 112-18. By the same reasoning, it is incongruent on one hand to hold the Indian allottees could sell their reserved water rights with their lands for full value but on the other hand to effectively render the reserved rights worthless because, at the time of transfer, the irrigation project which would allow beneficial use of the reserved water was incomplete. Recognizing that we find ourselves at a place in history which requires us to presume what parties would have intended almost a century ago while at the same time knowing they were not sufficiently clairvoyant to foresee the courts' development of the requirements for a Walton right, we conclude the irrigation project, which allowed exploitation of the Indian reserved rights, had to have had an effect on both the value paid and received for the allotments and the actions on the part of the individual non-Indian successors to develop the water rights received with their purchases. The project was constructed to benefit the reserved rights, and our application of the diligence test required for Walton claims must reflect that reality.

[¶29] Relying on the due diligence of others to qualify for a water right essentially by proxy finds support in Wyoming case law:

A man cannot apply for water, or divert it, for idle purposes. He must claim it, if he wants to separate it from the unappropriated body of water. But the claim need not, we think, be personal in the sense that no one else can reap the benefit thereof. That was virtually held in Rutherford v. Lucerne Canal & Power Company, 12 Wyo. 299, 818, 75 P. 445. In that 'case one Pratt made the application and received the permit. The Lucerne Canal & Power Company, which he and others organized, adopted it, proceeded under it, though it was not assigned to it, and diverted the water pursuant thereto. The court held that a third party could not take advantage of the fact that Pratt did not personally fulfill the requirements of the permit. A ditch company in Colorado which diverts water is treated as an intermediate agent for the ultimate user of the water. Farmers' High Line Canal & Reservoir Company v. Southworth, 13 Colo. 111, 130, 21 P. 1028, 4 L.R.A. 767; Wyatt v. Larimer & Weld Irrigation Co., 18 Colo. 298, 308, 33 P. 144, 36 Am. St. Rep. 280. The water user, in such case, receives the benefit of the intent of the ditch company. After all, ... no matter who may initiate the right, if it is perfected the general purpose of an appropriation is accomplished . . . . No good reason, accordingly, appears, if the law is complied with in other respects, why a man should be forbidden to act as volunteer for another in connection with the steps leading up to a perfected appropriation.

Scherck v. Nichols, 55 Wyo. 4, 95 P.2d 74, 79 (1939) (some citations omitted & emphasis added). The district court's decision as a matter of law to ignore the diligence demonstrated by the project on behalf of the claimants was erroneous.

E. Wyoming Law Allows Substantial Time for Completion of Large Irrigation Projects for "Good Cause Shown"

[¶30] Pursuant to § 41-4-506, permit applicants are allowed five years to complete a project and five more years to provide beneficial use. The state engineer can, for "good cause shown," grant extensions of the original construction deadline period. Section 41-4-506. This court noted in Associated Enterprises, Inc. v. Toltec Watershed Improvement District, 578 P.2d 1359, 1365-66 (Wyo.1978):

[Section] 41-4-506 finds its genesis in the common-law concept of due diligence which, in the context of water law, has been expressed as follows:
[The law does not require any unusual or extraordinary efforts, but it does require that which is usual, ordinary, and reasonable. The diligence required in the prosecution of the construction of all works necessary for the diversion and application of water in an attempted appropriation of the same is that constancy or steadfastness of purpose 'or labor which is usual with men engaged in like enterprises, and who desire a speedy accomplishment of their designs.
2 Kinney on Irrigation and Water Rights, p. 1269. .

[131] Over the many decades of the pro-jeet's development, numerous applications for extension were filed that explained the progress made since the last request for extension and reported additional irrigated acreage. By way of example, the August 28, 1920, extension request letter sets out:

The Ray Ditch Main Canal was completed many years ago. The Enlargement of the LeClair-Riverton No. 3 was completed in 1916. In each case the lateral system is not yet complete and some portions of the lands under the systems are unable to receive water at the present time. Work has been carried on each year on every Government system on this Project but our Congressional appropriations have been so reduced that it has been impossible to complete the lateral system on any one unit.... [Oluly a small portion of the most urgent work could be accomplished.

The extension request letter of September 24, 1926, is similar if a bit more positive in developments:

Also during the period of the last extension there has been considerable extension work done on the lateral systems of the various units making it now possible to reach many tracts that were not previously able to receive water deliveries.... [The final completion of the construction work on the lateral systems is therefore dependent on the amounts appropriated for this purpose.

[¶32] All the requested extensions were granted exhibiting the state engi-neexr's conclusion that good cause was shown and adequate progress was being made on the project to warrant protecting the rights created by the original permit applications. We view the fact the project took more than fifty years to finish as not truly relevant. What constitutes reasonable time depends upon the cireumstances in each case and particularly upon the magnitude of the enterprise and the difficulties encountered. Campbell, 100 P.2d at 142. "The question of diligence must be determined in the light of all factors ... including the size and complexity of the project; ... the economic ability of the claimant; and the intervention of outside delaying factors such as wars, strikes and litigation." Colorado River Water Conservation District v. Twin Lakes Reservoir and Canal Company, 171 Colo. 561, 468 P.2d 858, 856 (1970) (en banc) (citations omitted). As long as a water system as a whole is being completed with due diligence, it is inconsequential that a part of it proceeds slowly. The priority applies to the whole project. Colorado River Water Conservation District v. Twin Lakes Reservoir and Canal Company, 181 Colo. 53, 506 P.2d 1226, 1228 (1973) (en banc).

[¶33] The true concern is whether it was continually developed over time without any significant gaps indicating termination or some other significant work stoppage. Lengthy development periods for complex projects are not unknown in our state. The water project in Van Tassel was thirty-three years in duration, and the irrigation project in Campbell took over forty-five years to complete. Van Tassel Real Estate & Live Stock Co., 49 Wyo. 333, 54 P.2d 906; Campbell, 55 Wyo. 347, 100 P.2d 124. Both projects were deemed to have been diligently developed, and those efforts were attributed to the individual appropriators. We see no authority for treating the holder of a Walton right any differently.

F. Differential Treatment of Successful Claimants and Unsuccessful Claimants

[134] The district court found:

8. The Tacking Claimants can not rely upon the diligence of the United States in constructing water conveyances to their property. They may, however rely upon the diligence of the United States under its state permit to provide the Tacking Claimants with a priority date of 1905: ...>

Although the order 'does not explicitly provide a reason for that conclusion, presumably the court believed such reliance failed to demonstrate the claimants' "individual" diligence. However, inconsistently, the court held the unsuccessful claimants could rely on the project for their individual diligence under state law. _

[¶35] The district court confirmed the special master's definition of reasonable dili-genee by finding: .

This Court is convinced that a better policy would be to address this problem in a two step process. First, proof of irrigation within five years of acquisition raises a 'presumption of reasonableness. This presumption can be rebutted as there may be cases when water and a means of applying it to the land was readily available during the five years after acquisition but was not applied.
The second and more difficult step in this process arises when water is not applied to the land within five years after its sale by the allottee. ... Should not reasonableness encompass other factors such as intent, distance and/or obstacles to the water source and diligence? This Court believes that it should. In the event that water is not applied to a beneficial use within five years, the second step would be to look at the due diligence of the allottee's successors in applying. water to a beneficial use. -

The district court further qualified the "reasonable time" description as follows:

There should be no time limit on extensions as measured in days, months or years. It is a factual issue to determine whether the allottee's successors demonstrated "that constancy or steadfastness of purpose or labor which is usual with men engaged in like enterprises, and who desire a speedy accomplishment of designs." «Each claim must be determined on its own merits. If a claimant can make such a showing, the Court will infer reasonableness regardless of the time period after which the allotment was first sold. °

[136] Despite the district court's careful and accurate description of how "reasonable diligence" should be determined, it rejected the unsuccessful claimants' claims, concluding instead, as a matter of law, they could not rely on the gradual development of the federal project over the ten- to twenty-year period after they acquired title to their allotments. We believe the legally appropriate approach would have been for the district court to follow its own outline for determining reasonable diligence and take the same approach evidenced by the Ninth Circuit Court of Appeals when it applied Washington state "due diligence" law to ascertain how much of Mr. Walton's acreage had been diligently irrigated and thus was entitled to a reserved right priority date. Walton III, 752 F.2d at 402-03. We conclude the district court incorrectly ignored state law regarding "reasonable time" and instead found there must be a showing the claimants made an individual effort to irrigate the lands during the time the federal project was under way but incomplete.

[¶37] The Ninth Cireuit Court of Appeals found any restriction on transferability would result in a diminution in value of the Indian's reserved right which must be supported by clear Congressional intent. Walton II, 647 F.2d at 50. Nowhere did Congress. indicate its clear intent, nor do we believe it would have so intended, that transferees of allottees needed to meet a more stringent diligence standard than required for all other water right claimants. We find no authority for concluding the reasonable diligence required for a Walton right and that required to maintain a state water right are different in kind or quality.

[¶38] We are persuaded by the state's argument that a consequence of the district court's order was the successful claimants received preferential and inconsistent treatment as compared to the treatment the unsuccessful claimants received. By way of specific example, we look to two claims, sue-cessful Claim No. 250 and unsuccessful Claim No. 248. Claim No. 250, transferred out of allotted status in 1944, was first irrigated by project waters in 1947 and was found to qualify for the reserved priority. Claim No. 243 on the other hand passed out of allot ment status in 1928, the project sublateral was available to the land in 1936, and irrigation occurred in 1940. Claim No. 248 was irrigated seven years earlier than Claim No. 250, yet it was denied the Walton right for failure to meet the "reasonable time" requirement. - Still, the unsuccessful claim was deemed to have been developed diligently enough to secure a 1905 priority. We can find no support for such disparate treatment in the federal law of reserved rights.

[¶39] The state correctly notes the factual distinctions between successful claimants and unsuccessful claimants fell into three categories: (1) The unsuccessful claimants generally had lands transferred out of Indian ownership significantly earlier than the sue-cessful claimants, thus increasing the time between allotment transfer and beneficial use; (2) the federal project facilities were not extended to the unsuccessful claimants' lands until later phases of the project were completed, also thereby increasing the time between allotment transfer and beneficial use; and (3) in some instances individual unsue-cessful claimants may not have acted diligently to irrigate after the federal project facilities became reasonably available to serve their lands. The state proposes, in order to equalize the "reasonable time" standard between all claimants, that the unsue-cessful claimants be required to demonstrate what lands were put under irrigation with due diligence after the federal project facilities became available to the property. We are persuaded this is the appropriate standard for the unique factual cireumstances this dispute presents.

[¶40] We are dealing in legal fictions intended to impart justice in a reasoned and equitable manner. 2 Kinney, A Treatise on the Law of Irrigation and Water Rights, supra, § 748 at 1285. The "project availability" standard, for lack of a better term, considers all factors and still requires a showing of the individual diligence of the allottees' successors onee water was available. It does not, however, create a different standard for claimants due to either an earlier date or a later date of transfer from allotment status or availability of project water.

[¶41] The tribes and the United States argue the district court's order must be affirmed because Walton rights must be narrowly interpreted to limit their destabilizing effect. At this juncture, we are talking about seventeen claims in addition to the approximately 200 successful claims. We can reasonably infer the "destabilizing effect" is minimal. Further, nothing in this opinion expands the nature or quality of Walton rights or reserved rights. Instead, we are simply applying our state law of "reasonable time" and "due diligence" to the Walton claimants. We would be remiss if we ignored our state law because of an unfounded fear that our holding somehow erodes federal reserved rights. It does not.

[¶42] The tribes and the federal government also argue the purpose of the "reasonable time" requirement for Walton rights is to assure the non-Indian successor intended to make use of the allottee's right to put water to use. This argument is reminiscent of language from Hibner we cited previously that "the application of any other rule would permit such grantee for an indefinite period to reclaim the balance of his land and withhold the application of the water to a beneficial use." 27 F.2d at 912. Simply because the non-Indian was forced to wait for this irrigation project, which was well known to the public and proceeding diligently, does not indicate a lack of intent to use the water, nor does it create an indefinite period of delay which may encourage speculation or uncertainty in water rights administration. If the non-Indian successor took individual action diligently onee water was available, that is satisfactory evidence of his original intent.

[T48] As noted previously, the special master acknowledged in her report that, absent the United States' assistance in constructing the Wind River Irrigation Project, irrigation would not have been possible on any of the Walton claimants' lands. It appears no one contests this determination. If there had been a reasonable means to irrigate any of these properties without the project, the Walton standard and state law would require the irrigation be accomplished through the due diligence of the individual successor to the allottee. We have no intention of altering that requirement by this decision. We hold, under the cireumstances of this case and presuming irrigation was not possible absent the project, in order to establish beneficial use of the reserved water within a reasonable time to retain the federal reserved right, the unsuccessful claimants must demonstrate their efforts to put the lands under irrigation within a reasonable time and with due diligence, as defined by state law, after the federal project facilities became available to the properties. We remand for proceedings consistent with this determination. We anticipate such further proceedings should not require substantial additional evidentiary proceedings; however, this is difficult to tell because the record submitted did not provide the special master's report and recommendation for all claims and, for this reason, is incomplete. The district court must decide whether sufficient evidence exists in the record to determine individual claimants did or did not act with reasonable diligence after the federal project water was available to their lands.

G. "Reasonable Time" Element Dates from Transfer by Original Indian Al-lottee

[144] In two of the claims subject to this appeal, the properties were transferred from allotment status into non-Indian ownership, subsequently were sold to Indian purchasers, and then were conveyed again to non-Indian purchasers. The appellants contend the determination of the "reasonable time" element should run from the most recent conveyance out of Indian ownership. The district court held the calculation of "reasonable time" begins when the allotted property first passes out of allotment status, and we agree.

[145] As noted above, this court in Big Horn I, 758 P.2d 76, relied, in large part, on the precedent of Walton II, 647 F.2d 42, to hold that non-Indian purchasers of land from Indian allottees obtain reserved water rights. In Walton III, 752 F.2d at 402 (emphasis added), it was made even clearer that the pivotal element was the transfer from the allottee:

A careful reading leaves no doubt that the immediate grantee of the original allottee must exercise due diligence to perfect his or her inchoate right to the allottee's ratable share of reserved waters. This interpretation is supported by our reference to Walton II in subsequent cases. - See, e.g., United States v. Anderson, 736 F.2d 1858, 1862 (9th Cir.1984) ("use it or lose it"); United States v. Adair, 7283 F.2d 1394, 1417 (9th Cir.1988), cert. denied, 467 U.S. 1252, 104 S.Ct. 3536, 82 L.Ed.2d 841 (1984).

[146] In Big Horn I, 758 P.2d at 114 (emphasis added), we said:

We have already held that a non-Indian purchaser from an Indian allottee obtains a reserved water right with a treaty priority date, and that his non-Indian successor would likewise succeed to the treaty priority date. There is no reason then to deny the same priority to an Indian or tribal purchaser.

The clear meaning is that an Indian and/or tribal purchaser from an Indian allottee would obtain the same reserved water right with treaty priority date as a mon-Indian purchaser from an Indian allottee.

[T47] To hold, as the appellants suggest, that any interim purchase by an Indian would restart the computation of "reasonable time" would irrevocably undermine the integrity and finality of the water rights adjudication process. There would be no certainty of priority dates because mere repurchase by an Indian successor anywhere in the chain of title would restart the "reasonable time." Further, such a holding could, and perhaps invariably would, lead to collusive transactions by those willing to find a "straw man" for the precise purpose of thwarting established priority dates. Therefore, we affirm this portion of the district court's decision and hold the calculation of "reasonable time" begins with the immediate grantee of the original allottee.

H. Consideration and Weight Given 1943 Proof of Appropriation by the Special Master and as Adopted by the District Court

[148] The district court, affirming the special master, discounted the evidentiary value of a sworn proof of appropriation executed in 1948 offered by Brad Bath to prove beneficial use of water on the subject land before 1910 for Parcels B-2, B-8, and B-5. Mr. Bath was attempting through the document to establish irrigation within a "reasonable time" to qualify for the Walton right. The special master stated:

There is evidence that none of the Singing Rabbit allotment was being irrigated the year before it was first sold to a non-Indian in 1909. Herschel Griffin testified that the allotment 'was under irrigation about 1920. That would be 11 years after the sale. The statement in the proof that beneficial use of the water was completed before 1910 is hardly convincing because the proof was filed 33 years after that date. Therefore, there was no credible evidence that the land was put under irrigation within a reasonable time after its first sale to a non-Indian.

[149] Mr. Bath argues the proof of appropriation was uncontradicted and unim-peached by the tribes and the United States. Therefore, according to Mr. Bath, the court erred by rejecting the evidence.

[150] This issue may have been rendered moot by our holding that unsuccessful claimants, including Mr. Bath, may establish the "reasonable time" factor by demonstrating due individual diligence to utilize reserved waters once project facilities were made available to their properties. Because it cannot be determined from the extant record whether Mr. Bath did exercise such individual diligence, we will consider the matter.

[151] It is well established that " 'the burden of proof is on the party asserting the affirmative of any issue. Morrison v. Reilly, Wyo., 511 P.2d 970 (1978)" " Big Horn I, 753 P.2d at 90 (quoting Osborn v. Manning, 685 P.2d 1121, 1124 (Wyo.1984)); see, e.g., Younglove v. Graham & Hill, 526 P.2d 689, 693 (Wyo.1974) (holding burden of proof is on one asserting an affirmative defense); Hawkeye-Security Insurance Co. v. Apodaca, 524 P.2d 874, 879 (Wyo.1974). The objection involves the sufficiency of the evidence. When addressing a sufficiency-of-the-evidence question, this court looks at only the evidence most favorable to the prevailing party, giving it every favorable inference and leaving out of consideration entirely evidence in conflict therewith. Big Horn I, 753 P.2d at 89; Allstar Video, Inc. v. Baeder, 730 P.2d 796, 798 (Wyo.1986); Wangler v. Federer, 714 P.2d 1209, 1216-17 (Wyo.1986); Tremblay v. Reid, 700 P.2d 891, 392 (Wyo.1985); City of Rock Springs v. Police Protection Association, 610 P.2d 975, 980 (Wyo. 1980). In this same vein, we will not disturb a specific factual finding unless the finding is clearly erroneous or against the great weight of the evidence. Barton, 996 P.2d at 3; Murphy v. Stevens, 645 P.2d 82, 85 (Wyo.1982); Shores v. Lindsey, 591 P.2d 895, 899 (Wyo.1979).

[T52] We cannot conclude the special master's discounting the evidentiary value of the proof of appropriation was clearly erroneous. It is the fact-finder's role to evaluate the evidence as well as weigh the witnesses' credibility. DeWitt v. State, 917 P.2d 1144, 1148 (Wyo.1996). Neither of the individuals who signed the document testified at the hearing, and Herschel Griffin's live testimony indicated the date of the first beneficial use was in the time frame of 1920. The evidence of the actual irrigation was obviously very sparse, and the special master had the opportunity to observe the witness giving testimony. We cannot supplant the fact-finder's judgment absent overwhelming contrary evidence and, therefore, affirm.

SUMMARY

[153] We acknowledge the extraordinary and thoughtful efforts of the district court and the special master in this litigation. However, we conclude requiring allottees' successors in the Wind River Irrigation Project to demonstrate irrigation within a reasonable time after the project water became available to the properties is the proper standard for Walton rights under the circumstances of this case. We reverse in part and remand for further proceedings consistent herewith. Further, we affirm both the district court's determination the "reasonable time" calculation begins when allotted property first passes out of allotment status and the weight given by the special master to the 1943 proof of appropriation for the Bath claim.

[154] Affirmed in part, reversed in part, and remanded.

      . "Both Indian allottees and non-Indian successors of Indian allottees are entitled to reserved water rights with treaty priority dates for the practicably irrigable acreage they are able to demonstrate was either irrigated by their Indian predecessors or put under irrigation within a reasonable time after it was conveyed." Big Horn II, 803 P.2d at 70.

      . We decline to use the "tacking claimants" and "tacking claim" terminology. As will be seen through the course of the Discussion section of this opinion, we are of the belief the majority of the successful claimants also relied on the United States government's diligence in constructing the Wind River Irrigation Project to establish their 1868 priority date. For the sake of clarity and accuracy, we prefer to refer to the various Walton claimants discussed in this opinion as the "successful claimants" and the . "unsuccessful claimants."

      . The issues as framed in the stipulation cited to various numbered paragraphs and pages of the Amended Judgment and Decree (August 30, 2000); the Judgment and Decree (July 30, 1992); and Special Master Dolan's May 4, 1992, Report. The document references have been removed, through paraphrasing, to make the relevant questions more readily discerned. The original language provided:
      Issue 1 (tacking): Are the Amended Judgment and Decree's (August 30, 2000) Findings of Fact Nos. 5, 6, 7, and 8 and Conclusions of Law Nos. 5 (reasonable time element only) and 6, correct with respect to Claim Nos. 243, 244, 262, 286, 287, 288, 291, 292, 293, 324, 351, 371, 375, and 3792 See Exhibit "A" attached hereto for citations of the referenced findings and conclusions. And;
      Are the Judgment and Decree's (July 30, 1992) Finding of Fact No. 10, Conclusion of Law No. 1 (last sentence only), and the Judgment and Decree Ruling Nos. 1 (last sentence only) and 11 correct with respect to Claim Nos. R2 (Hornecker Livestock, Parcels 1 and 4), R8 (DHB & Co. and PLB & Co., Parcels 2, 3, and 5) and R16 (Ralph F. "Rusty" and Kathy Urbigkit, Parcel 2)? Note: In this appeal, no party contests the rule of law established in the first two sentences of said Conclusion of Law No. 1 and Judgment and Decree Ruling No. 1, but each party reserves the right to argue the application of said ruling to the claims referenced under this Issue No. 1. See Exhibit "A" attached hereto for citations of the referenced findings, conclusions, and Judgments.
      Issue 2 (recent Indian 'owner): Are the Amended Judgment and Decree's (August 30, 2000) Finding of Fact No. 9 and Conclusion of Law No. 7, set forth below, correct with respect to Claim Nos. 286, 287, and 288? See Exhibit "A" for citations of the referenced findings and conclusions.
      Issue 3 (credible evidence): Was the Judgment and Decree's (July 30, 1992) adoption of Special Master Dolan's recommendation to deny Walton water rights with respect to Claim No. R8 (DHB & Co. and PLB & Co., Parcels 2, 3, and 5) correct, (specifically referring to the findings and conclusions found at pp. 32-38 of Master Dolan's May 4, 1992 Report)? See Exhibit "B" dttached hereto, containing pp. 32-38 of said Report.

      . Riparian rights are
      the rights of the owners of lands on the banks of watercourses, relating to the water, its use, ownership of soil under the stream, accretions, etc. Term is generally defined as the right which every person through whose land a natural watercourse runs has to benefit of stream as it passes through his land for all useful purposes to which it may be applied.
      Black's Law Dictionary 1327 (6th ed.1990).

      . "[The discussion in [Van Tassel] of the doctrine of relation-the right of gradual development-is applicable herein." Campbell, 100 P.2d at 142.

      . Mr. Hanna later in the letter clarifies that his view of the matter is "substantially the view of the Indian Office in the matter of water rights on the Wind River Indian Reservation."

      . - Straw man or party is described as:
      A "front"; a third party who is put up in name only to take part in a transaction. Nominal party to a transaction; one who acts as an agent for another for 4he purpose of taking title to real property and executing whatever documents and instruments the principal may direct respecting the property. Person who purchases property for another to conceal identity of real purchaser, or to accomplish some purpose otherwise not allowed.
      Black's Law Dictionary 1421 (6th ed.1990).


source: Caselaw Access Project

author: VOIGT, Justice.

license: Public Domain

text:
    2002 WY 90
    In the Matter of the Worker's Compensation Claim of Brett C. YENNE-TULLY, Appellant (Petitioner), v. STATE of Wyoming, ex rel., WYOMING WORKERS' SAFETY AND COMPENSATION DIVISION, Appellee (Respondent).
    No. 01-134.
    Supreme Court of Wyoming.
    June 18, 2002.

      Donald L. Painter, Casper, Wyoming, Representing Appellant.
    Hoke MacMillan, Attorney General; John W. Renneisen, Deputy Attorney General; Gerald L. Laska, Senior Assistant Attorney General; and David L. Delicath, Assistant Attorney General, Cheyenne, Wyoming, Representing Appellee.
    Before LEHMAN, C.J., and GOLDEN, HILL, and VOIGT, JJ., and BRACKLEY, DJ. .
   VOIGT, Justice.

[T1] This is an appeal from an Order Denying Benefits Nune Pro Tune issued by a hearing examiner from the Office of Administrative Hearings (OAH) on April 27, 2001. Brett Yenne-Tully (the appellant) contended that the herniated dise he suffered in 1997 was a second compensable injury resulting from a work-related accident in 1989. The Wyoming Workers' Safety and Compensation Division (the Division) disagreed. The hearing examiner concluded that the medical evidence indicated that the appellant's original injury was not the predominant cause of his subsequent dise herniation and he failed to prove that he was entitled to benefits under the second compensable injury rule. We affirm.

ISSUES

[12] The appellant phrases the issue as:

Whether, when the expert opinion apportions the causation for injury as 70 percent as non-occupational causes and thirty percent to the subject injury, Appellant has failed as a matter of law to meet his burden of proof.

The Division states the issue as:

Whether the Hearing Examiner correctly determined that Appellant's herniated dise in 1997 was not a second compensable injury resulting from his 1989 work-related accident.

FACTS

[13] On September 29, 2000, this Court reversed and remanded this case to the OAH for reconsideration under the second com-pensable injury rule. Yenne-Tully v. Workers' Safety and Compensation Div., Dept. of Employment, 12 P.3d 170 (Wyo.2000). In that opinion, we cited the facts as:

Yenne-Tully suffered his first back injury when a snow fence fell on him in 1982. He received treatment and missed two or three days of work. He had no further back problems until August 1989, when he fell down a flight of stairs while working as a guard at the Wyoming State Penitentiary. CT seans the following summer revealed a dise bulge at the L8-L4 level, as well as "some significant irregularity, primarily at the L5b-S1, more minor at the L4-L5 level." An MRI in December 1991 showed "early degenerative changes of the intervertebral dis[c]l at the LG-S1 level, without herniation." The Division paid for Yenne-Tully's conservative treatment for his back through December 1991. Yenne-Tully continued to lead an active life, but experienced constant back pain and had to leave work early or miss work on many occasions. In December 1997, he awoke one morning and could not move due to extreme pain. An MRI the following month revealed a herniated dise at the L4-L5 level. The dise was surgically repaired in January 1998.
Yenne-Tully sought workers' compensation benefits for his surgery, believing the herniated dise to be causally related to his 1989 fall The Division denied benefits, stating that, "[the current condition is due to a herniation at the L4-L5 level, which was not effected in the original injury." A hearing was held at Yenne-Tully's request on September 28, 1998. Four of his coworkers testified that since the 1989 accident, Yenne-Tully complained of, and exhibited symptoms of, back pain. Exhibits included the report and deposition of a physician appointed by the Division to examine Yenne-Tully and review his medical records.

Id. at 171.

[14] In the second proceeding, the hearing examiner relied on the following stipulated facts, which we quote from the record:

1. Claimant is 38 years old and has been employed as a correctional officer by the Wyoming State Penitentiary since 1986.
2. In August 1989, Claimant sustained an injury to his low back while at work when he fell down a flight of stairs.
3. A CT sean taken in June 1990 revealed dise bulging at the L3-L4 level.
4. A second CT scan taken in July 1990 showed "some significant irregularity, primarily at the L6-S1, more minor at the L4-L§ level.["]
5. An MRI taken in December 1991 revealed "early degenerative changes of the intervertebral dise at the L5-S1 level, without herniation." "
6. Claimant treated conservatively for the two years following his injury.
7. The injury was recognized by Respondent as work related and all medical benefits for services rendered from the date of injury to the date of last treatment in December 1991 were paid in accordance with the Workers' Compensation Law.
8. Claimant has credibly testified that, although he led a very active life since the date of injury, he has been suffering from various degrees of pain in his low back since the injury occurred in August 1989 to his low back.
9. In the years since his last medical treatment in December 1991, he has had to leave work early or take entire days off on numerous occasions because of low back pain.
10. Four of Employee-Claimant's coworkers at the Wyoming State Penitentiary testified that, since his 1989 work-related injury to his low back, Employee-Claimant walks with a [limp] or rolling gait, exhibits pain behavior in the lower back when he bends or rises from a sitting position, uses hands or arms to brace himself when sitting or rising and cannot perform any heavy or aggressive duties, such as restraining inmates.
11. Finally, in December 1997, he awoke in the morning to his alarm clock and could not move to turn if off because of excruciating pain in his low back.
12. An MRI taken in January 1998 revealed a herniated dise at the L4-Lb level.
13. Claimant underwent surgery in January 1998 which successfully repaired the herniation at the L4-L5 level.
14. The only medical opinion on the subject of the causation or inter-relation between the original August 1989 low back injury and the incident of December (1997, when Employee-Claimant could not move to turn off his alarm clock, is submitted in the deposition testimony of Dr. Nielson, which is incorporated in its entirety by this reference.

The hearing examiner further found:

15. Since his 1989 work injury, Yenne-'Tully led an extremely active life outside work including being dragged by a horse 'which resulted in a finger amputation.
16. Dr. Nielson testified that a 1991 MRI of the lumbar spine was essentially normal at the L4-L§ level. In 1997 an MRI of the lumbar spine revealed significant abnormalities including a large herniated dise at the L4-L6 level....
17. Dr. Nielson opined that only 80 percent of the causation of Yenne-Tully's 1997 level herniated dise was the result of the original 1989 work injury. Dr. Nielson apportioned 70 percent to be related to cumulative trauma, including his activity with horses....
18. Because 70 percent of the problem was apportioned to non work-related activities, Yenne-Tully failed to prove by a preponderance of the evidence that his herniated dise at the L4-Lb level was the direct result of his 1989 work injury to his lumbar spine at the L8-L4 level.

[T5] The Division retained a neurosurgeon, Dr. Karl Nielson, who performed an Independent Medical Examination of the appellant on March 8, 1998. Dr. Nielson issued a report at that time and gave deposition testimony on September 1, 1998. He'testified that an MRI in 1991 showed that the appellant's spine was essentially normal at the L4-L5 level, only showing minor disc bulges. He further testified that the herniated dise discovered in 1997 could, in small part, be related to the original injury in 1989, but the primary reason for herniation was attributable to cumulative trauma, some resulting from work, some from avocation, and some from daily living.

[16] This matter came before the OAH on March 27, 2001, and the hearing examiner denied benefits for a second time. The appellant petitioned the district court on May 17, 2001, for review of the OAH's order. The district court certified review to this Court pursuant to W.R.A.P. 12.09(b) on July 2, 2001.

STANDARD OF REVIEW

[T7] When the district court certifies directly to this Court an administrative agency's decision, we review that agency's decision "under the same appellate standards applicable to the reviewing court of the first instance." Matter of Bessemer Mt., 856 P.2d 450, 453 (Wyo.1998), cert. denied, 519 U.S. 1091, 117 S.Ct. 765, 136 L.Ed.2d 712 (1997). Our review is limited to a determination of the factors specified in Wyo. Stat. Ann. § 16-3-1114(c) (LexisNexis 2001). The reviewing court shall:

() Hold unlawful and set aside agency action, findings and conclusions found to be:
(A) Arbitrary, capricious, an abuse of discretion or otherwise not in accordance with law;
* * *
(E) Unsupported by substantial evidence in a case reviewed on the record of an agency hearing provided by statute.

Wyo. Stat. Ann. § 16-8-114(c)(if).

The interpretation and correct application of the provisions of the Wyoming Worker's Compensation Act are a question of law over which our review authority is plenary. Wesaw v. Quality Maintenance, 2001 WY 17, 18, 19 P.3d 500, ¶ 8 (Wyo.2001). We affirm an administrative agency's conclusions of law only if they are in accord with the law. Id. We do not afford any deference to the agency's determination, and we will correct any error made by the agency in either interpreting or applying the law. Id. In reviewing findings of fact, we examine the entire record to determine whether there is substantial evidence to support an agency's findings. Wesaw, 19. If the agency's decision is supported by substantial evidence, we cannot properly substitute our judgment for that of the agency and must uphold the findings on appeal. Id. Substantial evidence is relevant evidence which a reasonable mind might accept in support of the agency's conclusions. Id. It is more than a scintilla of evidence. Id.

In re Jensen, 2001 WY 51, ¶10, 24 P.3d 1133, 1186 (Wyo.2001).

[18] When reviewing a hearing examiner's decision that a worker's compensation claimant has failed to meet the burden of proof, we apply the following principles:

A claimant for worker's compensation benefits has the burden of proving all the essential elements of the claim by a preponderance of the evidence in the contested case hearing. Martinez v. State ex rel. Wyoming Workers' Compensation Div., 917 P.2d 619, 621 (Wyo.1996). When an agency decides that the party charged with the burden of proof has failed to meet that burden, the case is reviewed under the "[alrbitrary, capricious, an abuse of discretion or otherwise not in accordance with law" language of Wyo. Stat. § 16-3-l14(c)@ii) (1990). City of Casper v. Utech, 895 P.2d 449, 452 (Wyo.1995). On appeal the complainant ... has the burden of proving arbitrary administrative action. Knight v. Emvironmental Quality Council of State of Wyo., 805 P.2d 268 (Wyo.1991); Wyoming Bancorporation v. Bonham, 527 P.2d 482, 439 (Wyo.1974);, Marathon Oil Co. v. Welch, 379 P.2d 832, 886 (Wyo.1963); Whitesides v. Council of City of Cheyenne, 78 Wyo. 80, 319 P.2d 520, 526 (1957). The agency, as the trier of fact, is charged with weighing the evidence and determining the credibility of witnesses. Utech, 895 P.2d at 451 .... The deference normally accorded to the findings of fact by a trial court is extended to the administrative agency, and the agency's decision as to the facts will not be overturned unless it is clearly contrary to the overwhelming weight of the evidence. Wyoming Steel & Fab, Inc. v. Robles, 882 P.2d 878, 875 (Wyo.1994). - Demonstrating evidentiary contradictions in the record does not establish the irrationality of the ruling, but we do examine conflicting evidence to determine if the agency reasonably could have made its finding and order based upon all of the evidence before it.

2Pederson v. State ex rel. Wyoming Workers Compensation Div., 989 P.2d 740, 742 (Wyo. 1997); and see Sheth v. State ex rel. Wyoming Workers' Compensation Div., 11 P.3d 375, 878 (Wyo0.2000) and Lunde v. State ex rel. Wyoming Workers' Compensation Div., 6 P.3d 1256, 1258-59 (Wy0.2000).

DISCUSSION

[19] The appellant argues that his 1989 injury was the cause of his herniated disc, which was diagnosed in 1997. The appellant asserts that he is entitled to recover additional worker's compensation benefits because this is a second compensable injury. He argues that an injury is compensable if there is a causal connection between the injury and the condition.

[110] Under the second compen-sable injury rule, a worker who has received a compensable injury and received benefits for that injury can, regardless of the passage of time, receive more benefits for that com-pensable injury without meeting either of the time limits or increased burden of proof found in Wyo. Stat. Aun. § 27-14-605 (Lexis-Nexis 2001). Casper Oil Co. v. Evenson, 888 P.2d 221, 225 (Wyo.1995). In order for a second injury to be compensable, the original compensable injury must be the direct cause of the subsequent injury. State ex rel. Wyoming Workers' Safety and Compensation Div. v. Bruhn, 951 P.2d 378, 377 n. 1 (Wyo.1997).

Wyo. Stat. Ann. § 27-14-102(a)(xi) (Michie 1997) defines a compen-sable injury as:

[AJuy harmful change in the human organism other than normal aging and includes damage to or loss of any artificial replacement and death, arising out of and in the course of employment while at work in or about the premises occupied, used or controlled by the employer and incurred while at work in places where the employer's business requires an employee's presence and which subjects the employee to extra-hazardous duties incident to the business. "Injury" does not include:
seo ok
(G) Any injury resulting primarily from the natural aging process or from the normal activities of day-to-day living, as established by medical evidence supported by objective findings[.]

Any injury "aris[es] out of" the employment when a causal connection exists between the injury and the conditions under which the work is required to be performed. Bruhn, 951 P.2d at 376-77. An injury is not compen-sable if it cannot fairly be traced to the employment as a contributing cause. Id. at 377. In the instant case, a significant causal connection does not exist between the appellant's initial injury in 1989 and discovery of the herniated dise in 1997. According to the medical evidence, the appellant's original injury was not the predominant cause of subsequent dise herniation at the L4-L5 level. This resulted primarily from cumulative trauma occurring outside the workplace.

[112] The appellant concedes that Wyo. Stat. Ann. § 27-14-102(a)(xi)(G) makes an exception for normal aging, but contends that cumulative trauma "would be anything but normal aging." Subsection (G) exeludes not only injuries due primarily to normal aging, but also' those due primarily to the normal activities of day-to-day living. Dr. Nielson described cumulative trauma as "just day to day life" and "the work from daily living..."

[T13] This Court has stated that the phrase "day-to-day living," as used in Wyo. Stat. Ann. § 27-14-102(a)(xi)(G) describes those activities that a worker's employer does not have the right to control. State ex rel. Wyoming Workers' Safety and Compensation Div. v. Sparks, 973 P.2d 507, 511 (Wyo.1999). Common actions such as getting out of a car or bending to pick up a pen are not considered activities of day-to-day living when performed in the course of employment. - In re Worker's Compensation Claim of Keck, 985 P.2d 430, 433 (Wyo.1999); Sellers v. State ex rel. Wyoming Workers' Safety and Compensation Div., 979 P.2d 959, 960 (Wyo.1999). 'Recreational activities, performed outside the workplace, or household chores are beyond the control of the employer and would be characterized as day-to-day living activities. We conclude that the cumulative trauma responsible for the majority of the appellant's injury is attributable to day-to-day living, and the appellant does not have a compensable injury pursuant to Wyo. Stat. Ann. § 27-14-102(a)(xi).

[114] The hearing examiner denied the appellant benefits for his herniated dise, and we conclude that there is substantial evidence to support the hearing examiner's factual findings. We agree with the hearing examiner that the appellant failed to prove that he was entitled to benefits under the second compensable injury rule. The hearing examiner's decision is affirmed.