MT · rules
Mont. Water Right Claim Examination R. 2
Definitions
Rule 2(a). Adjudication definitions. Unless the context
requires otherwise, the following definitions apply in these rules.
(1) “Abstract” means the computer printout of each claim of
an existing water right showing the information submitted on the
original or amended statement of claim, any changes authorized
by these rules or by the water court, remarks noting any obvious
factual or legal issues presented by the claim, and other remarks
explaining the nature and extent of the claimed water right.
(2) “Acreage” means the number of irrigated acres.
(3) “Adjudication” means the judicial determination of water
rights that existed prior to July 1, 1973, including the total or
partial abandonment of existing water rights occurring at any time
before the entry of the final decree.
(4) “Amended Claim” means the contents of a submitted
claim as altered or changed by the claimant as to any matter
contained in the original claim and as allowed by the water court.
(5) “Animal Unit” means a measurement of livestock
numbers. For example, one cow and calf pair is one animal unit,
three pigs are one animal unit, five sheep are one animal unit, and
one horse is 1.5 animal units.
(6) “Appropriate” means to divert, impound or withdraw a
quantity of water for a beneficial use.
(7) “Associated Rights” means more than one water right
used at a common point of diversion, place of use or place of
storage.
(8) “Basin Code” means the respective number/letter
combination used to identify each of the 85 basins in Montana
(e.g. 43QJ) according to the Atlas of Water Resources of Montana
prepared by the Montana water resources board.
(9) “Beneficial Use” means a use of water recognized as
beneficial prior to July 1, 1973 and used for the benefit of the
appropriator, other persons, or the public and may include but not
be limited to irrigation, stock, domestic, fish and wildlife,
industrial, mining, municipal, power generation, and recreational
uses.
(10) “Centralized Record System” means the original,
electronic, microfilm or scanned records of all claims of existing
rights, permits, certificates, applications, ownership updates, and
other documents filed with the department.
(11) “Change in Appropriation Right” means a change made
in accordance with § 85-2-402, MCA.
(12) “Claim” or “Statement of Claim” means a sworn
statement of claim for an existing water right, as defined in § 85-2-
224, MCA, filed with the department upon order of the Montana
supreme court.
(13) “Claimant” means any individual, association,
partnership, corporation, state agency, political subdivision, Tribe,
the United States or any agency of the United States, or any other
entity, who has filed a statement of claim or is successor in
interest to a statement of claim as identified in the centralized
records system.
(14) “Claimant Contact” means communication between the
department and a claimant or claimant's authorized representative
regarding the claimed water right.
(15) “Clarification” means the process by which elements of a
water right are made more complete, clear, concise and
interpretable without changing the intent of the claimed
information.
(16) “Climatic Area” means areas defined by differing
climatic and geographic conditions containing similar crop
consumptive use data as delineated by the United States
Department of Agriculture Natural Resource Conservation Service.
(17) “Decree Abstract” means the abstract that is part of a
water court issued decree. The decree abstract contains the
original or amended claim information, changes authorized by
these rules or the water court, and water court ordered data,
changes and remarks.
(18) “Decreed Right” means a claimed water right determined
in a judicial decree prior to the commencement of this
adjudication or after commencement of this adjudication as
provided in § 85-2-216, MCA.
(19) “Department” means the Montana Department of
Natural Resources and Conservation.
(20) “Enforceable priority date” means a priority date of June
30, 1973, or later, which is administratively assigned to late
claims that are subordinate to valid, timely filed claims and
certain permits in accordance with § 85-2-221(3)(f), MCA.
(21) “Examination” means the process under these rules of
examining, gathering information, and reporting data, facts, and
issues pertaining to the claims of existing water rights. Prior to
the adoption of the Water Right Claim Examination Rules on July
15, 1987, this process was referred to as “verification”.
(22) “Exempt Water Right” means an existing water right for
which a statement of claim did not have to be filed pursuant to §
85-2-222, MCA.
(23) “Existing Water Right” means a right to the use of water
that would be protected under the law as it existed prior to July 1,
1973. The term includes federal non-Indian and Indian reserved
water rights created under federal law and water rights created
under state law.
(24) “Field Investigation" means an on-site inspection, under
§ 85-2-243, MCA, of physical evidence and features relating to the
individual elements of a claimed water right.
(25) “Filed Appropriation Right” means a water right which
has been filed and recorded in the office of the county clerk and
recorder as provided by statute prior to July 1, 1973.
(26) “Final Decree” means the final water court
determination of existing water rights within a basin or subbasin,
as described in § 85-2-234, MCA.
(27) “Flow Rate” means the rate at which water has been
diverted, impounded, or withdrawn from the source for beneficial
use.
(28) “Groundwater” means any water under the surface of
the land including the water under the bed of any stream, lake,
reservoir, or other body of surface water. Section 89-2911, R.C.M.
1947 (1961 Groundwater Code).
(29) “Guideline” means an estimate of reasonable use to be
used as the benchmark for initiating further department review or
claimant contact under these rules. The estimate of reasonable
water use is derived from technical data and recommendations of
the department and adopted by the water court.
(30) “Historical Irrigation” means irrigation that took place
for the first time before July 1, 1973.
(31) “Historical Right” means an existing water right claim.
(32) “Household” means the dwelling, house, or other
domestic facilities where a person, family or social unit lives.
(33) “Implied Claim” means a claim authorized by the water
court to be separated and individually identified when a statement
of claim includes multiple rights.
(34) “Interior Drainage” means an area in which water
drains into a depression from which water only escapes by
evapotranspiration or subsurface drainage. The scale varies from
a small kettle in a glaciated area to a large playa lake, such as the
Great Salt Lake in Utah.
(35) “Irrigation” means the application of water to the land to
eliminate the moisture limitation to crop production. (Soil
Conservation Service, 1979.)
(36) “Irrigation District” means a statutory district created
pursuant to Title 85, Chapter 7, MCA.
(37) “Lake” means a naturally occurring inland body of
water.
(38) “Late Claim” means a claim to an existing water right
forfeited pursuant to the conclusive presumption of abandonment
under § 85-2-226, MCA.
(39) “Legal Land Description” means the description given to
a parcel of land in terms of, but not limited to, quarter section,
section, township, range, and county.
(40) “Means of Diversion” means the structures, facilities, or
methods used to appropriate water from the source of supply. For
instream or inlake appropriations, the means of diversion is
“instream.”
(41) “Microfilm Record” means a photographic film record on
a reduced scale of all paper documents related to a water right.
(42) “Multiple Use” means the same appropriation used for
more than one purpose by a single owner.
(43) “Natural Overflow” means the water that results in the
flooding of land adjoining a stream during high flow with no manmade diversion involved.
(44) “Natural Subirrigation” means a naturally occurring
high water table condition that supplies water for crop use.
(45) “Non-consumptive” means a beneficial use of water that
does not cause a reduction in the source of supply.
(46) “On-site visit” means a field investigation conducted at a
claimant’s invitation.
(47) “Other Uses” means all uses of water for beneficial
purposes other than stockwater, domestic, and irrigation uses.
(48) “Owner” means any person, according to § 85-2-102,
MCA, who has title or interest in water rights or properties.
(49) “Ownership Update” means the updating of the
department’s water right ownership records by the filing of an
Ownership Update Form, Form #608, formerly known as a water
right transfer certificate, pursuant to §§ 85-2-421 through 85-2-
426, MCA. The department’s form does not transfer water rights
or legally determine water right ownership. It updates the
department’s centralized record system to reflect the ownership
identified on the legal documents that actually transfer water
rights.
(50) “Period of Diversion” means the period in a calendar
year when water is diverted, impounded or withdrawn from the
source.
(51) “Period of Use” means the period in a calendar year
when water is used for a specified beneficial use.
(52) “Place of Use” (POU) means the lands, facilities, or sites
where water is beneficially used.
(53) “Point of Diversion” (POD) means the location or
locations where water is diverted from the source. For instream or
inlake appropriations, the point of diversion is the portion of the
source in which the instream or inlake use occurs.
(54) “Preliminary Decree” means the preliminary water court
determination of existing water rights within a basin or subbasin
as described in § 85-2-231, MCA, which precedes the final decree.
(55) “Priority Date” means the allocation date associated
with a beneficial use of water which determines ranking among
water rights, usually expressed by day, month, and year.
(56) “Regional Office” means a branch office established by
the department to provide water right information and assistance
to the public or public agencies.
(57) “Remarks” means statements added to the decree
abstract by the department or the water court to limit or define a
water right, to explain unique aspects of the water right, and to
identify potential factual and legal issues. Remarks that limit,
define, or explain unique aspects of a claim are “clarifying” or
“information” remarks. Remarks that identify potential factual
and legal issues are “issue” remarks.
(58) “Reserved Water Rights” means a right to use water that
is expressly or impliedly reserved by treaty, an act of Congress, or
an executive order.
(59) “Reservoir” means a storage facility, created or
augmented by manmade means that impounds and stores water
for beneficial use.
(60) “Scanned Record” means a digitally scanned record of
paper documents related to a water right.
(61) “Service List” means the list of persons notified of all
future hearings or proceedings relevant to a specific claim or case.
This list may include the claimants and their representatives, any
objectors and their representatives, any persons filing a notice of
intent to appear and their representatives, any counterobjectors
and their representatives, any intervenors and their
representatives, and other persons receiving courtesy notification.
(62) “Source” means the specific supply from which water is
taken for a beneficial use.
(63) “Split Claim” means the division of one water right claim
into two or more separate claims. When a claim is split, one
portion of the claim maintains the original claim number and the
other separated portions are assigned new claim numbers.
(64) “Spring” means a naturally occurring extrusion of
groundwater upon the land surface.
(i) “Developed Spring” means a spring with some manmade development at or below the point of extrusion that brings
additional flow to the surface which would not naturally be
available for use and is classified as groundwater.
(ii) “Undeveloped Spring” means the flow from the spring
is not increased by some development at its point of extrusion
from the ground and is classified as surface water.
(65) “Subbasin” means a designated area that drains surface
water to a common point within a basin.
(66) “Summary Report” means the department’s report to the
Montana water court consisting of individual abstracts, the
claimed and clarified data and a summary of the department's
examination findings for each claim within a basin or subbasin.
(67) “Supplemental Rights” means separate water rights for
the same purpose, owned by the same claimant, and used on
overlapping places of use.
(68) “Surface water” means water occurring at or on the
surface of the ground, including but not limited to any river,
stream, creek, ravine, coulee, undeveloped spring, lake and other
source of water.
(69) “Temporary Preliminary Decree” means a water court
decree, prior to the issuance of the preliminary decree, as
necessary for the orderly administration of existing water rights
pursuant to § 85-2-231, MCA.
(70) “Type of Historical Right” refers to the historical basis of
an existing water right as a decreed right, filed appropriation right,
reserved right or use right.
(71) “Use Right” means a claimed existing water right
perfected by appropriating and putting water to beneficial use
without written notice, filing, or decree.
(72) “Volume” means the amount of water which has been
diverted, impounded, or withdrawn from the source over a period
of time for beneficial use, usually measured in acre-feet per year.
(73) “Water Court” means the water division of the state
courts, presided over by water judges responsible for adjudicating
existing water rights in Montana, as provided for in Title 3,
Chapter 7, MCA.
(74) “Water Judge” means a judge responsible for
adjudicating existing water rights as provided for in Title 3,
Chapter 7, Part 2, MCA.
(75) “Water Master” means a person appointed by a water
judge to assist in the adjudication of existing water rights as
provided for in Title 3, Chapter 7, Part 3, MCA, and Rule 53 of the
Montana Rules of Civil Procedure.
(76) “Water Resources Survey” (WRS) means a survey of
water resources and water rights in Montana on a county basis by
the former state engineer's office or water resources board,
predecessors of the department.
(77) “Water Spreading” means surface flood irrigation
involving the diversion of occasional (flood or runoff) surface water
from natural, usually nonperennial, watercourses by means of
dams, dikes, or ditches, or a combination of these. It differs from
conventional irrigation because it is totally dependent on and
regulated by the availability of water, not crop needs.
(78) “Well” means any artificial opening or excavation in the
ground, however made, by which groundwater can be obtained or
through which it flows under natural pressure or is artificially
withdrawn. Section 89-2911, R.C.M. 1947(1961 Groundwater
Code).
Rule 2(b). Non-adjudication definitions. For additional
definitions concerning post June 30, 1973 terms, see § 85-2-102,
MCA.
Provenance
- Source
- courts.mt.gov
- Retrieved
- 2026-09-15
- Edition
- 2026-09-15
- Content hash
0654c09f6546e13dd840f230bab71695508af361f4285e876b78f0454f503e77
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Unofficial copy of government-published law, reproduced from official sources with full provenance. Not an official publication; verify against official sources before relying on it in a filing. Records in the 'guidance' corpus, and only that corpus, are sub-regulatory (interpretive guidelines, survey procedures) and are not binding law. Validity bounds follow each jurisdiction's declared temporalBasis.