This document explains the reporting associated with the storage of natural flow and import water on the Provo River
and in Utah Lake. Such waters are subject to regulation according to priorities of water rights under state law. Return to Index.
Distribution Year :
The reports contain annual (beginning November 1) year-to-date totals reported each month. They are based on average daily
deliveries or storage volumes reported by river commissioners. The November - October year corresponds
to the period reported by the Provo River and Spanish Fork River commissioners. The Weber, Duchesne, and Utah Lake/Jordan
River commissioners report on a calendar year basis. The water year used by most agencies is normally October 1 through
September 30. The use of different year-end dates by the involved entities does not necessarily interfere with this report,
but it is important to remember that different year-end dates result in slightly different annual totals.
Compilation Date :
The compilation date is the day the report was compiled/generated from the data in the Division's database.
Data and accounting/reporting are subject to corrections. Later report versions include the latest data
and/or program revisions. If there are no program or data revisions, a new compilation should produce the same report.
JORDANELLE RESERVOIR:
The Provo River Decree established a 4% transmission loss to all storage/import releases above Heber Valley.
Because of this loss, there is not a 1:1 relation between storage in Deer Creek Reservoir (Provo River) and Jordanelle Reservoir
(Upper Provo River). To remedy this a 4% reserve account was established in Jordanelle Reservoir. It consists of 4% of the
storage contents of Jordanelle Reservoir. Whenever water is stored, 4% of the amount stored enters the Reserve Account and 96% is
identified as new storage under the appropriate source line in the reports. Likewise, whenever 100 ac-ft of water is
used, the net (after loss) amount used (96 ac-ft) is reported as use (delivered to the user) and the 4% loss (4 ac-ft)
comes from the Reserve Account. The Jordanelle Reservoir storage reported without the Reserve Account water is in the same
units (1:1 relation) as Deer Creek Reservoir and Utah Lake. This framework enables water exchanges between Jordanelle and
Deer Creek reservoirs and in some cases Utah Lake. The Jordanelle Reservoir storage reported here in the different accounts
represent "net" units or water that is available to downstream storage users after the 4% loss. The amount released is
always "gross" units (the amount delivered divided by 0.96) and the 4% makes up the transmission losses required by the decree.
The above method of reporting enables exchanges of water between Deer Creek and Utah Lake, but it has two limitations
that must be understood in order to interpret the reported Jordanelle Reservoir storage correctly. One is that the reported
Jordanelle Reservoir storage, use, and evaporation represents the net (96%) of the total use. The remaining 4% of use is
supplied by the 4% Reserve Account. The total Jordanelle Reservoir evaporation loss or other use is the reported loss or
use divided by 0.96. The other limitation that might be confusing is that 2905 ac-ft of the inactive storage in Jordanelle is within
the CUWCD balance carried forward from the previous year, and 121 ac-ft is in the Reserve Account, making a total of 3026 ac-ft
inactive storage. This concept applies only to the Jordanelle Reservoir accounts and does not adversely impact any account
or water user/entity. It enables the water in Jordanelle Reservoir to be reported in net (after loss) units equivalent to downstream
reservoirs.
WCWEP : Wasatch County Water Efficiency Project account in Jordanelle Reservoir (JL)
This is the net amount (less the 4% loss) of water stored under water right change applications by the canal
companies participating in the Wasatch County Water Efficiency Project. The CUWCD insisted the CUWCD account supply
the evaporation losses associated with WCWEP storage. The WCWEP water is stored on a space available basis.
If WCWEP conserved water is delivered to supplement streams in Heber Valley and returns to the river it may be credited
as released from WCWEP storage to the downstream water users. The conditions associated with the WCWEP change
applications are that 88% of the conserved water is released downstream water users within the 12 months following the time it was
conserved/stored. The remaining 12 percent remains in Jordanelle Reservoir on a space-available basis to spill when
the reservoir fills. The 12% is attributed to the evapotranspiration along the canals that were replaced by enclosed
pipelines. The WCWEP balance may at times be negative when spilled conserved water is not available to be released to
downstream users. The negative balance is repaid with the 12% at a later time when the reservoir is not spilling.
Only WCWEP storage releases to downstream users are reported/credited as such. If natural flow is conserved and not
stored it doesn't enter this account and should flow to the next downstream appropriator.
USBR : United States Bureau of Reclamation Wetlands account in Jordanelle Reservoir (JL)
This is the net amount (after 4% loss) of water stored under change applications filed by the USBR to store direct flow
water previously used to irrigate lands inundated by the reservoir. This USBR account is now being used to supply water
to Jordanelle Wetlands, which were constructed in connection with Jordanelle Reservoir to mitigate for reduced riverine
habitat and are located downstream of Jordanelle Dam. Evaporation loss is assessed to this storaage water.
HORS : Head of River Storage account in Jordanelle Reservoir
When Jordanelle Reservoir (JL) was constructed, many of the small reservoirs in the upper Provo River drainage were stabilized
and the water rights were moved to JL. Whenever Head of River Storage (HORS) water is used, it comes from this account
in JL. Water is also transferred into this account each year depending on how much water is stored in Washington Lake.
The three reservoirs remaining in operation (operated by the CUWCD) are Washington, Trial, and Lost. The numbers
reflect the net amount (after the 4% loss) stored/used.
PRWUA : Provo River Water Users Association
The Provo River Water Users Association (PRWUA) operates Deer Creek Reservoir (DC), the Weber-Provo Canal
and Duchesne Tunnel transbasin diversions, and the Murdock Canal (Provo Reservoir Canal) and Salt
Lake Aqueduct Provo River diversions. The PRWUA is not the same as the Provo Reservoir Water User
Company (PRWUC), who own some PRWUA shares. PRWUC and PRWUA use the Murdock Canal and the Weber-Provo
Canal. For more information on the PRWUA, see www.prwua.org
CUWCD : Central Utah Water Conservancy District
The CUWCD is a multi-county public water agency/entity charged with completing and operating the
Central Utah Project. CUWCD operates Jordanelle Reservoir, Washington, Trial, and Lost lakes
(operable headwater reservoirs), Olmsted Diversion and Flowline, Strawberry Tunnel, Syar Tunnel, and
other facilities. CUWCD operates various SCADA telemetry stations to record water measurements.
The net (after 4% loss) water stored and used under the CUWCD's Bonneville Unit water rights (owned by the USBR)
are reported under the CUWCD account. For more information on the CUWCD, see www.cuwcd.com
PRIORITY STORAGE:
Priority Storage is defined under the Utah Lake Distribution Plan as storage not subject to call by downstream prior rights.
Balance from Previous Year
The distribution/storage year begins November 1. The end-of-day balance on October 31 is carried over to the new year
as the starting point for the November 1 data to be applied. It does not include the 4% in the Reserve account, which
is reserved (and carried forward also) to supply the transmission losses associated with storage used. It includes 96%
(2905 Ac-ft) of the inactive storage (3026 Ac-ft). Note that 4% (121 Ac-ft) of inactive storage is also included
under the Reserve Account. The 4% is removed in order to report Jordanelle Reservoir storage in "after-loss" units
equivalent to Deer Creek storage units as explained above.
BU Imports from Upper Lakes
This is storage water transferred (imported) to Jordanelle Reservoir from Washington,
Trial, and Lost Lakes on the Upper Provo River. All other headwater lakes are no
longer used as storage reservoirs. Water stored in the operable reservoirs is stored under the
original storage rights, but most all of this is now available as CUWCD project water to users
above Jordanelle or used as exchange water to enable delivery of PRWUA storage to the same users.
Contracts have been or will be entered between CUWCD, USBR, and the owners of the HORS storage waters
to authorize CUWCD's use of water stored in the operable lakes. The quantity of water reported here
is representative of the net amount of storage water entering Jordanelle from the three operable lakes.
Note that 4% of the imported water enters the Jordanelle Reserve Account to make up the transmission loss.
HORS Change Applications
This is Head of River Storage (HORS) upper lakes water stored in Jordanelle Reservoir
under approved change applications. 96% of HORS storage thus stored is credited directly
to the HORS account here. The remaining 4% is credited to the Jordanelle Reserve Account to make up the
4% transmission loss when HORS storage is released. The amount reported depends on the amount of water
stored in Washington Lake as defined in contracts with HORS storage owners.
Transfer HORS Spill to BU
Under contracts, the owners of the original HORS storage rights are able to
store the unused portion of their storage water in Jordanelle Reservoir on
a space available basis. When there is not space for the holdover, it
is transferred under contract to the CUWCD as Bonneville Unit (BU) water
and entered here. The amount transferred depends on how much HORS holdover is
present when space is no longer available. Once transferred, the water may
not necessarily spill, depending on how much spills, but only CUWCD spills need
to be reported. As usual, the amount reported here does not include the 4%
in the Reserve Account.
Transfer BU to HORS
Each year a block of CUWCD Bonneville Unit (BU) storage water is transferred
to the HORS Account in Jordanelle. The quantity transferred is keyed to how much water
could have been stored in the upper lakes based on how much water is stored in
Washington Lake. As usual, the 4% loss associated with this storage is in the
Jordanelle Reserve Account so the amount reported is the usable storage after the loss.
CUWCD indicated that when Jordanelle fills, 4599 ac-ft gross (4415 ac-ft net 96%) is
transferred from CUWCD's water to the HORS account.
Sources Change Applications
The storage under change applications associated with each account. The WCWEP change
applications are to store conserved water on a space available basis to provide
the historic return flows to the lower Provo River. The USBR storage
is under change applications a17707 & a19213, which was water used on lands inundated
by Jordanelle Reservoir. The HORS account represents net water stored under the
applications that were moved to Jordanelle. The net amount (96%) of the water
stored under these applications is reported on this line and the remaining 4% is
stored under the Reserve Account to provide the 4% loss upon release of storage.
CUWCD Duchesne River Flood
There have been years when Duchesne River water is stored in
Jordanelle Reservoir by the CUWCD as part of an effort to help
alleviate flooding on the Duchesne River. As usual, 4% of whatever water
is stored enters the Jordanelle Reserve Account.
Converted (E398 Replacements)
Water stored under A40523 is converted to Priority Storage under E398 when such water is
replaced in Utah Lake with water from Strawberry Reservoir. The 1994 DC/JL Operating
Agreement outlines when this exchange can occur. Four percent of the water stored in Jordanelle
enters the Jordanelle Reserve Account.
Converted (E3101 & E4319)
Water Converted under these applications is based on Jordan River Primary water rights purchased
by the CUWCD. The applications were approved in 2003. CUWCD indicated that such exchanges would occur
infrequently when water is available on the Jordan River under the purchased rights, but the storage
upstream is not able to convert under the Utah Lake Distribution Plan criteria.
Converted (E3100)
Water converted under this application is based on Jordan River Secondary water rights purchased
by the CUWCD. The application was approved in 2003. CUWCD indicated that such exchanges would occur
infrequently when water is available on the Jordan River under the purchased rights, but the storage
upstream is not able to convert under the Utah Lake Distribution Plan criteria.
Converted (Conversion Criteria)
Water originally stored as System Storage, and later converted to Priority
Storage under the criteria outlined in the State Engineer's Utah Lake Distribution Plan. Four percent
is in the Jordanelle Reserve Account.
Exchange of System 2 w/Deer Creek Priority Storage
This exchange occurs at times when CUWCD's System Storage balance in Deer Creek is insufficient
to exchange with PRWUA System Storage stored in Jordanelle Reservoir. PRWUA System Storage 2 in Jordanelle is
exchanged down to Deer Creek Reservoir with CUWCD Priority Storage in Deer Creek.
Exchange of PRWUA Imports w/DC Priority
This line was added to report year 2001. The CUWCD System Storage balance in Deer
Creek was zero and the exchange of Duchesne import water continued. CUWCD Priority Storage
was exchanged upstream after the System Storage was all exchanged. Alternatively,
import water could have been released from Jordanelle by the Commissioner. This exchange
with Priority Storage is not addressed in the operating agreement, but is made as a distribution
practice to maintain the accounting of storage water.
Exchange of PRWUC Imports
Added to report in year 2000. This is Provo Reservoir Water User Company Echo
Storage and A9580 imports exchanged down to Deer Creek Reservoir with CUWCD storage
stored in Deer Creek. A four percent reserve is retained in Jordanelle. The Echo Storage
or A9580 import water is stored in Jordanelle Reservoir as Priority Storage and Priority
Storage is released from Deer Creek (DC) to supply PRWUC users downstream. There is no
water right for the exchange. It is a distribution practice of the commissioner. Anyone
objecting to this exchange should contact the commissioner. Interested entities should file
a water right application for such exchange to occur in the future.
Wasatch Division Use
Water from Jordanelle Reservoir delivered to companies in and above Heber Valley. The water sources are
defined by company at the time the water is delivered, and individual database stations identify the use
from Jordanelle Reservoir. The WCWEP use is reported here as it is released to provide the historic
return flows to the lower Provo River. The Jordanelle Reserve Account provides the 4% loss
associated with these uses/exchanges.
Release to Deer Creek
Jordanelle Reservoir CUWCD storage water released to Deer Creek Reservoir. This is
the net amount released. The Reserve Account provides the 4% loss. Whenever CUWCD
storage water from Jordanelle Reservoir is used below Deer Creek Reservoir, it is first
released to Deer Creek Reservoir. The HORS Account storage water used below
Deer Creek is also reported here but it passes through Deer Creek Reservoir to the Provo Division users.
Spill
Storage Water released that is available to the next downstream appropriator. As usual,
4% of the spilled water comes from the Reserve Account so the reported net spills must be
divided by 0.96 to obtain the gross amount vacated from storage.
Evaporation
Evaporation losses are distributed daily based on the evaporation reported by the commissioner and the
storage account balances on the previous day. Four percent of the total reservoir evaporation is supplied
by the Reserve Account so the amounts reported on is 96 percent of the total Jordanelle Reservoir evaporation. The
CUWCD indicated they agreed to pay the evaporation losses associated with the portion of the HORS account that is not HORS
Carryover, so the HORS evaporation represents only the portion associated with HORS Carryover.
The CUWCD insisted they also pay the evaporation on the WCWEP water, so it is included under
the CUWCD evaporation loss.
Priority Storage Balance
This is the net acre-feet in each storage account at the end of the time period identified
in the report. All uses, transfers, spills, exchanges, evaporation losses, transmission
losses (in the Reserve Account), etc. have been accounted for. This amount is deliverable
to the water users' point(s) of rediversion.
SYSTEM STORAGE:
System Storage is storage water subject to call under the Utah Lake Distribution Plan by downstream water
users with prior rights. Note that the amounts reported here are the net amounts
available after the 4% transmission loss is subtracted.
Olmsted Water (System 1)
System 1 is Provo River water stored that is subject to the 229 cfs and 200 cfs Olmsted Power rights.
Because the 4% loss must be assessed to water stored in Jordanelle, and additional 4 ac-ft of
water is stored in the Reserve Account for every 96 ac-ft of net Olmsted Water reported here.
When 96 ac-ft of Jordanelle storage is used, 4 ac-ft is released from the Reserve Account to provide the
required 4% transmission loss. The water reported here, along with the 4% stored in the Reserve Account
and is junior to prior downstream rights.
Non-Olmsted
This is the net (after loss) Provo River natural flow water stored in Jordanelle that is in excess
of the Olmsted Power Rights. The net amount may be released or exchanged down to Deer Creek Reservoir.
Non-Olmsted water consists of what is commonly reported as System 2
(PRWUA water immediately exchanged down to Deer Creek with CUWCD water), System 3 (water that
is not immediately exchanged down to Deer Creek and it is not yet known who will store it), and
System 4 (water stored by CUWCD as BU water). Like System 1, whenever System 2, 3, or
4 is stored, 4% of the total water stored enters the Jordanelle Reserve Account and the net amount
is reported here. As usual, the four percent in the Reserve Account associated with Non-Olmsted storage is stored
under the same water rights as the Non-Olmsted storage. Only the net amount is available at
downstream locations.
Exchange of System Storage or Exchange of System Storage 2 w/System
This is System Storage 2 that is exchanged down from Jordanelle Reservoir to Deer Creek
Reservoir with CUWCD storage (likely System 1) already stored in Deer Creek. When
such exchange occurs, the 4% Reserve associated with the water stored in Jordanelle
remains in Jordanelle to supply the loss associated with the water exchanged up, even though
they might be stored under different water rights.
Exchange of System Storage 2 w/Priority
System Storage 2 exchanged down to Deer Creek with CUWCD Priority Storage in Deer Creek. This
first happened in 2003 when there was insufficient system storage in Deer Creek to make the exchange.
Exchange of PRWUA Imports
Weber Canal and/or Duchesne Tunnel PRWUA storage water exchanged down to Deer
Creek Reservoir with CUWCD System Storage (likely System 1) stored in Deer Creek. When
Imports are exchanged down from Jordanelle, 4% of the imports remain in Jordanelle Reserve Account
to make up the 4% transmission loss when the Jordanelle storage is used or released.
Exchange of Class A & Secondary
CUWCD System Storage in Deer Creek Reservoir exchanged upstream to Jordanelle with
Provo Division Class A and Secondary water stored in Jordanelle. The net (after
4% loss) amount is entered here (4% is in Reserve) and is exchanged to Deer Creek Reservoir
with a like amount of CUWCD System Storage in Deer Creek exchanged up to Jordanelle.
The System Storage in Deer Creek becomes natural flow to be released to direct flow users or
possibly stored under temporary change applications as other storage. If it is released, the
return flow goes to Utah Lake and downstream users. If it is stored and not released, it is
recommended that it also be subject to calls on System Storage.
Converted (E398 Replacements)
System Storage converted to Priority Storage with Strawberry Imports/return flows.
Converted (E3101,E4319)
System Storage converted to Priority Storage by exchanging with Jordan River primary water rights.
Converted (E3100)
System Storage converted to Priority Storage by exchanging with Jordan River secondary water rights.
Converted (Conversion Criteria)
System Storage converted to Priority Storage based on Distribution Plan criteria.
Called Downstream by Prior Rights
If Jordan River/Utah Lake rights are not satisfied due to storing water in Jordanelle,
the water stored in Jordanelle is subject to be called upon to satisfy those prior rights.
In year 2000 this line reports the net System Storage released to be stored under
PRWUA rights in Deer Creek, which are also senior to storage in Jordanelle as defined
under the 1994 Operating Agreement.
System Storage Balance
System Storage subject to call under the Utah Lake Distribution Plan.
TOTAL STORAGE
Total storage in the preceding Jordanelle storage accounts. Note that this total doesn't include the 4% Reserve
Account, so the amount reported here (less the 2905 ac-ft net inactive) is the amount available to the
users points of rediversion on the last day of the reporting period.
Reserve Balance
Four percent of all water stored in Jordanelle Reservoir under valid water rights enters this
Reserve Account. The Reserve Account enabled Jordanelle Reservoir storage to be accounted
in Deer Creek Reservoir and Utah Lake units so that exchanges can occur. Whenever storage is released from
Jordanelle, the required 4% transmission loss is supplied by this Reserve Account. Whenever storage is
exchanged with Deer Creek or Utah Lake, the portion in the Reserve Account remains in Jordanelle to
provide the 4% transmission loss on the water exchanged upstream. The Reserve Account was proposed by
the river commissioner and adopted under the authority of the State Engineer for distribution and reporting
purposes. It enables Jordanelle Reservoir storage to be reported in downstream (after loss) units. The total
Reserve Balance is always 4% of (Total Storage + Reserve Balance).
Regulation Balance
The Provo River Commissioner balances storage and use with the daily reservoir contents.
The regulation balance makes up any differences between the natural flow
available and the amount delivered downstream. If storage water is released to prior direct flow rights,
the regulation balance decreases. If direct flow is stored that should be bypassed, the regulation balance
increases. Regulation balance is stored only on a space available basis. Any errors associated with measuring
the daily reservoir content are typically corrected or reflected in the regulation balance (see below). The
balance reported here started on November 1, 1993, and is carried over each year.
Error Balance
When the commissioner data entered in the Division's Database doesn't balance the daily
storage and use, the difference is reported here as the Error Balance. It results
from either (1) the commissioner not reporting all the water entering and leaving
reservoir storage and/or the Regulation Balance, (2) an error in the reporting program
used by the Division of Water Rights to summarize the Commissioner's data, or (3) not
entering the correct data in the database. The daily reservoir reports give an itemized accounting
of when these errors occur. The balance is cumulative beginning November 1, 1993.
Measured Content
This is the daily measured Jordanelle Reservoir content. It is usually based on a daily elevation measurement
and the elevation/capacity relationship developed by the USBR. There is good reason to believe this isn't
the exact reservoir content, but it is assumed to be so in order to account and distribute the water.
If the daily elevation measurement doesn't represent the true contents due to wind, tidal, and/or other
error-producing interferences, the Commissioner may use his regulation balance to smooth out errors so
the deliveries are more constant. Knowing the true storage content is critical in calculating the natural flow.
Minimizing or eliminating the regulation balance during critical times could adversely impact primary rights and
benefit secondary or storage rights. Conversely, excess smoothing of the natural flow beyond what would naturally
occur if the reservoirs didn't exist would benefit the direct flow rights at the expense of secondary or storage rights.
There is no easy way to distinguish or separate measurement-induced errors from natural flow fluctuations. The
allocations of the daily natural flow is therefore somewhat subjective and is left up to the discretion of the
commissioner. Water users are encouraged to review the water distribution allocations.
DEER CREEK RESERVOIR:
PRIORITY STORAGE:
Priority Storage is storage not subject to calls by downstream rights under the Utah Lake Distribution Plan.
Balance from Previous Year
The distribution/storage year begins November 1. The end-of-day balance on October 31 is carried over to the new year
as the starting point for the next day (November 1) data to be added/applied to. This includes inactive storage, which
is 2,868 Ac-ft.
Duchesne Tunnel Direct
PRWUA Duchesne River imports passed through Heber Valley after being assessed
the customary 4% transmission loss. (100% passes through Jordanelle and 96% passes the
Upper Midway Dam and enters Deer Creek as reported here.)
Duchesne Tunnel Exchanged In
PRWUA Duchesne River imports exchanged down to Deer Creek with CUWCD storage in Deer Creek. The 4% loss remains in
the Jordanelle Reserve Account to be released with the CUWCD storage water exchanged up from Deer Creek.
Weber Canal Direct
PRWUA Weber River transbasin diversion water passed through Heber Valley and
was either stored in Deer Creek or used by PRWUA as Extra Allotment water. The 4% loss
is assessed similar to the Duchesne Tunnel above.
Weber Canal Exchanged In
PRWUA Weber River imports stored in Jordanelle and exchanged down to Deer Creek. The
4% loss remains in Jordanelle Reserve to be released with storage water exchanged up
to Jordanelle from Deer Creek.
Change Applications and PRP a1902 & a1903
Water stored under change applications (or without an approved water right application
if change applications don't exist). The a1902 and a1903 applications are to store water
in Deer Creek that was historically used on land now under the reservoir.
Jordanelle Reservoir (Transfer)
Net CUWCD water released from Jordanelle Reservoir to Deer Creek Reservoir.
Converted (A12141 & A12144, E398)
System storage conversions resulting from PRWUA (A12141 & A12144) and CUWCD
(E398) credit in Utah Lake from imported water. The PRWUA have
requested that their credit in Utah Lake be exchanged upstream with the first
Provo River water they store in Deer Creek Reservoir each year. CUWCD can
store Priority Storage water under E398 when replacements are made in Utah
Lake from Strawberry Reservoir for the water stored. Such exchange can only
take place if the credit in Utah Lake doesn't spill before the upstream storage
is available to make the exchange. These exchanges occur daily based on whether
or not the CUWCD requests the exchange.
Converted (E3101 & E4319)
In 2003 exchanges E3100, E3101, and E4319 were approved and there is a need to also include these exchanges as
System Storage converted to Priority Storage. In a letter to the Utah Lake/Jordan River Regional Engineer dated
March 31, 2003, the CUWCD requested that CUWCD's purchased Utah Lake water be exchanged upstream first to Deer Creek
and then to Jordanelle in the following order; E4319, E3101, and E3100. The CUWCD wishes to use these exchanges
to convert System Storage before they exchange Strawberry imports in Utah Lake under E398. This line item is for
the exchange of Primary rights on Jordan River under E3101 and E4319.
Converted (E3100)
CUWCD's purchased secondary rights on the Jordan River used to convert CUWCD System Storage to Priority.
Converted (Conversion Criteria)
System Storage converted to Priority Storage under the criteria set forth in the
State Engineer's Utah Lake Distribution Plan. PRWUA storage in Deer Creek converts
first, followed by CUWCD storage in both Jordanelle and Deer Creek.
PRWUA Use to CUWCD (Leased)
This is storage reported as used under PRWUA use but the user is not identified. The
storage is leased by the CUWCD for later use as CUWCD storage water.
Transfer PRWUA to CUWCD
This entry summarizes several database stations. One station allows lump sum block
transfers from PRWUA to CUWCD that for accounting purposes are not reported as a PRWUA
use. Other stations summarize exchanges of PRWUA water used above Jordanelle Reservoir by
exchange with CUWCD water replaced here with PRWUA water in Deer Creek.
Exchanged to Jordanelle w/System 2
System 2 PRWUA storage in Jordanelle exchanged down to Deer Creek with CUWCD Priority Storage in
Deer Creek Reservoir.
Exchanged to Jordanelle with PRWUA Imports
CUWCD Priority Storage in Deer Creek that is exchanged upstream with PRWUA import water
stored in Jordanelle. This first occurred in 2001, when the System Storage was not sufficient
to exchange all imported water.
Exchanged to Jordanelle with PRWUC Imports
This exchange probably should not occur because there is no water right. PRWUC Import water
is stored in Jordanelle and the net amount (96%) of CUWCD Priority Storage in Deer Creek is
used to supply the water to Provo Reservoir Water User Company.
PRWUA Extra Allotment Use
Whenever Deer Creek initially fills (as determined by the 1994 DC/JL Operating Agreement) or
is declared full by the PRWUA, the PRWUA may elect to draw upon excess water of the
Weber River (and Provo River after Jordanelle fills) to deliver more water to its shareholders
than the storage water represented by PRWUA stock (1 ac-ft per share), provided the
extra allotment is approved by the Secretary of the Department of Interior. Typically the PRWUA will
declare a specific time period during which the stockholders can use extra
allotment water without it being charged to their normal storage
allotment. Such water is accounted as stored and used simultaneously.
For the purposes of this report, extra allotment use could have been combined with the
Storage Use line below. It is reported separately because extra allotment is a useful
indicator of how much PRWUA water is delivered in excess of the normal ac-ft per share allotment.
When extra allotment is declared available, the PRWUA ceases diverting or storing Provo River
water until after Jordanelle fills or is declared full, based on provisions of the operating agreement.
Storage Use
Storage water use from the specified Deer Creek account. In the case of PRWUA, the use
reported here is in addition to the Extra Allotment use reported above.
Spilled to Provo River Rights
Storage water spilled to the next appropriator on the Provo River.
PRWUA should not spill storage water because their water is primarily imported
water which the "next available appropriators" have no right to divert.
Transbasin diversions should cease if PRWUA doesn't have a use for such
imported water. PRWUA bylaws enable stockholders to store their unused
(stockholder holdover) water in Deer Creek (DC) on a space available basis. This water
is also considered PRWUA water and should not physically spill from PRWUA's
account because it contains imported water. (Holdover spills to the carryover
account and is not stored again under a different water right. Both carryover
and stockholder holdover are included in the balance carried forward from the
previous year, and the internal accounting of them is left to the PRWUA.)
CUWCD storage water in DC is usually the first water to spill from DC since
DC does not have flood control storage provisions. It is possible, however, that
CUWCD storage paper spills to excess natural flow and is stored again by the PRWUA as
System 2 storage (under a different water right) in DC without physically
leaving the reservoir.
Evaporation
The daily evaporation losses reported by the Commissioner are divided
according to storage account balances at the end of the previous day.
Priority Storage Balance
Storage balances not subject to calls by downstream users.
SYSTEM STORAGE:
Storage subject to call under the Utah Lake Distribution Plan by downstream water
users with prior rights.
Balance from Previsou Year
Some System storage was carried over at end of Distribution Year 2003. It is
identified as carryover at the beginning of year 2004.
Olmsted Water (System 1)
Water stored in Deer Creek that is subject to the Olmsted Power Rights.
Non-Olmsted
Provo River water stored in Deer Creek that is in excess of the 429 cfs Olmsted Power
rights. This is always stored by the PRWUA except for when PRWUA has declared
extra allotment and is using extra allotment water.
Exchange of System Storage in Jordanelle or System 2 Exchange w/Jordanelle System
PRWUA System 2 exchanged down from Jordanelle with CUWCD System Storage in Deer Creek.
System 2 Exchange w/ Jordanelle Priority
PRWUA System 2 exchanged down from Jordanelle with CUWCD System Storage in Deer Creek.
Exchange of PRWUA Imports in Jordanelle
CUWCD System storage exchange to Jordanelle with PRWUA imports stored in Jordanelle.
Exchange to Jordanelle w/Class A & Secondary
CUWCD System storage exchange to Jordanelle with PRWUA imports stored in Jordanelle.
Converted (A12141 & A12144, E398)
Converted to Priority Storage by replacements in Utah Lake.
Converted (E3101 & E4319)
CUWCD Primary Jordan River rights used to convert System Storage to Priority Storage in Deer Creek.
Converted (E3100)
CUWCD secondary Jordan River rights used to convert System Storage to Priority Storage in Deer Creek.
Converted (Conversion Criteria)
Converted under Distribution Plan criteria when there is sufficient System Storage in Utah Lake.
Called Downstream by Prior Rights or Released to Prior Rights
System storage released to satisfy rights in Utah Lake. Year 2003 was very close to calling down
System Storage to prior rights. System Storage not converted to priority storage is subject to calls by
users on the Jordan River. In 2003 the releases for June sucker fish on the lower Provo River are
included here as System Storage releases by the CUWCD. This helps conserve the Priority Storage in
the upstream reservoirs.
Transfer to CUWCD for Exchange E398. This is System Storage called downstream but instead of being
released to downstream users it is transferred to the CUWCD to exchange it with CUWCD Import water
in Utah Lake to become CUWCD Priority Storage.
System Storage Balance
System Storage balance subject to being called down by prior rights (under the Utah Lake Distribution Plan).
TOTAL STORAGE
Total of System Storage and Priority Storage in each Deer Creek Reservoir account.
Regulation Balance
Water stored or released from Deer Creek Reservoir as part of regulation and distribution of water on the river.
Error Balance
When the reported inflows and outflows and change in content do not balance there is a known error. The error
balance is the total of these errors and represents unreported water stored or released.
Measured Content
The reservoir content is measured with a balance beam manometer calibrated to measures the head or stage of the reservoir.
There are many factors that cause this reading to fluctuate. The commissioner may use his regulation balance to make any
necessary adjustments attributed to the measurement error. For accounting purposes, the measured content is the reported
content of the reservoir each day.
OLMSTED WATER: These are included for information purposes only.
Stored in Deer Creek & Jordanelle Reservoirs
Olmsted Power water stored by PRWUA and CUWCD upstream in Deer Creek and Jordanelle.
Olmsted Power Generation (all sources)
Water delivered to the Olmsted Power Plant from all sources.
UTAH LAKE:
FLOOD
The flood account exists to account for excess water when Utah Lake is above the
normal full compromise elevation. System Storage in Utah Lake is defined as the top 585,000
acre-feet. Whenever Utah Lake is above compromise the excess water is not defined as System
Storage, but is reported here as flood storage. The account is presently set similar to other Utah
Lake import accounts so the reported evaporation is based on the incremental increase in
surface area associated with the flood waters above compromise elevation.
SYSTEM
This is defined as storage water within the top 585,000 ac-ft of space below
compromise content of 870,000 acre feet. System Storage provides most of the lake evaporation loss which
is very significant. It also supplies flow to the upper Jordan River diversions.
Balance from prev. yr.
Account balances forwarded from the end of the last day (October 31) of the
previous distribution year. The distribution year of the Utah Lake/Jordan
River System is January through December. The distribution year for this
report is November through October, which is the same as the Provo
River and Spanish Fork River distribution systems.
Inflow
Water entering an account directly (PRWUA and CUWCD) or calculated (FLOOD and SYSTEM) based on change in
content, releases, and evaporation. When System Storage in Utah Lake is all used and the lake level drops into
Primary Storage, the inflow reported here includes Primary Storage water used to meet the release and evaporation demands.
Return Flow Credit
PRWUA return flow credit is based on the quantity of PRWUA water use
and the import-water component of such use. The method used here closely
matches the method historically used by the PRWUA that was adapted to a daily time period.
Exchanged Upstream
The PRWUA and CUWCD columns report import water in Utah Lake exchanged upstream to Deer Creek and/or
Jordanelle reservoirs to convert upstream System Storage to Priority Storage. Such water is stored under
A12141 & A12144 (PRWUA) or E398 (CUWCD). The CUWCD's purchased Utah Lake/Jordan River water exchanged upstream
in dry years under E3101, E4319, and E3100 applications is not included here because such water is withheld
upstream and does not enter Utah Lake System Storage.
Prim Right Releases
Releases from Utah Lake to primary flow rights downstream.
Sec Right Releases
Releases from Utah Lake to secondary flow rights downstream.
Flood Release
Releases for flood control purposes.
Evaporation
Utah Lake evaporation is calculated based on using a temperature based Modified Blaney
Criddle method. Beginning in 1995 it uses calibrated evaporation coefficients from Research
Report No. 45, "Consumptive Use of Irrigated Crops in Utah." System Storage is assessed evaporation
for the base lake surface area resulting from the Inactive, Primary, and System accounts. The evaporation
attributed to Flood (if any), PRWUA Weber imports, and CUWCD Strawberry imports are based on the increases in surface
area associated with these storage accounts in their respective order with Strawberry imports on top.
Balances
Account balances at the end of the last day in the reporting period.
Inactive Storage
The first 160,000 acre-feet of storage in Utah Lake. This storage is likely
not accessible to the Jordan River pumping station.
Primary Storage
The first 125,000 acre-feet of storage water above the inactive storage. This
water is dedicated for use by holders of primary water rights. Dredging is
possibly required in order to deliver this water from Utah Lake.
Total Storage
This is the Utah Lake contents on the last day of the reporting period as
reported by the Utah Lake/Jordan River Commissioner.
TOTAL SYSTEM STORAGE:
System Storage in Jordanelle, Deer Creek, and Utah Lake combined.
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