DDW-2025-004635

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144830 • Salt Lake City, UT 84114-4830
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper.
State of Utah

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF DRINKING WATER
Nathan Lunstad, Ph.D., P.E.
Director

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

October 22, 2024

Via Email: [e-mail]
West Warren - Warren Improvement District
Melissa Murray
1561 South 7500 West
Ogden, Utah 84404

Subject: System-Specific Minimum Sizing Standards—Final Determination
West Warren - Warren Improvement District, System #29094, File #11935

Dear Melissa Warren:

DETERMINATIONS

Based on the findings set forth below, the Division of Drinking Water (the Division) hereby
establishes the following system-specific minimum sizing standards for West Warren - Warren
Improvement District (the System):

Peak Day Source Demand (gallons/day/ERC) – 1,425
Average Annual Demand (gallons/year/ERC) – 179,609
Equalization Storage (gallons/ERC) – 492
Fire Storage (gallons) – 630,000

Introduction

Pursuant to Utah Code Section 19-4-114, the Director of the Division (Director) is required to
establish system-specific minimum sizing standards based on, among other factors, water use data
submitted to the Division of Water Rights (DWRi). The Director’s determinations may also be based
on engineering analyses and other evidence if this is available. This final determination letter is
addressed to you in your capacity as the Administrative Contact for the System. The Director has
delegated the responsibility for making system-specific minimum sizing standards under Utah Code
Section 19-4-114 to the Engineering Manager for the Division.

Prior to issuing this final determination letter, the Division analyzed applicable DWRi water use data
and sent a draft summary of the Division’s proposed system-specific minimum sizing standards to the
System on July 5, 2024. The System provided comments on July 23, 2024, and August 1, 2024, The
Melissa Murray
Page 2 of 4
October 22, 2024

Division has taken these comments into account in reaching this final determination of the system-
specific minimum sizing standards for the System. A summary of the water use data and calculations
the Division used to make these determinations is attached as part of the administrative record.

Water Use Data Definitions

As used in this Final Determination, the following terms have the following meanings:
Peak Day Source Demand is the total flow into a public water system to meet the demand of the water
system on the day of the highest water consumption in a calendar year.

Average Annual Demand is the total quantity of drinking water flowing into a public water system
within a calendar year.

Total Equivalent Residential Connections (ERCs) term represents the number of residential service
connections and the number of equivalent residential connections for non-residential connections
(commercial, industrial, institutional connections).

Minimum Equalization Storage requirement is a volume that is equivalent to the amount of water
needed to meet the average day culinary demand for public water systems. Equalized storage per ERC
is calculated by dividing the Average Annual Demand per ERC data by the number of operational
days in a year.

Water System Background Facts

West Warren-Warren Improvement District is a community water system with a population of
approximately 1,295 and 612 ERCs.

System-Specific Minimum Sizing Standards—Background

Under Utah Code Section 19-4-114, the legislature required that the Director establish minimum
sizing standards on a system-specific basis instead of statewide, as the Division has done in the past.
System-specific determinations need to be based on system-specific information. The code allows the
Director to rely on water use data submitted to DWRi. Alternatively, a community water system may
perform and submit an engineering study to the Division if the water system’s water use data is not
representative of future use or the water system does not yet have actual water use data. In this matter,
actual water use data was available through DWRi, and an engineering study was not submitted to the
Division for review. Therefore, the Division has relied upon DWRi information and other relevant
data.

Additional System-Specific Basis for Determinations

The Division established Fire Storage requirements based on information provided from David Reed,
Fire Marshal for Weber Fire Department, on October 15, 2024.

Melissa Murray
Page 3 of 4
October 22, 2024

Storage Capacity

The Division has adequate documentation of contract agreements with Weber Basin Water
Conservancy District- Central (UTAH29023) for storage capacity. Based on the System’s storage
agreements and the storage minimum sizing requirement established in this letter, the Director hereby
determines that the System is deficient with the minimum storage capacity requirements.

A deficiency of VF34 will be added to the System’s IPS report due to a lack of storage capacity to
cover the fire flow requirement. This is a minor 15-point deficiency and has no associated timeline to
come into compliance. An updated IPS report is available at https:\\waterlink.utah.gov. Please contact
Jennifer Yee at [phone] or [e-mail] for questions related to the System’s IPS report or
deficiencies.

Source Capacity

The Division has adequate documentation of contract agreements with Weber Basin Water
Conservancy District- Central (UTAH29023) for source capacity. Using the maximum daily purchase
rate and the source minimum sizing requirement established in this letter indicates that the System is
compliant with minimum source capacity requirements.

Effective Date

The determinations made in this letter are effective immediately and will become final 30 days from
the date of this letter unless the System files a contest as provided below.

Notice of Right to Contest

The Director has determined this determination made under Section 19-3-114 qualifies as a “permit
order” within the meaning of Utah Code Section 19-1-301.5(1)(f). See Utah Code § 19-1-301.5(1)(e)
(defining “permit” to include a “plan” or “other administrative authorization”).

The System may contest any determinations made herein by delivering a notice of contest to the
Director. The notice of contest must be in writing and must be delivered to the Director on or before
30 days after the date this letter is signed. There is no particular form for the notice of contest, but it
must include the System’s reasons and rationale for the contest. The Director’s address for purposes of
submitting a notice of contest is as follows:

U.S. Mail

Division of Drinking Water
Attention: Director
P.O. Box 144830
Salt Lake City, UT 84114-4830

Melissa Murray
Page 4 of 4
October 22, 2024

Email

A notice of contest may be submitted to the Director by email, provided, however, that the
Director confirms receipt of the email. The Director’s email address is: [e-mail].
The email submission must be received by the Director before the expiration of the contest
deadline.

If the System files a timely notice of contest, the Director will evaluate the matter and attempt to
resolve the matter through negotiations. If the Director is not able to resolve the matter, the Director
will issue a final agency action regarding the contest. At that point in the process, the System shall
have the right to seek further internal agency and judicial review pursuant to Utah Admin. Code R305-
7 and Utah Code Section 19-1-301.5.

Right to Request Reconsideration

The Director plans to evaluate the determinations made herein every three years. However, this
requirement is not mandatory. At any time, a water system whose system-specific minimum sizing
standards have been established by the Division under Section 19-4-114 may request reconsideration
of the Director’s determinations by submitting a written request. A request for reconsideration shall be
submitted to the Director in the same manner as a notice of contest provided above.

Conclusion

If the System management has any questions regarding this letter, please contact Julie Cobleigh, P.E.,
of this office, at [phone], or me at [phone].

Sincerely,

Michael Newberry, P.E.
Permitting and Engineering Support Manager

JJC/mrn/mdb

Enclosures
1. Utah Department of Environmental Quality Division of Drinking Water Minimum Sizing Standards Summary
Report

cc: Scott, Braeden, Weber-Morgan Health Department, [e-mail]
Melissa Murray, West Warren-Warren Improvement District, [e-mail]
Julie Cobleigh, P.E., Division of Drinking Water, [e-mail]
Jennifer Yee, Division of Drinking Water, [e-mail]
David Reed, Weber Fire District, [e-mail]
Ted Black, Office of the State Fire Marshal, [e-mail]

DDW-2024-012448
Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards
Date Standard Effective: Mon Aug 26 10:38:36 MDT 2024
Peak Day Source Demand per ERC (gal/day): 1,425
Average Annual Demand per ERC (gal/year): 179,609
Equalization Storage per ERC (gal/day): 492
WEST WARREN -WARREN IMPROVEMENT DISTRICT PWS ID: UTAH29094
Admin Name: MELISSA MURRAY
Address: 1561 S 7500 W
City, State, Zip: Ogden, UT 84404
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 1,295
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2021, 2022, 2023
Peak Day Source Demand per ERC (gal/day): 1,425
Average Annual Demand per ERC (gal/year): 179,609
Equalization Storage per ERC (gal): 492
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
1,425
179,609
492
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 492
Existing Storage (gal): 500,000
ERCs: 622
Required Storage w/o Fire Flow: 306,024
Required Fire Storage (gal): 630,000
Required Storage w/Fire (gal): 936,024
Storage Deficiency: 436,024
Storage Deficiency (%): 53
Storage Deficiency
Peak Day Source Demand per ERC (gpm): 0.99
Existing Source Capacity (gpm): 674
ERCs: 622
Required Source Capacity (gpm): 616
Source Deficiency: 0
Source Deficiency (%): 0.0
No Source Deficiency
Year Peak
Day
Source
Demand
(gal/day)
Average
Annual
Demand
(gallons)
ERCs Peak
Demand
per ERC
(gal/day)
Avg
Annual
Demand
per ERC
(gal/yr)
Equaliza
tion
Storage
per ERC
(gal/day)
OP
Days
2023 658,219 104,643,790.14 612 1,076 171,012 469 365
2022 576,756 100,560,877.11 622 927 161,687 443 365
2021 866,763 109,225,255.2 608 1,425 179,609 492 365
Variability:0.023 0.0 0.0 0.0
Year Peak Month Average
(gal/day)
Peak Month Average
per ERD (gal/day)
Ratio of PD/ERC to
Peak Month Avg/ERC
2023 614,386 1,004 1.07
2022 473,955 762 1.22
2021 475,427 782 1.82
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
Storage Totals: 500,000 GAL
Source ID Source Name Flow Rate (GPM)
WS001 UTAH29023 WEBER BASIN WCD - CENTRAL 674
WS002 UTAH29094 BONA VISTA WATER DISTRICT
Source Totals: 674 GPM
* Agreement with Weber Basin WCD-Central - 500,000 GAL