DDW-2025-005911

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

February 7, 2025

Via Email: [e-mail]
Shane Owens
Midway City Water System
P.O. Box 277
Midway, Utah 84049

Subject: 2025 Renewal System-Specific Minimum Sizing Standards—Final Determination
Midway City System, System #26008, File #11537

Dear Shane Owens:

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 Midway City (the
System):

Peak Day Source Demand (gallons/day/ERC) – 843
Average Annual Demand (gallons/year/ERC) – 226,191
Equalization Storage (gallons/ERC) – 620
Fire Storage (gallons) – 180,000

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.

Shane Owens
Page 2 of 4
February 7, 2025

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 January 29, 2025. The Division allowed for 30 days for the System to
review the draft system-specific minimum sizing. The System concurred with the proposed
system-specific minimum sizing standards on January 30, 2025. 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

The System is a community water system in Wasatch County. The system currently has 2,663
residential connections serving an approximate population of 6,865 residents. Additionally, the
System provides water to 36 commercial, 15 industrial, and 20 institutional connections. The
System operates and maintains four (4) active sources, two (2) springs and two (2) wells, and four
(4) storage tanks with the associated distribution lines.

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.
Shane Owens
Page 3 of 4
February 7, 2025

Additional System-Specific Basis for Determinations

The Division established Fire Storage requirements based on information from Kody Potter, P.E.,
of Horrocks Engineers on June 1, 2021.

Storage Capacity

Based on the System’s storage facilities and the storage minimum sizing requirement established
in this letter, the Director hereby determines that the System is compliant with the minimum
storage capacity requirements.

Source Capacity

The Division has adequate documentation of established safe yields (wells) and yields (springs)
for all the System’s sources. Using total system-wide safe yields and yields 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

Email

Shane Owens
Page 4 of 4
February 7, 2025

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 Dani Zebelean,
P.E., of this office, at (3858) 278-5110, or me at [phone].

Sincerely,

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

DZ/mrn/klm

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

cc: Tracy Richardson, Wasatch County Health Department, [e-mail]
Shane Owens, Midway City, [e-mail]
Shane Owens, Midway City, [e-mail]
Dani Zebelean, Division of Drinking Water, [e-mail]
Ted Black, Office of the State Fire Marshal, [e-mail]

DDW-2025-001410
Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards
Date Standard Effective: Thu Jan 30 10:53:22 MST 2025
Peak Day Source Demand per ERC (gal/day): 843
Average Annual Demand per ERC (gal/day): 226,191
Equalization Storage per ERC (gal/day): 620
MIDWAY CITY WATER SYSTEM PWS ID: UTAH26008
Admin Name: ROBERT SHANE OWENS
Address: P.O. Box 277
City, State, Zip: Midway, UT 84049
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 5,200
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2018, 2019, 2020, 2021,
2022, 2023
Peak Day Source Demand per ERC (gal/day): 843
Average Annual Demand per ERC (gal/year): 226,191
Equalization Storage per ERC (gal): 620
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
843
226,191
620
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 620
Existing Storage (gal): 2,650,000
ERCs: 3,136
Required Storage w/o Fire Flow: 1,944,320
Required Fire Storage (gal): 180,000
Required Storage w/Fire (gal): 2,124,320
Storage Deficiency: 0
Storage Deficiency (%): 0.0
No Storage 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/day)
Equaliza
tion
Storage
per ERC
(gal/day)
OP
Days
2023 1,951,847 542,818,888.35 3,136 622 170,666 468 365
2022 2,095,221 542,867,766 3,016 695 179,974 493 365
2021 2,300,508 563,266,038.6 2,874 800 195,957 537 365
2020 2,179,943 610,054,983.69 2,759 790 221,129 604 366
2019 2,131,065 571,565,463.57 2,527 843 226,191 620 365
2018 1,990,949 508,699,030.14 2,403 828 211,675 580 365
Variability:0.305 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 1,830,231 584 1.07
2022 1,761,592 584 1.19
2021 1,928,722 671 1.19
2020 1,706,807 619 1.28
2019 1,474,041 583 1.45
2018 1,656,479 689 1.2
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
Peak Day Source Demand per ERC (gpm): 0.59
Existing Source Capacity (gpm): 2,767
ERCs: 3,136
Required Source Capacity (gpm): 1,850
Source Deficiency: 0
Source Deficiency (%): 0.0
No Source Deficiency
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
ST001 COTTAGES-ON-GREEN TANK 800,000
ST002 ALPENHOF TANK 250,000
ST003 MAHOGANY TANK 800,000
ST005 GERBER SPRING TANK 800,000
Storage Totals: 2,650,000 GAL
Source ID Source Name Flow Rate (GPM)
WS005 ALPENHOF WELL 34
WS001 GERBER SPRING 1,000
WS003 MAHOGONY SPRING 1,318
WS007 ALPENHOF-WEBER WELL 415
WS008 HIGHLAND WELL
Source Totals: 2,767 GPM