DDW-2024-010870

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, P.E.
Director

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

August 6, 2024

Via Email: [e-mail]
Clint McAffee
Park City Water System
P.O. Box 1480
Park City, Utah 84060

Subject: System-Specific Minimum Sizing Standards—Final Determination
Park City Water System, System #22011, File #11514

Dear Clint McAffee:

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 Park City (the System):

Peak Day Source Demand (gallons/day/ERC) – 877
Average Annual Demand (gallons/year/ERC) – 169,100
Equalization Storage (gallons/ERC) – 463
Fire Storage (gallons) – 4,560,000

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.

Clint McAffee
Page 2 of 4
August 6, 2024

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 in 2022. The System provided comments and worked with the Division
and DWRi to update the water use data and source inventory information which was completed on
July 30, 2024. The 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

Park City Water System is a community system which provides water for indoor and outdoor use
to approximately 10,663 equivalent residential connections and a residential population of 8,500.

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.

Clint McAffee
Page 3 of 4
August 6, 2024

Additional System-Specific Basis for Determinations

The Division established Fire Storage requirements based on information taken from your master
plan through consultation with your local fire authority.
The System agreed with the Division’s policy to use a variability factor for the Peak Day
Demand/Equalization Storage of 0%.
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 for all the System’s sources.
Using total system-wide safe 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

Clint McAffee
Page 4 of 4
August 6, 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: Nathan Brooks, Summit County Health Department, [e-mail]
Clint McAffee, P.E., Park City, [e-mail]
Julie Cobleigh, P.E., Division of Drinking Water, [e-mail]
Ted Black, Office of the State Fire Marshal, [e-mail]

Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards
Date Standard Effective: Wed May 29 10:25:03 MDT 2024
Peak Day Source Demand per ERC (gal/day): 877
Average Annual Demand per ERC (gal/year): 169,100
Equalization Storage per ERC (gal/day): 463
PARK CITY WATER SYSTEM PWS ID: UTAH22011
Admin Name: CLINT MCAFFEE
Address: P.O. Box 1480
City, State, Zip: Park City, UT 84060
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 8,500
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2021, 2022, 2023
Peak Day Source Demand per ERC (gal/day): 877
Average Annual Demand per ERC (gal/year): 169,100
Equalization Storage per ERC (gal): 463
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
877
169,100
463
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 463
Existing Storage (gal): 14,946,000
ERCs: 10,663
Required Storage w/o Fire Flow: 4,936,969
Required Fire Storage (gal): 4,560,000
Required Storage w/Fire (gal): 9,496,969
Storage Deficiency: 0
Storage Deficiency (%): 0.0
No Storage Deficiency
Peak Day Source Demand per ERC (gpm): 0.61
Existing Source Capacity (gpm): 12,267
ERCs: 10,663
Required Source Capacity (gpm): 6,504
Source Deficiency: 0
Source Deficiency (%): 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/year)
Equaliza
tion
Storage
per ERC
(gal/day)
OP
Days
2023 8,187,887 1,741,442,240.79 10,663 768 149,561 410 365
2022 7,227,052 1,827,020,488.92 11,420 633 147,692 405 365
2021 8,224,479 1,602,962,082.81 9,383 877 169,100 463 365
Variability:0.217 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 6,107,078 573 1.34
2022 5,862,585 513 1.23
2021 6,188,961 660 1.33
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
HD001 QUINNS FINISHED WATER SURGE
HD002 BALD EAGLE HYDRO
NF001 QUINNS RAW WATER SURGE
NF002 EMPIRE RAW WATER TANK
ST002 WOODSIDE TANK 500,000
ST003 MASONIC HILL TANK 500,000
ST004 BOOT HILL TANK #1 1,000,000
ST005 THAYNES TANK #2 1,000,000
ST006 THAYNES TANK #1 500,000
ST007 AERIE TANK 1,000,000
ST008 FAIRWAY HILLS TANK 1,000,000
ST009 SOLAMERE TANK 600,000
ST010 IRON CANYON TANK 300,000
ST011 NECK TANK 800,000
ST012 NORTH LAKE FLAT STORAGE 200,000
ST013 SILVER LAKE TANK 600,000
ST014 BALD EAGLE TANK 1,000,000
ST015 QUARRY MOUNTAIN TANK 400,000
ST016 SANDSTONE COVE TANK 250,000
ST017 BOOTHILL TANK #2 2,000,000
ST018 RED CLOUD TANK 1,000,000
ST019 FLAGSTAFF TANK 1,000,000
ST020 PARK CITY HEIGHTS TANK 1,296,000
Storage Totals: 14,946,000GAL
Source ID Source Name Flow Rate (GPM)
WS007 MIDDLE SCHOOL WELL 1,000
WS010 DIVIDE WELL 671
TP015 (WS001, WS006, WS003)3 Kings WTP 5,000
WS003 THIRIOT SPRING
WS011 UTAH26086 JORDANELLE SSD 1,000
TP004 (WS005)Creekside WTP 1,000
*included in the 3 Kings WTP capacity
TP013 (WS013)Quinns WTP/ Rockport intake 3,596
Source Totals: 12,267 GPM