DDW-2025-001039

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