DDW-2025-003328

Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards
Date Standard Effective: Tue Apr 08 15:18:02 MDT 2025
Peak Day Source Demand per ERC (gal/day): 422
Average Annual Demand per ERC (gal/year): 121,936
Equalization Storage per ERC (gal): 333
SPANISH FORK CITY PWS ID: UTAH25003
Admin Name: CORY PIERCE
Address: 40 S Main
City, State, Zip: Spanish Fork, Utah 84660
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 47,169
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2017, 2018, 2019, 2020,
2021, 2022, 2023, 2024
Peak Day Source Demand per ERC (gal/day): 422
Average Annual Demand per ERC (gal/year): 121,936
Equalization Storage per ERC (gal): 333
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
422
121,936
333
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 333
Existing Storage (gal): 13,250,000
ERCs: 18,373
Required Storage w/o Fire Flow: 6,118,209
Required Fire Storage (gal): 120,000
Required Storage w/Fire (gal): 6,238,209
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/year)
Equaliza
tion
Storage
per ERC
(gal)
OP
Days
2024 5,699,133 2,240,453,720.7 18,373 310 121,936 333 366
2023 5,304,854 1,680,804,628.2 16,251 326 103,416 283 365
2022 5,145,187 1,395,675,227.67 16,895 305 82,589 226 365
2021 7,015,572 1,369,708,161.48 16,626 422 82,362 226 365
2020 5,614,412 1,400,022,080.01 15,576 360 89,870 246 366
2019 5,024,622 1,337,540,150.76 14,955 336 89,419 245 365
2018 4,757,424 1,335,490,547.97 14,788 322 90,286 247 365
2017 5,213,616 1,315,251,942.36 14,176 368 92,751 254 365
Variability:0.296 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
2024 5,142,664 280 1.11
2023 5,017,684 309 1.06
2022 4,880,932 289 1.05
2021 4,719,794 284 1.49
2020 5,041,335 324 1.11
2019 4,860,540 325 1.03
2018 4,926,551 333 0.97
2017 4,777,396 337 1.09
CAPACITY CALCULATIONS FOR STORAGE
Peak Day Source Demand per ERC (gpm): 0.29
Existing Source Capacity (gpm): 9,423
ERCs: 18,373
Required Source Capacity (gpm): 5,328
Source Deficiency: 0
Source Deficiency (%): 0.0
No Source Deficiency
CAPACITY CALCULATIONS FOR SOURCES
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
ST003 OAKS 1 RESERVOIR 125,000
ST004 STERLING HOLLOW 1 RESERVOIR 3,000,000
ST005 OAKS 2 RESERVOIR 125,000
ST006 STERLING HOLLOW TANK 5,000,000
ST007 MALCOLM SPRINGS TANK 5,000,000
Storage Totals: 13,250,000 GAL
Source ID Source Name Flow Rate (GPM)
WS014 CANYON ROAD WELL 1,250
WS015 CANYON ELEMENTRY WELL 1,700
WS001 COLD SPRING- UPPER 2,000
WS002 MALCOLM SPRING 2,700
WS012 CRAB SPRING UPPER 370
WS013 CRAB SPRING LOWER 370
WS016 SPRINGVILLE EMERGENCY CONNECTION
WS017 COLD SPRINGS- LOWER 1,033
Source Totals: 9,423 GPM