DDW-2024-012809

Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards

Date Standard Effective: Tue Jan 30 12:16:08 MST 2024
Peak Day Source Demand per ERC (gal/day): 1,359
Average Annual Demand per ERC (gal/day): 273,359
Equalization Storage per ERC (gal/day): 747
SMITHFIELD CITY PWS ID: UTAH03020
Admin Name: JOSHUA DANIEL WRIGHT
Address:
City, State, Zip: ,
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 10,223
DRAFT
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): 1,359
Average Annual Demand per ERC (gal/year): 273,359
Equalization Storage per ERC (gal): 747
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
1,359
273,359
747
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 747
Existing Storage (gal): 4,000,000
ERCs: 4,869
Required Storage w/o Fire Flow: 3,637,143
Required Fire Storage (gal): 840,000
Required Storage w/Fire (gal): 4,477,143
Storage Deficiency: 477,143
Storage Deficiency (%): 10.7
Storage Deficient from Fire Requirement
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 5,777,338 1,211,582,446.71 4,869 1,187 248,861 682 365
2022 5,301,595 1,053,883,596.75 4,862 1,091 216,778 594 365
2021 4,949,676 1,012,207,253.85 4,691 1,055 215,762 591 365
2020 6,073,862 1,221,498,092.64 4,468 1,359 273,359 747 366
2019 5,914,195 1,133,573,717.31 4,405 1,343 257,348 705 365
2018 5,585,086 1,074,578,393.76 4,395 1,271 244,512 670 365
Variability:0.108 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 5,501,100 1,130 1.05
2022 4,234,381 871 1.25
2021 4,702,450 1,002 1.05
2020 5,213,931 1,167 1.16
2019 5,397,564 1,225 1.1
2018 5,600,748 1,274 1
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
Peak Day Source Demand per ERC (gpm): 0.94
Existing Source Capacity (gpm): 5,287
ERCs: 4,869
Required Source Capacity (gpm): 4,577
Source Deficiency: 0
Source Deficiency (%): 0.0
No Source Deficiency
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
ST001 SMITHFIELD CANYON 1 MG (UPPER) TANK 1,000,000
ST002 PARSONS TANK 1MG 1,000,000
ST003 1/2 MG TANK INTERTIED TO ST002 (LOWER)500,000
ST004 DRY CANYON RESERVOIR 1.5 MG 1,500,000
Storage Totals: 4,000,000 GAL
Source ID Source Name Flow Rate (GPM)
WS004 FORRESTER ACRES WELL 1,100
WS005 BIRCH WELL 733
WS001 SMITHFIELD CANYON SPRINGS (8)1,139.3
WS002 MILES SPRING 101.5
WS003 PETERSEN SPRING 214.8
WS006 CENTRAL PARK WELL 2,000
Source Totals: 5,287 GPM