DDW-2025-009272

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

Date Standard Effective: Tue Jan 31 09:47:27 MST 2023
Peak Day Source Demand per ERC (gal/day): 1,517
Average Annual Demand per ERC (gal/day): 370,864
Equalization Storage per ERC (gal/day): 1,013
UKON WATER COMPANY PWS ID: UTAH02014
Admin Name: CRAIG CHRISTOFFERSEN
Address:
City, State, Zip: ,
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 1,133
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2019, 2020, 2021
Max Peak Day Source Demand per ERC (gal/day): 1,264
Max Average Annual Demand per ERC (gal/day): 309,053
Max Equalization Storage per ERC (gal/day): 844
x
x
x
(1 + 0.2)
(1 + 0.2)
(1 + 0.2)
=
=
=
1,516
370,863
1,012
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 1,013
Existing Storage (gal): 280,000
ERCs: 483
Required Storage w/o Fire Flow: 489,279
Required Fire Storage (gal): 60,000
Required Storage w/Fire (gal): 549,279
Storage Deficiency: 269,279
Storage Deficiency (%): 0.0
Storage Deficiency from Fire Requirement
Peak Day Source Demand per ERC (gpm): 1.05
Existing Source Capacity (gpm): 319
ERCs: 483
Required Resource Capacity (gpm): 507
Source Deficiency: 188
Source Deficiency (%): 37.08
Source Deficient
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
2021 332,368 66,408,433.8 483 688 137,492 377 365
2020 293,265 71,700,254.04 232 1,264 309,053 844 366
2019 316,075 72,153,186.93 445 710 162,142 444 365
Variability:1.082 0.2 0.2 0.2
Year Peak Month Average
(gal/day)
Peak Month Average
per ERD (gal/day)
Ratio of PD/ERC to
Peak Month Avg/ERC
2021 287,617 595 1.16
2020 314,603 1,356 0.93
2019 279,811 629 1.13
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
ST001 MAIN TANK 200,000
ST002 SECONDARY TANK 80,000
Storage Totals: 280,000 GAL
Source ID Source Name Flow Rate (GPM)
WS006 WELL #1 60
WS001 LOWER POND SPRING 44
WS004 OLD UKON SPRING 15
WS007 UTAH02070 BEAR RIVER WCD 100
WS010 UTAH02079 - BEAR RIVER WCD - COLLINSTON 100
Source Totals: 319 GPM