DDW-2025-002013

Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards
Date Standard Effective: Mon Mar 03 10:13:51 MST 2025
Peak Day Source Demand per ERC (gal/day): 239
Average Annual Demand per ERC (gal/day): 31,102
Equalization Storage per ERC (gal/day): 85
SL COUNTY SERVICE AREA NO 3 - SNOWBIRD PWS ID: UTAH18031
Admin Name: KASEY DEAN CARPENTER
Address: PO BOX 920067
City, State, Zip: Snowbird, Utah 84092
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 5,110
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): 239
Average Annual Demand per ERC (gal/year): 31,102
Equalization Storage per ERC (gal): 85
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
239
31,102
85
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 85
Existing Storage (gal): 1,142,500
ERCs: 1,745
Required Storage w/o Fire Flow: 148,325
Required Fire Storage (gal): 180,000
Required Storage w/Fire (gal): 328,325
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 325,851 121,262,191.14 1,745 187 31,102 85 365
2022 368,211 128,799,124.77 1,916 192 29,779 81 365
2021 244,388 120,972,183.75 2,168 113 23,917 66 365
2020 553,946 150,116,297.19 2,317 239 24,403 67 366
2019 498,552 118,016,715.18 2,315 215 30,018 82 365
2018 417,089 162,107,613.99 3,077 136 24,259 66 365
Variability:0.763 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 227,048 130 1.44
2022 631,099 329 0.58
2021 1,470,954 678 0.17
2020 134,019 58 4.13
2019 240,431 104 2.07
2018 1,513,420 492 0.28
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
Peak Day Source Demand per ERC (gpm): 0.17
Existing Source Capacity (gpm): 466
ERCs: 1,745
Required Source Capacity (gpm): 296
Source Deficiency: 0
Source Deficiency (%): 0
No Source Deficiency
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
NF001 HIDDEN PEAK RAW WATER TANK-NORTH 2,500
NF002 HIDDEN PEAK RAW WATER TANK-SOUTH 2,500
NF003 TRAM TANK 1,500
ST001 SUPERIOR RESERVOIR 1,000,000
ST002 PERUVIAN RESERVOIR 120,000
ST005 HIDDEN PEAK STORAGE TANK 16,000
Storage Totals: 1,142,500 GAL
Source ID Source Name Flow Rate (GPM)
WS001 PERUVIAN MINE 33
WS002 HELLGATE MINE
WS003 WASATCH DRAIN TUNNEL 333
WS005 PERUVIAN SPRING 100
Source Totals: 466 GPM