DDW-2025-004711

Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards
Date Standard Effective: Thu May 22 08:04:26 MDT 2025
Peak Day Source Demand per ERC (gal/day): 343
Average Annual Demand per ERC (gal/year): 16,235
Equalization Storage per ERC (gal): 103
MT HAVEN OWNERS ASSOCIATION PWS ID: UTAH18055
Admin Name: STEVE MCINTOSH
Address: Box 8124
City, State, Zip: Alta, UT 84092
Phone: [phone]
Email: [e-mail]
System Type: Transient Non-Community
Population: 85
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2022, 2023, 2024
Peak Day Source Demand per ERC (gal/day): 343
Average Annual Demand per ERC (gal/year): 16,235
Equalization Storage per ERC (gal): 103
x
x
x
(1 + 0.0)
(1 + 0.0)
(1 + 0.0)
=
=
=
343
16,235
103
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 103
Existing Storage (gal): 20,000
ERCs: 57
Required Storage w/o Fire Flow: 5,871
Required Fire Storage (gal): 0
Required Storage w/Fire (gal): 5,871
Storage Deficiency: 0
Storage Deficiency (%): 0.0
No Storage Deficiency
Peak Day Source Demand per ERC (gpm): 0.24
Existing Source Capacity (gpm): 19
ERCs: 57
Required Source Capacity (gpm): 14
Source Deficiency: 0
Source Deficiency (%): 0.0
No Source 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 13,034 671,253 56 233 11,987 76 158
2023 19,551 925,417 57 343 16,235 103 158
2022 13,034 873,281 56 233 15,536 98 158
Variability:0.018 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 9,985 178 1.31
2023 9,985 175 1.96
2022 53,548 956 0.24
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
ST001 MT HAVEN TANK #1 10,000
ST002 MT HAVEN TANK #2 10,000
Storage Totals: 20,000 GAL
Source ID Source Name Flow Rate (GPM)
WS001 MT. HAVEN SPRNG 19.86
Source Totals: 19 GPM