DDW-2025-009580

System Number 20005
Number of residential connections - - - - - - - - - - -- - - - - - - - - - - - - - - - - - -1,200
Number of other connections - - - 62 ERCs of other connections 62.0
Total Equivalent Residential Connections (ERCs)1,262.0
gpd/ERC Total (gpm)Gallons/ERC Total (gallons)
800 701.1 400 504,800
1.2 Outdoor Water Use
Is the drinking water used for outdoor irrigation?
Residential ERCs using drinking water for irrigation 1200
Percentage of Residential ERCs using DW for irrigation 100%Map Zones
per residential connection - - - - - - - - -0.10 1
other connections (park, school, etc.)- - - - - - - - -0.20 2
Irrigation zone 3 3
4
5
6
gpd/ERC Total (gpm)Gallons/ERC Total (gallons)
488 407.5 253 303,866
1.3 Fire Flow Water Use
Does the water system provide fire protection?
flow demand (in gpm) for water system or pressure zone 1,000
duration (in hours) for water system or pressure zone 2
Required Fire Suppression Storage (in gallons) - - - - - - - - - - - - - - - - -120,000
2. Summary of Water System Capacity Requirements
gpd/ERC Total (gpm)Gallons/ERC Total (gallons)
1,288 1,108.6 653 928,666
2.1 Does this system have adequate source capacity (per R309-510-7)?
Required Source Capacity 1,108.6 gpm
Existing Source Capacity 2,950.0 gpm
Source Capacity Deficit None gpm
Existing % of Total Req'd 266.1%
Division of Drinking Water — Water System Capacity Calculation Sheet (Last Update 3/30/2017)
*Enter the green cells only*
equals to water use of 55 homes.)
MIN. REQUIREMENTS FOR IRRIGATION USE
System Name Manti City
(*Verify req'd fire flow and duration with local fire code officials.* Enter notes
here, e.g. fire official contact info or comments.)
(Enter notes here regarding whether and what %
of irrigation water is supplied by PWS.)
Source (indoor + outdoor)Storage (indoor + outdoor + fire)
This source capacity assessment is a general overall system calculation. It may not reflect the variations in individual areas or pressure zones.
Yes No
Yes No
Enter number of non-residential connections, e.g., 2 industrial connections.
Convert "Number of other connections" (Cell E9) to ERCs here. [ERCs of other connections = peak day demand of other connections in gal per day / 800 gpd]
Enter estimated irrigated acre
Enter total irrigated acres of other connections here.
Enter fire flow in gpm.
Enter duration in hours.
from the pick list. See "Irrigation Demands & Map" tab on the bottom of the
Less than 100% indicates: (1) additional source capacity is needed, and
Source deficit indicates that: (1) additional source capacity is needed,
Manti Cap. Calc. 2025 Page 1 of 2 10/13/2025
2.2 Does this system have adequate storage capacity (per R309-510-8)?
Total Required Storage 928,666 gal
Existing Storage Capacity 2,000,000 gal
Storage Capacity Deficit None gal
Required Fire Storage 120,000 gal
Not
Applicable
Existing % of Total Req'd 215.4%
3. Transient PWS Indoor Water Use — ERC Calcuation (See R309-510, Tables 510-1, 2, & 4 for other facility types.)
GPD/person*GPD/site or pad Gallons/person ERC/site or pad Total # of
sites/pads ERCs
60 0 30 0 0.00 0.0
20 0 10 0 0.00 0.0
5 0 2.5 0 0.00 0.0
N/A 100 N/A 50 0.13 0.0
Number of people per camp site
Source
(GPD/vehicle)
Storage
(Gal./vehicle)
ERC/1000
vehicles served
Vehicles
served/day ERCs
7 3.5 8.8 0.0
4. Data Input for Calculating ERCs, Source and Storage 4.2 Summary - Existing Sources (enter in green cells below)
Total Existing Source Capacity (in gpm)2,950
4.1 Projected ERCs Calculation (optional)WSo11 204 W 500 N WELL 1000
Total Projected ERCs 0 WS002 COLD SPRING 450
Existing Residential Connections 0 WS003 MIDDLE FORK SPRING 250
Obligated Future ERCs (enter below)0 WS004 SISTER SPRING 250
WS005 MILK CREEK SPRING 300
WS006 HOUGAARD SPRING 400
WS007 NORTH SLOPE SPRING 100
WS010 DEER TRAIL SPRING 200
Maximum ERCs (assuming indoor use only)5310
4.3 Summary - Existing Storage Tanks (enter below)
Total Existing Storage Cap. (in gallons)2,000,000
ST001 PRIMARY TANK 1,000,000
ST002 SECONDARY TANK 1,000,000
Notes" tab on the bottom of the screen.)
RV Park
Facility Type
Modern Recreation Camp
Storage
w/ flush toilets
Roadway Rest Stop w/ flushometer valves
Semi-Developed Camp w/o flush toilets
This storage capacity assessment is a general overall system calculation. It may not reflect the variations in individual areas or pressure zones.
Is storage deficiency solely
to fire storage?
Autolink to 4.3 "Total Existing Storage Capcity" cell below.
Storage deficit indicates that: (1) additional storage volume is needed, and (2) storage deficiency should be assessed.
Cell I8 ("Number of residential connections") on Page 1 to calculate PROJECTED demand & req'ts (including both existing & future connections).
pressure tanks shall NOT be considered effective storage volume for (1) community systems, or (2) NTNC with significant demand UNLESS an exception has been granted.
Autolink to 2 "Total Storage" cell above.
number in cell I8 or cell I9 on Page 1.
If NO, answer one of question set 2.01 to 2.05 in ESS.If YES, answer one of question set 2.06 to 2.10 in ESS.
Less than 100% indicates: (1) additional storage capacity is needed, and
Manti Cap. Calc. 2025 Page 2 of 2 10/13/2025