DDW-2025-008105

System Number 05022
Number of residential connections - - - - - - - - - - -- - - - - - - - - - - - - - - - - - -8
Number of other connections - - - 8 ERCs of other connections 18.8
Total Equivalent Residential Connections (ERCs)26.8
gpd/ERC Total (gpm)Gallons/ERC Total (gallons)
800 14.9 400 10,720
1.2 Outdoor Water Use
Is the drinking water used for outdoor irrigation?
Residential ERCs using drinking water for irrigation 0
Percentage of Residential ERCs using DW for irrigation 0%Map Zones
per residential connection - - - - - - - - -0.00 1
Total irrigated acreage of other connections (park, school, etc.)0.00 2
Irrigation zone 3 3
4
5
6
gpd/ERC Total (gpm)Gallons/ERC Total (gallons)
0 0.0 0 0
1.3 Fire Flow Water Use
Does the water system provide fire protection?
Maximum fire flow demand (in gpm) for water system or pressure zone 0
duration (in hours) for water system or pressure zone 0
Required Fire Suppression Storage (in gallons) - - - - - - - - - - - - - - - - -0
2. Summary of Water System Capacity Requirements
gpd/ERC Total (gpm)Gallons/ERC Total (gallons)
800 14.9 400 10,720
2.1 Does this system have adequate source capacity (per R309-510-7)?
Required Source Capacity 14.9 gpm
Existing Source Capacity 200.0 gpm
Source Capacity Deficit None gpm
Existing % of Total Req'd 1343.3%
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 Lucerne Valley Campground
(*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,
Lucerne - 2025 Capacity Calcs Page 1 of 2 8/27/2025
2.2 Does this system have adequate storage capacity (per R309-510-8)?
Total Required Storage 10,720 gal
Existing Storage Capacity 60,000 gal
Storage Capacity Deficit None gal
Required Fire Storage 0 gal
Not
Applicable
Existing % of Total Req'd 559.7%
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 Gallon/site
or pad ERC/site or pad Total # of
sites/pads ERCs
60 240 30 120 0.30 0 0.0
20 80 10 40 0.10 188 18.8
5 20 2.5 10 0.03 0 0.0
N/A 100 N/A 50 0.13 0 0.0
Number of people per camp site 4
Source
(GPD/vehicle)
Storage
(Gal./vehicle)
ERC/1000
vehicles served
Vehicles
served/day ERCs
7 3.5 8.8 0 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)200
4.1 Projected ERCs Calculation (optional)WS001 well 120
Total Projected ERCs 47 WS002 well 80
Existing Residential Connections 0
Obligated Future ERCs (enter below)47
Maximum ERCs (assuming indoor use only)360
4.3 Summary - Existing Storage Tanks (enter below)
Total Existing Storage Cap. (in gallons)60,000
ST001 Storage Facility 10,000
ST002 Storage Facility 50,000
Notes" tab on the bottom of the screen.)
RV Park
Facility Type
Modern Recreation Camp
Semi-Developed Camp 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.
If applicable, enter number of people per camp site here.
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 (2) storage deficiency should be assessed.
Lucerne - 2025 Capacity Calcs Page 2 of 2 8/27/2025