DDW-2024-012143

Irrigation Demands & Map
Notes
DDW Calculations
Does the water system provide fire protection?
System Name:
gpm
Zone
Peak Day
Avg Year
Storage
Demand
Reqmt
Peak
Total
Instantaneous
Water Rights
Storage
(gpm)
(ac-ft/yr)
(gallons)
Requirement
Total Water System Requirements
Source
zone
Difference:
gal
(gpm/irr. ac)
Avg. Yr.
(ac-ft/yr
per irr. ac.)
(gal/irr. ac)
IRRIGATION DEMANDS
(to be added to indoor and fire flow demands)
Is the drinking water used for outdoor irrigation?
- - - - - - - - -
- - - - - - - -
- - - > > >
(gpd/ERC)
MINIMUM REQUIREMENTS
Total irrigated acreage of other connections.
Maximum fire suppression demand for water system or pressure zone (gpm)
Maximum fire suppression duration for water system or pressure zone (hours)
Required Fire Suppression Storage (gallons)
Irrigation zone
(gallons/ERC)
Modern Recreation Camp
GPD/person
Semi-Developed Camp w/ flush toilets
Semi-Developed Camp w/o flush toilets
Roadway Rest Stop w/ flushometer valves
ERC/site
Facility
* Note 4 persons per site is assumed.
GPD/site *
vehicles
served
ERC/1000
(From Irrigation Zone Map)
Number of people per site*:
Division of Drinking Water Capacity Calculations

System Number:
Map Zones (used for pick list) Do not delete
Existing Sources:
Existing Storage:
Irrigation Demands & ERCs
(used in calculations on DDW Calculation sheet)
WS001
WS005
Total Source Capacity
ST001
ST002
ST003
ST004
ST005
(in gallons)
Total Storage Capacity
A Spring
B Well
(in gallons per minute)
South Tank
East Tank
West Tank
North Tank
Middle Tank
1. Indoor Water Use
2. Outdoor Water Use
3. Fire Flow Requirement
Does this system have adequate storage capacity per R309-510-8?
Required Source Capacity:
Required Storage Capacity:
Per ERC
Total Equivalent Residential Connections (ERCs)
IPS points may be assessed to a system that does not have adequate source capacity to meet peak day and/or average yearly flow requirements.
IPS points may be assessed to a system that does not have adequate storage capacity to meet average yearly flow requirements.
Does this system have adequate source capacity per R309-510-7?
ERCs of Non-Community Water Systems, Indoor Use (Per R309-510)
Sources
(Diaphragm or air pressure tank storage shall not be considered effective storage for community systems or NTNC with excessive demand.)
% of Req'd Capacity:
WS007
# of Sites
ERCs
# of Vehicles
ERCs
Existing ERCs
ERCs of other connections
Average irrigated acreage per residential connection
(Note: Verify minimum fire flow and duration with local fire authority.)
(Ex: 1 factory is equivalent to 50 homes.)
Total Projected ERC's
Equivalent Residential Connections
Obligated Future ERCs
Max. ERC allowed (indoor use only)
(= indoor use + outdoor use + fire flow demand)

Residential ERCs using drinking water for irrigation
Percentage of Residential ERCs using DW for irrigation
(GPD/vehicle)
(Note: Check whether and what % of outdoor irrigation is supplied by drinking water.)
Enter the green cells only.

Canyon Cove Homes
Home Run Subdivision
next town wholesale
Number of residential connections
Number of other connections - - - > > >
Notes
(Use this sheet to document calculations related to the DDW Calculation sheet, such as ERCs.)
System is a distribtion line and has no capacity
Muirhouse Homeowners Association
August 2003 - DDW Revision
Muirhouse Homeowners Association
18183.00
3.00
3.39
1.00
2.00
3.00
4.00
5.00
6.00
NO ZONE
1.66
1.00
2.00
3.00
4.00
5.00
6.00
NO ZONE
2528.00
1.00
2.00
3.00
4.00
5.00
6.00
NO ZONE
1.00
2.26
1.17
1782.00
4.52
2.00
2.80
1.23
1873.00
5.60
3.00
3.39
1.66
2528.00
6.78
4.00
3.96
1.87
2848.00
7.92
5.00
4.52
2.68

4081.00
9.04
6.00
4.90
3.26
4964.00
9.80
August 2003 - DDW Revision
Muirhouse Homeowners Association
18183.00
18183.00
1.00
280.00
2.00
0.00
0.00
3.00
4.00
280.00
5.00
6.00
800.00
155.56
24.00
60.00
400.00
112000.00
0.45
126.00
360.00
1.29
0.05
35.00
3.00
244.08
24.00
60.00
179.67
126.40
133984.00
0.08
87.98
1500.00
2.00
180000.00
60.00
1044.08
335.23
526.40
425984.00
0.53
213.98
560.00
335.23
1.67
224.77
520000.00
425984.00
1.22
94016.00

60.00
0.00
30.00
2.00
0.00
0.00
800.00
10.00
0.00
20.00
0.00
10.00
2.00
0.00
0.00
800.00
20.00
0.00
5.00
0.00
2.50
2.00
0.00
0.00
800.00
40.00
0.00
0.00
7.00
3.50
2.00
8.75
1000.00
800.00
2000.00
17.50
1000.00
Muirhouse Homeowners Association
280.00
260.00
100.00
48.00
200.00
30.00
18.00
560.00
1008.00
800.00
1440.00
120000.00
150000.00
80000.00
120000.00
50000.00
328.00
520000.00
This cell is automatically linked to "Existing ERCs" below.
Enter number of non-residential connections here, e.g., one factory.
You need to convert "Number of other connections" to ERCs here. (ERCs of other connection = peak day demand of other connections / 800 gal. per day)
Enter irrigated acre per residential lot here.

Enter total irrigated acres of other connections here.

Enter fire flow in gpm.
Enter duration in hours.
Calculated system requirements
Automatically linked to "Total Source Capacity" below
Enter Irrigated Zone # here (see "Irrigation Demands & Map" tab on the bottom of this screen).
Automatically linked to "Total Storage Capacity" below
Enter number of people per site if applicable
Negative number means (1) additional source is needed and (2) IPS points should be assessed.
Negative number means (1) additional volume is needed and (2) IPS points should be assessed.
For projected system demand (including existing & future connections), insert this number to Cell I9 above as "Number of residential connection."
Yes
No
Yes
No