SFPUC Wholesale Customer Water Demand Projections ... - BAWSCA

Mid Peninsula (Belmont) Water Service Area 1
DSS Input Sheet
FINAL INPUT SHEET
Base Year Average Use and Indoor Percentages by Billing Category for DSS Model 2
Residential
Apartments
Commercial
Industrial
Other Public Authority
Year Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor
2001 280 60% 2650 90% 1050 73% 4175 86% 2260 37%
Monthly as of Jan 2001 Monthly as of Jan 2001 Other is City, State, or County accounts
Data for DSS Model - - Base Year 2001
Number of Water Use Water Use,
Total Dwelling Units in Census 2000 for Belmont and SAN CARLOS
Category Accounts 2001 MGD Use Profile Water Use Indoor Water Use
FY. 2001 3 gpd/a 2 2001 Percent gcd gcd
Residential 7,010 280 1.96 57.56% 106 64
Apartments 206 2,650 0.55 16.01% 69 61
Commercial 466 1,050 0.49 14.35%
Industrial 50 4,175 0.21 6.12%
Single family
2000 Units
No. Buildings
Other Public Authori 90 2,260 0.20 5.96% 1-detached 6,577 6,577
0 0 0.00 0.00% 1-attached 612 612
Reconcile agency account billing data and census data
Service Area Billing
Accounts - Year 2000
3
Difference between
billing and census
data
0 0 0.00 0.00% Subtotal 7,190 7,190 7,015 -175
0 0 0.00 0.00% Multi family
Total 7,822 3.41 100.00% 2-units 113 57
Total Water Purchased (produced) 4 = 3.54 MGD 3-4 units 178 51
Unaccounted For Water (UFW) 5 = 3.1% Percent From 5 year BAWUA Survey average 5 to 9 units 557 80
Estimated UFW for DSS Model = 7% Percent 7% if actual is < 7%, otherwise = E25 10-19 units 1,207 80
Water Produced for use in DSS Model 3.65 MGD Add UFW to Total Water Use 20 or more units 1,903 38
Peaking Factor 1.95 Provided by Agency or SFPUC Water Master Plan (or NA) mobile homes 0 0
Peaking Factor for DSS Model= 1.95 If NA use default value of 1.6. Subtotal 3,958 306 205 -101
MF Average = 12.95 units/building 19
- Blue cells are entered by modeler
- Yellow cells are input to DSS Model Total SF + MF units = 11,148
Housing Characteristics from U.S. Census Bureau
Meter for assumed 50 units per building
Meter for mobile home parks, assume 50 per park
Must be more than one building on an MF meter.
Data Sources / Notes
NOTES
1. - Communities served (includes all or portions of) Belmont, San Carlos, and nearby unincorporated areas according to BAWUA survey. Serve 152
customers in San Carlos.
2 - Average gpd/a is based on a 12-month moving average through December 2001. Indoor use is based on average of 2 lowest consecutive months in the
winter if meters read bimonthly, or single lowest month if meters read monthly.
3 - Number of accounts is from data provided by water agency for this project (see worksheet with account data in this file)
Population and Household Size in Census 2000 for Belmont and SAN CARLOS
Estimated
City of Belmont City of Belmont Service Area
Census Population Estimated Population Population
Data Sources / Notes
2000 2001 2001 Estimated growth from 2000 to 2001 (CA DOF Projections): 0.59%
Total Population from Census data 6 = 26,400 26557 Estimated employment growth from 2000 to 2001 (ABAG Employment Projections): 1.45%
Subtract Institutionalized Population = 104 105 Water use for the institutionalized population is accounted for in nonresidential billing categories
4 - Total water Purchased (produced) taken from BAWUA for Fiscal Year 2001-2002 or agency if provided. Water purchase data was provided by Mid
Residential Population = 26,296 26,452 Residential population shown corresponds to the city or cities represented by Census data
Peninsula agency and is provided in this file.
Avg. HHS 7 = 2.36
5 - Unaccounted for Water (UFW) is the percent difference between the total water purchased and the total water use.
MF Pop @ MF HHS 7 = 2.00 7,916 7,963 7,955 30.1% Percent of Population that is MF
SF Pop = 18,380 18,489 18,489 69.9% Percent of Population that is SF
6 - For reference see additional population estimates provided in population and employment estimates corresponding to service area table.
SF HHS 7 = 2.56
Total 26,443 100.0%
7 - Initial estimate based on census data for renter occupied units. For reference see table below that has 2000 census data for corresponding water service
393 Difference in our estimate and average of 2000-2001 and 2001-2002 BAWUA Surveys
area city or cities.
288 Difference in our estimate and the average 2000-2001 and 2001-2002 BAWUA Surveys including institutionalized population
2000 Census Data
Average household size 2.35 Estimate Service Area Dwelling Units for 2001
Average household size of owner-occupied unit 2.59 SF Res 7,232 Equals No. Buildings from cell M21 plus growth in accounts for one year from cell T38
Average household size of renter-occupied unit 1.99 MF Res 3,977 Equals billing accounts in 2001 from cell C16 times average units per account in cell N30 (or average units per building in cell L30 to minimize population difference in cell N47)
Homeowner vacancy rate (percent) 0.30
Rental vacancy rate (percent) 1.00 Population and Employment Estimates Corresponding to Service Area
Population
Employment
8 -(INSERT ADDITIONAL ASSUMPTIONS FOR THIS SERVICE AREA)
2000 Census data for jurisdiction 26,400 NA
2000 ABAG (jurisdictional) 25,810 14,361
2005 ABAG Projection (jurisdictional) 26,402 15,403
2000 ABAG (subregional) 25,990 14,768
2005 ABAG Projection (subregional) 26,619 15,810
2000 Department of Finance Benchmark 26,400 From State of California Department of Finance (DOF) table E-4 as of 4-1-2000. Website www.dof.ca.gov
Data Prepared : July 21, 2003 By: M. Maddaus 2001 Department of Finance Estimate 26,557 From State of California Department of Finance table E-4 as of 1-1-2001. Website www.dof.ca.gov
Revised: September 5, 2003 2002 Department of Finance Estimate 26,461 From State of California Department of Finance table E-4 as of 1-1-2002. Website www.dof.ca.gov
FY 2000-2001 BAWUA service area 26,050 NA
FY 2001-2002 BAWUA service area 26,050 NA
2001 Employment in Service Area (input to DSS Model) = 14,705 Service Area Employment is determined by the ratio of the 2000-2001 BAWUA service area population to the
2000 ABAG Subregional Population and escalated to 2001 using the assumed growth rate in cell T39. (EXPLAIN SOURCE)
Definitions / Abbreviations
ABAG Association of Bay Area Governments MF multi family
BAWUA Bay Area Water Users Association MGD million gallons per day
DSS Decision Support System Model No. number
du dwelling unit Pop population
FY Fiscal Year Res residential
gpd/a gallons per day / per account SF single family
gpd gallons per day UFW unaccounted for water
HHS
household size