SFPUC Wholesale Customer Water Demand Projections ... - BAWSCA

City of Burlingame Water Service Area 1
DSS Input Sheet
FINAL INPUT SHEET
Base Year Average Use and Indoor Percentages by Billing Category for DSS Model 2
Single Family
Multifamily
Commercial
Industrial
Institutional
Irrigation
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 300 65% 800 84% 850 97% 2400 82% 1100 61% 1200 0%
Data for DSS Model - - Base Year 2001
Estimated
Residential
City of Burlingame City of Burlingame Service Area
Census Population Estimated Population Population
Reconcile agency account billing data and census data
Number of Water Use Water Use,
Total Dwelling Units in Census 2000 for Burlingame
Category Accounts 2001 MGD Use Profile Water Use Indoor Water Use
FY. 2001 3 gpd/a 2 2001 Percent gcd gcd
Single Family 6,600 300 1.98 44.33% 108 70
Multifamily 1,138 800 0.91 20.39% 77 65
Service Area Billing Difference between
Commercial 713 850 0.61 13.58%
Accounts - Year 2000 billing and census
Industrial 257 2,400 0.62 13.78%
Single family
2000 Units
No. Buildings
3
data
Data Sources / Notes
Institutional 146 1,100 0.16 3.59% 1-detached 6,111 6,111
Irrigation 162 1,200 0.19 4.34% Subtotal 6,111 6,111 5,985 -127
0 0 0.00 0.00% Multi family
Housing Characteristics from U.S. Census Bureau
0 0 0.00 0.00% 1-attached 409 409
Total 9,016 4.47 100.00% 2-units 311 156
Total Water Purchased (produced) 4 = 4.63 MGD 3-4 units 672 192
Unaccounted For Water (UFW) 5 = 5% Percent From 5 year BAWUA Survey average 5 to 9 units 1,705 244
Estimated UFW for DSS Model = 7% Percent 7% if actual is < 7%, otherwise = E25 10-19 units 1,288 86
Water Produced for use in DSS Model 4.78 MGD Add UFW to Total Water Use 20 or more units 2,362 47
Meter for assumed 50 units per building
Peaking Factor NA Provided by Agency or SFPUC Water Master Plan (or NA) mobile homes 0 0
Meter for mobile home parks, assume 50 per park
Peaking Factor for DSS Model= 1.6 If NA use default value of 1.6. Subtotal 6,747 1,133 1,159 25
- Yellow cells are input to DSS Model MF Average = 6.0 units/building 5.8 units/account Units include all multi-family dwellings plus the "1-attached" dwellings.
NOTES Total SF + MF units = 12,858
1. - Communities served (includes all or portions of) City of Burlingame nearby unincorporated areas according to BAWUA survey
Population and Household Size in Census 2000 for Burlingame
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) and calculated from combined
categories
4 - Total water Purchased (produced) taken from BAWUA for Fiscal Year 2001-2002.
5 - Unaccounted for Water (UFW) is the percent difference between the total water purchased and the total water use.
6 - For reference see additional population estimates provided in population and employment estimates corresponding to service area table.
Data Sources / Notes
2000 2001 2001 Estimated growth from 2000 to 2001 (CA DOF Projections): 0.68%
Total Population from Census data 6 = 30,158 30364 Estimated employment growth from 2000 to 2001 (ABAG Employment Projections): 0.84%
Subtract Institutionalized Population = 428 431 Water use for the institutionalized population is accounted for in nonresidential billing categories
Residential Population = 29,730 29,933 Residential population shown corresponds to the city or cities represented by Census data
Avg. HHS 7 = 2.31
MF Pop @ MF HHS 7 = 1.70 11,470 11,548 11,769 38.6% Percent of Population that is MF
SF Pop = 18,260 18,385 18,385 61.4% Percent of Population that is SF
7 - Initial estimate based on census data for renter occupied units. For reference see table below that has 2000 census data for corresponding water
SF HHS 7 = 2.99
service area city or cities.
Total 30,154 100.0%
2000 Census Data 154 Difference in our estimate and average of 2000-2001 and 2001-2002 BAWUA Surveys
Average household size 2.21 -277 Difference in our estimate and the average 2000-2001 and 2001-2002 BAWUA Surveys including institutionalized population
Average household size of owner-occupied unit 2.58
Average household size of renter-occupied unit 1.87 Estimate Service Area Dwelling Units for 2001
Homeowner vacancy rate (percent) 0.40 SF Res 6,153 Equals No. Buildings from cell M21 plus growth in accounts for one year from cell T38
Rental vacancy rate (percent) 2.20 MF Res 6,629 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)
Population and Employment Estimates Corresponding to Service Area
Population
Employment
2000 Census data for jurisdiction 30,158 NA
2000 ABAG (jurisdictional) 28,158 28,580
2005 ABAG Projection (jurisdictional) 29,100 29,780
2000 ABAG (subregional) 29,354 28,580
Data Prepared : July 31, 2003 By: B. Skeens 2005 ABAG Projection (subregional) 30,300 29,780
Revised: September 5, 2003 2000 Department of Finance Benchmark 28,158 From State of California Department of Finance (DOF) table E-4 as of 4-1-2000. Website www.dof.ca.gov
2001 Department of Finance Estimate 28,350 From State of California Department of Finance table E-4 as of 1-1-2001. Website www.dof.ca.gov
2002 Department of Finance Estimate 28,300 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 30,000 NA
FY 2001-2002 BAWUA service area 30,000 NA
2001 Employment in Service Area (input to DSS Model) = 31,205 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.
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 DOF California Department of Finance