New Town Center Common Impacts



Report Contents
Analysis Description
Report Summary
Scenarios in this Report
Common Impacts Parameters
Assumptions
Indicator Values
Potentially Useful References



click icon to open or close this sectionAnalysis Description
An analysis of alternative mixed-use development plans for a large site.

click icon to open or close this sectionReport Summary
Report Date/Time:  Tuesday, July 15, 2014 10:54 AM

click icon to open or close this sectionScenarios in this Report
Alternative A
Alternative B


click icon to open or close this sectionCommon Impacts Parameters
Standard Parameters
Buildings Layer Buildings
Dwelling Units per Building (Attribute: Buildings) Dwelling Units
Commercial Floor Area per Building (Attribute: Buildings) Floor Area
Commercial Floor Area Units square feet


click icon to open or close this sectionIndicators
click icon to open or close this sectionIndicators
Indicator Alternative A Alternative B Units
Common Impacts - Annual CO Auto Emissions 3,699,792 4,953,810 lbs
Common Impacts - Annual CO2 Auto Emissions 34,673 46,425 tons
Common Impacts - Annual Hydrocarbon Auto Emissions 467,324 625,720 lbs
Common Impacts - Annual NOx Auto Emissions 231,955 310,574 lbs
Common Impacts - Commercial Energy Use 998,725 106,470 million btu / year
Common Impacts - Commercial Floor Area 10,975,000 1,170,000 sq feet
Common Impacts - Commercial Jobs 13,335 1,422 commercial jobs
Common Impacts - Commercial Jobs to Housing Ratio 3.51 0.28 commercial jobs / dwelling unit
Common Impacts - Labor Force 7,475 10,008 workers
Common Impacts - Population 19,015 25,460 persons
Common Impacts - Residential Dwelling Units 3,803 5,092 dwelling units
Common Impacts - Residential Energy Use 452,557 468,464 million btu / year
Common Impacts - Residential Water Use 543 727 gallon / household / day
Common Impacts - School Children 3,594 4,812 school children
Common Impacts - Vehicle Trips per Day 22,628 30,297 vehicle trips / day
click icon to open or close this sectionDetails
Indicator Details
Common Impacts - Annual CO Auto EmissionsUnits: lbs
Formula:
If( [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] = 0, Then ( 0 ), Else( ( ( ( [ Assumption:CI Assumption - Average Vehicle Trip Length ] / [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] ) * [ Assumption:CI Assumption - Auto Emissions - CO ] ) / 453.6 ) * 365 * [ Indicator:Common Impacts - Vehicle Trips per Day ] ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Annual CO2 Auto EmissionsUnits: tons
Formula:
If( [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] = 0, Then ( 0 ), Else( ( ( ( [ Assumption:CI Assumption - Average Vehicle Trip Length ] / [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] ) * [ Assumption:CI Assumption - Auto Emissions - CO2 ] ) / 2000 ) * 365 * [ Indicator:Common Impacts - Vehicle Trips per Day ] ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Annual Hydrocarbon Auto EmissionsUnits: lbs
Formula:
If( [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] = 0, Then ( 0 ), Else( ( ( ( [ Assumption:CI Assumption - Average Vehicle Trip Length ] / [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] ) * [ Assumption:CI Assumption - Auto Emissions - Hydrocarbons ] ) / 453.6 ) * 365 * [ Indicator:Common Impacts - Vehicle Trips per Day ] ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Annual NOx Auto EmissionsUnits: lbs
Formula:
If( [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] = 0, Then ( 0 ), Else( ( ( ( [ Assumption:CI Assumption - Average Vehicle Trip Length ] / [ Assumption:CI Assumption - Passenger Car Fuel Efficiency ] ) * [ Assumption:CI Assumption - Auto Emissions - NOx ] ) / 453.6 ) * 365 * [ Indicator:Common Impacts - Vehicle Trips per Day ] ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Commercial Energy UseUnits: million btu / year
Formula:
( ( [ Assumption:CI Assumption - Annual Commercial Energy Use ] * Sum( [ Attribute:Buildings:Floor Area ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) ) ) / 1000 )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Commercial Floor AreaUnits: sq feet
Formula:
Sum( [ Attribute:Buildings:Floor Area ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Commercial JobsUnits: commercial jobs
Formula:
If( [ Assumption:CI Assumption - Floor Area per Employee ] = 0, Then ( 0 ), Else ( Sum( [ Attribute:Buildings:Floor Area ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) ) / [ Assumption:CI Assumption - Floor Area per Employee ] ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Commercial Jobs to Housing RatioUnits: commercial jobs / dwelling unit
Formula:
If( [ Indicator:Common Impacts - Residential Dwelling Units ] = 0, Then ( 0 ), Else ( [ Indicator:Common Impacts - Commercial Jobs ] / [ Indicator:Common Impacts - Residential Dwelling Units ] ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Labor ForceUnits: workers
Formula:
( [ Assumption:CI Assumption - Percent Employed ] * [ Indicator:Common Impacts - Population ] ) / 100

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - PopulationUnits: persons
Formula:
[ Assumption:CI Assumption - Persons per Household ] * Sum( [ Attribute:Buildings:Dwelling Units ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Residential Dwelling UnitsUnits: dwelling units
Formula:
Sum( [ Attribute:Buildings:Dwelling Units ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Residential Energy UseUnits: million btu / year
Formula:
[ Assumption:CI Assumption - Annual Household Energy Use ] * Sum( [ Attribute:Buildings:Dwelling Units ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Residential Water UseUnits: gallon / household / day
Formula:
( [ Assumption:CI Assumption - Daily Household Water Use ] * 365 * Sum ( [ Attribute:Buildings:Dwelling Units ], Where ( [ Attribute:Buildings:TS_BUILT ] = 1 ) ) ) / 1000000

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - School ChildrenUnits: school children
Formula:
( [ Assumption:CI Assumption - Percent School Children ] * [ Indicator:Common Impacts - Population ] ) / 100

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
Common Impacts - Vehicle Trips per DayUnits: vehicle trips / day
Formula:
[ Assumption:CI Assumption - Household Vehicle Trips per Day ] * Sum( [ Attribute:Buildings:Dwelling Units ], Where( [ Attribute:Buildings:TS_BUILT ] = 1 ) )

' NOTE: this formula is linked to the current TimeScope Built Status for the layer, 'Buildings'

' This formula was automatically created by the Common Impacts Wizard to describe impacts associated with the layer 'Buildings'.
click icon to open or close this sectionIndicator Descriptions
Indicator Description
Common Impacts - Annual CO Auto Emissions Total carbon monoxide emissions generated by vehicles associated with residential buildings in the Common Impacts buildings layer. See Help for details and disclaimer.
Common Impacts - Annual CO2 Auto Emissions Total carbon dioxide emissions generated by vehicles associated with residential buildings in the Common Impacts buildings layer. See Help for details and disclaimer.
Common Impacts - Annual Hydrocarbon Auto Emissions Total hydrocarbon emissions generated by vehicles associated with residential buildings in the Common Impacts buildings layer. See Help for details and disclaimer.
Common Impacts - Annual NOx Auto Emissions Total emissions of oxides of nitrogen generated by vehicles associated with residential buildings in the Common Impacts buildings layer. See Help for details and disclaimer.
Common Impacts - Commercial Energy Use Total annual energy used by commercial buildings in the Common Impacts buildings layer for all applications, including electricity and heating. See Help for details and disclaimer.
Common Impacts - Commercial Floor Area Total commercial floor area in the Common Impacts buildings layer.
Common Impacts - Commercial Jobs Total jobs associated with commercial floor space in the Common Impacts buildings layer. See Help for details and disclaimer.
Common Impacts - Commercial Jobs to Housing Ratio Common Impacts Commercial Jobs divided by Common Impacts Residential Dwelling Units. See Help for details and disclaimer.
Common Impacts - Labor Force Total number of jobholders living in the dwelling units in the Common Impacts building layer. See Help for details and disclaimer.
Common Impacts - Population Total number of people living in the dwelling units in the Common Impacts building layer. See Help for details and disclaimer.
Common Impacts - Residential Dwelling Units Total number of residential dwelling units in the Common Impacts building layer.
Common Impacts - Residential Energy Use Total annual energy used by residential buildings for all applications, including electricity and heating. See Help for details and disclaimer.
Common Impacts - Residential Water Use Total annual water use by dwelling units in the Common Impacts building layer for all indoor and outdoor applications. See Help for details and disclaimer.
Common Impacts - School Children Total number of school children living in the dwelling units in the buildings layer. See Help for details and disclaimer.
Common Impacts - Vehicle Trips per Day Total number of motorized trips taken each day, on average, by residential households (dwelling units) in the Common Impacts buildings layer. See Help for details and disclaimer.


click icon to open or close this sectionAssumptions
click icon to open or close this sectionAssumptions
Assumption Default Alternative A Alternative B Units
CI Assumption - Annual Commercial Energy Use 91.0 91.0 91.0 thousand btu / sq foot
CI Assumption - Annual Household Energy Use 92.2 119 92 million btu / household / year
CI Assumption - Auto Emissions - CO 476.76 476.76 476.76 grams / gallon
CI Assumption - Auto Emissions - CO2 19.70 19.70 19.70 lbs / gallon
CI Assumption - Auto Emissions - Hydrocarbons 60.22 60.22 60.22 grams / gallon
CI Assumption - Auto Emissions - NOx 29.89 29.89 29.89 grams / gallon
CI Assumption - Average Vehicle Trip Length 9.76 9.76 9.76 miles
CI Assumption - Daily Household Water Use 391 391 391 gallons / household / day
CI Assumption - Floor Area per Employee 823 823 823 square feet / employee
CI Assumption - Household Vehicle Trips per Day 5.95 5.95 5.95 household vehicle trips / day
CI Assumption - Passenger Car Fuel Efficiency 22.9 22.9 22.9 miles / gallon
CI Assumption - Percent Employed 39.31 39.31 39.31 percent of population
CI Assumption - Percent School Children 18.9 18.9 18.9 percent of population
CI Assumption - Persons per Household 2.54 5.00 5.00 persons / household
click icon to open or close this sectionAssumption Descriptions
Assumption Description
CI Assumption - Annual Commercial Energy Use Average annual energy used by each commercial building for all applications, including electricity and heating. Default value is from "Commercial Buildings Energy Consumption Survey (2003)," Table C1A, Energy Information Administration, Office of Energy Markets and End Use.
CI Assumption - Annual Household Energy Use Average annual energy used by each residential building for all applications excluding primary electricity and wood. Default value is from "Residential Energy Consumption Survey (2001)," Energy Information Administration.
CI Assumption - Auto Emissions - CO Carbon monoxide emissions generated by vehicles associated with each dwelling unit. Default value is from "Figures for average annual emissions and fuel consumption for passenger cars and light trucks (July, 2000)," US Environmental Protection Agency.
CI Assumption - Auto Emissions - CO2 Carbon dioxide emissions generated by vehicles associated with each dwelling unit. Default value is from "Figures for average annual emissions and fuel consumption for passenger cars and light trucks (July, 2000)," US Environmental Protection Agency.
CI Assumption - Auto Emissions - Hydrocarbons Hydrocarbon emissions generated by vehicles associated with each dwelling unit. Default value is from "Figures for average annual emissions and fuel consumption for passenger cars and light trucks (July, 2000)," US Environmental Protection Agency.
CI Assumption - Auto Emissions - NOx Emissions of oxides of nitrogen generated by vehicles associated with each dwelling unit. Default value is from "Figures for average annual emissions and fuel consumption for passenger cars and light trucks (July, 2000)," US Environmental Protection Agency.
CI Assumption - Average Vehicle Trip Length Average length of trip for vehicles associated with the dwelling units. Default value is from the US Bureau of Transportation Statistics (2006).
CI Assumption - Daily Household Water Use Average daily water use by each dwelling unit for all indoor and outdoor applications. Default value is from "Estimated Use of Water in the United States in 2000," (Revised February, 2005) USGS Circular 1268, United States Geological Survey.
CI Assumption - Floor Area per Employee Average amount of commercial floor area that equates to one job. Default value is from "Commercial Buildings Energy Consumption Survey (1999)," Energy Information Administration.
CI Assumption - Household Vehicle Trips per Day Number of motorized trips taken by residential households each day, on average. Default value is from Transportation Energy Data Book (2005), chapter 8, edition 26, US Department of Energy, Energy Efficiency and Renewable Energy.
CI Assumption - Passenger Car Fuel Efficiency Average fuel efficiency of cars used by residents. Default value is from the US Bureau of Transportation Statistics (2005).
CI Assumption - Percent Employed Number of jobholders living in the dwelling units in the buildings layer, represented as a percent of total population. Default value is from "Private nonfarm employment (2005)," U.S. Census Bureau, 2000 Census of Population, State and County Quick Facts.
CI Assumption - Percent School Children Number of school children living in the dwelling units in the buildings layer, represented as a percent of total population. Default value is from "USA Population by Age (2000)," U.S. Census Bureau, 2000 Census of Population, Profiles of General Demographic Characteristics.
CI Assumption - Persons per Household Number of people living the dwelling units of the building layer. Default value is from "American Housing Survey of the United States (2005)," Table 2-9 U.S. Census Bureau


click icon to open or close this sectionPotentially Useful References
Assumption Source


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