Module 4: WinSLAMM v 9.1 Control Practice Cost Analysis Arvind Narayanan Brown and Caldwell Atlanta, GA John Voorhees, PE, PH AECOM, Inc. Madison, WI We will cover... Running the model We will cover... Running the model Cost Analysis What Does the Cost Analysis Program Do? Calculates the cost of the control practices listed in a model run Allows you to compare the cost of different sets of practices Provides the option of applying either pre- determined costs or user-defined costs Doesn t evaluate the cost reductions due to the use of control practices, ie, no asphalt pavement reduction determined if porous pavement is used. The separate cost spreadsheet calculates the basic drainage system costs for comparison though. 1
Cost Analysis How are the Cost Values Normalized? Cost Analysis How are the Cost Values Normalized? A A A A A A 1 2 3 4 n A A A A A A 1 2 3 4 n P Total Present Worth = Capital Cost + Land Cost + Present Worth of Annual Maintenance Cost P Uniform Series Worth = Annual Value of (Capital Cost + Land Cost) + Annual Maintenance Cost Cost Analysis What is the General Cost Evaluation Process? Edit and Save the Cost Template.csv File Select the Cost Data File for a Model Run Run the Program Review the Cost We will cover... Running the model 2
Sources of Cost Data Sources of Cost Data Cost Index Value 12000 10000 8000 6000 4000 2000 Construction Cost Index by City Costs SEWRPC 1991 Cost Report Costs Updated Using ENR Cost Indices Cost Indices Available for 20 Cities Costs Costs Available for Wet Detention ti Porous Pavement Grass Swales Street Cleaning Catchbasins Infiltration Trenches Capital Cost in 1989 Dollars ($1000's) 1000 100 10 Wet Detention Pond Costs - SEWRPC 1989 Low Cost Med. Cost High Cost O&M Cost 0 1989 2005 Atlanta, GA Baltimore, MD Birmingham, AL Boston, MA Chicago, IL Cincinnati, OH Cleveland, OH Dallas, TX Denver, CO Detroit, MI Kansas City, MO Los Angeles, CA Minneapolis, MN New Orleans, LA New York, NY Philadelphia, PA Pittsburgh, PA San Francisco, CA Seattle, WA St.Louis, MO 1 10 100 1000 Wet Detention Basin Water Volume (1000 cf) Sources of Cost Data Costs for Each Practice Enter Items that Define the Practice Select Unit Enter Cost per Unit Enter Quantity Program Calculates Cost Program Determines Enter Routine Maintenance Cost We will cover... Running the model 3
On the Summary Data Page Enter project life and interest rate information Enter Land Costs Select Cost Index For Each Control Practice Select either or Costs For Costs, select Cost Range For Costs, enter Cost Data Enter Land Use Multiplier Re-name and Save Cost Data File From the Main Menu go to the Options/Access Cost Data Summary Tab... Summary Data Tab Summary Data Tab Interest Rate and Project Life Land Use Costs Control Practice Cost Tabs and Summary Data Tab Cost Index Selection Cost File Management 4
Wet Detention Pond Cost Data Wet Detention Pond Cost Data Capital Cost Range per 1000 cubic feet - Sediment Removal Costs Land Area Multiplier Porous Pavement Cost Data Porous Pavement Cost Data Capital Cost Range per square foot Land Area Multiplier 5
Street Cleaning Cost Data Street Cleaning Cost Data Capital Cost Range per curb mile Biofiltration Cost Data Biofiltration Cost Data Crushed Stone Fill Cost per cubic yard Land Area Multiplier 6
Cost Data Catchbasin Cleaning Cost Data Catchbasin Cleaning Cost Data Capital Cost Range per unit s Grass Swale Cost Data Grass Swale Cost Data per foot Land Area Multiplier 7
We will cover... Running the Model Two Types of Cost 1. Capital, Land, and Maintenance CostsontheSummaryTabofa on the of a WinSLAMM Model Run 2. Capital, Land, and Maintenance Costs included with the output when you run a set of.dat files using the Batch Processor 1. on a Model Run Summary Tab 1. on a Model Run Summary Tab Enter the Cost Data File Name in the Current File Data Window Total Control Practice Costs 8
2. from a Set of.dat Files 2. from a Set of.dat Files Import the output file DATSet.CSV into Excel Cost for each.dat file Enter the Cost Data File Name by checking the box and pressing the Select Cost Data File Window 2. from a Set of.dat Files Import the output file DATSetCostDetail.CSV into Excel Cost Information for each control practice 2. from a Set of.dat Files Import the output file DATSetCostDetail.CSV into Excel Additional Detention Pond Sediment and Biofilter Volume Information 9
2. from a Set of.dat Files Import the output file DATSetCostDetail.CSV into Excel Present Value and Annual Value Cost Information We covered... Running the model 10