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Cven 451: Solid Waste. Shane Wright, Danielle Gregory, Chet Manning, Hector Alanis. Demand. Production 10,000 person development Each person produces 5 pounds of waste per day This means 350,000 pounds of trash per week Each truck can handle 18,750 pounds per load and 5 loads per day - PowerPoint PPT Presentation
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CVEN 451: SOLID WASTE
Shane Wright, Danielle Gregory, Chet Manning, Hector Alanis
DEMAND• Production 10,000 person developmentEach person produces 5 pounds of waste per dayThis means 350,000 pounds of trash per weekEach truck can handle 18,750 pounds per load and 5 loads per dayOnly two trucks needed• Landfill Capacity12 yearCapable of holding roughly 265,000 CY of solid waste
20 yearCapable of holding 430,000 CY of solid waste
COST ANALYSISOption 1 – 20 Year Lifespan
Operating Cost 20-Year
Truck Driver $30,000
Equipment $42,000
Facility Manager $60,000
Truck Maintenance $10,000
Gas $12,000
Total $154,000
Capital Cost 20-YearLiner (clay, and plastic) $250,000Bulldozer $70,000Trash Compactor $85,000Truck $250,000Dirt Work ($5/yd^3) $1,000,000Paved Area $200,000Filter Fabric $6,000Leachate System $100,000 Total $2,211,000
Landfill budget includes: Infrastructure Construction Gas Maintenance Employee wages
COST ANALYSISOption 2 – 12 Year Lifespan
Differences between 12-Year and 20-Year Lifespans include: Construction Costs Total Liner Filter Fabric Total number of landfill closures and openings
Operating Cost 12-Year
Truck Driver $30,000
Equipment $42,000
Facility Manager $60,000
Truck Maintenance $10,000
Gas $12,000
Total $154,000
Capital Cost 12-YearLiner (clay, and plastic) $132,600Bulldozer $70,000Trash Compactor $85,000Truck $250,000Dirt Work ($5/yd^3) $665,000Paved Area $200,000Filter Fabric $3,300Leachate System $100,000 Total $1,755,900
Discounted Cash Flow Analysis
Assumptions Interest rate of 7% Lifespan, and capital and operating costs shown
above Yearly income of $288,000 found using current
Brazos Valley tipping fees of $30/ton 60 year analysis
Option 1 (20 years) is $100,000 cheaper than Option 2 (12 years)
Grants and Bonds
How to Pay Cost of Landfill:
$157 per household in entire city $1,480 per household in neighborhood
Grants Covers 50-100% of the leachate system cost
Bonds 7% interest, 10 Years Total Capital Cost: $3.7 Million Potential Bonds
Performance bond General Revenue Bonds
Landfill Location
Landfill Location
20 yr. Landfill Design
•Will meet TCEQ requirements
•430,000 cy volume, 5 acre Footprint •25 ft deep and 25 feet above grade
•125’ buffer zone around landfill
•Will utilize a 1600 sq ft work area and compact a 3ft depth of trash 6” cover over compacted trash
•Work area will be able to process 177,000 lbs of trash
•Waiting and truck inspection area at landfill entrance
20 yr. Landfill Design
Other Alternatives
Go With 12 year landfill design, cheaper upfront cost, higher long term cost
Coordinate with the City of College Station to make use of the Twin City Landfill.
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