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.