THE COST ESTIMATE
AERATION DIFFUSION SYSTEM:
COST ESTIMATE
The Capital Expenditure - $250,000 to $300,000
The Cost per Diffuser - $10,000
The aeration diffusion system chosen for this site has a 5 year warranty for system components, and a 30 year life expectancy.
Initial risk of an algae bloom when system first implemented, however the risk dissipates within the first 4-6 weeks of operation.
OPERATION AND MAINTENANCE
Yearly O&M Cost - $500 to $1000
Energy Demand - $31,000 per year
The Operation and Maintenance for this system involved daily monitoring of the system. This amounts to approximately 30 minutes of monitoring per day of the system. Daily O&M ensures optimum and uniform airflow across all diffusers.
REHABILITATION CHANNEL:
COST ESTIMATE
Excavation Cost - $347,501
Cost per Cubic Yard - $82 per CY
Materials Cost - $298,707
Total Capital Cost - $646,208
Listed above is the Capital Expenditures Cost Estimate for the Rehabilitation Channel.Â
The approximate amount of soil that will need to be excavated is 325 cubic yards.
OPERATION AND MAINTENANCE
Cost per Day of Coagulants - $83 per day
Flocculant Removal Cost - $520
Monthly O&M Cost - $3,537 per month
The Operation and Maintenance (O&M)Â for the rehabilitation channel is bi-weekly. The O&M consists of a bi-weekly removal and disposal of flocculated material.
FOCUSED DREDGING:
COST ESTIMATE
Dredging Cost - $116,782
Cost per Cubic Yard - $3.20
Material Disposal Cost - $918,300
Total Cost - $1,080,969
Initial dredging cost estimate take into account the cost of labor and equipment use. Labor taxes and insurances were taken from historical data and equipment based on availability and our project size.
Approximate soil volume to be dredged and remediated is 36,730 cubic yards.
Volume of water to be treated estimated at 345 acre-ft.
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Note: There is no cost estimate required for the Operations and Maintenance for Focused Dredging, as this is a one-time occurrence.
