Issues
|
Cost
Comparision of LOCSD Sewer & CASE Alternative
(data gathering in process) |
|||
|
Cost
Component
|
LOCSD
Sewer
|
CASE
Alternative
(*see important assumptions below) |
Difference
|
| Capital cost (does not include onsite costs) |
$84
million
|
$40
million
|
$44
million
|
| Onsite
costs ( 4,774 sewer hook ups and septic decommissions) |
$4,200
per hh (total of $20 milion)
|
no
upfront costs to homeowners
(see below) |
$4,200
per hh (totaling $20 milion)
|
| Equity cost |
|
|
|
| Monthly cost |
|
|
|
| Annual cost | |||
* Cost Breakdown of CASE Alternative and Assumptions
Important Assumptions - The preliminary design of the alternative is just that - preliminary. Further, several cost components (noted below) are still under investigation. Consequently, we have inflated the estimated capital costs of $17.4M ($14M for treatment plant and $3.4M for disposal and reclamation) by over 100 percent to arrive at a total estimated capital cost of $40M.
Note however that effluent sewer projects in other communities have typically cost 50% than traditional gravity sewers like that proposed by LOCSD. See for example, Effluent Sewer Costs PDF by Orenco.Collection costs - We have also assumed that a $19 million low interest loan from the State would cover the homeowner onsite costs, estimated to be $4,000 for each of the 4,774 houses located in the Prohibition Zone.
Wastewater Treatment Facility - Capital costs for such facilities are calculated from the price per gallon treated with average costs running approximately $7 to $12 per gallon. Assuming a facility with a 1.4 million gallon per day (GPD) capacity and selecting the mid-point of this cost range ($10/gallon), total capital costs are estimated at $14 million. Note that this estimate does not include normal operation and maintenance costs (such costs depend on prevailing wage rates) nor does it include costs for reverse omosis.
Disposal and reclamation costs - This component of the project is primarily driven by cost of the "purple pipes," mandated by law. We have assumed approximately 200,000 feet of pipe at $7 - $12 per foot is needed for disposal along with an additional 100,000 feet of pipe at $10 per foot for water reclamation activities. Assuming the upper-end of the range for piping (i.e., $12/foot), the estimated cost for disposal and reclamation is thus approximately $3.4 million. Note this estimate does not include the cost of required air release valves with carbon filters.
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