Community Assessment Report - Onsite Sewage Treatment ...

4.0 Cost Comparison of AlternativesThree wastewater infrastructure alternatives have been identified within the scope of this report.Side by side comparisons of capital and operation and maintenance costs have been provided foreach alternative. This section gives cost comparisons, starting with capital costs, and ending witha present worth analysis for 25 years.4.1 INDIVIDUAL SEWAGE TREATMENT SYSTEMS (ALTERNATIVE 1)Table 5 reflects the average cost estimates to replace/upgrade each property with an ISTS ownedand operated by the individual homeowner.Table 5: 25 Year Capital Cost Estimates Private ISTS ProgramCAR Likely ComplianceStatus of Current ISTSISTSTreatmentSystemContingencyLegal,Eng.,AdminTotal CostEstimateAvg. Cost/ResidentialConnectionAll Parcels $ 207,500 $ 20,800 $ 23,000 $ 251,300 $ 18,000This analysis of ISTS is an average over the entire CAR Area. Individual parcel costs for ISTSupgrades would vary by parcel. Each property can locate their estimated cost in Appendix B. Thetable has been created to allow for side by side comparisons with the other alternatives in thepresent worth analysis. Capital costs by system type that were used to create the table are asfollows for a residential system (cost estimates for Type 1-3 systems based on Wenckexperience):• Type 1 Mound: $7-$12K plus tank upgrade costs ($3,800-$6,500)• Type 2: $3,800-$6,500 (new tank)• Type 3: $11-$16K plus tank upgrade costs ($3,800-$6,500)T:\2797-01 Chisago County\CAR\ROLLINGS SHORES CAR 090712.docx4-1