Community Assessment Report - Onsite Sewage Treatment ...

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STEP system costs were calculated as shown in Appendix F. The cost of the collection systemtakes into account tank abandonment and new tank costs.Costs assume ownership of the MSTS or LISTS cluster system by the Township and ownershipof ISTS by a private party. The MSTS alternative assumes mound dispersal areas consisting of10 foot wide pressurized beds with a rock dispersal area. MSTS costs including the pretreatmentfor nitrogen have reduced vertical separation requirements (i.e. shorter mounds), as the effluentwill be pretreated by the nitrogen removal technology. The LISTS alternative assumes Type 3mound treatment with three feet of sand in the mound. A detailed Hydrogeological <strong>Assessment</strong>at the proposed cluster site to determine if nitrogen removal technology will be required as partof the treatment system will be completed as part of project development. Costs for thisassessment are included within engineering cost estimates in Table 6. The cost of the MSTScluster system also takes into account constructing 1.5 times the amount of mound absorptionarea (i.e. making the mounds longer), as required by the year 2011 version of MN Rules Chapter7081.4.3 SUMMARY OF CAPITAL COSTSSections 4.1 – 4.2 highlight the cost estimates for each of the wastewater infrastructurealternatives. The cost estimates for each alternative assume the entire area would be served bythe alternative chosen. Table 7 is a side by side comparison of the average per unit capital costfor each of the alternatives.Table 7: Summary of Capital CostsAlternative 1ManagedISTSProgramAlternative 2LISTSCluster +ISTSAlternative 3MSTSClusterAlternative 3MSTS Clusterwith NitrogenRemovalTotal Assessed System Costs $ 251,300 $ 420,300 $ 612,400 $ 909,610Average Cost/Dwelling $ 18,000 $ 30,100 $ 43,800 $ 65,000Section 3.0 identifies the necessary components, advantages, and disadvantages of the threealternatives. While an ISTS program is the least expensive alternative on an average per unitT:\2797-01 Chisago County\CAR\ROLLINGS SHORES CAR 090712.docx4-4
asis, other considerations such as operational costs and limited flexibility of lots (i.e. a moundin a small yard takes up space that could be used for parking, gardening, building, etc.) must beconsidered as well.4.4 ANNUAL OPERATION AND MAINTENANCE COSTSWhen comparing costs for a wastewater infrastructure alternative, all costs, capital and annualoperation and maintenance (O&M) must be considered. Table 8 provides the average annualoperation and maintenance cost estimates for each alternative.Table 8: Annual Operation and Maintenance CostsAlternative1 ManagedISTSProgramAlternative3 LISTSCluster +ISTSAlternative2A MSTSClusterAlternative 2AMSTS Clusterwith NitrogenRemovalTotal All Properties $ 1,400 $ 3,100 $ 5,800 $ 22,700Residential Average Cost for AllProperties/Year $ 100 $ 230 $ 414 $ 1,621Residential Average Cost for AllProperties/Month $ 9.00 $ 20.00 $ 35.00 $ 136.00Residential Average Cost for ISTSProperties/Month $ 9.00 $ 9.00 - -Residential Average Cost for ClusterProperties/Month - $ 32.00 $ 35.00 $ 136.00Tank pumping costs were assumed at $0.17/gallon (i.e. $170/1000 gallons). Annual operationand maintenance costs for Alternative 1 over the complete estimated 25-year life span that wasused to create the table are as follows for a residential system:• Type 1: $100• Type 2: Bedrooms/home * 50 gallons/day/bedroom * 365 days/year * $170/pump event1000 gallon holding tank capacity• Type 3: $100Alternative 1 O & M costs assume that property #13 (Figure 5) will be allowed to build a Type 3Mound on the community-owned land across the road to the east. A typical Type 1 or 3 ISTST:\2797-01 Chisago County\CAR\ROLLINGS SHORES CAR 090712.docx4-5
Page 1: Rolling ShoresCommunityAssessment R
Page 4 and 5: 1.0 Introduction1.1 BACKGROUNDThe C
Page 7 and 8: 1.3 REPORT PURPOSEThis report is a
Page 9 and 10: 2.0 Existing Conditions2.1 INTRODUC
Page 11 and 12: 2.3 FINDINGSThe purpose of the site
Page 13 and 14: Photo 1: Wastewater effluent surfac
Page 15 and 16: 3.0 Alternatives Analysis3.1 INTROD
Page 17 and 18: 3.2.2 Private ISTS ProgramIn a priv
Page 19 and 20: ISTS rules dictate that systems tha
Page 21 and 22: with CAR ID#13 is allowed to build
Page 23 and 24: Table 4: Estimated Permitting Flow
Page 25 and 26: etained at all individual propertie
Page 27 and 28: • Lower operation and maintenance
Page 29 and 30: 4.0 Cost Comparison of Alternatives
Page 31: The replacement wastewater system A
Page 35 and 36: analysis over a 25-year period show
Page 37 and 38: 5.0 Summary and Recommendations5.1
Page 39 and 40: • Chisago County would continue t
Page 41 and 42: Project LocationRush Lake 7.5 Minut
Page 43 and 44: 920940920920920920940930920920920!A
Page 45: 13Note: CAR ID#13 will be a holding
Page 48 and 49: Appendix ABackground Information
Page 50 and 51: pores and channels. As a result the
Page 52 and 53: The trench is the most common of th
Page 54 and 55: DRAFT - 5/30/12Septic System Improv
Page 56 and 57: CAR ID#Property Information Drainfi
Page 58 and 59: 03.01358.15!>SB 1948.71503.01358.16
Page 60 and 61: !(03.01358.13!(!A!>SB 1939.30703.01
Page 62 and 63: !>!A03.01358.11!. !.03.01358.12!>SB
Page 64 and 65: 03.00047.1003.00047.00!(SUMP OUT925
Page 66 and 67: 03.01358.06!ACambridge Dr!>SB 1939.
Page 68 and 69: !A03.01358.04Cambridge Dr!A03.01358
Page 70 and 71: !(!>SB 1939.98903.01358.02!ASB 1940
Page 72 and 73: !>03.01358.18470th St!>SB 4935.649S
Page 75 and 76: Appendix DSoil Borings
Page 77 and 78: Date Completed:Completed By:Project
Page 83 and 84:
Date Completed:Completed By:Project
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Appendix EFlow Calculations
Page 101 and 102:
LISTS Final Permitting FlowWorkshee
Page 103 and 104:
MSTS Final Permitting FlowWorksheet
Page 105 and 106:
ESTIMATED LISTS CLUSTER CAPITAL COS
Page 107 and 108:
ESTIMATED CLUSTER MSTS CAPITAL COST
Page 109 and 110:
OPERATION AND MAINTENANCE FOR CLUST
Page 111 and 112:
Appendix GChisago County Letters
Page 113 and 114:
Compliance Inspection FormExisting
Page 115 and 116:
Property address: Cambridge Dr, Har
Page 117 and 118:
Easement and property research find
Page 119:
#210968• Signed June 27, 1988•
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