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79 However, Mr. Freihammer reviewed Alternate 2 that would involve a paved drain system 80 of permeable concrete blocks tied together and laid out in large sections. While the 81 finished product looks like individual pavers, Mr. Freihammer advised that with them 82 tied together as a block, they were more stable, and water flowed through the blocks to 83 the under-drain rocks and then into the lake. Mr. Freihammer noted that this system 84 provided a treatment for that water before it entered the lake. 85 86 Mr. Freihammer reviewed preliminary cost estimates at $310,000 and allocation of those 87 costs as follows: 88 • Ramsey-Washington Metro Watershed District = $ 50,000 grant 89 • City cost (from storm sewer utility funds) _ $195,000 90 • Residents (assessment for 25% of the cost) _ $ 65,000 91 92 Mr. Freihammer noted that the total project cost would include the typical 10% 93 contingency to cover unanticipated incidentals. At the usual 5% interest rate for special 94 assessments,recognizing that the assessments would be based on the actual construction 95 costs following completion of the project, Mr. Freihammer anticipated assessment costs 96 for each homeowner over the assessment term of 15 years to be approximately 97 $1,127.18/year. 98 99 Mr. Freihammer advised that the city had never assessed a project such as this to-date for 100 storm sewer improvements. Mr. Freihammer noted that preliminary costs suggested 101 those estimated total cost would be approximately $8,133/lot for the eight lots affected. 102 However, Mr. Freihammer noted that the final assessment amount would be based on 103 actual construction costs, and therefore may vary some. 104 105 Mr. Freihammer advised that the benefit would be that the storm water runoff would be 106 treated prior to entering the lake and captured for treatment through infiltration instead of 107 flowing overland directly into the lake. Also, Mr. Freihammer noted that by moving 108 from gravel driveways to a hard surface,property owners should experience easier 109 maintenance and snowplowing. 110 111 At the request of Member Cihacek, Mr. Freihammer advised that the city's current 112 assessment policy typically assesses homeowners at 25% of the total project costs for 113 improvement projects. 114 115 In 1995 storm sewer dollars, Mr. Culver noted that such an improvement would have 116 been approximately $3,000 to $4,000 rather than that estimated in today's costs. At the 117 request of Member Cihacek, Mr. Culver also confirmed that the project would be 118 contingent on receipt of grant funds and assessments from residents. Mr. Culver also 119 noted that if the project went forward, it would require a formal public hearing and 120 support by those residents before being authorized by the City Council, and if not, there 121 would be no project. 122 123 At the request of Member Lenz, Mr. Culver advised that the private road meant that the 124 maintenance and ownership of the roadway is the responsibility of the private property Page 3 of 7