05-12-1976 Council Agenda - Laserfiche WebLink

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April 29, 1976 Mr. Joseph Chlebek City Clerk City of Little Canada 515 East Little Canada Road Little Canada, Minnesota 55117 Dear Mr. Chlebek: This letter is written to furnish you with a summary of the 1975 Final Cost Allocation for your community based on actual Commission expendi- tures and your sewage flow volume for the year. This letter gives us the opportunity to provide information to you on our financial report for 1975 and the actual sewage flow volume for the entire :Metropolitan Disposal System as well as for your community. A copy of the 1975 Final Cost Allocation, 1975 Financial Report and 1975 sewage flow determina- tions are provided to show the data used in the cost allocation program. We are enclosing reports =2 through #5 from our cost allocation pro- gram which show the relationship of cost and sewage flow data for all cormunities using the Metropolitan Disposal System. The distribution of actual costs for each community in the 1975 Final Cost Allocation differs from those costs for which payments were made based on data in the 1975 Estimated Cost Allocation. We wart to explain the reasons for these differences in this letter. The principal reason for the changes in the final and estimated cost allocation is the difference in actual and estimated sewage flow volume. The estimated sewage flow for 1975 (done in mid 1974) was based on past sewage flow volume records and population projections. The estimated sewage flow volume was determined to be 92,699 million gallons ("1G) for the entire Metropolitan Disposal System. The actual total sewage flow based on the sum of the metered and unmetered flow was 93,979 MG. While this 1.4% total increase perhaps is not large on a metropolitan basis, there are some communities that have much larger percent flow increases on an individual basis. Many of these larger percent community flow increases were a direct result from contribution of infiltration /inflow to the sewer system during the extreme wet weather period of the second quarter of 1975. In fact, the total Metropolitan Disposal System sew- age flow increased about 7.8% from that determined in 1974 which was a relatively dry year. This condition of increased flow resulting from considerable infiltration /inflow into your sanitary sewer system was reported to you in a letter last fall. In this letter, we described the impact that these excessive sewage flow volumes have in the opera- tion of our system as well as on your system. We assume you may have identified and corrected some of these excess flow problems since that date. 350 METRO C :WARE BLDG. r *R & RO3GR1!TR•EET! i Ri 1T PAUL M`I 55'0! hit 222-S422i