01-15-1980 Council Minutes - Laserfiche WebLink

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- Ti•I�•phone 47;�-7357 ` Page 53 � � ! �' T ,(�� - CI7�Y of O�.ZOl\ O _ , Post Office Box 66•Crystal Bay, Minneaota 55323•Municipal Offices ��1f { �� On the North Shore oj Lake Minnetonka -�' � o � C� ��c. �:�; - � C� D � [ D � January 8, 1980 JAN � ],ggp _CITY DF ORONO � Mr. Robert T. Brown 21II60 Byron Circle Greenwood, MN 55331 � Dear Bob: As a result of our discussion Saturday I understand that you will be discussing, at the Environmental Corrmittee, the recommendation to improve the phosphorus removal from the Maple Plain sewage treatment plant. The 208 Study conducted by the Metropolitan Council indicated that of the three alternatives that the most cost effective method when all considerations are included is to upgrade the Maple Plain plant to remove phosphorus on site. The City of Orono stronaly concurred with this finding because it has been our contention all along that the interceptor going through rural Orono, would have an a�verse impact on the density of development in the watershed,to Lake Minnetonka which in the 7ong run could very easily produce more pounds of phosphorus to Lake Minnetonka than the number of pounds being removed from the �laple Plain sewage treatment plant. I am enclosing with this letter the table from the Harza Study which shows that the measured quantity of phosphorus from the Maple Plain sewage treatment plant is 4,130 pounds and the � estimated number of pounds of phosphorus from the watershed run- off was 1,750 pounds for a total watershed of 5,880 pounds, yet the measured quantity of pounds of phosphorus actually getting to Lake Minnetonka was 1 ,890 pounds. By removing the entire affluent from the Maple Plain plant we therefore would be reducing the input to Lake Minnetonka by something less than 1,890 pounds of phosphorus per year which could very easily be negated by the urban type development that usually follows and interceptor.