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� , � <br /> � REGULAR t1ELTING OF TI3E ORONO COUNCIL, SEPTI,I4I3ER 26, 1977 Page 21 <br /> � Y�hen detailed design of the puN�ping stations was ORONO-LONG LAhE <br /> • done, it became api�arent that the Orono station INTERCEPTOR <br /> operating with a 1G" forcer�ain could cause the (Continued) <br /> � Long Lake station to lose the capability of pur.mp- <br /> ing its design flow. <br /> � . <br /> The 13" forcernain allows a selection of purnps <br /> � which are essentially the same for both stations. . <br /> This means operating conditions will be such <br /> � that the overall system will act like a single <br /> • pumping station with two pumps and 100% standby. <br /> + �i�he hydraulics of a system ���hich includes two <br /> punping stations with long force mains discharging <br /> � a single force main is very complex. `�'hese <br /> operating probleris were not analyzed in the <br /> � preliminary desic�n phase of this project. <br /> � An added benefit of the 18" forcemain is that, <br /> a instead of 125 or 150 horsepower motors that <br /> would be required for each of the Orono purnps <br /> � with the 16" line, 100 horsepower motors can <br /> be used. This results in a substantial enerc�y <br /> � saving. Even with the 18" forcemain, the Orono <br /> station will be unable to handle r:lore than the <br /> � flows projected in the report and approved bv <br /> • Orono. " <br /> � End oi letter <br /> � P�ayor Van Nest commented that you will notice that <br /> the design flow used in the Addendum to the <br /> � engineering report includes Baker Park, City of <br /> Idaple Plain, and the Vo-Tech School which were <br /> � to be reraoved from the design criteria for the <br /> . Orono-Long Lake interceptor. You will also <br /> note that they have increased the size of the <br /> � line on the Orono portion from 16" to 18" . <br /> � The Orono City Council feels strongly that vae <br /> must have a complete understanding on the <br /> � sewer service area for this interceptor as <br /> • well as the design criteria for the flows to be <br /> included before the project gets started. It <br /> � has been our experience that after the sewer <br /> goes in the ground there is no way to change the <br /> � impact of what the sewer was designed to handle. <br /> � The City of Orono wants to be certain that the <br /> proposed M.U.S.A, line and Corlprehensive Sewer <br /> � Plan are consistent with Orono' s Planning and <br /> , Comprehensive Guide Plan. <br /> � P9ayor Van Nest moved, Butler seconded, to enter <br /> the Orono-Long Lake Interceptor, Addendurn #2 , <br /> � Plans and Specifications on the October 11, 1977 <br /> Council meeting agenda. P2otion, Ayes (4) - 21ays (0) . <br /> w <br /> • <br />