CCP 10-30-1995 - Laserfiche WebLink

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.- , I. Lift Station Number 6 . Location: Easement on Lakeshore along Lake Johanna Trail Type: Air Ejector I Manufacturer: Cantex Construction: Ejector "pot" in underground concrete structure Design Capacity: 30 gpm at 30 feet TDH . Constructed: 1961 Co=ents: I TIus is a unique type of pumping station that uses air pressure to push the wastewater to the discharge point. The design requires a sealed pressure chamber ("pot"), automatic valves and an air compressor to provide the "push", All of the equipment and electrical controls are housed . in a concrete structure below the ground level. Routine maintenance is difficult and time consuming due to the limited space available, the damp conditions and the coniined space situation. I Since the original construction in 1960, the system has been working reasonably well and has required only routine maintenance, however there is a significant concern about the safety of I working on this system in an underground location. Preliminary Reco=endations: .. This station should be considered for upgrading with a submersible pump system to eliminate the need for entering the underground structure and dealing with the safety problems. The station provides service for about 10 homes which are below the elevation of the gravity I sewer which runs along Lake Johanna Trail. If the lift station were to be eliminated, each of the homes would have to be selVed by an individual pump located in their yard or basement and new selVice lines would have to be installed from the individual pumps to the gravity line. It is feasible I to address the problem with individual pumps but since a reasonable collection system is already in place and operating, it appears to be less costly to modifY the one pump station and live with I the collector line as it is unless more significant problems develop. Lift Station Number 7 I Location: Shorewood Drive Type: Wet well! Dry well I Manufacturer: Smith & Loveless Construction: Concrete wet well, Steel tube dry well Design Capacity: 150 gpm at 45 feet TDH I Constructed: 1959, no major modifications Co=euts: I The lift station is located on an easement behind the "Presbyterian Homes" near the Lakeshore. Power is supplied underground from an overhead line on Sandeen Road. The I . generator connection is located on the power pole on Sandeen Road, which is remote from the lift station. Vehicle access to the lift station is difficult, but feasible. Operating personnel indicate that I