cover
TO: Mayor Richard C. Irvin
FROM: John Hoffmann, P.E., Engineering Coordinator
DATE: July 24, 2023
SUBJECT:
A resolution to award the White Eagle Force Main Improvements located in Ward 8 to H. Linden & Sons Sewer and Water, Inc. in the bid amount of $453,600.00.
PURPOSE:
To install an 8-inch force main to add redundance and reliability to the White Eagle Lift Station.
BACKGROUND:
Sanitary sewers utilize gravity flow to convey wastewater to wastewater treatment plants. Factors such as ground surface topography, soil conditions, constructability and cost effectiveness sometimes lead to the construction of a lift station in which flows are pumped through force mains to a higher elevation where they can then gravity flow to the wastewater treatment plant.
In 2022 and 2023, Fehr Graham designed plans and specifications for the new force main.
The new 8-inch force main will serve as the primary force main for the White Eagle Lift Station. Should issues arise in the future on the new force main, the force main flows will be diverted to the existing 6-inch force main. This redundancy is needed as the consequence of failure of the existing force main would result in numerous basement backups. In the current force main configuration, should a force main failure occur, any temporary bypass pumping would utilize at-grade piping. The bypass pumping would require 2 at-grade road crossings and 7 at-grade driveway crossings requiring temporary pipe ramps until the force main was repaired. This project would alleviate the need for at-grade bypass pumping pipe should a force main failure occur.
As of 2019, the White Eagle Lift Station pumps to the existing 6-inch force main approximately 4.5 hours per day.
DISCUSSION:
Two bids were received, opened, and read aloud on July 12, 2023. The bid tabulation can be seen in the attached Exhibit B. The lowest responsible bid in the amount of $453,600.00 was submitted by H. Linden & Sons Sewer and Water, Inc. The force...
Click here for full text