Title
Contract No. 2102926
Design Build Contract Aeration Decks 1 and 2 Improvements
CIP #212008/BCE Score: 76.3
Body
Agenda of: February 28, 2024
Item No.: 2024-042
Amount: $209,880,500.00
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Suzanne R. Coffey, P.E.
Chief Executive Officer
Great Lakes Water Authority
DATE: January 30, 2024
RE: Contract No. 2102926
Aeration Decks 1 and 2 Improvements
Vendor: Kokosing Industrial, Inc.
MOTION
Upon recommendation of Navid Mehram, Chief Operating Officer - Wastewater Operating Services, the Board of Directors (Board) of the Great Lakes Water Authority (GLWA), authorizes the Chief Executive Officer (CEO) to enter into Contract No. 2102926, "Aeration Decks 1 and 2 Improvements" with Kokosing Industrial, Inc., at a cost not to exceed $209,880,500.00 for a duration of 2,730 days; and authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
The Water Resource Recovery Facility (WRRF), as required by its National Pollutant Discharge Elimination System (NPDES) permit, has a primary treatment system capacity of 1,700 million gallons per day (MGD), and a secondary treatment system capacity of 930 MGD. Aeration Decks 1 and 2 are included in the secondary treatment system, which reduces the carbonaceous biochemical oxygen demand (CBOD) and some soluble phosphorus of the primary effluent. Microorganisms in the aeration tanks use the suspended and dissolved organic material present in the incoming flow as food. Effluent from the aeration tanks flows to secondary clarifiers where the microorganisms form floc that settles to the bottom of the clarifiers as activated sludge. Most of the activated sludge is pumped back to the aeration tanks and mixes with primary effluent entering the aeration decks. Intermediate Lift Pumps (ILPs) are used to lift the primary effluent to the aeration tanks, from which the was...
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