Title
GLWA-CS-055
Proposed Change Order No. 1
Professional Engineering Services for Yard Piping, Valves, and Venturi Meters at Water Works Park
Body
Agenda of: March 28, 2018
Item No.: 2018-633
Amount: N/A
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Sue F. McCormick
Chief Executive Officer
Great Lakes Water Authority
DATE: March 7, 2018
RE: Contract No.: GLWA-CS-055
Proposed Change Order No. 1
Professional Engineering Services for Yard Piping, Valves, and Venturi Meters at Water Works Park
Vendor: AECOM Great Lakes, Inc.
MOTION
Upon recommendation of Cheryl Porter, Chief Operating Officer - Water and Field Services, the Board of Directors (Board) of the Great Lakes Water Authority (GLWA), authorizes the Chief Executive Officer (CEO) to enter into Contract No. GLWA-CS-055, Change Order No. 1, "Professional Engineering Services for Yard Piping, Valves, and Venturi Meters at Water Works Park" with AECOM Great Lakes, Inc. for a time extension of ten (10) months at no additional cost for a total contract duration of forty-six (46) months; and authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
The existing high lift pump and yard piping system at the Water Works Park (WWP) Water Treatment Plant consists of eleven (11) high lift pumping units and six (6) discharge mains that provide pressure and flow to the WWP intermediate and low-pressure systems. The existing yard piping, valves, and venturi meters were installed between 1875 and 1992.
The older yard piping system (pre-1960) is primarily constructed of cast iron and riveted steel pipe, while the newer yard piping system (post-1960) is primarily constructed from pre-stressed concrete cylinder pipe. Contract drawings for the pre-1960 piping system are not available. The figure below depicts the overall yard piping layout with the pipes color coded by the year installed.
On April 26, 2017, the GLWA Board...
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