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1 BROOKHAVEN SCIENCE ASSOCIATES
CHILLED WATER & COMPR. AIR PIPING
Thomas F. Joos, P.E.Lead Civil/Structural Engineer
CFAC Review November 9-10, 2009
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Outline
• Overview (Scope/Cost)• Technical Progress• Schedule• Issues & Risks• Look Ahead• Conclusions
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Overview
• Scope (WBS 1.05.03.04)• New 24” diameter Central Chilled Water (CCW) Supply, 24” diameter CCW Return
& 4” diameter Compressed Air (CA) piping• New piping extends between the existing CCW/CA mains on Rochester Street to a
point at the edge of the NSLS-II Ring Building Construction site• Total distance of approximately 1,100 feet (each)• Includes all excavation/backfill, valves, appurtenances and connections to existing
CCW and CA mains.
• Cost• Contract amount = $1.436M
• Pre-bid estimate = $1.008M
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CCW Piping Plan
North
B-0452
Upton
Gas Station
Existing CCW/CA Mains
(Rochester Street)
CCW Piping Plan – Part 1
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CCW Piping Plan
North Existing Drainage
Swale & Culverts
Interface with Ring
Building Piping
Intersection Rowland St.
& Groves StreetCCW Piping Plan – Part 2
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Technical progress
• Contract Awarded 08/27/09
• Notice to proceed Issued 09/28/09
• Review of Contractor Submittals Ongoing– (Facilitates ordering of long lead items)
• Ordering of Materials Ongoing– (Ductile Iron Pipe, etc.)
• Obtained Work Permit/Digging Permit 10/14/09
• Contractors Schedule into Project Master 10/26/09
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Schedule
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Issues & Risks
• Crossing Rochester Street• Work starts with making taps to existing mains• Traffic Control (constricted due to other road closures)• Ability to close up road(s) prior to winter weather
• Trenching Rowland Street• Minimize interference with F&O operations• Ability to close up road(s) prior to winter weather
• Crossing Drainage Swale• Must cross swale to make interface with RB contractor installed piping• Weather dependent
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Look Ahead
• Considering delaying start of construction to Spring ‘10• Likely schedule would be start 3/15, complete by 6/15• Minimizes risks of having to work through winter weather• Takes advantage of available float in overall project schedule• CCW piping can be completed as late as December 2010 without
adversely affecting other project activities (Pentant 1 turnover Feb. ‘11)
• Would need to consider coordination with Ring Building Contractor installed CCW piping details (availability of blank flanges, etc.)
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Conclusions
• Contract awarded & firm price established
• Material ordering in progress
• Looking to proceed in a manner that reduces project risks
• Even with rescheduling, projected construction schedule will have CCW piping available to NSLS-II site well in advance of required date (Pentant 1 turnover), Feb. 2011. (approximately 1yr. of float)
