Massachusetts Water Resources Authority · Contract 7153 Summary. 5 Process Overview. 6 Separator...
Transcript of Massachusetts Water Resources Authority · Contract 7153 Summary. 5 Process Overview. 6 Separator...
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Massachusetts Water Resources Authority
Mechanical ImprovementsBiosolids Processing Facility
Contract 7153
June 20, 2018
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• Construction completed in 1991
• Operated by New England Fertilizer Company (NEFCo)
• Process an average of 100 Dry Tons Per Day/Total Suspended Solids
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Biosolids Processing Facility (Background)
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Scope: Replace the following:
• Nine of twelve Separator Conveyors• Two Dust Collection Systems• Dome Cover Braces (four storage tanks)• Gas Boiler • Nitrogen Purge Generator System• Air Compressor System
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Contract 7153 Summary
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Process Overview
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Separator Conveyor
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Dust Collector System
Dust Collectors
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7153-Scope of Work
Sludge Tank Roof Cover(braces under roof cover)
Gas Boiler
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7153-Scope of Work
Nitrogen Purge Generator (fire suppression system)
Air Compressor System
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• Contractor: Daniel O’Connell’s Sons, Inc.
• Contract Price: $2,700,000 (+15% Design/CA fee)
• Contract Duration: 420 days
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Contract 7153 Summary
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Massachusetts Water Resources Authority
Remote Headworks and Deer Island Shafts StudyContract 7237
June 20, 2018
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Contract 7237 Shafts Location Plan and Scope of Work
SCOPE OF WORK
• Visual inspection, probing and hammer sounding of 7 shafts and 3 connecting structures and effluent channels
• Concrete cores taken from 7 shafts for lab testing
• Ventilation evaluation• Corrosivity analysis• Measurement of actual shaft diameters
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Ward Street, Columbus Park and Chelsea Creek Headworks
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Ward Street, Columbus Park and Chelsea Creek Headworks
Doorway from Connecting Structure into Shaft at Chelsea Creek Headworks
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Ward Street, Columbus Park and Chelsea Creek Headworks
Deteriorated Concrete in Shaft at Chelsea Creek Headworks
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Ward Street, Columbus Park and Chelsea Creek Headworks
Top of Effluent Shaft at Columbus Park Headworks
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Nut Island Headworks Shaft
South System Shaft at Nut Island Headworks
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Deer Island Treatment Facility Shafts
Shaft “C” Shaft “No. 1”
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• Two proposals were received on May 21, 2018
Arcadis U.S., Inc. $1,194,580 2,334 hoursMott MacDonald, LLC $1,371,788 4,856 hoursEngineer’s Estimate $802,010 3,878 hours
• Contract Start: July 2018
• Duration: 10 Months
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Contract 7237 Procurement
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Massachusetts Water Resources Authority
Chelsea Creek Headworks UpgradeContract 7161 - Change Order 14
June 20, 2018
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Chelsea Creek Headworks: Exterior Walls As Found
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Chelsea Creek Headworks: Masonry Repairs
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Chelsea Creek Headworks: Masonry Repairs
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Chelsea Creek Headworks: Masonry Repairs
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Chelsea Creek Headworks: Masonry Repairs
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Chelsea Creek Headworks: Masonry Repairs
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Chelsea Creek Headworks: Masonry Repairs
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Chelsea Creek Headworks: Temporary Roofing
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Chelsea Creek Headworks: New 480V Electrical Service
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Chelsea Creek Headworks: New Exterior Siding
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Massachusetts Water Resources Authority
Marlborough Maintenance FacilityConract 6650B, Change Order 10
June 20, 2018
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Pre
Building Entrance
Current
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Silo Ash Silos – Converted to Covered Storage
Soda Ash Storage Covered Storage
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CO2 Tanks Removed – Future Parking Area
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CO2 Room – Converted to Plumbing Shop
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Fluoride Room Converted to SCADA Room
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Portion of Pump Room Converted to Mechanical Shop
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Portion of Pump Room Converted to Electric Shop
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Mechanical Equipment Room Updated
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Portion of Mechanical Equipment Room Now Break Room
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Change Order No. 10 – Concrete Curbing
• Original Design in 2007 • Part of three Projects• Section of Concrete Curb Deemed to
be in Good Condition now in need of replacement
• Deteriorating Condition - Unforeseen• Cost of $29,346