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08/03/2020
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Trenchless rehabilitation of 96” combined sewer
Brian Shiels, PE
Project Manager
Iselin, NJ
Jersey City Municipal Utilities Authority Phase 3-4 Sewer Rehabilitation
Introduction The ProjectConsider design alternatives
Summary
Presentation overview
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• Serves 250,000 residents
• 230 miles of sewers
The client
08 March 2020Mott MacDonald | ECP/Emerging Leader Showcase 3
Jersey City Municipal Utilities Authority
• 5,000+ Catch Basins
• Under an Administrative Consent Decree
The Project
Approximately
12,000 linear feet of open cut replacement
30,000 linear feet of cleaning and CIPP Lining
All around Jersey City
Port Authority Jurisdiction (Holland Tunnel)
08 March 2020Mott MacDonald | Presentation 4
JCMUA Phase 3-4 Sewer Rehabilitation
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Interested Parties
Contractor & Subcontractor
JCMUA
JC police
City of Jersey City
NJDOT
NJ Turnpike Authority
PANYNJ
NJ I-Bank
Residents
08 March 2020Mott MacDonald | Presentation 5
The Holland Tunnel approach
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Preliminary investigations
Cleaning and assessment
Consider design alternatives
Rehabilitate 96” steel pipe
Project stepsAccess Agreement and approvals from the various Authorities
Preliminary Investigations
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The 96-inch pipe
Cleaning and Assessment
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CleaningNJDOT Utility Opening Permit
Access Pit Under Rt 139
The 72” access pit
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Safety
Consider Design Alternatives
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Rehabilitation design challenges
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Corrosion Corrosion
Obstructions / Corrosion
Steel Pipe Corrosion / Pitting
Traffic
Pipe Material
Pipe condition
Time Restrictions
Sags
Design alternativesRehabilitation of 2,400 LF of 96-inch riveted steel combined sewer pipe
1Guniting (original design)
2Geopolymer(spincastapplication)
3CIPP lining (field wet-out)
4Slip lining
5Open cut installation
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Styrene Free
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Gunite vs. Geopolymer
Sample photo from Milliken Infrastructure
Guniting
Unit Cost = $ 1,250 per LF
2,400 LF => $ 3,000,000
Coating Removal ~ $600,000
Total = $ 3,600,000
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Cost Comparison of Two alternatives
CIPP Lining
Unit Cost = $ 1575.00 per LF
2,400 LF => $ 3,780,000
Traffic Control $ 180,000
Inversion Access Area Rehab $ 52,000
Total = $ 4,012,000
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Rehabilitate 96-inch Steel Pipe
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Cutting access for liner
Prepping the CIPP liner
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More prep photos
Creating a vacuum
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Opening Pores / Beat the liner
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Improve resin circulation
Resin
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Resin and catalyst
Verify mixture & dye
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Elevating the liner
Water
Wet-out/Inversion ~ 240,000 gallons
(3 days continuous)
Tail End Phase ~ 240,000
(8-10 hours)
Cool Down Phase ~ 240,000
(10-12 hours)
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Tent cover
CIPP lining (pre-liner)40-52.9 mm (1.57-2.08 in)
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Backstop
Prevent end of liner from over stretching or opening
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Finished Product
Value for client
Design Life
Cost
Minimize motorist interruption
Thank you
Brian Shiels, PE
