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Coordinated Infrastructure Improvements,
Out of Sight, Out of Your Mind
CIPP Lining of the Grand River Ave. Water
Main
Presented by:
Gary M. Mekjian, P.E. Farmington Hills DPS Director
John Thompson, LiquiForce Services
City of Farmington Hills, MI
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City of Farmington Hills
Project location
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Project History
Project purpose was to replace a existing 8” cast
iron water main
Existing main was over 50 years old
City was experiencing a high number of breaks,
causing service interruptions
Water Main provides partial service to Botsford
Hospital
No capacity issues
Project History
City originally intended on replacing existing water
main using HDD 10” HDPE pipe.
MDOT scheduled reconstruction of Grand River Ave
from 8 Mile Road to approximately Tuck Road
City’s intent was to install new water main in advance
of the pending MDOT project scheduled for the
Spring/Summer 2011
HDD Project was designed, bid, and awarded in
August of 2010
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Troubles Ahead
Contract began field verifying utility locations
City plans showed existing AT&T duct banks per
information provided by the utility
Surprise!!!! Information provided was not
accurate, making constructability questionable.
Cutting Bait
Worked with AT&T and Contractor to explore adjusting duct banks. No relief
Contractor provided estimate for a change order to HDD pipe under pavement. Price was too high
Decision was made to cancel contract. City and contractor negotiated a settlement
Contractor was paid for time and material. City stored materials at it’s DPW facility for the following years project
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Plan B
City decided on bidding project with 2 options
Option A: design and bid a HDD HDPE
project.
Option B: rehabilitate the existing water main
with cured in-place pipe (CIPP) lining
technology
Bids were received and opened on April 15,
2011
Option A (HDD)
2 bids received ranging from $785,000 to $1,100,000 Drawbacks
Would be constructed under the outside curb lane of Grand River Ave
Would require extensive coordination with MDOT project scheduling
Impact to businesses along corridor
Potential for future O&M issues with water main being under pavement of a busy major street
Advantages Lower cost
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Option B (CIPP)
1 bid received at $1,050,000
Drawbacks
More expensive than low bid for Option A
Fire Protection modifications required
Potential for vandalism of temporary system
Advantages
Much less disruption to businesses
Less restoration
Less service interruptions
Minimal scheduling conflicts with MDOT project
Reuse of existing pipe (Green)
Moving Ahead
Staff recommended proceeding with Option B
although construction cost was higher
Decision was based on advantages of Option B
being greater that the additional cost
These points were communicated very clearly by
both staff and City Manager to the City Council
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CIPP Lining Process
Project Scope
Rehabilitate 4,600 ft of 8” diameter cast iron
Establish Temporary Water Supply
R&R 12 Gate Valves & Well
R&R 8 hydrants
R&R 8 Dbox
15 – 8” reconnections
2 – 6” reconnections
Vertical bend under 36” storm Sewer
Why Rehabilitate
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Temporary Supply System
Temporary Supply System
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Temporary Hydrant in Place of
Hydrant
Within the project limits was Farmington Hills Fire Station #3
Drive Approach or Entrance
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Temporary Service Connections
Access Points to Water Main
Access points are strategically placed to minimize the disruption
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Other Utilities within ROW
6 fiber duct banks and a high pressure gas main
were parallel to the water main
Pipe Cleaning Operations
All scale is removed
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Various Mechanical Devices are
Utilized to Clean the Pipe
Clean Pipe
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CIPP Materials
Stand-alone, structurally sound liner which can
take the place of the host pipe if gradual
deterioration leads to disintegration
Rehabilitate 6” thru 12” mains
Made up of two concentric, tubular, plain weave
polyester jackets
Inner jacket bonded with polyurethane layer
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Tube Impregnation
Liner Installation
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Liner Insertion
Forming Shoe
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Internal Service Reconnection
Service connections 2” and smaller are opened / reconnected
via internal means eliminating the need for excavations
Post CIPP Installation
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Before & After
MDEQ Requirements
Standard disinfection and sampling of both
temporary supply & lined pipe
Pressure testing will be to the greater of 1.25
times the normal operating pressure or 75 p.s.i.
Allowable leakage is 0gpm
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Pressure Test Considerations
Test is done prior to reinstatement of services
Test is done on each line segment lined
immediately following installation
Gate Well Replacement
Only 60” of width existed between duct banks
thus 48” gate wells were required.
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Gate Well Rehabilitation
To prevent having to close the hospital entrance a trenchless
structure rehabilitation process was used thus eliminating the
need for excavation
Trenchless Prevents
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Lessons Learned
When to use CIPP Water Main Rehabilitation No capacity issues
Utility conflicts
Tight construction limits
Environmental and neighborhood disruption
Historically significant areas.
Better Local Control Over Rights-of-Way Legislative challenges
Get accurate as-built location of utilities when possible (duh-stating the obvious)
Restoration May want to perform in-house (small areas = difficulty finding sub-
contractors)
Question & Answer
Contact information:
Gary M. Mekjian, P.E.
Director of Public Services
City of Farmington Hills, Michigan
Phone Number: (248) 871-2530
John Thompson
Liquiforce Services, USA
(734) 955-2508
