WWAdCon
January 22-23, 2015
Frankenmuth, Michigan
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Waterford, Michigan’s Trenchless
Maintenance Program
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Remember when rainstorms were a welcome occurrence...
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What Happened!?!?
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YOUR TOWN
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• Continuous
Routine Cleaning
• Reactive
Maintenance
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• Focus
Attention on
Problem Areas
• Remainder
Cleaned:
• By Location
• By Age
• As Needed
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• Asset Management Plans
• CCTV Technology
• GIS
• Reporting/Data Mining Tools
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• Pipe Age?
• Pipe Material?
• Flow Charac-
teristics?
• Surface Condi-
tions?
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Calcium Infiltration Root Infiltration Grease
Defective Tap Excessive Inflow Broken Pipe 15
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Open Cut vs.
Trenchless
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Open Cut vs.
Trenchless
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Contractor Selection
• Request for Qualifications for potential services required
on an “As Needed Bases”
• Agreement for a duration of time (typically 3 to 5 yrs.)
• Quality based selection process with price accounting for
a portion of the overall total
• Establish a base unit price for potential services required
• Selection is typically done via a Selection Committee
• Interviews and Office/Plant visits can be a part of the
evaluation
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• CCTV inspection
• File format / name is standardized for ease of future
uploading
• PACP coding preferred & required for State funded
projects
• Full MH to MH CCTV inspections performed
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• CCTV inspections reviewed for defects
• Defects recorded in pipe condition database
• Repair recommendations generated and reviewed
• MH to MH liner sections are prioritized based on type
of repair needed
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Cleaning, 728, 23%
Grouting, 127, 4%
Inspecting, 728, 24%
Lining - 3 Ft, 242, 8%
Lining - 10 Ft, 25, 1%
Lining - 20 Ft, 5, 0%
Lining - Laterals, 407, 13%
Lining - MH to MH, 306, 10%
Reaming, 529, 17%
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Sanitary Sewer Main Trenchless Rehabilitation
Length of Pipe Lined 55,241 LF
Length of Pipe Grouted 20,030 LF
Length of Pipe Rehabilitated 75,271 LF
Sanitary Sewer Lateral Trenchless Rehabilitation
Total Count 592
Accumulated Length (Ft) 20,605
Sewer Main and Lateral Combined Length of Pipe: 95,876 LF
Estimated Infiltration Rate: 0.5 GPM Per 100 LF of Pipe
Estimated Infiltration Eliminated: 479 GPM
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• Selection of the best (may not be lowest cost) contractor
is essential – Value is objective
• Consistency of information format (CCTV format, report
format, etc.) provides for smooth record keeping
• Review of inspections completed by individuals
proficient in rehabilitation techniques
• Minimize subcontracting
• Accurate record keeping by both parties is necessary
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Waterford’s Trenchless Maintenance Program
Thank You!
Bill Fritz, P.E., M.S. Director
Waterford Township DPW [email protected]
248-618-7464