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 bfritz@waterfordmi.gov

248-618-7464