APRIL 30, 2012 PRESENTATION    AT DISCOVERY WORLD BY ZAFAR YOUSUF, P.E.  SEWER DESIGN MANAGER    CITY OF MILWAUKEE        ...
CITY-MMSD PARTNERSHIP   CITY-MMSD PARTNERSHIP TO    IMPLEMENT I/I REDUCTION    PROJECT   IN THE AREA BOUNDED BY:    N. 8...
CITY BACKGROUND   THE CITY HAS 96 SQUARE MILES AREA,    WITH ABOUT 600,000 POPULATION AS PER    2010 CENSUS DATA   THERE...
I/I in the City of Milwaukee   Systems are monitored to compare sanitary base flow    to peak flows during rain events  ...
Where does I/I come from ?   Cracks in pipes   Roots thru joints   Storm Water Inflow   Sanitary Sewer    Foundation D...
Area Bounded by:                              N. 82nd St to N. 92nd St from                             W. Center St to W....
I/I Investigation   Non-Compliant                                          Dye Flooding Video    sanitary sewer system   ...
Why was this area chosen?   This area was identified by the Wisconsin Department of Natural    Resources (WDNR) and the M...
I/I Demonstration Project   This project consists of inspecting and rehabilitating the    sanitary building sewers (later...
SANITARY SYSTEM INFORMATION   THIS SYSTEM IS COMPRISED OF APPROXIMATELY    18,500 FEET OF 8-INCH TO 12 INCH DIAMETER    S...
PURPOSE   REDUCE SANITARY SEWER OVERFLOWS   REDUCE BASEMENT BACKUPS   REDUCE MAINTAINANCE COSTS   REDUCE WASTE WATER T...
Project Details   Letters were sent to all 563 home owners    regarding inspection and rehabilitation of their    sanitar...
What is being done?                A 4-Step Process   1. Sanitary Lateral Inspection   2. Cleanout Installation   3. Ro...
1. Sanitary Lateral Inspection   A camera is    inserted in the    lateral from the    sewer in the    street   The late...
2. Cleanout Installation      City of Milwaukee, Environmental   15                  Engineering
2. Cleanout Installation    A hole is hydro-     excavated as close     to the house as     possible    A Vac-A-Tee is  ...
VAC-A TEE City of Milwaukee, Environmental   17             Engineering
3. Roof drain dye testing                                A green dye is                                pumped into the    ...
Lateral Rehabilitation      City of Milwaukee, Environmental   19                  Engineering
4. Sanitary Lateral Rehabilitation    The existing sanitary                            Before     laterals were televised...
INSTALLED CONNECTION      City of Milwaukee, Environmental   21                  Engineering
CURRENT PROJECT STATUS   512 HOME OWNERS CONSENTED FOR    LATERAL REHABILITATION (91%)   382 LATERALS HAVE BEEN LINED   ...
PROJECT COSTS   TOTAL PROJECT COST=$ 3.8 MILLION   MMSD ALLOCATED FUNDS= $ 3.4    MILLION   CITY FUNDS= $ 0.4 MILLION  ...
COST BREAKDOWN   TV CAMERA INSPECTION-$ 5 PER LIN. FT.    (Average lateral length 60 lin. ft per home)= $ 300   LATERAL ...
EXAMPLES OF OTHER CITIES DOING SUCH                    PROJECTS   CITY OF NEW CASTLE, DELAWARE REDUCED ITS    TOTAL FLOWS...
EXAMPLES OF OTHER CITIES DOING SUCH                    PROJECTS   CITY OF NAPERVILLE, ILLINOIS REDUCED ITS TOTAL    YEARL...
Our Goals   Reduce chances of sanitary sewer overflows and    basement backups during heavy rain events   Reduce the max...
Follow up   A post rehabilitation survey    was sent to all residents for    comments and concerns    regarding the proje...
USEFUL WEBSITES   MILWAUKEE METROPOLITAN SEWERAGE    DISTRICT (MMSD)   http://basementconnection.mmsd.com/   PRIVATE PR...
QUESTIONS   ?City of Milwaukee, Environmental   30            Engineering
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Clean Rivers, Clean Lake 8 -- Milwaukee's New I and I Reduction Project/ Zafar Yousuf

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Clean Rivers, Clean Lake 8 -- Milwaukee's New I and I Reduction Project/ Zafar Yousuf

  1. 1. APRIL 30, 2012 PRESENTATION AT DISCOVERY WORLD BY ZAFAR YOUSUF, P.E. SEWER DESIGN MANAGER CITY OF MILWAUKEE City of Milwaukee, Environmental 1 Engineering
  2. 2. CITY-MMSD PARTNERSHIP CITY-MMSD PARTNERSHIP TO IMPLEMENT I/I REDUCTION PROJECT IN THE AREA BOUNDED BY: N. 82nd ST. TO N. 92ND ST. FROM W. CENTER ST. TO W. BURLEIGH ST. City of Milwaukee, Environmental 2 Engineering
  3. 3. CITY BACKGROUND THE CITY HAS 96 SQUARE MILES AREA, WITH ABOUT 600,000 POPULATION AS PER 2010 CENSUS DATA THERE ARE 940 MILES OF SANITARY SEWERS IN THE CITY COMPRISING OF ABOUT 850 SYSTEMS. A SANITARY SYSTEM IS DEFINED WHERE A CITY SEWER MAIN NETWORK CONNECTS DIRECTLY TO THE MMSD’S OWNED AND MAINTAINED METROPOLITAN INTERCEPTOR SEWER (MIS) City of Milwaukee, Environmental 3 Engineering
  4. 4. I/I in the City of Milwaukee Systems are monitored to compare sanitary base flow to peak flows during rain events Based on the data and subsequent modeling, 8% of sanitary systems showed high levels of I/I and were determined to be non-compliant by Milwaukee Metropolitan Sewerage District (MMSD).* Non Compliant meter sheds are those meter sheds that exceed the maximum flows established by MMSDs rules. City of Milwaukee, Environmental 4 Engineering
  5. 5. Where does I/I come from ? Cracks in pipes Roots thru joints Storm Water Inflow Sanitary Sewer Foundation Drain Connections Storm Sewer Downspout Connections City of Milwaukee, Environmental Engineering 5
  6. 6. Area Bounded by: N. 82nd St to N. 92nd St from W. Center St to W. Burleigh StCity of Milwaukee, Environmental 6 Engineering
  7. 7. I/I Investigation Non-Compliant Dye Flooding Video sanitary sewer system Examination showing high levels of I/I were dye tested The storm sewer was flooded with dye and the sanitary sewer was examined Dye testing Results showed private laterals as a source of 75% of the I/I City of Milwaukee, Environmental Engineering 7
  8. 8. Why was this area chosen? This area was identified by the Wisconsin Department of Natural Resources (WDNR) and the Milwaukee Metropolitan Sewerage District (MMSD) as having high levels of Inflow and Infiltration (I/I) 26-times base flow 24-times base flow City of Milwaukee, Environmental 8 Engineering
  9. 9. I/I Demonstration Project This project consists of inspecting and rehabilitating the sanitary building sewers (laterals) of homes This program was 100% voluntary and homeowners will not incur any costs This area has reported numerous basement backups over the last few years City of Milwaukee, Environmental 9 Engineering
  10. 10. SANITARY SYSTEM INFORMATION THIS SYSTEM IS COMPRISED OF APPROXIMATELY 18,500 FEET OF 8-INCH TO 12 INCH DIAMETER SANITARY SEWERS ORIGINALLY BUILT IN THE 1940’S ALL SANITARY SEWER MAINS WERE CURED-IN- PLACE LINED IN 2010 THERE ARE 70 SANITARY MANHOLES THAT WERE ALSO LINED IN 2010 THERE ARE 563 PROPERTIES IN THIS SYSTEM City of Milwaukee, Environmental 10 Engineering
  11. 11. PURPOSE REDUCE SANITARY SEWER OVERFLOWS REDUCE BASEMENT BACKUPS REDUCE MAINTAINANCE COSTS REDUCE WASTE WATER TREATMENT COSTS City of Milwaukee, Environmental 11 Engineering
  12. 12. Project Details Letters were sent to all 563 home owners regarding inspection and rehabilitation of their sanitary sewer lateral. As of April 24, 2012, 512 home owners , approximately (91%), have consented for the rehabilitation. The City has worked with residents to minimize disruptions and inconvenience during the project Post rehabilitation flow monitoring data will be compared with pre-rehabilitation data to estimate the effectiveness that lateral lining has on flow reduction City of Milwaukee, Environmental 12 Engineering
  13. 13. What is being done? A 4-Step Process 1. Sanitary Lateral Inspection 2. Cleanout Installation 3. Roof drain dye testing 4. Lateral Rehabilitation 13 City of Milwaukee, Environmental Engineering
  14. 14. 1. Sanitary Lateral Inspection A camera is inserted in the lateral from the sewer in the street The lateral condition is assessed for rehabilitation City of Milwaukee, Environmental Engineering 14
  15. 15. 2. Cleanout Installation City of Milwaukee, Environmental 15 Engineering
  16. 16. 2. Cleanout Installation  A hole is hydro- excavated as close to the house as possible  A Vac-A-Tee is installed on the sanitary lateral  The hole is then backfilled to grade 16 City of Milwaukee, Environmental Engineering
  17. 17. VAC-A TEE City of Milwaukee, Environmental 17 Engineering
  18. 18. 3. Roof drain dye testing A green dye is pumped into the roof gutters A video camera is inserted in the sanitary lateral to detect any dye leaking in the sanitary lateral City of Milwaukee, Environmental 18 Engineering
  19. 19. Lateral Rehabilitation City of Milwaukee, Environmental 19 Engineering
  20. 20. 4. Sanitary Lateral Rehabilitation  The existing sanitary Before laterals were televised (roots and cracks are evident)  The sanitary lateral is rehabilitated with a cured- During in-place lining method from the public sewer main in the street  The liner is installed to After the cleanout City of Milwaukee, Environmental 20 Engineering
  21. 21. INSTALLED CONNECTION City of Milwaukee, Environmental 21 Engineering
  22. 22. CURRENT PROJECT STATUS 512 HOME OWNERS CONSENTED FOR LATERAL REHABILITATION (91%) 382 LATERALS HAVE BEEN LINED (75%) PROJECT COMPLETION DATE IS MAY 25 City of Milwaukee, Environmental 22 Engineering
  23. 23. PROJECT COSTS TOTAL PROJECT COST=$ 3.8 MILLION MMSD ALLOCATED FUNDS= $ 3.4 MILLION CITY FUNDS= $ 0.4 MILLION (In addition, city spent $ 600,000 for mainline lining) AVERAGE COST PER HOME=$ 7,700 City of Milwaukee, Environmental 23 Engineering
  24. 24. COST BREAKDOWN TV CAMERA INSPECTION-$ 5 PER LIN. FT. (Average lateral length 60 lin. ft per home)= $ 300 LATERAL TRACING- $ 200 EACH CLEAN OUT- $ 1,600 EACH ROOF DRAIN DYE TEST- $ 200 LATERAL LINER INSTALLATION $ 80 PER LIN. FT x 60 = $ 4,800 City of Milwaukee, Environmental 24 Engineering
  25. 25. EXAMPLES OF OTHER CITIES DOING SUCH PROJECTS CITY OF NEW CASTLE, DELAWARE REDUCED ITS TOTAL FLOWS BY 73 PERCENT IN A SANITARY BASIN* ACHIEVED A 55 PERCENT REDUCTION IN PEAK FLOW RATES OF THE SANITARY BASIN** TO JUDGE THE REHABILITATION EFFECTIVENESS, PRE-REHABILITATION FLOWS WERE COMPARED WITH POST-REHABILITATION FLOWS City of Milwaukee, Environmental 25 Engineering
  26. 26. EXAMPLES OF OTHER CITIES DOING SUCH PROJECTS CITY OF NAPERVILLE, ILLINOIS REDUCED ITS TOTAL YEARLY FLOW TO THE TREATMENT PLANT BY 192 MILLION GALLONS IN ONE YEAR THEY ACHIEVED THIS BY LINING 65 MILES OF SANITARY MAIN LINES AND REHABILITATING 3,000 LATERALS SINCE 2002 DOING SUCH IMPROVEMENTS ALLOWED THEM TO DEFER CONSTRUCTION OF A NEW TREATMENT PLANT City of Milwaukee, Environmental 26 Engineering
  27. 27. Our Goals Reduce chances of sanitary sewer overflows and basement backups during heavy rain events Reduce the maximum amount of I/I in the sanitary sewer system Judge the rehabilitation effectiveness by analyzing pre-rehabilitation flows with post- rehabilitation flows. Improve public health and the overall quality of life in the City City of Milwaukee, Environmental 27 Engineering
  28. 28. Follow up A post rehabilitation survey was sent to all residents for comments and concerns regarding the project To date, approximately 95% of responses have been positive regarding the project (50% response rate) City of Milwaukee, Environmental 28 Engineering
  29. 29. USEFUL WEBSITES MILWAUKEE METROPOLITAN SEWERAGE DISTRICT (MMSD) http://basementconnection.mmsd.com/ PRIVATE PROPERTY VIRTUAL LIBRARY (PPVL) http://www.wef.org/PrivateProperty/ LMK ENTERPRISES, INC. http://www.performanceliner.com/ City of Milwaukee, Environmental 29 Engineering
  30. 30. QUESTIONS ?City of Milwaukee, Environmental 30 Engineering

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