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

City of Milwaukee, Environmental City of Milwaukee, Environmental EngineeringEngineering

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APRIL 30, 2012 PRESENTATIONAPRIL 30, 2012 PRESENTATIONAT DISCOVERY WORLDAT DISCOVERY WORLD

BY ZAFAR YOUSUF, P.E.BY ZAFAR YOUSUF, P.E.SEWER DESIGN MANAGERSEWER DESIGN MANAGER

CITY OF MILWAUKEECITY OF MILWAUKEE

CITY-MMSD PARTNERSHIPCITY-MMSD PARTNERSHIP

CITY-MMSD PARTNERSHIP TO CITY-MMSD PARTNERSHIP TO IMPLEMENT I/I REDUCTION IMPLEMENT I/I REDUCTION PROJECTPROJECT

IN THE AREA BOUNDED BY: N. IN THE AREA BOUNDED BY: N. 8282ndnd ST. TO N. 92ND ST. FROM W. ST. TO N. 92ND ST. FROM W. CENTER ST. TO W. BURLEIGH ST.CENTER ST. TO W. BURLEIGH ST.


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CITY BACKGROUNDCITY BACKGROUND THE CITY HAS 96 SQUARE MILES AREA, WITH THE CITY HAS 96 SQUARE MILES AREA, WITH

ABOUT 600,000 POPULATION AS PER 2010 ABOUT 600,000 POPULATION AS PER 2010 CENSUS DATACENSUS DATA

THERE ARE 940 MILES OF SANITARY THERE ARE 940 MILES OF SANITARY SEWERS IN THE CITY COMPRISING OF SEWERS IN THE CITY COMPRISING OF ABOUT 850 SYSTEMS. ABOUT 850 SYSTEMS.

A SANITARY SYSTEM IS DEFINED WHERE A A SANITARY SYSTEM IS DEFINED WHERE A CITY SEWER MAIN NETWORK CONNECTS CITY SEWER MAIN NETWORK CONNECTS DIRECTLY TO THE MMSD’S OWNED AND DIRECTLY TO THE MMSD’S OWNED AND MAINTAINED METROPOLITAN INTERCEPTOR MAINTAINED METROPOLITAN INTERCEPTOR SEWER (MIS)SEWER (MIS)


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I/I in the City of MilwaukeeI/I in the City of Milwaukee Systems are monitored to compare sanitary base flow to Systems are monitored to compare sanitary base flow to

peak flows during rain eventspeak flows during rain events

Based on the data and subsequent modeling, 8% of Based on the data and subsequent modeling, 8% of sanitary systems showed high levels of I/I and were sanitary systems showed high levels of I/I and were determined to be non-compliant by Milwaukee determined to be non-compliant by Milwaukee Metropolitan Sewerage District (MMSD).Metropolitan Sewerage District (MMSD).

* * Non Compliant meter sheds are those meter sheds that Non Compliant meter sheds are those meter sheds that exceed the maximum flows established by MMSD's rules.exceed the maximum flows established by MMSD's rules.


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Where does I/I come from ?Where does I/I come from ? Cracks in pipesCracks in pipes

Roots thru jointsRoots thru joints

Storm Water InflowStorm Water Inflow

Sanitary Sewer Sanitary Sewer Foundation Drain Foundation Drain ConnectionsConnections

Storm Sewer Downspout Storm Sewer Downspout ConnectionsConnections


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Area Bounded by:N. 82nd St to N. 92nd St from W.

Center St to W. Burleigh St

I/I InvestigationI/I Investigation Non-Compliant sanitary Non-Compliant sanitary

sewer system showing sewer system showing high levels of I/I were high levels of I/I were dye testeddye tested

The storm sewer was The storm sewer was flooded with dye and the flooded with dye and the sanitary sewer was sanitary sewer was examinedexamined

Dye testing Results Dye testing Results showed private laterals showed private laterals as a source of 75% of as a source of 75% of the I/Ithe I/I

Dye Flooding Video ExaminationDye Flooding Video Examination


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Why was this area chosen?Why was this area chosen? This area was identified by the Wisconsin Department of Natural This area was identified by the Wisconsin Department of Natural

Resources (WDNR) and the Milwaukee Metropolitan Sewerage Resources (WDNR) and the Milwaukee Metropolitan Sewerage District (MMSD) as having high levels of Inflow and Infiltration (I/I)District (MMSD) as having high levels of Inflow and Infiltration (I/I)


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24-times base flow26-times base flow


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I/I Demonstration ProjectI/I Demonstration Project This project consists of inspecting and rehabilitating the This project consists of inspecting and rehabilitating the

sanitary building sewers (laterals) of homessanitary building sewers (laterals) of homes

This program was 100% voluntary and homeowners will This program was 100% voluntary and homeowners will not incur any costsnot incur any costs

This area has reported numerous basement backups over This area has reported numerous basement backups over the last few yearsthe last few years

SANITARY SYSTEM INFORMATIONSANITARY SYSTEM INFORMATION THIS SYSTEM IS COMPRISED OF APPROXIMATELY THIS SYSTEM IS COMPRISED OF APPROXIMATELY

18,500 FEET OF 8-INCH TO 12 INCH DIAMETER 18,500 FEET OF 8-INCH TO 12 INCH DIAMETER SANITARY SEWERS ORIGINALLY BUILT IN THE SANITARY SEWERS ORIGINALLY BUILT IN THE 1940’S1940’S

ALL SANITARY SEWER MAINS WERE CURED-IN-ALL SANITARY SEWER MAINS WERE CURED-IN-PLACE LINED IN 2010PLACE LINED IN 2010

THERE ARE 70 SANITARY MANHOLES THAT WERE THERE ARE 70 SANITARY MANHOLES THAT WERE ALSO LINED IN 2010ALSO LINED IN 2010

THERE ARE 563 PROPERTIES IN THIS SYSTEMTHERE ARE 563 PROPERTIES IN THIS SYSTEMCity of Milwaukee, Environmental City of Milwaukee, Environmental

EngineeringEngineering1010

PURPOSEPURPOSE REDUCE SANITARY SEWER OVERFLOWSREDUCE SANITARY SEWER OVERFLOWS

REDUCE BASEMENT BACKUPSREDUCE BASEMENT BACKUPS

REDUCE MAINTAINANCE COSTSREDUCE MAINTAINANCE COSTS

REDUCE WASTE WATER TREATMENT REDUCE WASTE WATER TREATMENT

COSTSCOSTSCity of Milwaukee, Environmental City of Milwaukee, Environmental


Project DetailsProject Details Letters were sent to all 563 home owners Letters were sent to all 563 home owners

regarding inspection and rehabilitation of their regarding inspection and rehabilitation of their sanitary sewer lateral. As of April 24, 2012, 512 sanitary sewer lateral. As of April 24, 2012, 512 home owners , approximately (91%), have home owners , approximately (91%), have consented for the rehabilitation.consented for the rehabilitation.

The City has worked with residents to minimize The City has worked with residents to minimize disruptions and inconvenience during the projectdisruptions and inconvenience during the project

Post rehabilitation flow monitoring data will be Post rehabilitation flow monitoring data will be compared with pre-rehabilitation data to estimate compared with pre-rehabilitation data to estimate the effectiveness that lateral lining has on flow the effectiveness that lateral lining has on flow reductionreduction


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What is being done?What is being done? A 4-Step ProcessA 4-Step Process

1. Sanitary Lateral Inspection1. Sanitary Lateral Inspection

2. Cleanout Installation2. Cleanout Installation

3. Roof drain dye testing3. Roof drain dye testing

4. Lateral Rehabilitation4. Lateral Rehabilitation


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1. 1. Sanitary Lateral InspectionSanitary Lateral Inspection


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A camera is A camera is inserted in the inserted in the lateral from the lateral from the sewer in the streetsewer in the street

The lateral The lateral condition is condition is assessed for assessed for rehabilitationrehabilitation


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2. Cleanout Installation2. Cleanout Installation

2. Cleanout Installation2. Cleanout Installation A hole is hydro-A hole is hydro-

excavated as close to excavated as close to the house as possiblethe house as possible

A Vac-A-Tee is A Vac-A-Tee is installed on the installed on the sanitary lateralsanitary lateral

The hole is then The hole is then backfilled to gradebackfilled to grade


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VAC-A TEEVAC-A TEE


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3. Roof drain dye testing3. Roof drain dye testing


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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

Lateral RehabilitationLateral Rehabilitation


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4. Sanitary Lateral Rehabilitation4. Sanitary Lateral Rehabilitation The existing sanitary The existing sanitary

laterals were televisedlaterals were televised

(roots and cracks are evident)(roots and cracks are evident)

The sanitary lateral is The sanitary lateral is rehabilitated with a cured-rehabilitated with a cured-in-place lining method in-place lining method from the public sewer from the public sewer main in the streetmain in the street

The liner is installed to The liner is installed to the cleanoutthe cleanout

Before

During

After

INSTALLED CONNECTIONINSTALLED CONNECTION


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CURRENT PROJECT STATUSCURRENT PROJECT STATUS

512 HOME OWNERS CONSENTED FOR 512 HOME OWNERS CONSENTED FOR LATERAL REHABILITATION (91%)LATERAL REHABILITATION (91%)

382 LATERALS HAVE BEEN LINED (75%)382 LATERALS HAVE BEEN LINED (75%)

PROJECT COMPLETION DATE IS MAY 25 PROJECT COMPLETION DATE IS MAY 25


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PROJECT COSTSPROJECT COSTS TOTAL PROJECT COST=$ 3.8 MILLIONTOTAL PROJECT COST=$ 3.8 MILLION

MMSD ALLOCATED FUNDS= $ 3.4 MMSD ALLOCATED FUNDS= $ 3.4 MILLIONMILLION

CITY FUNDS= $ 0.4 MILLION CITY FUNDS= $ 0.4 MILLION (In addition, city spent $ 600,000 for mainline lining)(In addition, city spent $ 600,000 for mainline lining)

AVERAGE COST PER HOME=$ 7,700AVERAGE COST PER HOME=$ 7,700City of Milwaukee, Environmental City of Milwaukee, Environmental


COST BREAKDOWNCOST BREAKDOWN TV CAMERA INSPECTION-$ 5 PER LIN. FT. (Average TV CAMERA INSPECTION-$ 5 PER LIN. FT. (Average

lateral length 60 lin. ft per home)= $ 300lateral length 60 lin. ft per home)= $ 300

LATERAL TRACING- $ 200 EACHLATERAL TRACING- $ 200 EACH

CLEAN OUT- $ 1,600 EACHCLEAN OUT- $ 1,600 EACH

ROOF DRAIN DYE TEST- $ 200ROOF DRAIN DYE TEST- $ 200

LATERAL LINER INSTALLATION LATERAL LINER INSTALLATION

$ 80 PER LIN. FT x 60 = $ 4,800$ 80 PER LIN. FT x 60 = $ 4,800


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EXAMPLES OF OTHER CITIES DOING SUCH EXAMPLES OF OTHER CITIES DOING SUCH PROJECTS PROJECTS

CITY OF NEW CASTLE, DELAWARE REDUCED ITS CITY OF NEW CASTLE, DELAWARE REDUCED ITS TOTAL FLOWS BY 73 PERCENT IN A SANITARY BASIN*TOTAL FLOWS BY 73 PERCENT IN A SANITARY BASIN*

ACHIEVED A 55 PERCENT REDUCTION IN PEAK FLOW ACHIEVED A 55 PERCENT REDUCTION IN PEAK FLOW RATES OF THE SANITARY BASIN*RATES OF THE SANITARY BASIN*

* TO JUDGE THE REHABILITATION EFFECTIVENESS, PRE-* TO JUDGE THE REHABILITATION EFFECTIVENESS, PRE-REHABILITATION FLOWS WERE COMPARED WITH REHABILITATION FLOWS WERE COMPARED WITH POST-REHABILITATION FLOWSPOST-REHABILITATION FLOWS


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EXAMPLES OF OTHER CITIES DOING SUCH EXAMPLES OF OTHER CITIES DOING SUCH PROJECTS PROJECTS

CITY OF NAPERVILLE, ILLINOIS REDUCED ITS TOTAL CITY OF NAPERVILLE, ILLINOIS REDUCED ITS TOTAL YEARLY FLOW TO THE TREATMENT PLANT BY 192 YEARLY FLOW TO THE TREATMENT PLANT BY 192 MILLION GALLONS IN ONE YEARMILLION GALLONS IN ONE YEAR

THEY ACHIEVED THIS BY LINING 65 MILES OF THEY ACHIEVED THIS BY LINING 65 MILES OF SANITARY MAIN LINES AND REHABILITATING 3,000 SANITARY MAIN LINES AND REHABILITATING 3,000 LATERALS SINCE 2002LATERALS SINCE 2002

DOING SUCH IMPROVEMENTS ALLOWED THEM TO DOING SUCH IMPROVEMENTS ALLOWED THEM TO DEFER CONSTRUCTION OF A NEW TREATMENT PLANTDEFER CONSTRUCTION OF A NEW TREATMENT PLANT


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2727City of Milwaukee, Environmental City of Milwaukee, Environmental EngineeringEngineering

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Our GoalsOur Goals Reduce chances of sanitary sewer overflows and Reduce chances of sanitary sewer overflows and

basement backups during heavy rain eventsbasement backups during heavy rain events

Reduce the maximum amount of I/I in the sanitary Reduce the maximum amount of I/I in the sanitary sewer systemsewer system

Judge the rehabilitation effectiveness by analyzing Judge the rehabilitation effectiveness by analyzing pre-rehabilitation flows with post- rehabilitation flows. pre-rehabilitation flows with post- rehabilitation flows.

Improve public health and the overall quality of life in Improve public health and the overall quality of life in the Citythe City

Follow upFollow up

A post rehabilitation survey A post rehabilitation survey was sent to all residents for was sent to all residents for comments and concerns comments and concerns regarding the projectregarding the project

To date, approximately 95% To date, approximately 95% of responses have been of responses have been positive regarding the project positive regarding the project (50% response rate)(50% response rate)


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USEFUL WEBSITES USEFUL WEBSITES MILWAUKEE METROPOLITAN SEWERAGE DISTRICT MILWAUKEE METROPOLITAN SEWERAGE DISTRICT

(MMSD) (MMSD) http://basementconnection.mmsd.com/

PRIVATE PROPERTY VIRTUAL LIBRARY (PPVL)PRIVATE PROPERTY VIRTUAL LIBRARY (PPVL) http://www.wef.org/PrivateProperty/

LMK ENTERPRISES, INC.LMK ENTERPRISES, INC.

http://www.performanceliner.com/City of Milwaukee, Environmental City of Milwaukee, Environmental



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QUESTIONS ?

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