Department Of Public Works Environmental Engineering Section Inflow and Infiltration (I/I)...

Department Of Public Department Of Public WorksWorks

Environmental Engineering SectionEnvironmental Engineering Section

Inflow and Infiltration (I/I) Demonstration Inflow and Infiltration (I/I) Demonstration ProjectProject

Sanitary Sewer Lateral LiningSanitary Sewer Lateral Lining

11City of Milwaukee, Environmental City of Milwaukee, Environmental

EngineeringEngineering

Willie C. Wade, Alderman 7Willie C. Wade, Alderman 7thth District District

Zafar Yousuf, Sewer Design ManagerZafar Yousuf, Sewer Design Manager

City of MilwaukeeCity of Milwaukee

Wednesday October 17Wednesday October 17thth, 2012, 2012



What Area is Included in this Project?What Area is Included in this Project?



The purpose of this project is to reduce rain water from entering into The purpose of this project is to reduce rain water from entering into the sanitary sewers, ultimately reducing the chances of basement the sanitary sewers, ultimately reducing the chances of basement flooding from sanitary sewer backups.flooding from sanitary sewer backups.

City of Milwaukee I/I Demonstration City of Milwaukee I/I Demonstration ProjectProject



This project will focus on rehabilitating sanitary building sewers, also This project will focus on rehabilitating sanitary building sewers, also known as laterals, which is the pipe connecting the plumbing in your known as laterals, which is the pipe connecting the plumbing in your house to the City of Milwaukee sanitary sewer.house to the City of Milwaukee sanitary sewer.

City of Milwaukee I/I Demonstration City of Milwaukee I/I Demonstration ProjectProject

City of Milwaukee, Environmental City of Milwaukee, Environmental EngineeringEngineering 55

How Do Basement Backups Happen?How Do Basement Backups Happen? During heavy rain storms, rain water enters into sanitary sewers During heavy rain storms, rain water enters into sanitary sewers

through various defects. The amount of water in the sewer system can through various defects. The amount of water in the sewer system can rise above your basement floor level, causing sewer backups.rise above your basement floor level, causing sewer backups.



In July 2010, the City of Milwaukee received over 10,000 In July 2010, the City of Milwaukee received over 10,000 complaints of flooding and basement backups.complaints of flooding and basement backups.

Certain areas of the City of Milwaukee, including this area, Certain areas of the City of Milwaukee, including this area, were selected as a priority for sewer rehabilitation based on were selected as a priority for sewer rehabilitation based on high concentrations of reported backups and flooding.high concentrations of reported backups and flooding.

In this area, over 62% (280 of 449) of residents reported In this area, over 62% (280 of 449) of residents reported basement backups in July 2010.basement backups in July 2010.

In this area since 2010, The City of Milwaukee has In this area since 2010, The City of Milwaukee has completed $1.04 Million in public sanitary sewer main completed $1.04 Million in public sanitary sewer main rehabilitation and replacement, with an additional $400,000 rehabilitation and replacement, with an additional $400,000 in sewer replacement proposed for 2013.in sewer replacement proposed for 2013.

Why Your Neighborhood Was SelectedWhy Your Neighborhood Was Selected



This project consists of inspecting and rehabilitating the This project consists of inspecting and rehabilitating the sanitary building sewers (laterals) of homes.sanitary building sewers (laterals) of homes.

This program is 100% voluntary and the homeowners will This program is 100% voluntary and the homeowners will not incur any costs.not incur any costs.

The estimated cost of the project is $3.6 million, which will The estimated cost of the project is $3.6 million, which will be funded primarily through a grant from the Milwaukee be funded primarily through a grant from the Milwaukee Metropolitan Sewerage District (MMSD).Metropolitan Sewerage District (MMSD).

The City will work with residents to minimize disruptions The City will work with residents to minimize disruptions and inconvenience for the duration of the project.and inconvenience for the duration of the project.

Project DetailsProject Details



What will be done?What will be done?

A camera will be inserted in the lateral from the sewer main A camera will be inserted in the lateral from the sewer main in the street. The condition of the lateral is then assessed in the street. The condition of the lateral is then assessed for rehabilitation and/or repair.for rehabilitation and/or repair.



What will be done?What will be done?A small 2 foot diameter excavation will be made in A small 2 foot diameter excavation will be made in the yard as close to the house as possible.the yard as close to the house as possible.



What will be done?What will be done?A cleanout will be installed on the existing sewer lateral.A cleanout will be installed on the existing sewer lateral.



What will be done?What will be done?The hole will then be filled and the cleanout capped.The hole will then be filled and the cleanout capped.



What will be done?What will be done?The lateral will be cleaned and prepared for rehabilitation.The lateral will be cleaned and prepared for rehabilitation.



What will be done?What will be done?The liner will then be prepared for installation.The liner will then be prepared for installation.



What will be done?What will be done?The liner will be installed in the lateral and cured in place.The liner will be installed in the lateral and cured in place.



After RehabilitationAfter RehabilitationUpon completion of the project, the yard will be restored.Upon completion of the project, the yard will be restored.



After RehabilitationAfter RehabilitationNo concrete or shrubs will be disturbed during the project.No concrete or shrubs will be disturbed during the project.



Before and After Before and After RehabilitationRehabilitation

Before – Lateral is cracked and deteriorated. Water from the ground can enter the lateral freely.

After – Lateral is smooth and sealed. Water from the ground can no longer enter the lateral.



Why was this method chosen?Why was this method chosen?

Renews the sewer lateral with minimal disturbance to the property.

Eliminates root infiltration problems and other minor defects.



Why was this method chosen?Why was this method chosen?

Creates a one-piece pipe with no joints, eliminating Creates a one-piece pipe with no joints, eliminating groundwater infiltration.groundwater infiltration.

Only requires a short period of limited water use, Only requires a short period of limited water use, typically 8 hours or less. Other methods require longer typically 8 hours or less. Other methods require longer periods of restricted water usage.periods of restricted water usage.

Same proven method that was used in the Cooper Same proven method that was used in the Cooper Park area in 2012 and had 97% positive feedback.Park area in 2012 and had 97% positive feedback.



Tentative Schedule of WorkTentative Schedule of Work

December 2012 – Invitation for bids.December 2012 – Invitation for bids.

January 2013 – Contract award.January 2013 – Contract award.

March / April 2013 – Lateral rehabilitation work may March / April 2013 – Lateral rehabilitation work may begin with inspections and cleanout installations.begin with inspections and cleanout installations.

Late September 2013 - Lateral rehabilitation project Late September 2013 - Lateral rehabilitation project completion. The actual completion date will vary based completion. The actual completion date will vary based on number of homes participating.on number of homes participating.



GoalsGoals Lower the amount of I&I in the sanitary sewer system.Lower the amount of I&I in the sanitary sewer system.

Reduce the chances of having basement backups Reduce the chances of having basement backups during a heavy rain event.during a heavy rain event.

Improve public health and overall quality of life in the Improve public health and overall quality of life in the City of Milwaukee.City of Milwaukee.

For more information, please visit:For more information, please visit:

http://www.basementconnection.mmsd.comhttp://www.basementconnection.mmsd.com

Department Of Public Works Environmental Engineering Section Inflow and Infiltration (I/I)...

Documents

Transcript of Department Of Public Works Environmental Engineering Section Inflow and Infiltration (I/I)...