The City of Dublin

2009 Annual Sanitary Sewer (SSO) and Water-in-Basements (WIB) Report

The City of Dublin (City) and the Ohio Environmental Protection Agency (OEPA) entered into a Director’s Final Findings and Orders (Orders) in February of 2009, for the resolution of Sanitary Sewer Overflow (SSO) and Water-in-Basements (WIBs) related concerns for the City’s sanitary sewer collection system. In general, the Orders require the City to develop and implement a Capacity, Management, Operations and Maintenance (CMOM) program. This program will address adequate capacity to convey base flows and peak flows for all parts of the sewer system, take all feasible steps to stop and mitigate SSOs and WIBs, minimize excessive Infiltration & Inflow (I/I) and to provide notification to all parties with a reasonable potential for exposure to pollutants associated with any overflow event.

Per the Orders, the City shall prepare an annual report of all SSO events and WIB occurrences from its own sanitary sewer collection system. This is the first annual report to be submitted to the OEPA as required by the Orders, Section V, Part 9, Page 9 of 13.  This report provides the required information collected by the City in 2009.

 

Highlights from 2009 include the following:

• The City continued its first rotation of sanitary sewer cleaning program that was initiated in 2005 and includes nine (9) sewer sheds. The current sanitary sewer cleaning program was continued in 2009 and will be completed in 2010. The new program will be initiated in 2011 thru 2018.

• The current televising program continued in 2009 in the Deer Run and North Fork Indian Run Sewer Sheds.  This program was initiated in 2005 will continue through 2010. A new televising program will be initiated in 2011 and will continue in each sewer shed until completion in 2018.

• In June of 2009, the City initiated a Manhole Inspection Program using NASSCO’s Manhole Assessment Certification Program (MACP) to identify other sources of I/I and structural defects in the publicly owned sanitary sewer manholes.

• As part of an on-going program the 2008-2010 Sanitary Sewer Lining Program, 25,165 linear feet of defective sanitary sewer clay tile was lined with Cured in Place Pipe (CIPP) during 2009 at an approximate cost of $850,000.00. A total of 108,450 linear feet of CIPP has been installed to date since 1999.

Download the 2009 Annual SSO and WIB Report