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In 2006 and 2007, the City of Hammond and the surrounding communities battled recurrent flooding, much of which occurred in residents’ basements. From August 2006 – July 2007, the Hammond Sanitary District received approximately 2,500 complaints of basement flooding with many of these homes flooding multiple times.
Donohue was retained to identify potential causes of and solutions to recurrent basement backups such as those that occurred during 2006 and 2007. These basement backups pose a financial burden on the city and a health risk to property owners. Phase I of this project included updating the GIS Utility Database, updating and calibrating a collection system model, and completing a capacity analysis.
Phase II includes a public education & outreach program to help alleviate sources of I/I, an alternative analysis, and a Sewer System Evaluation Study (SSES). This phase involves the following:
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Sewer Ordinance Review – Reviewing the City’s existing sewer ordinance, particularly with regard to restrictions on the connection of downspouts in areas served by combined or separated sewers.
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Downspout Disconnection Program – Developing and implementing a program to promote public awareness of the correlation between rainfall, downspouts, and basement backups.
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Alternative Analysis – Determining the benefits of ongoing stormwater management projects. The analysis will include development of alternatives for alleviating system bottlenecks identified during the modeling phase.
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Sewer System Evaluation Study (SSES) – Locating specific system deficiencies in select areas that likely contribute to flooding using various methods, such as visual inspections, dyed-water-flooding, CCTV, smoke testing, etc.
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