Louisville and Jefferson County Metropolitan Sewer District (LMSD) initially developed a sewer system hydraulic model in the early 1990s as one of the early steps in its Combined Sewer Overflow (CSO) Program development. This model has progressed significantly over the years; incorporating
changes that have occurred in the sewer system, capital projects that were constructed as well as new modeling software technology. It has been expanded to include all portions of the sewer system and has been updated to incorporate sewer system changes. Today the model covers approximately
25,000 acres of service area, includes both the combined and separate systems and in total contains approximately 33,000 nodes. Typically, presentation on sewer system hydraulic models have included wet weather planning work, such as CSO LTCP development or wet weather project sizing, such
as SSO abatement. LMSD use of the sewer system model included these applications, but as well included using them for many other initiatives presented herein. This paper will present four actual case studies of non-traditional, practical applications of LMSD sewer hydraulic model.
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