Monday 10:00 AM
Wet Weather 
[Presentation PDF]

Room: Emerald

Evaluation of the Causes of SSOs for Moline, Illinois, and a Long Term Program for Correction

The City of Moline experiences surcharging in one of its main interceptors tributary to the North Slope Wastewater Treatment Plant. Relief of the surcharge conditions occurs through manhole lids to the street and subsequent discharge to the Mississippi River. A study was designed to investigate the locations and sources of both rainfall derived and river stage induced flows. A comprehensive flow and rainfall monitoring program was developed so that a SWMM model could be applied to evaluate the entire interceptor with respect to hydraulic performance with respect to rainfall induced flows. The City evaluated private property RDII control measures, additional conveyance, expanded treatment capacity, and inline and offline storage to eliminate SSOs using a calibrated SWMM model. The City chose a combination of public and private maintenance practices and programs coupled with new facilities to gain control of SSOs to reduce peak flow caused by rainfall induced infiltration and inflow.

Moderator:  Dan Small


Brandon Koltz - Symbiont

Brandon Koltz is Vice President with Symbiont (Engineers, Scientists, and Constructors) with over 35 years experience in the environmental field. Mr. Koltz has worked with clients throughout the entire Midwest from Symbiont offices in Milwaukee and Indianapolis.  Originally from Illinois, he has a B.A. in Biology from Carthage College and an M.S. in Environmental Engineering from the University of Iowa. He is an active member of the Water Environment Federation Government Affairs Committee, the Wet Weather Work Group and the Sustainability Community of Practice.  He is Chairman of the Central States WEA Wisconsin Section Government Affairs Committee and a member of the Indiana WEA Government Affairs Committee.  He has worked on wet weather collection and treatment flow management projects throughout his career.