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<br />SOLICITATION NO:DACW23-97-B-OO <br /> <br />Page 1 of2 <br /> <br />o <br /> <br />Chicago District <br /> <br />East Chicago <br />Waterway Management District <br /> <br />--~--------------------------~--------~---------------------------------------------------------~---------------- <br /> <br />Project Newsletter <br /> <br />November 2001 <br />Volume 1, No.2 <br /> <br />Published jointly by the U.S. Army Corps of Engineers, Chicago District and the East Chicago <br />Waterway Management District <br /> <br />------ -------------------------------------------------------------------------------------------------- ------- ----------------------------- <br /> <br />Indiana Harbor and Canal Dredging and Disposal Activities <br /> <br />The u.s. Army Corps of Engineers, Chicago District (Corps), and East Chicago Waterway Management District are joint <br />project sponsors on work to remove contaminated sediment from the Indiana Harbor and Canal. The harbor and canal were <br />last dredged in 1973. The purpose of this project, approved in 1999 for construction, is to dredge and dispose of <br />contaminated Indiana Harbor and Canal sediment in a manner that is: <br />· safe to human health <br />· improves the environment, and <br />· is economically beneficial. <br /> <br />First Construction Activity <br /> <br />Initial activities will include constructing a facility to contain the contaminated sediment at the former Eel site, located at <br />3500 Indianapolis Blvd. in East Chicago, on the Lake George Branch of the Indiana Harbor Canal. The flIst item to be built <br />at the site is a elow- round cutoff wall or barrier to control roundwater flow, and its construction is expected to start in <br />Spring 2002. The cuto wa WI ex en approxrma e y feet e ow the ground surface, into the underlying clay till. The <br />cutoff wall is the fITst part of a two-part groundwater protection system that will serve to contain the contaminated sediment <br />dredged from the harbor and canal, and also contain contaqrinants that currently exist at the site in the soil and groundwater. <br />The second part of the groundwater protection system is discussed below. Dredging is planned to start in 2005. <br /> <br />Other Work In Progress <br /> <br />The containment facility was designed to contain sediment that is mechanically dredged from the harbor and canal. In order <br />to start dredging by 2005, the next few years will be busy ones at the site, starting with construction of the Groundwater <br />Protection System. The Groundwater Protection System is composed of two elements--the cutoff wall mentioned above, and <br />the groundwater removal system to be installed within the interior of the cutoff wall. The groundwater removal system will <br />consist of a granular trench and pumps, and will be used to maintain an inward gradient at the site. The shallow groundwater <br />table currently is encountered about 5 feet below the existing ground surface. The groundwater removal system will maintain <br />the groundwater level within the cutoff wall a minimum of two feet below the groundwater level outside of the property. <br />This inward gradient will work in conjunction with the cutoff wall to prevent groundwater on the site from migrating into <br />adjacent properties or toward the canal. <br /> <br />Background Air Monitoring Initiated <br /> <br />file://X:\0290 Delta S~nn!(, Gr~vPl\()L1-()n")() P;t Pvn'l"C';r."\U~,rl~lH,l~" D~_~,",_\C"nT Tr"Trr' A '"'r <br /> <br />., ., f., '''' ^ ^ r <br />