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a � <br /> � � � . <br /> w��.DEc� <br /> a <br /> c <br /> v �e <br /> � <br /> '/[LINO�Y <br /> November 26, 1996 <br /> PUBLIC WORKS MEMORANDUM <br /> NO. 96-83 <br /> MEMORANDUM TO: Honorable Mayor and City Council <br /> FROM: James L. Williams, Jr., City Manager v <br /> Bruce A. McNabb,Director of Public Works�'�' <br /> Stephen P. Swanson, City Engineer�/ <br /> SUBJECT: Professional Engineering Services for the City of Decatur <br /> Silt Retention Basin- Oakley Township <br /> In 1992, the Macon County Board issued a special use permit to the City for its silt <br /> retention basin in Oakley Township. The basin was used to deposit silt dredged from Lake <br /> Decatur to allow the sediment to settle and dry out. In 1994, the City ceased depositing silt in the <br /> facility in compliance with the permit. In 1995, the City breached the dike surrounding the <br /> retention area at three locations to drain water from the facility to further aid in drying the <br /> sediment. This was done in anticipation of returning the site to crop production as proposed in <br /> the permit issued to the City. <br /> A number of drainage related problems have occurred in the vicinity of the basin. Mr. <br /> Andrew Black, Oakley Township Road Commissioner, considers these problems to be caused by <br /> the City's basin. One problem, a blocked drain tile just to the North and East of the basin, has <br /> been corrected by the City at its expense in July of this year. It was noted that the actual blockage <br /> in the drain tile may have been caused by heavy equipment operating over the tile along the west <br /> side of Prairie View Road and may not have been the City's responsibility. However, this matter <br /> was not pursued as there was no conclusive physical evidence who may have been at fault. <br />