R98-35 ACCEPTING THE BID AND AUTHORIZING A CONTRACT

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. / _ , . OF�pFC` � 'a - c v �e / �[�� March 10, 1998 PUBLIC WORKS MEM4RANDUM � NO. 98 - 15 MEMORANDUM TO: Honorable Mayor and City Council FROM: James L. Williams, Jr., City Manager � Bruce A. McNabb, P.E., Director of Public Works � Stephen P. Swanson, P.E., City Engineer �� SUBJECT: East Prairie Street Sewer Rehabilitation City Project 9636 The East Prairie Street Sewer is the second of four planned projects to rehabilitate major sewer trunks in the City. The Lower Broadway Sewer Rehabilitation project was the first project and was completed in 1997. The third project is the rehabilitation of the Jasper Street and Southeast Interceptor Sewers. The inspection of the Jasper Street and Southeast Interceptor � Sewers has started, and the design will start in the spring of this year. The fourth project will be ' the rehabilitation of the Upper Broadway and Jasper Relief Sewers, which is planned to be ' completed in Fiscal Year 1999-2000. These projects were prioritized based on an inspection � completed in 1989 as a joint project between the City and the Sanitary District of Decatur. I The East Prairie Sewer begins at the intersection of East Prairie Street and 19th Street and e�ends west to its junction with the Jasper Street Sewer at the Illinois Central Railroad (refer to attached location map). This Sewer is reported to have been built in the early 1900's, and a section of the sewer was repaired by means of guniting prior to the 1940's. The records for this sewer are incomplete and information about the actual years of the sewer's construction and the repair work has not been found. The sewer is approximately 4,560 feet in length and ranges in pipe size from 42-inch to 72-inch diameter pipe. The interior of the sewer and manholes were inspected this last falVwinter to obtain detailed ' information about the sewer's condition. The inspection was done by Tele Scan, Inc., using video filming equipment and having personnel make personal inspections of the interior. The condition of the pipe was found to vary from poor, primarily in the 42-inch and 48-inch segments, to good for the 72-inch segment of the sewer. The smaller sized pipes have deterioration to their interiors