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OF'�FC <br /> � 9G <br /> V 7C <br /> `it�%9 <br /> '��l I N O�`' <br /> June 2, 2000 <br /> PUBLIC WORKS MEMORANDUM ' <br /> NO. 2000-41 <br /> MEMORANDUM TO: Honorable Mayo and City Council <br /> FROM: Steve Garma ity Manager <br /> Bruce McNa .E.,Director of Public Works <br /> Stephen Sw ns n, P.E., City Enginee� <br /> Thomas Ode gbo, P.E., Civil Engineer II (Sanitary Sewer) <br /> SUBJECT: Jasper/Southeast Sewer Rehabilitation <br /> City Project 9955 (Phase III) <br /> Jasper Street / Southeast Sewer is a combined storm and sanitary sewer and consists of a <br /> main sewer and a relief sewer(refer to attached locale map). This section of sewer is categorized , <br /> as critical by City staff, because of the potential effects and cost of its replacement should it fail. ' <br /> The main sewer was constructed in about 1890, and the relief sewer was constructed about 1942. <br /> Presently, this sewer suffers from structural decay due to hydrogen sulfide and age. This has <br /> resulted in moderate to heavy infiltration and inflow of ground water and storm water into the <br /> sewer system. ', <br /> The materials of the sewer vary from brick to reinforced concrete with a short segment of '�, <br /> corrugated metal pipe. The sewer system varies in both cross sectional size and material, and is ', <br /> about two miles long. There are three cross sectional shapes in the sewer system. It includes <br /> elliptical shaped sewer ranging in size from 34-inches wide by 51-inches high to 42-inches wide <br /> by 63-inches high; circular shaped sewers ranging from 36-inches to 72-inches diameter; and a I <br /> 500-foot long section of rectangular shaped culvert 11 '/2 -feet wide by 2 '/2-feet high. <br /> The rehabilitation of this sewer was designed by City Staf£ The project was divided into <br /> three phases, because of the variation in the sewer cross sectional shapes. The phases are <br /> independent of each other and bidders could bid on any number of phases. The project was <br /> advertised for bids and bids were received and opened on Thursday, February 10, 2000. The <br /> results of the bid opening for Phase III are summarized as follows (a copy of the bid tabulation is <br /> attached): <br />