1979-12-19 Regular Meeting - Laserfiche WebLink

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~ 1 ~,- ~~" ~ ~~ ~ MEMORANDUM {j~ .~ • December 4, 1979 T0: Jim Hudgens City Administrator FROM: Public Works Director SUBJECT: Chem-Lime Sewer Line In 1979, Chem-Lime Corporation entered Maxwell Plumbing Co, to construct a 10 from just north of their office buildi~ to North 16th Street. The project was and one lift station, the lift station Polk. into a contract with C. D. inch sanitary sewer line zg line, south to Polk and to include seven manholes to be built at 16th and In August 1979, I received a phone call from a plum.ber,.hzred by Tex-A-Mation Engineering, to tie into their tap. He told me that the manhole at Barbours Cut was full of water. I sent a crew out to see what the problem was. The crew called me out on the job and we discovered that the manhole at Barbours Cut and 16th Street had a false bottom. The manhole now must maintain a certain amount of head in order for the sewer to flow south to the lift station as it was intended. The problem is shown in the drawing provided. Flowline "C" is what was actually installed. As is shown in the drawing, the flow from station 6 + 65 to 11 + 25 is reversed. There should have been a 20% grade from the manhole at Barbours Cut to the lift station at Polk, as indicated by flowline "A" in the drawing. As indicated by flowline "B", I propose to re-Iay the line from station 0 + 00 to 11 + 25 using the existing manholes. A falle bottom will have to be poured in the manhole at Barbours Cut. The job estimate is as follows: 665 ft. of SDR 35 pipe @ $13.00 per ft. for 8-10 ft. depth $ 8,645.00 460 ft. of SDR 35 pipe @ $15.00 per ft. for 10-12 ft. depth 6,900.00 Manhole work at station 6 + 65 200.00 Engineering fee 400.00 $16,145.00 Please review this matter and discuss with me at your convenience. • Jack Burks Public Works Director