1. Project Location: Louisville, Kentucky
2. Diameter of line, sewer pipe material (RCP, MCIP, brick, etc.), length of rehab portion: 7' x 7' Reinforced Concrete Semi-Elliptical Combined Sewer, 1400 LF
3. When was it constructed and how long has it been in service: Put into service in 1958.
4. Rehab method used: Danby Panel Lok III-E Panels used after a curb was poured with a curved corner panel embedded to hold panels, finished with full annulus grouting with cementitious grout with minimum compressive strength of 5,000 psi.
5. Cleaning method used (if required) and who cleaned the line: Hydroblasting (6,000 to 10,000 psi) was performed by Danby installer, Boyer, Inc.
6. Method of flow bypass or diversion, if used: A temporary weir and permanent sluce gate was installed.
7. Depth of pipe: 20 feet.
8. Depth of ground water: Same as sewer.
9. Ventilation and odor control used: Forced air was supplied due to the depth of the pipe plug through downstream and mid-point manholes by exhausting air from upstream manhole.
10. Construction cost (total amount and cost per foot): $4,347,908
11. Month and year of start-up and end of construction: May 2018 to December 2018.
12. Problems encountered during construction: A void was found between the road surface and outide of ORI, vibrations felt in the pavement and a hole had been plugged in the wall of ORI. Void was filled with 650 CY of flow fill. Additional 150' trench safety was added and was considered sacrificial support.
13. Problems encountered after construction: None
14. Health and safety: Used conventional confined space entry program.
15. Has any re-inspection been performed? What was the condition of the pipe? No.
Engineer of Record: Brown & Caldwell
Owner: Louisville MSD