7' x 7' Semi Elliptical Sewer - Ohio River Interceptor (ORI) - Emergency Project

Project Location
Louisville, KY
Construction cost
Construction Start/End
05/2018 - 12/2018


When was it constructed and how long has it been in service:
Put into service in 1958

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

Depth of pipe:
20 feet
Depth of ground water:
Same as sewer
Health and safety:
Used conventional confined space entry program.
Has any re-inspection been performed? What was the condition of the pipe?

Engineer of Record:  Brown & Caldwell
Owner:  Louisville MSD


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.
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.
Cleaning method used (if required) and who cleaned the line:
Hydroblasting (6,000 to 10,000 psi) was performed by Danby installer, Boyer, Inc.
Method of flow bypass or diversion, if used:
A temporary weir and permanent sluce gate was installed.


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.
Problems encountered after construction: