Methodology
Ventilation and odor control used:
Fresh air pumped into pipe past upstream air dam; maintained sealed lids during non-work periods, and adequate ventilation to carry odors downstream during the work periods.
Rehab method used:
Danby Panel Lok III (spirally wound) with full annulus grouting with cementitious grout with minimum compressive strength of 6000 psi.
Cleaning method used (if required) and who cleaned the line:
High pressure (3,000 - 10,000 psi) water blasting performed by the Danby licensee (Rondeau Bay Construction).
Method of flow bypass or diversion, if used:
Flows 100% diverted during work day, but reinstated during non-work periods. Laterals remained active at all times.
Hurdles
Problems encountered during construction:
Some problems with establishing diversion. In addition to the known horizontal curves, there were several unexpected vertical curves (undulations creating ponds/sumps) which slowed liner installation and required transition sections in liner. Also, there was an 18” pipe crossing the interior of the pipe at the crown.
Problems encountered after construction:
None
