54" to 78" Transition in 20 LF

Project Location
Orinda, CA
Construction cost
--
Construction Start/End
01/2017 - 1 Week

Details

When was it constructed and how long has it been in service:
Unknown
Dimensions:

Diameter of line, sewer pipe material (RCP, MCIP, brick, etc.), length of rehab portion: 54” to 78” transition, approx 20 LF to make the transition

Depth of pipe:
20'
Depth of ground water:
N/A
Health and safety:
Used conventional confined space entry program.
Has any re-inspection been performed? What was the condition of the pipe?
No
References

Brett Margosian, PE
EBMUD
Brett.margosian@ebmud.com

Methodology

Ventilation and odor control used:
Forced Air to supply fresh air
Rehab method used:
A combination of spiral wound and flat panels to accomplish transition in under 20 LF
Cleaning method used (if required) and who cleaned the line:
Hydroblasting + 8000 psi, performed by contractor, Overaa Construction
Method of flow bypass or diversion, if used:
N/A –Plant shutdown due to other work being performed in plant

Hurdles

Problems encountered during construction:
None
Problems encountered after construction:
None