42" & 48" Ring Levee Drainage Structures

Project Location
Matagorda, TX
Construction cost
$594,550 / $1170.38/ft (avg)
Construction Start/End
06/2013 - 10/2013

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:

Drainage Structure #2 - 42” CMP 345 LF
Drainage structure #4 - 48” CMP 88 LF
Drainage structure #5 - 42” CMP 75 LF

Depth of ground water:
N/A
Health and safety:
Conventional confined space protocol was used
Has any re-inspection been performed? What was the condition of the pipe?
No
References

Jennier Steen, P.E.
Halff & Associates
jsteen@halff.com

Methodology

Ventilation and odor control used:
Forced air was supplied where needed, other pipes were open on both ends.
Rehab method used:
Danby PL3 1/2" Sprial wound method.
Cleaning method used (if required) and who cleaned the line:
Hydoblasting with 8000 psi water pressure and debris removal.
Method of flow bypass or diversion, if used:
Weirs were built around the ends of the structures

Hurdles

Problems encountered during construction:
None
Problems encountered after construction:
Alligators in the pipes! Each day the pipes were checked daily to make sure no alligators were in the pipes.