6' x 6' BOX COMBO SEWER - Mexicali, MX

1. Project Location: Mexicali, MX

2. Diameter of line, sewer pipe material (RCP, MCIP, brick, etc.), length of rehab portion:  6.56’ x 6.56’ Box RCP Combo sanitary and storm sewer, 150 LF test section

3. When was it constructed and how long has it been in service: Constructed in 1983, been in service for 30 years

4. Rehab method usedThe Commission chose to use a spiral wound method using the Danby PL3 1” profile with a finished ID of 6’.

5. Cleaning method used (if required) and who cleaned the line: Hydro-blasting with 5K to 8K psi water pressure, self-performed by Contractor, SOLSUB Constructors from Tijuana, Baja California, Mexico partnering with TES, Inc. of Tecate, CA

6. Method of flow bypass or diversion, if used: A weir was built and (2) internal bypass pipes installed.

7. Depth of pipe: 20’

8. Depth of ground water: N/A.

9. Ventilation and odor control used: Forced air was supplied

10. Construction cost (total amount and cost per foot): Unknown

11. Month and year of start-up and end of construction: 10-2013, 3 Weeks

13. Problems encountered after construction: One of the challenges came when a separate contractor working upstream of the rehab section had to pull their plug, releasing the flow every 4th day.  Proper notifications were given 3 hours in advance of the flow release giving the crews working downstream an opportunity to secure the work area and evacuate.  Once the plug was reinstated, it took approx. 3 hours to clean up and proceed with the installation. 

14. Health and safety: None.

15. Has any re-inspection been performed?  No