Trigon Associates, llc

Investigation of Sewer Pump Station 212

City of Slidell

  • Location: Slidell, Louisiana
  • Completed: 2009

The City performed upgrades to Sewer PS 212 (Independence at Freedom Lane), which consisted of converting an existing suction-lift type sewage pumping station to a submersible-type station.

The new station was put into service around May 2009. Shortly after the newly-converted station became operational, the City started receiving complaints about noise (similar to that resulting from “water hammer”) from residents in an area where PS 212 was not believed to be discharging.

Trigon was asked to provide assistance to the City in investigation of the issue and developing recommendations. Subsequent to site visits and meetings with City staff, Trigon performed the following:

  • Review of maps and sketches provided by the City
  • Review of geophysical survey report
  • Review of pump selection and design calculations from the design/construction of PS 212
  • Preparation of independent calculations to:
    • verify wet well sizing/working volume required for acceptable pump/motor cycle times
    • estimate head losses through force mains to assist with determination of where PS 212 may be discharging
  • Development of recommendations for the City

Trigon prepared a Technical Memorandum for the City with the results of the investigation, including recommended actions for the City to take. Recommendations were implemented, including construction of a new force main.

Trigon performed these services pro bono for the City.

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