MS4

Municipal Separate Storm Sewer Systems
Multiple Municipalities, Allegheny County, PA

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PWet Weather Plan

Urban Sewershed Wet Weather Plan Demonstration Project
Nine Mile Run, Allegheny County, PA

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Martinsburg WWTP

Wastewater Treatment Plant
Martinsburg, Blair County, PA

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Infiltration / Inflow (I/I) and Source
Flow Reduction

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Lennon, Smith, Souleret Engineering (LSSE) provides services for sewer system analysis, I/I quantification and flow isolation, design, permitting and construction observation of Infiltration / Inflow (I/I) projects in municipal sewer systems.

LSSE's recent experience includes performing SSES and related I/I investigations, flow monitoring and hydraulic modeling. A recent I/I mitigation project resulted in elimination of 50% of the measured I/I by replacing approximately 10% of existing sanitary sewers (installation of a new parallel sanitary sewer system up to individual basements and conversion of the existing sewers to a dedicated groundwater underdrain).

Services include:

  • Flow monitoring
  • Flow isolation studies
  • Present worth based cost effectiveness analysis
  • Design
  • Permitting and implementation
  • Post project certification
  • Hydraulic and hydrologic modeling / analysis
  • Partial Parallel Replacement to eliminate SSO's and achieve significant RD I/I and GWI flow reduction
  • RTK analytic parameters to be put into SWMM models to assess pipe capacity analysis

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