Scrubgrass Run Flood Mitigation

Scrubgrass Run Flood Mitigation
Scott Township, Allegheny County, PA

Various MS4 Projects

Municipal Separate Storm Sewers (MS4s) for Various Municipalities in Western PA

Raingarden and swale

Aspinwall Riverfront Park, Grass Swale leading to rain garden




Lennon, Smith, Souleret Engineering, Inc. (LSSE) is experienced with designing stormwater management systems using the new DEP Best Management Practices (BMP) manual and assists clients with implementing and enforcing ordinances to satisfy the MS4 requirements. LSSE evaluates stormwater systems for capacity, makes recommendations for improvements, designs systems and prepares construction bid documents. LSSE also conducts flood damage assessment and prepares documents for reimbursement under PEMA and FEMA guidelines.

LSSE has extensive experience in the planning, permit submission / regulatory coordination, design and construction phase services for the integration of green infrastructure within stormwater management plans. Projects include a range of BMPs such as bio-swales, rain gardens, cisterns, fens, etc.

Projects include:

  • Facilities planning and design
  • Hydraulic and hydrologic modeling / analysis
  • Permitting - municipal separate storm sewer systems (MS4)
  • Flood damage assessment
  • Permitting - NPDES, Chapter 105 / 404 and general permits
  • Wetland and stream delineations
  • Wetland and stream mitigation plans
  • Post construction stormwater management plans
  • Erosion and sedimentation control plans
  • Green infrastructure evaluation studies
  • MS4 permit compliance