Sustainability, Innovation, Excellence

Seneca Engineering’s goal is to provide quality, cost effective, constructible, and responsive solid waste consulting services throughout the region.



Seneca Engineering, LLC is a civil, environmental engineering and compliance support services firm. We have assembled a team of professionals who have collaborated to provide industry-leading expertise in cost effective, environmentally responsible landfill operations, composite liner system design/construction, and environmental compliance. Seneca specializes in solid waste planning, permitting, design, and construction management. 


Seneca’s unparalleled experience in landfill design, operational experience, and construction methods allows us to identify areas where value engineering can make a significant difference in project cost. A strong understanding of regulatory requirements and construction methods provides Seneca with the ability to communicate with and coordinate work between our clients, the various regulatory agencies, and the public in an extremely efficient manner


Our team has provided consulting services to public, private, and government landfills located in Ohio, Pennsylvania, Michigan, Alabama, Tennessee, and Indiana for well over 20 years. Seneca and its staff have a long-term professional and very productive relationship with the Pennsylvania Department of Environmental Protection (PADEP) and the Ohio Environmental Protection Agency (OEPA) and include staff in all Divisions (Material and Waste Management, Surface Water, Air Pollution Control, etc.)  

Design and Permitting

  • Alternative Liner Demonstrations
  • Alternatives Evaluation
  • Bid Documents
  • Capacity Optimization
  • Construction Plans
  • Feasibility Studies
  • Geotechnical Engineering
  • Hydraulics
  • Hydrogeology
  • Landfill Designs (all phases)
  • Leachate Collection Systems
  • Liner System Design
  • Permitting, Expansions
  • Permitting, Greenfield Sites
  • Site Investigations 

LFG Management

  • Design and Permitting
  • LFG Control Systems
  • Site Investigations

Operations Program Development

  • Airspace Management
  • Alternate Daily Cover
  • Alternate Materials Application
  • Hazardous Waste Exclusions
  • Special Waste Management


  • LFG Migration 
  • Remedial Measures
  • Feasibility Studies
  • Design
  • Construction Management

Closure/Post Closure

  • Planning and Permitting
  • Final Cover Designs
  • Closure Documentation
  • End Use Planning
  • Post Closure Monitoring and Inspection
  • Financial Assurance Estimates and Reviews
  • Landfill Redevelopment

Compliance Management

  • Computerized Compliance Tracking Systems
  • Economic Analysis
  • Environmental Compliance Audits
  • Expert Testimony
  • Feasibility Studies
  • Pre-acquisition Due Diligence Reviews
  • Public Hearings and Public Participation
  • Record Keeping and Regulatory Reporting
  • Transfer Station/MRFs
  • Siting and Feasibility Studies
  • Permit Documents
  • Operations Assessments
  • Construction Plans and Bid Documents
  • Equipment Specifications

Contact Seneca Engineering

We welcome the opportunity to discuss your project and explore cost-effective, compliant solutions.