I would like to take this opportunity to introduce our company and the services we provide. Ronald Johnson & Associates, P.S.C. is a consulting engineering firm that has been providing quality professional engineering and environmental consulting services for governmental, industrial, and private clients within the Western Kentucky Region since 1970.

We are committed to providing quality services and workmanship to our clients. We do so by understanding our client’s needs, being competent and honest communicators, and delivering a finished project that is on time and within budget.

The firm of Ronald Johnson & Associates, located in Madisonville, Kentucky, was established in February 1970. Our business is considered one of the oldest design firms in Western Kentucky. Since its origination, Ronald Johnson & Associates has consistently grown and diversified its services to include specialties in the areas of: flood plain management, civil, mining, and safety engineering; government and environmental services; project management; land surveys; land development; and construction inspection. Although the firm is relatively small in size, the expertise and the commitment of its employees has created and maintained a successful company that is highly responsive to the individualized needs of its clientele. Because of this reputable performance the firm serves as city engineer for the Cities of Dawson Springs, Cadiz, Greenville, Earlington and Hanson Kentucky and is also the engineer for Hopkins County and Henderson Flood Mitigation Board. RJA works for the City of Madisonville’s Engineering Department on an as needed basis.

To ensure quality service, Ronald Johnson & Associates has invested in state-of-the-art survey and CADD equipment and software that can support our efforts for the best design solutions for each project. Our methodology involves a design process, which incorporates professional collaboration, sustainable design principles, environmental stewardship, proven engineering practices, and fiscal responsibility.


We have a wide range of services to offer-

  • Roadway Design
  • Survey
  • Drainage Design
  • Streetscapes
  • Safe Routes to School
  • Bikeways/ATV
  • Construction Inspection
  • KEPSC Roadway Inspector

Land Survey
  • Boundary Survey
  • ALTA Land Title Surveys

  • ASTM Phase 1, 2 & 3
  • Environmental Remediation
  • Environmental Permits
  • Wetland Delineation
Water / Wastewater Design
  • Water Distribution Systems
  • Sewer Collection Systems
  • Water & Sewer Pump Stations
  • Rate Studies
  • Funding Assistance
  • Construction Inspection

Civil Engineering
  • Land Development Planning
  • Industrial Park Master Plan
  • Storm Water Master Plans
  • Flood Mitigation
  • Zoning Plans
  • City Incorporation Limits
  • Infrastructure Mapping
  • Topographic Surveying & Mapping
  • Utility Management Consultation
  • Construction Management
  • Resident Inspection
  • Construction/Bid Reviews
  • Special Inspections