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Trinkaus Engineering, LLC

Contact Information:

Steven D. Trinkaus, PE
Trinkaus Engineering, LLC
114 Hunters Ridge Road   Southbury, Connecticut     06488
Phone/fax:  +1-203-264-4558


B.S. / Forest Management/1980
University of New Hampshire

Professional Licenses:

Licensed Professional Engineer- Connecticut (1988)
Licensed Professional Engineer – Maryland (2017)

Professional Societies:

American Society of Civil Engineers  
Soil and Water Conservation Society of America
International Erosion Control Association 

Services Provided 

Low Impact Sustainable Development

  • Review of existing municipal land use regulations to identify barriers to the implementation of Low Impact Sustainable Development

  • Preparation of  regulatory language changes to facilitate the adoption of Low Impact Sustainable Development

  • Preparation of  design manuals for the implementation of Low Impact Sustainable Development strategies and processes with an approach that simplifies the design process

  • Application of environmental site design strategies to focus development concepts on  land most suitable for development  while enhancing the protection of environmentally sensitive areas

  • Design  of Low Impact Sustainable Development treatment systems, such as Bioretention areas, wet/dry swales, vegetated level spreaders, vegetated filter strips, subsurface gravel wetlands, constructed wetlands and/or pond systems, infiltration basins & trenches

  • Hydrologic analyses of current and post-development conditions to assess impacts of proposed development on storm water flows

  • Design of storm water control systems including detention and water quality basins and  appropriate planting plans

  • Perform hydrologic modeling of stormwater management systems to demonstrate compliance with regulatory benchmarks

  • Prepare Pollutant loadings analyses to evaluate the effectiveness of stormwater treatment designs in reducing pollutant loads

Wastewater Management:

  • Soil testing to determine suitability of land to support on-site sewage disposal systems for residential and commercial projects and assistance with identifying optimal location for both small and large scale system

  • Perform necessary calculations to model and design large scale subsurface sewage disposal systems under CT DEEP criteria and State Department of Public Health

  • Design of on-site sewage disposal systems in accordance with state and local health codes

  • Perform construction oversight of both small and large scale subsurface sewage disposal systems and provide certifications of compliance

Site Engineering:

  • Development feasibility studies 

  • Layout concepts to maximize development, while preserving environmentally sensitive areas

  • Design of horizontal and vertical road geometry

  • Preparation of grading, drainage and erosion and sedimentation control plans

  • Use AutoCAD Land Development, Civil3D, HydroCAD and Pondpack software packages

  • Layout and design of sanitary sewers

  • Bid estimates

  • Construction oversight

  • Third party technical reviews

  • Expert testimony

Published Articles

  • “Large-scale LID Design for urban expansion in South Korea” with co-author, Dr. Kyung Hak Hyun of South Korean Land and Housing Institute – Volume 3/Issue 4, August/September 2015 – Worldwater Stormwater Management by the Water Environmental Federation.

  • “Research team leads LID deployment in South Korea” – Volume 2/Issue 1, Spring 2014 – Worldwater Stormwater Management by the Water Environmental Federation.

  • “Low Impact Development, Sustainable Stormwater Management” – English article converted to Chinese and published in the Chinese Edition of Global Water Magazine, July 2013.  

  • “A Case Study:  Southbury Medical Facility and Low Impact Development” - January/February 2014 issue of Land and Water.

  • “A True Pioneer of Low Impact Development – Member Spotlight” – January/February 2014 Issue of Erosion Control – Official Journal of the International Erosion Control Association.

  • “Low Impact Development:  Changing the Paradigm” published in the March 2012 edition of PE, The Magazine for Professional Engineers by the National Society of Professional Engineers.  Article was also republished in the Spring 2012 addition of EWRI Currents (with permission of NSPE).

  • “Stormwater Retrofit of Existing Detention Basins” published in the March/April 2012 Land and Water, The Magazine of Natural Resource Management and Restoration with co-author Sean Hayden of the Northwest Conservation District.

  • “Out in the Open; Creating a Stormwater Park in the Heart of a Community” published in the April 2013 issue of WaterWorld by Pennwell Corporation.

  • “Creating a Stormwater Park in the City Meadow of Norfolk, Connecticut” published in the July/August 2013 edition of Land and Water

Erosion/Stormwater Products

RL Pritchard & Co. Inc.