(508) 954-9787


Civil Site Engineering, LLC (formerly Yerka Engineering LLC) is a multifaceted civil engineering firm located in Uxbridge, MA. Principals Michael Yerka and Margaret Bacon, P.E. have gained an outstanding reputation doing business with municipalities and private developers in the South Central Worcester County area for over 30 years. The firm is distinguished for its “common sense solutions” to engineering problems brought about by the ever-increasing demands put on projects, due to more stringent regulations. Our team of engineers, wetland scientists, surveyors, and GIS specialists have the expertise to meet your project requirements. For over 30 years, we have designed and permitted many roadways and subdivisions. We are familiar with projects governed by changing local and state requirements, like the Massachusetts Wetlands Protection Act and NHESP Endangered Species.

Key Staff

Michael Yerka, Principal

Mike-Yerka Mr. Yerka, Principal of Civil Site Engineering, is a Civil Engineer, Land Surveyor and Certified Soil Evaluator with over 30 years experience in:

  • Commercial, industrial, residential and municipal site development projects.
  • Hydrological/Hydraulic analysis and the design of  stormwater mitigation and drainage systems
  • Private and municipal waste water systems
  • Extensive experience with MA Title V regulations and local permitting requirements
  • Oversees land development projects that range from initial site assessments through final design and construction oversight
  • Topographic and Property Line Surveys

Recent Projects
Southwoods Estates: Uxbridge, MA. An 18 Lot, 60 Acre, residential subdivision that is typical of the numerous subdivisions that Mr Yerka has been responsible for. Responsibilities include planning, surveying, environmental permitting, roadway design, construction oversight, hydrological/hydraulic analysis and the design of several stormwater management basins. Mr. Yerka was also responsible for the layout and design of all the subsurface sewage disposal systems within the subdivisions.

Mr. Yerka has a BS in Civil Engineering from Central New England College and is a State Certified Soil Evaluator.

Margaret Bacon, P.E., P.W.S., Principal

Margaret-BaconMs. Bacon is a Licensed Professional Engineer and a Professional Wetland Scientist with over 20 years experience planning, permitting, design and construction oversight for  private and public projects. Ms. Bacon’s experience includes:

  • Experience working on Chapter 149 Projects. Ms. Bacon was a Project Manager for the MA Dept. of Corrections (DOC) and managed several large facility and utility projects funded under MA Chapter 149
  • Transportation Planning, Environmental Permitting and Roadway Design; over five years experience working for MassHighway
  • Traffic Studies for  private development
  • Design and construction oversight of wetland restoration and replication projects
  • Design of stormwater management systems for roadway and private development projects
  • Familiar with State and Federal wetland permitting requirements and regulations
  • Project Manager and/or designer for subsurface utilities, including sewers, wastewater lift stations, waterlines and subsurface sewage disposal systems

Recent projects
Ms. Bacon was the DOC Project Manager for several large infrastructure projects, and worked closely with the Division of Capital Asset Management (DCAM). Having worked formally for two state agencies, Ms. Bacon has extensive experience in working on large roadway and facility related construction projects. Responsibilities include, for both agencies, planning, permitting, design, preparation of bid documents and construction oversight.

BS Civil Engineering from Rensselaer Polytechnic Institute
MBA from the University of Massachusetts
Associates Degree in Environmental Technology

Association of Massachusetts Wetland Scientists
Massachusetts Association of Conservation Commissions
American Society of Civil Engineers
Boston Society of Civil Engineers
Past Member of the Dalton Conservation Commission