Principals

Marc J. Errichetti, P.E.

Marc Errichetti is a registered civil engineer with over 20 years experience in the field of Civil Engineering. He provides site development, storm drainage, utility, park and roadway design for public and private sector projects. Responsibilities include: managing project scope and budget, managing client and team coordination, and prepare project deliverables- plans, reports, technical specifications, estimates of probable costs.

He is experienced in several technical computer programs including AutoCAD, LDD, Stormshed, Watercad, WWHM, and King County Runoff Time Series. Marc is also experienced in the developing field of trenchless rehabilitation and installation methods for utilities, including slipforming, pipe lining and bursting, and directional drilling.

Email: marc [at] springlinellc.com
Phone: 206.957.8311

Peter Apostol, P.E.

Peter Apostol is a civil engineer with over 16 years experience in the field of Civil Engineering. He provides site development, storm drainage, utility and roadway design for public and private sector projects. Responsibilities include: managing project scope and budget, managing client and team coordination, and prepare project deliverables- plans, reports, technical specifications, estimates of probable costs.

He is experienced in several technical computer programs including AutoCAD, LDD, Stormshed, Watercad, WWHM, and King County Runoff Time Series.

Email: peter [at] springlinellc.com
Phone: 206.957.8311

Catherine E. Mirkin, P.E.

Catherine Mirkin is a registered civil engineer with 22 years of experience in transportation and site design projects. Her transportation design experience includes roadway widenings, pavement overlays, intersection redeisgns, traffic calming features, and bicycle and pedestrian facilities. She has worked for a variety of local agencies on projects ranging from curb extensions designs to new five-lane roadways. Her expertise is in developing high quality plans, specifications and estimate of construction (PS&E) packages for all types of projects.

Catherine has also provided civil engineering services for site design projects, primarily for public agency building projects.

She also has expertise in storm drainage conveyance, detention design, water quality design, and hydrologic and hydraulic modeling.

Email: catherine [at] springlinellc.com
Phone: 206.957.8311