Terry Cowan, P.E.

President & CEO

Terry has 18 years of experience in the engineering field as a designer, project manager, team leader, and program manager.  His clients have consisted of private, municipal, state, and federal.  He has a wide range of experience in the water resources field and has worked on projects involving hydrologic and hydraulic (H&H) studies, channel relocations, bridge and culvert replacements, storm sewer design, irrigation systems, floodplain analysis and permitting, watershed improvement plans, and dam design.  In addition to water resources, Mr. Cowan has extensive experience in environmental permitting and emergency response.

Mr. Cowan specializes in H&H within the railroad industry and has worked for two major Class I railroads: Union Pacific Railroad (UPRR) and Burlington Northern Santa Fe Railway (BNSF).  His work with these two railroads has encompassed 23 states and totaled nearly a thousand projects.  These projects range from the arid deserts of the Southwest to the plains of the Midwest to the wet climates of the Northwest and the heat and humidity of the South.


Alexandra McDonald, P.E.

Senior Project Manager

Alex has five years of experience in the field of engineering. Her experience ranges from field work and project design to project management with a variety of clients and projects. Her clients have consisted of private, state, and federal. Ms. McDonald has a strong background in water resources involving hydrologic and hydraulic (H&H) studies and floodplain analysis and permitting. She also has experience in environmental permitting, emergency response, and construction oversight.

Ms. McDonald specializes in H&H within the railroad industry. Her work in this area has included field surveys, drawing preparation, hydrologic calculations, hydraulic modeling, and report preparation and presentation. She has also supported the environmental permitting of H&H projects as well as other railroad related projects. Her work with the railroad has covered over 15 states and includes well over 100 projects.


Tom Askin, P.E.

Project Manager

Tom has over nine years of years of experience in water resources including pumping systems, water treatment plant operations, septic design, hydrology, and hydraulics.  Mr. Askin started working with pumps in high school and moved on to running a small-batch water treatment plant on the continental divide during his summers at college.  Since graduating in 2013, he has worked on a variety of projects for federal and railroad clients.  His experience includes training staff on water treatment operations at the Upper Tenmile Creek Mining Area, operating and sampling for a pilot water treatment station at an abandoned mine site in the Barker Hughesville Mining District, and H&H projects for Union Pacific Railroad.

Along with Ms. McDonald, he brings a broad understanding of all aspects of a job: survey, analysis, design, and permitting; and is well versed in the H&H field as well as railroad projects.  They have experience with TR-55, Rational Method, regression equations, Log Pearson Type III analysis, HEC-RAS, HY-8, HydroCAD, as well as several other H&H applications.  They also have considerable survey experience, conducting hydraulic surveys for Union Pacific railroad across the country.  The surveys ranged from small culverts to bridges over 1,000 feet in length.