Markets and Sectors


Sewall has provided civil design, permitting, and survey services for dozens of individual solar projects. For each project, Sewall develops the civil site layout and design based on the solar array requirements and access needs. Civil plans include access road plan and profiles, site grading, typical sections, stormwater calculations/plans, sedimentation and erosion control plans, and […]

Natural Gas

Sewall’s geospatial professionals work for natural gas companies throughout the U.S. providing a broad range of consulting services such as asset management, field data collection, remote sensing, and addressing federal regulations such as determining class locations and high consequence areas.   Asset Management For over a half-century, Sewall has provided an extensive array of asset management […]


Sewall has worked in the forestry and natural resource sectors since its inception in 1880. Markets and Sectors: TIMO/Institutional/REIT  Private Investor  Forest Industry  Environmental NGO  Public  Forest Carbon  Services: GIS consulting  Remote sensing (satellite and aerial-based)  Forest data analytics  Fiber supply studies   Wood basin analysis   Economic studies     GIS application development and hosting  Land and forest cover type mapping 

Program & Construction Management

Project services from concept to reality. Sewall provides a wide range of program and construction management services to assist owners with the delivery of essential projects.  We work with our clients to understand their needs from conception through start-up and help them navigate through the myriad of complex decisions that impact the successful delivery of […]


Developing the business of infrastructure. Whether through site design or property development surveying, Sewall has been offering expertise to critical infrastructure for more than 140 years. Our infrastructure services range from feasibility and site selection analysis to construction administration and asset management. We offer full-service planning, design, survey, permitting, and construction management services that are […]


Energizing the future. Whether through natural gas or renewables, Sewall has been offering expertise to critical infrastructure for more than 140 years. Our Utilities team provides engineering, geospatial, surveying, remote sensing/reality capture, and modeling services to support a variety of utility and energy markets, including natural gas, wind farms, solar farms, biomass, water, wastewater, and […]


Connecting people in a smarter way. Whether providing traditional or specialized transportation engineering services, Sewall has been leading the industry in innovation and sustainability for more than 140 years. The requirement to maintain and improve our aging infrastructure is no small task. And those charged with maintaining and expanding our transportation system work constantly with […]


Sewall has been a key player in driving the adoption of renewable energy technologies and helped position Maine as New England’s leader in wind power. Our engineers supported the development of the first commercial wind project in Maine and the largest commercial wind farm in New England. Sewall continues to provide siting assistance, civil design, […]


Interest in and use of biomass as a sustainable supply of energy have grown dramatically in the US, Canada, and Europe during the past five years. More energy firms, government and provincial agencies, and industrial landowners are exploring the potential for biomass produced from North American timberlands to reduce coal, electric, and petroleum consumption, and its environmental impact, […]


The Challenge During the last five years, the demand for renewable energy resources has increased dramatically, increasing the need for accurate information and analysis on potentially available resources, optimal siting, and environmental impacts and benefits. The success of renewable energy development depends on a careful preliminary assessment, planning, permitting, site and facilities development, and asset […]