Services

Civil Engineering

Designing it right the first time. Sewall depends on a comprehensive understanding of our client’s goals to appropriately plan and design your projects. We will guide you through the permitting process and expectations at the beginning of a project and provide you with a realistic scope of work and fee proposal to limit unforeseen expenses.    […]

Transportation & Traffic Engineering

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 […]

Permitting

Do I need a permit for this?  We know the answer! Sewall has worked closely with local, state, and federal regulatory agencies for decades to provide our clients with the information they need for permitting approval. This includes Site Law, NEPA, MS4, Permit by Rule, Traffic Movement, and Driveway permitting. Traffic Permitting Sewall has vast […]

Surveying

The oldest surveying firm in Maine, Sewall has conducted boundary surveys and produced topographic mapping for private and commercial landowners, business and government organizations, and utilities since 1880. Our team utilizes traditional methodologies and advanced technologies to collect the prolific data detail required to provide the accurate mapping our clients have come to expect. Standard […]

Energy

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 […]