The Environmental Sciences group at Sewall works with government, industry and commercial clients to develop innovative solutions to managing water resources and water quality. Integrating staff across multiple disciplines, the group collaborates with our partners in academia, business, government and the nonprofit sector to conduct research, seek grant funding, and implement projects in stormwater and watershed management, water quality monitoring, and environmental assessment, planning and permitting. Our aim is to help clients adopt best practices and protocols that not only meet regulatory compliance and reduce liability and costs, but also incorporate the newest and best environmental technologies.
Pollutants and nutrients carried by stormwater--intermittant runoff that does not soak into the ground--are recognized as the leading cause of water pollution. Water quality impairments and flooding cost homeowners, business and municipalities millions of dollars in damage each year. Traditional stormwater practices that direct stormwater to streams or into constructed ponds, wetlands, or subsurface-engineered devices are expensive to install and maintain, and often don't do an adequate job of protecting water quality. In partnership with the regional experts at the University of New Hampshire Stormwater Center, Sewall engineers research, design and implement stormwater controls that cost less to install and maintain, have low environmental impact, and protect water quality to meet regulatory requirements. Our design strategies include low-impact design (LID) methods such as :
We help our clients find creative financial solutions to funding stormwater programs, whether through securing grants or advising on the creation of a stormwater utility. Many communities across the US are addressing the challenges and costs of stormwater management through stormwater utilities, which generate funding through user fees. This is an untapped financial opportunity that is only now beginning to be pursued in New England.
Sewall scientists and engineers guide clients in restoring and protecting watersheds and their related ecosystems through planning and management of water resources and their uses and in reducing the impacts of water pollution on waterways and wetlands. Staff in Environmental Sciences were instrumental in founding PEARL, an online database for Maine lakes (lakesofmaine.org) and are integrally involved in the online watershed master planning process for the largest lake watershed in New Hampshire (winnigateway.org).
Site Design and Development
Site selection research, environmental assessment and wetland delineation are essential first steps to successful projects in site development, management, and restoration. Identifying site issues early in the land planning process expedites permitting, promotes low-impact site design and development, and protects valuable natural resources. To assist commercial and industrial developers, land management consultants, and owners of public and private lands, Sewall offers environmental site assessment, permitting design, and site development, management planning, and restoration solutions that integrate a broad range of services in engineering, geospatial, and natural resource consulting.
Working closely with private- and public-sector interests, non-governmental agencies, and federal, state and local regulators, Sewall professional staff provide integrated services to address our clients' water resource needs:
Stormwater utilities (PDF)
Dr. Kahl to present on stormwater technologies
ContactSteve Kahl, PhD
Director of Environmental Sciences
207 827 4456