Dufresne Group is a consulting civil engineering firm providing services to municipal and private clients throughout Vermont and New Hampshire. We are based in Springfield, Vermont with three regional offices. The tanks being installed in this photo range from 4,000 gallons to 20,000 gallon capacity. Dufresne Group was awarded two Merit Awards for the 2019 Engineering Excellence Awards from the American Council of Engineering Companies- Vermont.
The first award was from the Environmental category. The project was for an. Dufresne Group was awarded the Grand Award in the Environmental Category of the 2018 Engineering Excellence Awards from the American Council of Engineering Companies for the Bellows Falls Asbestos Cement. Dufresne Group is pleased to announce its status as a Women Owned Business, effective with these promotions: Naomi Johnson - President, Christina Haskins - Vice President, and Andrea Day - Vice President.
The first award was from the Environmental category. The project was for an. Dufresne Group was awarded the Grand Award in the Environmental Category of the 2018 Engineering Excellence Awards from the American Council of Engineering Companies for the Bellows Falls Asbestos Cement. Dufresne Group is pleased to announce its status as a Women Owned Business, effective with these promotions: Naomi Johnson - President, Christina Haskins - Vice President, and Andrea Day - Vice President.
Services
Dufresne Group was founded by Robert E. Dufresne, PE (RED), who until 2014 was the sole stockholder.
In 2018, ownership of the company changed to Naomi Johnson, PE who serves as President and Christina Haskins, PE and Andrea Day, PE who serve as Vice Presidents.
With this ownership change, Dufresne Group is now 100% women-owned and is a registered Disadvantaged Business Enterprise (DBE) in Vermont and New Hampshire.
The past decade has been one of growth and transition with the addition of two new office locations in Vermont to better serve our clients and our staff.
In 2018, ownership of the company changed to Naomi Johnson, PE who serves as President and Christina Haskins, PE and Andrea Day, PE who serve as Vice Presidents.
With this ownership change, Dufresne Group is now 100% women-owned and is a registered Disadvantaged Business Enterprise (DBE) in Vermont and New Hampshire.
The past decade has been one of growth and transition with the addition of two new office locations in Vermont to better serve our clients and our staff.
Successful projects begin with comprehensive preliminary studies and evaluation reports.
The preliminary phase investigation should access the current systems and define any inadequacies or substandard components.
Once the inadequacies are defined, DG staff can compare alternative solutions to resolve the deficiencies and fulfill the project objectives.
Knowledge and actual experience with alternative systems is crucial for a meaningful comparison to be made.
Comparisons without experience in the type of processes or systems being compared can be of limited use.
The preliminary phase investigation should access the current systems and define any inadequacies or substandard components.
Once the inadequacies are defined, DG staff can compare alternative solutions to resolve the deficiencies and fulfill the project objectives.
Knowledge and actual experience with alternative systems is crucial for a meaningful comparison to be made.
Comparisons without experience in the type of processes or systems being compared can be of limited use.
The staff at DG has decades of experience in the process and civil design of both large and small scale surface water treatment systems in New England.
DG subcontracts with other associates for specialized engineering tasks including electrical, mechanical, and structural engineering.
DG has working relationships with many architectural firms and can pull the best team together for a specific project.
DG staff have managed the design phase of water treatment facilities utilizing the latest in process innovation including numerous types of package facilities.
DG subcontracts with other associates for specialized engineering tasks including electrical, mechanical, and structural engineering.
DG has working relationships with many architectural firms and can pull the best team together for a specific project.
DG staff have managed the design phase of water treatment facilities utilizing the latest in process innovation including numerous types of package facilities.
In New England, most of the water main networks first went into service in the early 1900's.
In many municipalities, this water main is still providing service today; even after a century of use.
However, cast iron water main installed prior to 1950 almost always was installed without an internal cement coating to prevent internal corrosion.
Corrosion of the internal cast iron surface results in formation of turbicules of iron oxide that reduces the effective diameter of these pipes.
In most New England water systems with typical low hardness and low alkalinity water, the old unlined cast iron pipe can now only carry about 40% of what a new pipe of the same diameter can carry.
In many municipalities, this water main is still providing service today; even after a century of use.
However, cast iron water main installed prior to 1950 almost always was installed without an internal cement coating to prevent internal corrosion.
Corrosion of the internal cast iron surface results in formation of turbicules of iron oxide that reduces the effective diameter of these pipes.
In most New England water systems with typical low hardness and low alkalinity water, the old unlined cast iron pipe can now only carry about 40% of what a new pipe of the same diameter can carry.
DG specializes in the evaluation and application of emerging and new technologies for municipal wastewater applications.
DG can assist with the design and engineering services during construction with treated wastewater recycle systems to reduce on site disposal area requirements.
The staff at DG has taken the lead in the evaluation and application of membrane systems to produce a tertiary quality wastewater effluent at a significant capital cost savings.
There are many wastewater treatment alternatives available today to double or quadruple the capacity of old technology wastewater treatment plants without geographical expansion or abandoning concrete structures and utilities.
DG can assist with the design and engineering services during construction with treated wastewater recycle systems to reduce on site disposal area requirements.
The staff at DG has taken the lead in the evaluation and application of membrane systems to produce a tertiary quality wastewater effluent at a significant capital cost savings.
There are many wastewater treatment alternatives available today to double or quadruple the capacity of old technology wastewater treatment plants without geographical expansion or abandoning concrete structures and utilities.
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