Providing clean and ample water to domestic and industrial users is complex and often critical to the basic feasibility of a project. Similarly, proper handling of domestic and industrial wastewater is challenging both technically and from a regulatory perspective.

SLR helps our clients make informed, cost effective decisions early in the project design cycle for both water and wastewater systems, through permitting, project construction, startup, commissioning, and continued operations support and troubleshooting.

How can we help?

SLR is experienced in wastewater collection, pumping and treatment, and our team uses their scientific expertise to navigate complex regulatory issues including effluent toxicity modelling.

Our engineers have expertise in water supply development, treatment, pumping and storage. The identification of safe and reliable sources of water for domestic or industrial use is ever more challenging from an environmental, capacity, and regulatory point of view. As a result, investigation and design of appropriate water and wastewater systems at the early point of any project is one of the most crucial steps in the planning process.

SLR’s continued direction to ensure proper construction, operations, regulatory compliance, and troubleshooting complements the early project steps to ensure successful outcomes for our clients.

Our team

  • Stephen Dietzko Director of Engineering
    Stephen Dietzko

    Steve is the Engineering Services Manager overseeing water supply, wastewater, and related infrastructure design projects for municipal, utility, industry and private sector clients. He has experience in water distribution, pumping and treatment systems and wastewater pumping and collection systems. Steve has managed an number of complex large scale and institutional development projects and possesses a broad range of expertise that includes civil engineering design, construction, and regulatory permitting.

  • D’Ann Wilkins Managing Principal
    D’Ann Wilkins

    D’Ann Wilkins has 20 years of experience in microbiology, aquatic toxicity, wastewater and whole effluent toxicity projects and has extensive experience in the management of Toxicity Reduction Identification/Evaluation studies (TREs). These studies have included municipal and industrial facilities with a primary focus on processes within power plants, manufacturing, mining, electrodialysis water treatment plants and refineries.  She has a thorough knowledge of biological wastewater systems, state and federal water quality standards, regulatory drivers, laboratory practices and their applicability to wastewater compliance and enforcement.

  • George Caughman Principal Water & Wastewater Engineer
    George Caughman

    George is a Senior Project Engineer with field and office experience on both environmental and power plant projects. He practices in design, bid, and construction phases of sewage treatment plants, sewage pumping stations, force mains, water treatment facilities, potable water systems, stormwater pumping systems, intake structures, odor control, and the structures housing these facilities, as well as instrumentation, control, and telemetry systems. He has provided contract administration, construction oversight, inspection services, and Owner’s Representation on a multitude of projects varying in size and complexity.

  • Thomas Knowlton Principal Water & Wastewater Engineer
    Thomas Knowlton

    Thom is a Senior Project Specialist responsible for the project management, planning, design, and construction administration of water and wastewater projects. His practice includes design-bid-build projects of all sizes, and he has an in-depth understanding of water and wastewater pump stations, rehabilitation of pipelines for both water and sewer systems, and water storage tanks. Improving our community with the projects he completes is what Thom most appreciates about his role.