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Water Resources

For more than 100 years, DLZ professionals have focused on protecting our water resources. Our teams include engineers, scientists, planners, and technicians with expertise and training to provide cost-effective workable solutions to growing water resources challenges. Some of our services include National Pollutant Discharge Elimination System (NPDES) and Inland Lakes and Streams permitting, modeling, drainage analysis, stormwater permit compliance monitoring, flood insurance studies, wellhead protection planning, surface water management, and green infrastructure planning and design. We take pride in tailoring our approach to each community’s specific conditions and goals.

Featured Capabilities

Surface Water Management

Effective surface water management starts with a thorough understanding of how water moves through a watershed. We analyze drainage systems, watersheds, and conveyance infrastructure to identify vulnerabilities and develop long-term strategies that reduce flood risk, improve system performance, and support sustainable community growth.

Floodplain & FEMA Studies

With more than 100 flood insurance studies completed for FEMA, our teams bring proven experience in floodplain mapping, modeling, and regulatory coordination. DLZ helps communities meet federal requirements, navigate the Letter of Map Amendment and Revision process, and make informed decisions about development and infrastructure in flood-prone areas.

Hydrologic & Hydraulic Modeling

Advanced hydrologic and hydraulic modeling provides the data-driven foundation for sound infrastructure and planning decisions. We evaluate water flow, stormwater system performance, and flood impacts across a range of scenarios, giving communities and project teams the insight needed to guide improvements and plan for long-term resilience.

Permitting & Regulatory Coordination

Environmental permitting is rarely straightforward. DLZ teams guide clients through complex federal, state, and local permitting processes — coordinating directly with agencies to streamline approvals, address regulatory requirements proactively, and keep projects moving without costly delays.

Stormwater & Infrastructure Solutions

Managing stormwater effectively requires solutions that balance regulatory compliance, community needs, and environmental performance. We design stormwater management systems that address both current demands and future conditions, integrating sustainable practices that improve long-term performance and reduce environmental impact.

Related Work

Soo Locks and Dam Sanitary Sewer Replacement

Sault Ste Marie

, Michigan and Ontario

Tappan Dam IRRM Automated Data Acquisition System

Harrison County

, Ohio

Levee Accreditation for the Village of Roseville

Roseville

, Ohio

Port of Monroe New Marine Terminal

Monroe

, Michigan

Related Capabilities

Laura

Gruzwalski

Department Manager

Michigan

Tim

Hampshire, PE

Vice President

Ohio

Jon

LaTurner, PE

Division Manager - Stormwater and Permits

Indiana