Wastewater

Your community depends on wastewater infrastructure that works — quietly and reliably, every single day. When systems are well-designed and properly maintained, residents never have to think about them. That’s exactly the outcome DLZ designs and builds: gravity and pressure systems built to handle today’s demands while anticipating tomorrow’s growth. From hydraulic analysis through final construction.

Every municipality deserves confidence in their wastewater system, regardless of size. Whether you serve a major metropolitan area or a small rural village, DLZ brings the same depth of expertise and the same commitment to getting it right. We study your system, understand your challenges, and stay by your side — through design, through construction, and long after the project is complete.

Featured Capabilities

Hydraulic Modeling & System Evaluation

Hydraulic Modeling & System Evaluation

Using advanced simulation tools, DLZ analyzes how wastewater moves through a community’s collection system to identify capacity constraints and vulnerabilities. This data-driven approach helps municipalities make smarter infrastructure investments and plan for future growth with confidence.

Gravity Sewer & Force Main Design

DLZ engineers design the backbone of wastewater collection — the gravity sewers and pressurized force mains that move flows efficiently from neighborhoods to treatment facilities. Thoughtfully engineered systems reduce long-term maintenance burdens and help communities avoid costly failures down the road.

Lift Station & Pump System Design

When gravity alone can’t move wastewater where it needs to go, DLZ designs reliable lift stations and pump systems that keep flow moving around topographic and geographic obstacles. Well-designed pump infrastructure minimizes energy costs and operational demands for municipal utility staff.

Inflow & Infiltration (I:I) Evaluation and Mitigation

Inflow & Infiltration (I/I) Evaluation and Mitigation

Rainwater and groundwater seeping into aging sewer systems can overwhelm treatment plants and cause costly overflows — DLZ identifies sources and designs targeted solutions, including Focused SSES using flow monitors to pinpoint I&I and find economical fixes for aging infrastructure. This protects water quality, extends system capacity, and avoids costly regulatory penalties.

Rehabilitation & Trenchless Design Solutions

DLZ helps municipalities extend the life of aging sewer infrastructure through modern rehabilitation techniques, including trenchless methods that minimize disruption to roads, businesses, and residents. These approaches deliver long-term system performance while reducing construction costs and community impact.

Construction Inspection

Construction Support & Program Implementation

From breaking ground to project closeout, DLZ provides on-the-ground expertise to keep wastewater projects on schedule, on budget, and built to spec. Municipalities benefit from a trusted partner who bridges the gap between engineering design and real-world construction realities.

Combined Sewer System Analysis

Combined sewer systems present some of the most complex hydraulic challenges in municipal infrastructure. DLZ models these systems in detail, supporting master planning efforts that identify capacity constraints, overflow risks, and the targeted improvements that reduce both regulatory exposure and community impact.

Related Work

All Work

Nelsonville Wastewater Treatment Plant

Nelsonville

, Ohio

Soo Locks and Dam Sanitary Sewer Replacement

Sault Ste Marie

, Michigan and Ontario

Blueprint Near South – Morrill Ann Area Green Infrastructure

Columbus

, Ohio

Downtown Sewer Separation and Drainage Study

Valparaiso

, Indiana

Related Capabilities

Architecture
Site/Civil Engineering
Structural Engineering
Materials Testing
Drilling & Explorations

Gary

Silcott Jr, PE, ENV SP

Vice President

Ohio

Jeffrey

Coffey, PE

Vice President

Ohio

Andrew

Lemberis, PE

Vice President

Indiana

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some of our wastewater experts.

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