Treatment Infrastructure

Municipal Treatment Plant Construction in the Northwest

Delivering durable, high-performance treatment infrastructure for public agencies across Oregon, Washington, Idaho, and beyond.

Comprehensive Treatment System Solutions for Public Agencies

Managing water and wastewater infrastructure requires a level of precision and durability that far exceeds standard construction. ORR Inc. serves as a premier municipal water treatment contractor, delivering comprehensive solutions for the construction, rehabilitation, and long-term maintenance of treatment plants.

We work exclusively with public agencies and municipalities throughout the Pacific Northwest—including Oregon, Washington, Idaho, Montana, Wyoming, Utah, and Nevada—to build systems that protect public health and the environment.

As a dedicated public infrastructure general contractor, ORR Inc. offers a distinct advantage: we self-perform the most critical phases of construction. Unlike firms that subcontract the majority of the work, our team handles heavy excavation, structural concrete, and complex pipe fabrication in-house. This vertical integration allows us to maintain strict quality control, adhere to tight schedules, and ensure that every cubic yard of concrete and every foot of piping meets the rigorous specifications required by state and federal regulators.

Our approach is defined by longevity. We understand that public funds must be invested wisely, which is why we build projects designed to last 30 to 50 years or more. Our leadership team brings hundreds of years of combined experience to the table, ensuring that potential issues are identified and resolved long before they become costly problems.

30-50

Year Lifespans

100%

Self-Performed Work

24/7

Emergency Response

What We Provide

Our Treatment Plant Capabilities

We provide a full spectrum of services for water and wastewater facilities. Whether a community requires a completely new facility to meet population growth or complex retrofitting of an aging system, our team has the expertise to execute the project safely and efficiently.

New Plant Construction & Expansion

Large-scale treatment plant construction from initial site preparation to final commissioning. We construct aeration basins, clarifiers, filtration buildings, and chemical feed systems.

Treatment System Rehabilitation

Breathing new life into existing facilities. We develop bypass plans and phased construction schedules to keep plants operational during rehabilitation work.

Public Agency Plant Maintenance

Specialized maintenance services covering deep well pumps, high horsepower motors, and structural inspections to prevent catastrophic failures.

50+

Year Designs

New Construction

New Plant Construction & Expansion

Building a new treatment facility from the ground up involves navigating a complex web of engineering specifications, environmental regulations, and site-specific challenges. ORR Inc. excels in large-scale treatment plant construction in the Northwest, managing every aspect of the build from initial site preparation to final commissioning.

We collaborate closely with agency engineers and project managers to ensure that the design intent is realized in the field. Our crews are experienced in constructing the massive structural components required for modern treatment plants, including aeration basins, clarifiers, filtration buildings, and chemical feed systems.

Aeration Basins & Clarifiers

Massive structural components built to exact specifications for optimal treatment performance

Filtration Buildings

Complete building construction with precision equipment installation

Chemical Feed Systems

Complex piping and control systems for precise chemical dosing

Service Interruptions

Rehabilitation

Treatment System Rehabilitation in Oregon & Beyond

Aging infrastructure is a critical issue for many municipalities. Pipes corrode, concrete degrades, and mechanical systems reach the end of their service life. ORR Inc. specializes in treatment system rehabilitation in Oregon and the surrounding states, breathing new life into existing facilities.

This work is often more complex than new construction because the plant must typically remain operational during the project. We develop detailed bypass plans and phased construction schedules to ensure that essential water or wastewater services are never interrupted.

Piping Replacement

Relining or replacing deteriorated piping systems while maintaining operations

Structural Concrete Repairs

Repairing basins, tanks, and structural elements to extend facility lifespan

System Upgrades

Retrofitting outdated pump systems with modern, energy-efficient technology

24/7

Available

Maintenance Services

Public Agency Treatment Plant Maintenance

Preventative maintenance is the key to avoiding catastrophic failures and expensive emergency repairs. ORR Inc. provides specialized public agency treatment plant maintenance services designed to keep critical systems running smoothly.

We go beyond simple check-ups; our team performs in-depth mechanical and structural maintenance that internal agency crews may not have the equipment or manpower to handle. Our maintenance capabilities cover the installation and servicing of deep well pumps and high horsepower submersible motors, which are the heart of many treatment operations.

Pump & Motor Service

Installation and servicing of deep well pumps and high-horsepower motors

Structural Inspections

Metal fabrication elements, catwalks, railings, and support structures

Preventive Programs

Predict costs accurately and prevent sudden downtime that disrupts service

In-House Capabilities

Technical Expertise & Fabrication

ORR Inc. distinguishes itself from other contractors through our extensive in-house technical capabilities. We do not rely heavily on subcontractors for the core components of the build, which gives us greater control over the schedule and the quality of the final product.

Structural Concrete Work

Concrete is the backbone of any treatment plant. We self-perform structural concrete work, constructing leak-proof basins, heavy-duty retaining walls, and precision equipment pads.

Excavation Work

Our in-house excavation division handles everything from mass grading to complex trenching for underground utilities. We manage difficult soil conditions throughout the Pacific Northwest.

Metal Fabrication & Pipe Systems

We perform miscellaneous metal fabrication and create custom fabricated pipe systems. We cut, weld, and assemble piping to exact specifications.

Pumping Systems

We are experts in the mechanical heart of the plant: the pumps. We supply, install, and maintain Deep Well Pumps and High Horsepower Submersible Motors.

Critical Infrastructure

Why Durable Infrastructure Matters

In the world of public works, “good enough” is never acceptable. The systems we build treat the water families drink and process the waste communities generate. The stakes are incredibly high, which is why durability and compliance are our top priorities.

Decades of Reliability

We build projects meant to last 30 to 50 years. Our goal is to perform the work so well that we don't need to return to that specific project for decades.

Regulatory Compliance

Treatment plants are subject to strict oversight by the DEQ and EPA. We hold the necessary licenses, ensuring all work meets environmental standards.

Operational Efficiency

High-quality construction leads to lower energy consumption and reduced maintenance loads for plant operators. Systems run as efficiently as possible.

Licensed & Certified

Certified Public Infrastructure Partners

ORR Inc. is built on a foundation of technical expertise and verified credentials. We are committed to maintaining the highest standards of professionalism and safety in the industry.

COBID Certified MBE #13787

Certified Minority Business Enterprise, helping agencies meet their diversity goals while receiving top-tier service

Oregon DEQ UST Service Provider License

License #30017 (Supervisor #30016) demonstrating our capability to handle sensitive environmental systems

Oregon DEQ SDS Installer License #39644

Licensed for specialized subsurface disposal system work

CCB License #238197

Fully licensed for commercial and public works construction

2026 AGC Pride Award Recipient

Recognition for commitment to excellence, safety, and community impact

Led by Stanley J. Orr, Paul R. Orr, and Stanley E. Orr, our management team possesses deeply rooted knowledge of public works construction.

How We Work

Our Project Delivery Process

We have refined our project delivery process to ensure transparency, safety, and efficiency for our public agency clients. Here is what you can expect when working with ORR Inc.

Bidding & Consultation

The process begins with a thorough review of the project plans and specifications. Our estimating team provides accurate, competitive bids. If requested, we engage in value engineering discussions to identify cost-saving opportunities without compromising quality.

Mobilization & Excavation

Once awarded, we rapidly mobilize our crews and equipment to the site. We handle all necessary permitting and safety setups. Our excavation team begins site preparation, ensuring that the ground is stable and ready for structural work.

Structural & Mechanical Installation

This phase involves the core construction activities. We pour structural concrete for tanks and buildings, fabricate and install piping systems, and place heavy mechanical equipment. Our project managers oversee daily progress to ensure strict adherence to the specifications.

Testing and Commissioning

Before we hand over the keys, we rigorously test every system. We pressure test pipes, check pump rotation and flow rates, and verify that all controls are communicating correctly. This commissioning phase ensures the plant is fully operational and compliant.

Training & Handover

We don’t just leave when the construction is done. We provide comprehensive training to agency staff on the operation and maintenance of the new systems. We ensure your team is comfortable running the facility before we close out the project.

Ready to start the process?

100%

Compliant

Value Engineering

Value Engineering & Constructability Consulting

The most successful projects are those where constructability is considered during the design phase. ORR Inc. offers value engineering for treatment plants, working alongside agency representatives and design engineers to optimize project plans before ground is broken.

We analyze designs for potential conflicts, material availability issues, or unnecessary costs. Our “hundreds of years” of collective field experience allows us to spot practical solutions that may not be obvious on paper.

We suggest alternative methods or materials that achieve the same performance standards at a lower cost or with a shorter construction timeline. This consultative approach helps municipalities stretch their budgets further while ensuring the final infrastructure meets all operational requirements.

FAQ

Frequently Asked Questions About Treatment Plant Construction

What is your service area for treatment plant projects?

ORR Inc. serves public agencies throughout the Pacific Northwest. Our primary service areas include Oregon, Washington, and Idaho. We also perform work in Montana, Wyoming, Utah, and Nevada. While we do not currently work in California, we evaluate projects there on a case-by-case basis.

Do you provide emergency repair services for treatment facilities?

Yes, we understand that treatment plant failures can be emergencies that threaten public health. ORR Inc. is available 24/7 for Municipal Agency Emergency Work. We can mobilize quickly to address pipe bursts, pump failures, or structural issues to restore service as fast as possible. Call us at 503-743-1000 for immediate assistance.

Can ORR Inc. assist with the design and budgeting phase?

Absolutely. We often act as consultants to assist agencies with constructability reviews, budgeting, and value engineering. Engaging us early in the process helps identify potential challenges and cost savings, ensuring a smoother construction phase and a better final product.

Are you certified for public works projects in Oregon and Washington?

Yes, we are a fully licensed and insured public works contractor. In addition to our Construction Contractors Board (CCB) license, we are a COBID Certified MBE. We are experienced in navigating the prevailing wage requirements and administrative paperwork associated with public funding.

What types of pump systems do you install and maintain?

We specialize in high-capacity pumping systems essential for municipal treatment. This includes Deep Well Pumps and High Horsepower Submersible Motors. We handle the complete installation, including the electrical controls, mechanical connections, and concrete pads required for these heavy-duty systems.

Partner with the Northwest's Trusted Infrastructure Builders

Your community relies on you to provide safe, clean water and effective waste management. You need a contractor who takes that responsibility just as seriously. ORR Inc. combines decades of experience, in-house technical capabilities, and a commitment to longevity to deliver treatment infrastructure that stands the test of time.