Water & Wastewater

At OEI, we recognize water as the planet’s most vital resource. Our team is dedicated to evaluating current water supplies, analyzing cost factors, and designing comprehensive systems for water treatment, storage, and distribution. We specialize in the development of advanced water and wastewater technologies, including reverse osmosis and membrane bioreactor (MBR) systems. In addition to the services below, our team not only excels in designing complex water systems, but also in securing the necessary permits from the Texas Commission on Environmental Quality (TCEQ) to ensure seamless project execution.

From Concept to Completion.

Water sources can be classified into two categories: groundwater and surface water. Groundwater is extracted from aquifers through wells that are strategically drilled and developed. Once brought to the surface, the water is transported through a network of pipelines and booster stations to storage facilities. If the groundwater does not meet primary and secondary water quality standards, it undergoes treatment processes to ensure it complies with regulatory requirements for potable water. Following treatment, the water is stored in elevated, or hydropneumatic tanks, which our team expertly designs and oversees throughout the installation process.

    • Groundwater Development

    • Groundwater Well Design

    • Condition Assessment

    • Groundwater Geology

    • Water Treatment System Design

    • Reverse Osmosis Systems

    • Utility Distribution Design & Relocation

    • Advanced Treatment System Design

    • System Modeling

    • Elevated Storage Tanks

    • Ground Storage Tanks

    • Condition Assessment

    • Stormwater Drainage Design & Studies

    • Stormwater Pollution Prevention Plans

    • Erosion & Sediment Control

    • Detention Pond Design

    • 404 Permits

    • HEC-RAS Analysis

    • Wastewater Treatment Design

    • Treatment & Operation Optimization

    • Lift Stations

    • Collection Systems Design

    • Reuse Planning & Design

    • System Modeling

    • Site Selection, Permits & Planning

    • Type I & IV AE Landfills

    • Phase I & II Site Assessments

    • Enviornmental Impact Statements

    • Geological Investigation

    • Treatment System Optimization

    • Wellfield System Optimization

    • Project & Program Management

    • Construction Management

    • Treatment

    • Distribution

    • TCEQ Compliance Monitoring

    • Certified RO Operators

    • Water Rights Negotiation

    • Regulatory Compliance Mediation

    • Permitting

    • Rate Analysis & Rate Structure

    • Master Planning

    • SCADA Design

Our firm excels in delivering innovative and sustainable solutions for water and wastewater systems. We specialize in advanced treatment technologies, efficient distribution design, and infrastructure development that meet the highest environmental standards. From comprehensive water resource management to state-of-the-art wastewater treatment facilities, we provide tailored services that ensure reliability, compliance, and long-term performance for our clients.

Unmatched Solutions. 

Have a question? We would love to connect with you. 

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Case Studies.

These real-world examples reflect our commitment to delivering effective, sustainable outcomes tailored to the unique needs of our clients.

City of Tomball

    • 18" Sanitary Sewer Rehabilitation (Burst-In-Place)

    • Oller Engineering, Inc. was contracted by the City of Tomball to perform an analysis and design the rehabilitation of an existing sanitary sewer line by utilizing the burst-in-place and cured-in-place method.

    • Located at Tomball Parkway and Hicks Road, OEI provided design and specifications for the procedure of increasing the existing sanitary sewer size from 12-inch Truss Pipe to 12-inch fusible HDPE and an existing 15-inch Truss Pipe sewer line to an 18-inch fusible HDPE line.

    • Project Start/Completion Dates: May 2021-May 2022

    • Location: City of Tomball, Tomball Parkway and Hicks Road

    • Budgeted Project Construction Cost: $450,000

City of Cleburne

    • 8" Waterline Replacement

    • OEI was contracted by the City of Cleburne to replace approximately 1,350-ft of 1-inch PVC Waterline on their E Henderson Road with an 8-inch C900 PVC waterline. This project also required installation of fire hydrants, water service connections, and associated appurtenances.

    • The project consisted of an expedited project schedule due to the location of the replacement and the area the waterline serviced.

    • OEI was able to complete design and specifications within the expedited schedule and remain on budget for the completion of the project. This area of their water distribution system will now allow for greater capacity to serve commercial and residential meters.

    • Project Start/Completion Dates: March 2022-December 2022

    • Location: City of Cleburne, East Henderson Road

    • Budgeted Project Construction Cost: $100,000

City of Andrews

    • 15" Gravity Main Sewer CIPP

    • OEI provided engineering design services for the City of Andrews for an existing gravity sewer main which consisted of a Cured-In-Place-Pipe, (CIPP) process.

    • We also designed the realignment of an existing gravity main between manholes 108 and 123 to remove existing 90-degree bends.

    • We continued design solutions to include new manholes along the length of 12-inch gravity sewer line on Mustang Drive per TCEQ required spacing of 500 feet.

    • Finally, we provided specifications to rehabilitate all existing manholes on the sewer main with spray in liner including all inverts.

    • Project Start/Completion Dates: July 2021-December 2021

    • Location: City of Andrews, Mustang Drive

    • Budgeted Project Construction Cost: $1.2M

 Ready to Drive Innovation Forward?

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