PROJECTS
OUR PROJECTS
Trotter and Associates, Inc. (TAI) has developed a handpicked team of professionals who are able to identify sound engineering solutions to unique problems. Our team holds leadership positions in local, regional, and national organizations. We are on the leading edge of best management practices, available funding sources, and regulatory changes. As part of our commitment to the industry, we are continuously investing into the evaluation and implementation of emerging technologies.
TAI’s staff works closely with each client to prioritize their needs, evaluate alternatives, and develop project-specific solutions. Throughout this process, TAI focuses on educating our clients with respect to the advantages of each alternative, as well as the cost. TAI’s clients are able to make informed decisions that meet the communities’ long-term needs.
TAI has completed numerous marquee projects that provide a complete solution including planning, design, funding, and implementation. Below is a sample of projects which have resulted in significant improvements to our communities’ civil infrastructure.
The Village of Sussex’s 2025 WPCF Improvements Project reached final completion in September, delivering upgrades to the facility’s influent screening, tertiary filtration, and aeration systems. Together, these improvements strengthen the facility’s reliability and efficiency for years to come. The project’s success reflects the collaboration among the Village of Sussex, Trotter and Associates as project engineer, contractors Sabel Mechanical and Pieper Electric, and the project’s equipment partners. Shortly after completion, the Village hosted the Southeast Region of the Wisconsin Wastewater Operators’ Association (WWOA) at the facility as part of its Ops-to-Ops program, which connects wastewater operators with neighboring facilities for tours, continuing education, and networking. Visiting operators walked through the upgraded systems, discussed project considerations and outcomes, and shared insights with peers. Trotter and Associates thanks the WWOA Southeast Region for its support and the Village of Sussex for opening its doors to fellow professionals. Projects like this one, and the knowledge sharing that follows, show the value of strong partnerships among owners, engineers, contractors, and operators.
The Fox River Water Reclamation District, Trotter and Associates, Inc., and IHC Construction Companies LLC are moving into the construction phase of the ADP Bar Screen Installation project at the District’s Albin D. Pagorski WRF (ADP WRF) in Elgin, IL. The project will replace two existing comminutors with Mechanical Bar Screens and washer compactors, both manufactured by Headworks International. The bar screens will be installed on the existing channels at Pump Station 10. To allow the District to operate and maintain the equipment in a weatherproof environment, a prefabricated fiberglass enclosure will be installed over the channels. The pump station and screen channel are located within the 100-year floodplain. To protect the District’s investment, a floodproof wall will be constructed around the screening channels and wet well. The design includes swinging flood doors to protect access and screening disposal openings in the floodwall. The project is projected to be completed in Fall 2027. Upon completion, the District will be able to screen up to 53 MGD. This allows the District to meet one of its planning goals: implementing screening processes at the ADP WRF.
Work is underway on a new drinking water well to enhance water supply capacity for Aqua Illinois’s water system within the Candlewick Lake community in Poplar Grove, Illinois. The first phase includes drilling Well No. 3 to a planned depth of just over 900 feet. Drilling is expected to continue through the fall, followed by test pumping to evaluate the new well. A subsequent phase will include the construction of a new well house, the installation of an additional iron-removal pressure filter, and other treatment improvements at the existing water treatment facility. Together, these improvements will expand the system’s water supply and treatment capabilities to support the community.
The Village of Roselle's Jerry A. Botterman STP Biological Nutrient Removal Upgrades project includes structural improvements that enhance the wastewater treatment facility while building on the long-term value of existing infrastructure. The project focuses on strategically repurposing existing structures to support updated treatment processes, improve operational efficiency, and provide flexibility for future facility needs. Structural improvements include modifications to the existing oxidation ditch to create separate treatment zones through the addition of new reinforced concrete walls, walkways, covers, and mixer supports. To support uninterrupted treatment operations, construction was carefully phased so only one oxidation ditch was taken out of service at a time. The project also repurposes the former return activated sludge flume area to accommodate new motor control centers (MCCs) and variable frequency drives (VFDs) beneath a new lean-to protective roof structure. In addition, a new masonry chemical feed building was designed with the capacity to accommodate a future second alum storage tank, providing flexibility to support the Village's long-term operational objectives.
The Lewis Avenue Detention Basin Phase I project is a stormwater infrastructure improvement for the City of North Chicago near Lewis Avenue and 20th Street. The project is intended to address chronic flooding within the Southwest Pettibone Creek Watershed by providing additional stormwater storage, reducing peak flows, and relieving pressure on the existing drainage system. Phase I includes construction of a stormwater detention basin, related earthwork and grading, storm sewer improvements, erosion control, restoration, and site stabilization. The basin will temporarily store runoff during major rain events and release it in a controlled manner to help reduce downstream flooding impacts. In addition to flood mitigation, the project includes wetland vegetation. Together with future phases, the improvements are expected to enhance public safety, protect nearby homes and properties, and improve the overall resilience of the local stormwater system. The project is expected to be funded through grant assistance from the Illinois Department of Commerce and Economic Opportunity. Phase I represents an important first step toward reducing flooding frequency and severity in the area. This phase will be completed this fall.
The Primary Clarifier Improvements Project for the Glenbard Wastewater Authority is officially complete. Trotter and Associates, Inc. provided design and resident engineering services for this rehabilitation project, which upgraded aging treatment equipment while improving operational flexibility and reliability. Major improvements included rehabilitation of the Authority’s two primary clarifiers and gravity thickener with new stainless steel collection mechanisms, replacement of sludge and scum pumps, piping, valves, meters, and associated electric and control systems, replacement of clarifier influent and effluent gates with the addition of electric actuators, replacement of large-diameter clarifier effluent piping in their diversion structure, and installation of new thickened waste activated sludge piping from the gravity thickener to the existing anerobic digesters to allow additional operational control of the primary sludge and thickened waste activated sludge. Additional upgrades focused on improving plant operations and odor mitigation by installing primary clarifier launder covers and a new walkable aluminum flat cover over the gravity thickener. Construction was completed while maintaining continuous plant operations. A 47 MGD temporary bypass system was implemented to facilitate installation of the diversion structure gates and large-diameter clarifier effluent piping, while a temporary solids thickening operation maintained the solids treatment processes during the gravity thickener equipment rehabilitation. Project Team Included: Glenbard Wastewater Authority, Trotter and Associates, Inc., Vissering Construction, Dahme Mechanical Industries, Connelly Electric Co., and TRI-R Systems, Inc.