State & Local Government

Water & Wastewater Systems Experience

WESTON understands the challenges involved in designing, constructing, operating, and maintaining your wastewater facility. Our nationwide engineering/design/build capability prescribes and implements the best-engineered solutions for your water and wastewater environmental problems.

WESTON works with local and state officials and regulators and establishes a health and safety plan for facility operation, as well as a preventive maintenance program for all equipment.

Design/Build Water Plant Upgrade for Western Berks Water Authority, Berks County, MD. The Western Berks Water Authority (WBWA) awarded a Design/Build contract to WESTON to upgrade the authority’s water treatment plant. The project included removal of one of the existing reactor clarification units and replacing it with two WATERLINK dissolved air flotation (DAF) systems, each capable of treating 4 million gallons per day (mgd), leaving room for a third DAF to be placed in the original clarifier. The upgraded system included replacement of the existing static mixer with a rapid mix tank, two-stage flocculation and DAF to produce treated water that meets a turbidity of less than 0.08 Ntu from the existing filters. The project also included construction of support structures for the DAF systems including a superstructure to protect the DAF units from the weather. WESTON provided all electrical, instrumentation, startup, and permitting services. The upgraded facilities produce drinking water with substantially improved taste and odor characteristics.

Phase 3 Capacity Projects, Carrollton Main Engineering and Design, New Orleans Sewerage and Water Board, New Orleans, LA. The Phase 3 Capacity Projects are in conjunction with the New Orleans Sewerage and Water Board’s Sewer System Evaluation and Rehabilitation Program (SSERP). Under SSERP, the Board is responsible for the study, evaluation, design, and construction associated with rehabilitating, repairing, and upgrading the sanitary sewer collection system. The objective of the Carrollton Force Main Project is for WESTON, as the lead design firm, to provide the engineering and design and to support the bidding and construction for the installation of approximately 21,000 linear feet of 18” to 42” force mains.

WESTON is responsible for the overall design, engineering, and development of construction bid packages for approximately 21,000 linear feet of 18” to 42” sanitary force mains for the Carrollton Basin for the Sewerage and Water Board of New Orleans, and will provide overall technical support and oversight to the Board over the course of the project. WESTON is the engineer of record for the project. WESTON is also responsible for the coordination of assignments associated with the project amongst our team sub-consultants. WESTON is responsible for the overall quality and delivery of all elements of the project.

Neighborhood Sewer Rehabilitation Design, City Of Houston Department Of Public Works And Engineering Capital Projects Division, Houston, TX. WESTON was contracted by the City of Houston’s Public Works Department to use previously collected sanitary sewer evaluation study information, as well as new sewer evaluation information, and prepare construction documents for needed repairs to neighborhoods that have a high number of citizen complaints.

WESTON gathered all existing data, including smoke testing, dye water flooding, manhole inspections, and CCTV data that had been previously collected by others.  WESTON reviewed the past rehabilitation program as-built drawings to identify lines and manholes that had been previously rehabilitated.  After the initial review of this information, WESTON contracted with a CCTV subcontractor to provide any additional information so that a complete review and assessment could be provided for each neighborhood.

Atlanta SSES Program Sewer Group One – C, City of Atlanta, Atlanta, GA. The purpose of the sewer system evaluation study was to inspect and inventory the municipality’s collection systems assets, to provide protection of public health, and to maintain structural integrity of a sewer system. WESTON provided field services, coordination, QA/QC reviews of electronic data submittals, field oversight, and scheduling for this EPA-mandated project. The project included bypassing pumping, smoke testing, manhole inspection, GPS survey of manholes, dye flood testing, line cleaning, CCTV inspection of lines, sonar inspections, and construction-related activities required to perform inspection activities.

Mid-City Basin Rehabilitation Engineering and Design, MWH for the New Orleans Sewerage and Water Board, New Orleans, LA. The Mid-City Basin Rehabilitation Project is associated with the New Orleans Sewerage and Water Board’s Sewer System Evaluation and Rehabilitation Program (SSERP). Under SSERP, the Board is responsible for the study, evaluation, design, and construction associated with rehabilitating and repairing the sanitary sewer collection system. The objective of the Mid-City Basin Project is for WESTON, as the lead design firm, to provide the engineering and design to support the bidding and construction for the rehabilitation of the manholes and collection system lines segments of the basin, and to provide overall technical support and oversight to the Board over the course of the project.

WESTON is the engineer of record for the project, and is responsible for the overall design and engineering for rehabilitation of the Mid-City Basin. WESTON is also responsible for the coordination of assignments associated with the project amongst our team sub-consultants.  WESTON is responsible for the overall quality and delivery of all elements of the project.

69th Street Wastewater Treatment Plant Improvements, City of Houston, Houston, TX. A study conducted by a third party identified the inability of the 69th Street WWTP influent lift station to provide the plant with the 2-hour permitted peak flow capacity as the primary cause of frequent discharges from the NSWWF—an upstream facility that provides storage capacity of excess influent flow during minor rainfall events and discharges flow into a bayou during rainfall events. The study documented that the existing influent lift station was operating at reduced capacity, approximately 74% of the rated pump capacity.

WESTON was contracted by the City of Houston to provide engineering services including inspection and evaluation of existing conditions, design or required improvements, and construction management during the installation of specific improvements. Improvements included influent pump station, gravity sludge thickeners, preliminary treatment facility, splitter box, maintenance building, aerobic sludge digester, clarifiers, electrical substation, waste activated sludge pump station, and compressor building. The main objectives of the improvements were to:

• Minimize the activation and discharge of the NSWWF by increasing the 69th Street WWTP influent lift station.

• Rehabilitate, refurbish, and replace worn-out system and process components.

• Enhance operation and maintenance of the Plant.

Little Walnut Rehabilitation Project, Loyola, Fairfield, Dungan, Meadowood, Rockhurst, and Little Emily, City of Austin Water Utility, Austin, TX. WESTON was retained by the City of Austin to perform design, bid, and award phase engineering services for the Little Walnut Rehabilitation Project – Loyola, Fairfield, Dungan, Meadowood, Rockhurst, and Little Emily, including the preparation of construction plan drawings and bid documents. Additional services provided include development of a stormwater pollution prevention plan (SWPPP); coordination with local, state, and federal permitting authorities; and development of special specifications.

This project was included in the Austin Clean Water Program (ACWP), created to comply with an Administrative Order by the Environmental Protection Agency (EPA) to eliminate wastewater overflows. The scope included 11 separate wastewater repairs by various methods. WESTON developed technical memoranda for use in determining appropriate rehabilitation or replacement methods for existing wastewater lines. WESTON developed technical specifications for use on this and other ACWP rehabilitation projects. Upon completion of design drawings and specifications for the trenchless rehabilitation locations, WESTON transmitted the plans to the City of Austin for inclusion in a citywide rehabilitation contract. WESTON minimized survey and construction costs by establishing minimum design requirements for open-cut replacement of existing wastewater lines in the same trench.

Clarence Duncan Park Improvements Design-Build, Fulton County Department of Parks and Recreation, Fulton County, GA. WESTON was awarded a Design-Build contract with Fulton County, Georgia’s Parks and Recreation Department to design and construct improvements to Clarence Duncan Park, a public park located in south Fulton County. Improvements focused on: (1) installing 5,700 feet of 8-inch and 12-inch sanitary sewer to eliminate septic systems, pool overflows to surface streams, and nuisance concrete drainage channels; (2) upgrading the existing lake by dredging 25,000 cubic yards of sediment, regrading and vegetating the banks, installing new (primary, secondary, and emergency) impoundment overflows, and fortifying the 500-foot long lake dam; and (3) drainage improvement to improve water quality including adding grassed swales and constructing a wetland in a wet weather detention area.

WESTON’s engineering and design team developed the final design and construction drawings from a 30% design completed by the County. WESTON also performed the geophysical testing of on-site soils from an area on-site and determined these soils were adequate for use in the construction of the dam. In addition, WESTON was responsible for obtaining the necessary permits required for a project of this nature. WESTON addressed the Fulton County’s design, permitting, and cost issues while scheduling work periods not to interfere with peak use hours and emphasizing safety.

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