Construction Archives - Page 5 of 6

DAF Water Treatment Facility Construction and Startup

Tata & Howard provided construction administration, resident observation, and start-up services to the Milford Water Company for the construction of the Dilla Street DAF Water Treatment Facility. The 5.2 mgd facility treats water from a combination of lake, river, and wells, utilizing dissolved air flotation (DAF) clarifiers and granular activated carbon (GAC) filters. The facility replaced the existing slow-sand and diatomaceous earth (DE) treatment previously utilized to treat the existing surface and groundwater sources, respectively. The facility was required to address and satisfy an Administrative Consent Order (ACO) issued by MassDEP.

Tata & Howard also completed design and oversight of a redundant cast-in-place chlorine contact tank, and has been contracted to provide engineering services for project review and construction oversight for the installation of raw water screens on intakes of both the lake and river sources. These improvements were mandated by MassDEP as part of the approval of the Dilla Street facility design.

Standpipe Rehabilitation, Oak Bluffs, MA

Oak Bluffs Water District, Oak Bluffs, MA

Tata & Howard has provided engineering consulting services for the design, Contract Document preparation, and bid assistance to the Oak Bluffs Water District for the interior and exterior standpipe rehabilitation of the Alpine Avenue Standpipe. We are currently providing construction administration services for the rehabilitation project.

The standpipe has a capacity of 2.0 million gallon and is a welded steel standpipe constructed in 1983. Additional work included removal of a telemetry building attached to the standpipe and design of a precast concrete building to house a tank level transmitter and communications equipment. The standpipe houses cellular carrier equipment and other communications equipment that was considered throughout the design. The Oak Bluffs water system maintains only one water storage tank. To provide adequate storage throughout the completion of the rehabilitation project an interconnection with Edgartown was opened.

Tata & Howard, Inc. coordinated the interconnection opening with the Oak Bluffs Water District, the Edgartown Water Department, and the Massachusetts Department of Environmental Protection. Oak Bluffs is a community that experiences significant demand increases throughout the summer months, therefore there was a very short window for project completion because the limiting weather conditions and increased summer demands. The project is currently on schedule and within budget.

Water Main Improvement and Design, Newton, MA

Newton, MA

Since 2009, Tata & Howard has worked with the City of Newton, Massachusetts on water main improvement projects throughout the water system. In total, the designs have included over seven miles of cleaning and lining and over eight miles of new 8-inch and 12-inch diameter water mains.

Our services have included design, completion of an Opinion of Probable Cost for construction, construction administration and resident observation. Plans were created using available GIS data from the City and field verification. The majority of the work has been funded through MWRA. A recent design included a new 12-inch diameter water main on Washington Street. Work includes cutting concrete panels, backfilling with Controlled Density Fill, and traffic management.

Onsite Wastewater Treatment Facility, Hopkinton, MA

Private Sector — Legacy Farms

Tata & Howard provided design and construction administration services associated with expansion of the Legacy Farms private wastewater treatment facility and effluent disposal areas.

The project assisted in moving from 115,000 gallons per day (gpd) to 190,000 gpd, which consists of the installation of additional membrane cassettes to increase the capacity from 115,000 gpd to 150,000 gpd, installation of additional membrane modules, installation of mechanical equipment fully redundant at a maximum daily flow of 190,000 gpd, permitting assistance with MassDEP, and the construction of two additional effluent disposal areas. Construction of the first of two new effluent disposal areas is underway, and T&H Project Engineer and Certified Soil Evaluator Matt Barry was recently on-site to conduct a perc test for the second effluent disposal area.

Original Project

Tata & Howard provided soil investigation and evaluation, preliminary design, and design services for an onsite wastewater treatment facility and disposal system to serve the proposed Legacy Farms mixed-use development in Hopkinton, Massachusetts.

The Legacy Farms development includes a retail village, a commercial district, a variety of residential spaces (apartments, town homes, single-family homes, and multi-family structures) on approximately 733 acres currently used for nursery and agricultural uses. Approximately 940 new dwellings, 450,000 square feet of retail and commercial space, and 500 acres of restored open space will be made available by the project.

Tata & Howard’s services have included development of treatment flows for the full, built-out project, as well as selection and design of the wastewater pumping treatment and disposal systems that were compatible for the site configuration and soils, and that would provide the level of treatment required by the Massachusetts Department of Environmental Protection (MassDEP). The challenge was satisfied by the design for a phased approach to the construction of a membrane bioreactor (MBR) treatment system, which provides a high level of treatment.

The project includes three submersible pump stations that serve the wastewater treatment facility (influent, recirculation, and effluent disposal) and two submersible pump stations within the development itself.

Disposal of treated effluent at the Legacy Farms site will be managed by a combination of conventional leaching systems and an innovative use of drip irrigation, the first large-scale application of drip irrigation for disposal of treated effluent in the State of Massachusetts.

The success of this project was related to excellent communication between Tata & Howard and the client, and a strong working relationship with MassDEP.

Pump Station Design and Wastewater Treatment Facility Upgrades, Barre, MA

The Town of Barre retained Tata & Howard to evaluate their existing wastewater treatment facility. Tata & Howard recommended a three phase upgrade program in order to reduce the initial impact of the construction cost on the sewer use rates. Included in the upgrade program was the design and construction of a submersible pump station that lifts the raw wastewater from an equalization tank to the biological treatment process. The pump station has a capacity of 1.2 mgd and includes variable frequency drives. The pumping station is controlled by a new SCADA system at the wastewater treatment facility. Tata & Howard also designed 8,000 linear feet of collection system sewers in the Worcester Road area of town. The project also included 500 linear feet of force main and a wet well mounted pump station. The pump station has a capacity of 200 gpm.

Sewer Improvements and Wastewater Pump Stations, Bingham, ME

Tata & Howard provided engineering services associated with sewer improvements including evaluation, design, and construction of 3,500 linear feet of interceptor sewer, 2,500 linear feet of force mains, and three pump stations. In addition, Tata & Howard provided design and construction of 5,000 linear feet of interceptor sewer, 4,000 linear feet of gravity sewer including a river crossing, and a pump station. Tata & Howard also provided design and construction services for three new wastewater pump stations. The pump station scope included upgrading of one pump station and the design of two other pump stations. One of the pump stations is a suction lift station while the other two are submersible stations.

Water Main Replacement, Auburn, MA

Phase I services included engineering services for bid, award, construction administration and resident observation services for approximately 6,500 linear feet of 12-inch water main and 750 linear feet of 8-inch diameter water main for a water main replacement project on Packachoag Street.

Phase II services included engineering design, bid and award, and construction administration and resident observation services for approximately 5,000 linear feet of 8-inch water main. Both phases are funded by the USDA Rural Development program.

Wastewater Pump Stations and Treatment Plant, Canaan, VT

Tata & Howard provided engineering services for the evaluation, permitting, design, and construction of five wastewater pump stations. The pump stations included a new triplex pump station with valve structure. The wastewater treatment plant upgrade was in addition to the pump stations. The other four pump stations consisted of a new, completely relocated pump station and the upgrading of three other dry pit wet pit stations to include generators and controls for telemetry. The pump station design included a plan for maintaining operations of the stations throughout construction, which was completed in the fall of 2014.

Wastewater Treatment Facility, Hopedale, MA

Tata & Howard has been working with the Town of Hopedale, Massachusetts for a number of years on a variety of wastewater collection and treatment projects. When the Town received an administrative order to address copper and ammonia violations at the plant, they turned to Tata & Howard for assistance. We completed the design and construction of a Wastewater Treatment Facility Upgrade project which included the installation of an automated soda ash feed system and an integrated fixed film activated sludge system (IFAS). The IFAS system is an innovative biological treatment process using thousands of special carriers designed to increase total surface area for biofilm growth without expanding the plant’s footprint. The blowers were also modified to provide better control over the aeration process.

A pilot study was conducted to test the ability of various reagents to facilitate the removal of copper from the waste stream. An automated chemical addition system was designed to improve coagulation. Additionally, a dynamic tangential filter was incorporated into the upgrade project. These improvements have allowed the Town to now meet its discharge limits for ammonia and copper.

Water and Wastewater Engineering Services: Hydraulic Modeling, Facilities Plan, WRF Improvements, Goodyear, AZ

Tata & Howard provided water and wastewater engineering services associated with the update of existing water and sewer system models using InfoWater and InfoSewer computer programs; review of the impact of proposed developments and proposed extensions to the City’s systems; verification of the hydraulic models for the City of Goodyear’s water distribution and wastewater collection systems. The water model included fire flow testing, C-value tests and calibration of the InfoWater hydraulic model. The wastewater collection system model included installation of six flow monitoring stations in three sub-basins, calibration of the model, development of a cost allocation model, and preparation of a technical report.

Tata & Howard prepared a facilities plan for the Corgett Water Reclamation Facility. The plan addressed the need for process redundancy and recommended improvements for increased flows and Class A+ effluent. Provided ongoing support services to address operational needs and to assess the impact of new developments on the system. Provided design, bidding, construction administration, resident observation, and construction services associated with improvements to the Corgett WRF including: filter system, low lift pump station, modifications to the sand filter, and instrumentation upgrades.

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Services: Construction