Progressive Cavity Pump Stations, Ludlow, VT

Okemo Mountain Resort, Ludlow, VT

okemoTata & Howard team members designed two high head progressive cavity pump stations for the Jackson Gore expansion project at Okemo Mountain. Each pump station was designed to fit in with the landscape and each had muffin monster grinders in front of the triplex pump arrangement.  All process piping was stainless steel.

Replacement Wells, Ayer, MA

Grove Pond Replacement Wells No. 1 and No. 2
Grove Pond Well No. 3
Spectacle Pond Replacement Wells No. 1 and No. 2
Department of Public Works, Ayer, Massachusetts

Ayer Grove Pond well replacementTata & Howard has been providing engineering services to the Town of Ayer for their water supply sources.  Our work has included permitting and design of replacement wells at the Grove Pond Well site, development of a new source at the Grove Pond site, and replacement wells at the Spectacle Pond Well site.  Due to elevated concentrations of iron and manganese at both sites, the intent of the replacement well program was to regain lost capacity of the existing sources and reduce the frequency of rehabilitation of the existing sources.  All the replacement wells with the exception the replacement wells at Spectacle Pond Well No. 2 were single gravel packed replacement wells.  Due to Zone I ownership issues, Spectacle Pond Well No. 2 is being replaced with three 16” x 10” gravel packed wells in a wellfield configuration.  Each replacement well project initiated with test well exploratory programs to identify the potential location, yield, and water quality.    With the Spectacle Pond Well No. 2 Replacement Well, we met with MassDEP to discuss the concept, duration of the pump test, and monitoring requirements prior to submittal of the pump test proposal.

Our scope of services for the replacement well and new source projects included test well exploration programs, permitting with the Ayer Conservation Commission and Nature Heritage and Endangered Species Program, MassDevelopment for the Grove Pond Wells, Water Management Act (WMA) program for the third well at Grove Pond, conductance of pump tests, preparation of pump tests reports in accordance with MassDEP requirements, design of the necessary infrastructure and production wells to connect the existing wells to the influent main into the existing respective water treatment facilities, construction and post construction services.

Satellite and Replacement Wells, Shrewsbury, MA

Department of Public Works, Shrewsbury, MA

Shrewsbury Replacement WellsTata & Howard has been providing engineering services to the Town of Shrewsbury for their water supply sources. Our work has included permitting and design of satellite and replacement wells at the Home Farm Wells No. 6-2 and No. 6-4 and the Lambert Replacement Well No. 3-1. The intent of the project was to regain lost capacity of the existing sources.

The approved withdrawal rate from Lambert Well No. 3-1 is 0.75 mgd.  The permitted withdrawal cannot be attained because the existing well screen has failed.  Installation of an 18” x 12” gravel packed replacement well removed the threat of problems associated with the collapsed screen.

The approved withdrawal rate from Home Farm Well No. 6-2 is 3.02 mgd.   Despite rehabilitation efforts, the capacity of Well No. 6-2 has significantly decreased.    An 18” x 12” gravel packed replacement well was constructed and permitted to replace a portion of the flows from the existing Well No. 6-2 to meet the demands of the system and to better manage their sources.  By dividing the approved withdrawal rate of Well No. 6-2 between the existing well and the replacement well, the water velocities will decrease and the efficiency of the wells will increase.

Both replacement well projects required permitting with the Shrewsbury Conservation Commission and MassDEP, preparation of bid documents for the installation of gravel packed production wells and pump test, 24 hour pump test with water quality analysis, preparation of pump test reports, design of necessary infrastructure including submersible pumps, variable frequency drives (VFDs) and piping to connect to the existing water treatment facility.

Service Area Improvements Study; 50-Year Population and Water Use Study; Capital Efficiency Plan™, SCCRWA

South Central Connecticut Regional Water Authority (SCCRWA)

NewHavenCT_town_common_aerialWe have provided engineering services and completed numerous studies for the South Central Regional Water Authority (SCCRWA) headquartered in New Haven, Connecticut, serving 17 Cities and Towns and serving a population of over 400,000 people.  Phase 1 of the New Haven Service Area Improvements Study was completed in 2009.  The purpose of the study was to determine the lowest cost set of recommended capital and operational improvements to incorporate additional service areas into the New Haven Service Area.  Our services included evaluating potential improvements to the distribution system to meet SCCRWA’s pressure, tank fluctuation, and fire flow criteria, and recommending a conceptual baseline solution, which was optimized during Phase 2 of the study.  Phase 3, which completed the study, included a Preliminary Design Report with our final recommendations.

We completed a 50-Year Population and Water Use Study for SCCRWA in 2009.  The study examined trends in water use and population growth in each of the towns and service areas served by SCCRWA and projected future water use for average day, maximum day, and maximum month demand throughout the distribution system.  The projections were completed in accordance with guidelines from the Connecticut Department of Public Health and were involved in SCCRWA’s 2009 water supply plan.

In 2008, SCCRWA purchased a water distribution system with approximately 125 miles of water mains and customers located in Ansonia, Derby and Seymour, Connecticut.  Tata & Howard was contracted to complete a Capital Efficiency Plan™ of the new system.  Our services included updating and verifying the existing hydraulic model, evaluating the condition of the existing distribution system infrastructure to determine the adequacy of meeting present and future demands, calculating needed storage requirements, assess and prioritizing system improvements, reviewing and evaluating typical fire flows throughout the system, creating a pipe asset management rating system, and recommending improvements to the distribution system.  Following the success of this effort, Tata & Howard completed Capital Efficiency Plans for the
remainer of the distribution system in 2011 and 2012.

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.

Unidirectional Flushing Program, Capital Efficiency Plan™, and Water Main Design, Melrose, MA

Unidirectional Flushing
Tata & Howard provided assistance during the City’s unidirectional flushing program.  As part of the work, Tata & Howard recorded the flow from the hydrants, noted any changes in the plan, and noted any defective hydrants or valves.  When completed, a summary report outlining the total usage of water and recommended improvements to the flushing program was provided.

MelroseMAHPWater Mains and Capital Efficiency Plan™
Tata & Howard also provided design and construction services for approximately 5,600 feet of new 8-inch water main and approximately 950 feet of new 12-inch water main throughout the City. Plans were created using available GIS data from the City and field verification. These water mains also included crossing two MWRA transmission mains and crossing the Lynn Fells Parkway. The Lynn Fells Parkway crossing required permitting with the Department of Conservation and Recreation and a traffic management plan. This work was funded through the MWRA. As part of the project, Tata & Howard updated and verified the City’s existing hydraulic model, which has over 80 miles of water main.  Work included two days of fire flow tests throughout the City and allocation of demands using up-to-date billing and parcel data. The locations of the new water mains were selected based on preliminary recommendations identified in the Capital Efficiency Plan™ that was prepared by Tata & Howard. The Capital Efficiency Plan™ identified and prioritized areas for improvement within the distribution system. Our services included evaluating the condition of the existing distribution system infrastructure to determine the adequacy of meeting present and future demands, assessing and prioritizing system improvements, reviewing and evaluating typical fire flows throughout the system, creating a pipe asset management rating system, and recommending improvements to the distribution system.

Download a whitepaper detailing a comprehensive summary of the UDF by clicking the link below:

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Water Audit, Brookline, MA

Department of Public Works, Brookline, MA

brookline water auditPhase I of the water audit, Non-revenue Water Data Collection and Validity Review, for the City of Brookline water system collected and reviewed the validity of the system data.  The results of Phase I were used to assist in completing the water audit.

As part of Phase I, the four master meters recording the flow from the wholesale supplier were visited and visually inspected.  The meters were evaluated to determine if the operating conditions were appropriate for each meter.  It was determined that inspection and calibration of one of the meters was not completed in some time which may be the cause of the high nonrevenue water in the system.

A Data Validity score based on a preliminary review of the system data was calculated.  The score provides a level of confidence in the data provided for an audit.  As part of Phase I, recommendations were provided to increase the Data Validity score and the accuracy of the data for the next phases of the water audit.

Phase II of the Water Audit included preparation of the water audit report and evaluation of the infrastructure leakage index (ILI). The work was conducted using the guidelines outlined by the American Water Works Association (AWWA) in Water Audits and Loss Control Programs, Manual of Water Supply Practices – M36, Third Edition, published in 2009.

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Water Audit, SCCRWA

South Central Connecticut Regional Water Authority (SCCRWA)

Water_meterA water audit was conducted according to the guidelines outlined by the American Water Works Association (AWWA) in Water Audits and Loss Control Programs, Manual of Water Supply Practices – M36, Third Edition. The data reviewed and analyzed included the volume pumped for each source, source meter errors/calibration, the volume of water imported/exported, billed and unbilled consumption, recorded leakage, main breaks, and unauthorized consumption. Key performance indicators, including Infrastructure Leakage Index (ILI) and non-revenue water, were evaluated to track management of the water utility.  Based on the results of the audit, recommendations were made to improve system operation and reduce non-revenue water.  Although the RWA’s non-revenue water water rate was around 15%, the audit confirmed that the RWA’s Infrastructure Leakage Index or ILI was at industry best practice levels, confirming that apparent losses made up the majority of RWA’s water loss.

The recommendations in the audit report included verification of flows at ten production meters, where serious over-reporting of flow was identified.  As a result of this work, two of the production meters were replaced in 2013, including a 54-inch diameter venturi tube at the RWA’s main source.  The audit report also confirmed statistical analysis of customer meter testing that led to a decision to focus meter replacement work on piston-type meters while leaving older but more statistically accurate nutating disc-type meters in service for longer periods.

Water Main and Drainage Pipe, Monson, MA

Pioneer Valley Planning Commission, Monson, MA

MonsonMA_watermain_drainage_pipeThis project included installation of 850 linear feet of 8-inch diameter water main, installation of 450 linear feet of new drainage, sidewalks, and roadway reconstruction on Park Avenue. The work included temporary bypass piping for the duration of the project.  The project was funded by a CDBG grant.

Tata & Howard also provided engineering services for the installation of new 8-inch diameter water mains on Green Street, Lincoln Street, and Squier Avenue.  The project included the installation of drainage pipe and catch basins as well as roadway reconstruction and new sidewalks.  The project was funded by a CDBG Grant.

Water Main Improvement and Design, Newton, MA

Newton, MA

newton_water_mainSince 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.