Business Practice Evaluation (BPE), North Texas Municipal Water District

NTMSD
North Texas Municipal Water District (NTMWD) Wylie Treatment Plant, courtesy of NTMWD

Tata & Howard Provided management consulting and leadership skill building for the North Texas Municipal Water District.  Project included meeting with each of the nine wastewater treatment plant Superintendents and Chief Operators and wastewater collection system management one-on-one as well as meeting with supervisors and managers.  Two briefing workshops were conducted to discuss the findings, overall observations and potential opportunities for improvement that benefits the treatment and collection system facilities.  In addition, a management, operation and maintenance (MOM) workshop was conducted that discussed effective business practices that were compared to industry standards.

 

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CHALLENGE: Prioritizing Water System Improvements with Limited Resources, Mountainaire, AZ

Mountainaire mapCLIENT: Ponderosa Utility Corporation, Arizona

PROJECT: Mountainaire asset management based water distribution system study to assist with prioritizing water system improvements

THE CHALLENGE: Mountainaire is a small water distribution system with limited manpower and revenue resources, and the operation and maintenance of the system is often reactive rather than proactive.

THE SOLUTION:
We successfully helped secure WIFA funding for the completion of the study which provides guidance to the PUC on how the system operates, what improvements are needed for efficient operation and continued maintenance of the system, and a prioritized approach to assist in funding and implementation of projects. This asset management based water distribution system study addresses undersized deteriorating water mains, above grade assets, and the energy efficiency of the pumping system. The study evaluates the system as a whole, based on above grade and below grade assets. Above grade assets are evaluated based on remaining useful life expectancy. Water mains are based on hydraulic capacity, criticality, and risk of failure. A hydraulic model was created for the study.

PROGRESS: Using the findings of the study, we are currently providing engineering services to evaluate flow and pressure requirements for the existing Kiowa Site booster pump station in order to construct a constant pressure pumping system to replace the existing booster pump and hydropnematic tank system that is old and failing.

Capital Efficiency Plan™ including Water System Master Plan, Northampton, MA

City of Northampton, MA 

NorthamptonMA_key_bridgeTata & Howard has completed a Water System Capital Efficiency Plan™ for the City of Northampton.  The plan includes a comprehensive water system master plan that evaluates the hydraulics of the system as well as critical components and asset management considerations.  The hydraulic analysis included completion of fire flow testing and c-factor tests.  Tata & Howard developed a hydraulic model from the City’s extensive ArcGIS database and the flow test results were used in verification.  Tata & Howard reviewed recommended static pressures and Insurance Service Office recommended fire flows as well as estimated needed residential and commercial fire flows throughout the system.  The Northampton water system has wide range of ground elevations, resulting in extreme high and low static pressures in some areas.  To maintain recommended system pressures, a new service zone was recommended to divide the distribution system.  The recommendations included a new water storage tank, pressure reducing valves and transmission main improvements.  Tata & Howard also developed additional recommended water main improvements to meet fire flow needs.

The asset management portion of the project included a detailed analysis of each segment of pipe in the water system based on age, diameter, material, pressure, soil conditions, break history, and potential water hammer.  Each segment of pipe was given a numeric rating based on weighted asset criteria developed in cooperation with the City.  This information was used with the hydraulic evaluation and critical component assessment to determine the prioritized improvements for the system.

Tata & Howard is also assisting the City with testing of pipes throughout the system.  The work includes visual evaluation of samples and pipe strength testing.  An analysis of the estimated service factor of each pipe segment will be provided to the City and used to supplement the information obtained during our asset management analysis.

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.

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 Distribution System Study and Capital Efficiency Plans™

Aquarion Water Company
Areas of service: Oxford, Millbury, Hingham and Hull, MA and Hampton, NH

Aquarion_SuttonAve_Water_TankTata & Howard has been providing general engineering services to the Aquarion Water Company in Massachusetts and New Hampshire for the last five years.  Our work has included the design of water mains and storage tanks, new source development, replacement well designs, hydraulic studies and Capital Efficiency Plans™.  We have completed or are currently completing Capital Efficiency Plans™ for each of the systems in Massachusetts and New Hampshire.  Within the two states, Aquarion Water Company operates a total of approximately 430 miles of water main.  Completion of the Capital Efficiency Plans™ has provided Aquarion with a basis for improvements throughout each of the systems.  The analysis not only reviewed hydraulic considerations but included a detailed analysis of assets and critical components.  By utilizing this approach, Aquarion Water Company was able to spend money effectively on upgrades to the system.  For example, as part of a hydraulic evaluation, it was recommended that Aquarion replace the water main on Mill Road to meet fire flow requirements in the eastern part of the system.  After consideration of the age, material and break history of the surrounding water mains, it was determined that from a capital efficiency standpoint, replacement of the water main on Pine Road would benefit Aquarion more than replacement of the water main on Mill Road.  The water main on Pine Road had reportedly experienced numerous breaks and would eventually require replacement in the near future.  Installation of the water main on Pine Road allowed the Aquarion Water Company to meet the needed fire flow requirement, eliminate a problematic water main, and reduce the overall capital cost.  All the studies included an analysis of the existing supplies versus the estimated future demands as well as storage capacity.  The Hingham/Hull Water Distribution System Study included an analysis of potential water supply sources.  Tata & Howard evaluated the potential of connecting to MWRA, buying water from Cohasset and drilling new wells within the Town.  All options included potential costs for engineering, permitting and construction.

Tata & Howard completed a storage evaluation for the Hingham and Hull water systems.  The purpose of the evaluation was to determine if the Strawberry Hill Tank was needed.  Following a tank inspection, the tank was determined to be structurally deficient and needed substantial work to improve the integrity of the elevated tank.  The Strawberry Hill Tank had a capacity of 0.51 million gallons and had an overflow elevation that was approximately 20 feet lower than the Turkey Hill Tank located in the same service area.  The water in the Strawberry Hill Tank did not fluctuate and caused concern for contaminated water.  Based on a storage evaluation and hydraulic analysis, it was determined that the Strawberry Hill Tank was not needed.  The Aquarion Water Company subsequently removed the tank from the system.