Capital Efficiency Plan™ for Manchester-By-The-Sea, MA

Tata & Howard, Inc. was recently retained by the Town of Manchester-by-the-Sea to complete a Capital Efficiency Plan for the Town’s water system.  The system was evaluated to identify areas of the water distribution system in need of rehabilitation, repair, or replacement, and to prioritize improvements to make the most efficient use of the Town’s capital budget.  The study evaluates the existing water infrastructure including water transmission and distribution piping and appurtenances.  In addition, water storage and supply needs were evaluated and prioritized. The analysis and improvements in this report are based on the Three Circles Approach for optimum capital efficiency, which combines hydraulic and critical component considerations with an asset management rating system to evaluate the condition of the water mains in the distribution system.  Each circle represents a unique set of evaluation criteria for each water main segment.  From each set of criteria, system deficiencies are identified.  System deficiencies from each circle are then compared.  Any deficiency that falls into more than one circle is given higher priority than one that does not.  Using the Three Circle Approach, recommended improvements will result in the most benefit to the system.  In addition, the Three Circle Approach allows us to identify any situations that mitigate a deficiency in one circle and eliminate a deficiency in another circle.  By integrating all three sets of criteria, the infrastructure improvement decision making process and overall capital efficiency are optimized.

Recommendations included a siting study for a second storage tank, Phase I-III distribution system improvements, and the continuance of scheduled maintenance programs such as hydrant flushing, leak detection, and meter testing. The Town’s pavement management plan was also taken into consideration to best prioritize and coordinate utility work with roadway reconstruction.

 

SaveSave

SaveSave

Capital Efficiency Plan™ and Water Supply Study in Rowley, MA

A Capital Efficiency Plan was completed for the Town of Rowley in May 2017.  The study evaluated the 45 miles of the Town’s water distribution system using the Three Circles Approach, which consists of a system hydraulic evaluation, criticality component assessment, and asset management considerations.  From each set of criteria, system deficiencies were identified and a 20-year recommended improvements plan was provided.  Recommended improvements consisted of water main replacement projects, a pumping capacity evaluation and well redevelopment study, an interconnection analysis, and a distribution static pressure evaluation.

 

Capital Efficiency Plan™ for Avon, MA

Page Street Tank

Tata & Howard recently completed a Capital Efficiency Plan™ for the Town of Avon, MA.  As part of the project, Tata & Howard updated and verified the Town’s existing hydraulic model.  The work included the completion of fire flow tests throughout the Town and allocation of demands using up-to-date billing and parcel data.  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. Recommendations included installation of two replacement wells, conducting an interconnection study, rehabilitation of the Page Street Tank, and phased distribution system improvements.

The hydraulic model was also verified under an Extended Period Simulation (EPS), which considers changes in the distribution system over time.  The EPS will be used to evaluate tank operating ranges and modifications to the well operating conditions.

 

Capital Efficiency Plan™ for Norwalk, CT First Taxing District

Tata & Howard, Inc. was retained by the First District Water Department (FDWD) to complete a Capital Efficiency Plan for the First District water system in the City of Norwalk, CT.  Areas of the water distribution system in need of rehabilitation, repair, or replacement, were identified and improvements were prioritized to make the most efficient use of the FDWD’s capital budget. The study evaluated the existing water infrastructure including water transmission and distribution piping and appurtenances.  In addition, water storage needs were evaluated and prioritized.

Tata & Howard evaluated the water distribution system using the Three Circle Approach, which consists of evaluation criteria including a system hydraulic evaluation, a critical component assessment, and asset management considerations.

Hydraulic improvements included recommendations that would strengthen the transmission capabilities of the system or provide an ISO recommended fire flow to a certain area.  Priority 2 recommendations were identified as part of a system-wide evaluation to improve estimated needed fire flows and system looping.

A critical component assessment was performed for the water distribution system to evaluate the impact of potential water main failures on the system.  The critical component assessment includes identification of critical areas served, critical water mains, and the need for redundant mains.  Critical areas served were identified by the FDWD and include water department facilities, medical facilities, schools, and business districts.  Critical water mains include primary transmission lines as well as water mains that cross over major highways, rivers, and railroad tracks. Factors that affected the decision to replace or rehabilitate a water main include break history, material, age, diameter, soil conditions, water quality, and pressure.

An asset management assessment was completed for the system.  A number of factors are considered in the ratings including break history, material, age, diameter, soil conditions, water quality, and pressure, and these factors affect the decision to replace or rehabilitate a water main.

Utilizing the Three Circle Approach, improvements were recommended and prioritized based on the aforementioned criteria.  Phase I improvements include any recommended improvements that fall into all three circles and are therefore hydraulically deficient, critical, and have a high asset management score.  There are approximately 16,300 linear feet of new main in the Phase I recommended improvements.  Phase II improvements include any recommended improvements that fall into two of the circles.  There are approximately 81,400 linear feet of new main in the Phase IIa and Phase IIb recommended improvements. Phase III recommendations include any recommended improvements that are needed hydraulically or that have a high asset management score indicating poor condition.  The Phase IIIa and Phase IIIb include approximately 157,000 linear feet of new main.  In addition, recommendations included soil testing for corrosivity prior to ductile water main installation, implementation of a unidirectional flushing program, and annual updating of the hydraulic model.

Capital Efficiency Plan™ and Water System Master Plan, Attleboro, MA

Tata & Howard, Inc. was retained by the City of Attleboro to complete a Capital Efficiency Plan and Water System Master Plan for the Attleboro water system.  The purpose of the Capital Efficiency Plan portion of the project was to identify areas of the water distribution system in need of rehabilitation, repair, or replacement, and to prioritize improvements to make the most efficient use of the City’s capital budget.  The Water System Master Plan portion of the project created an inventory of the existing above ground water infrastructure assets including wells, pumping and treatment facilities, and water storage tanks.  The inventory can be used to track maintenance, repair, and replacement work.  Basin safe yields were reviewed and compared to projected demands to evaluate the adequacy of sources of supply. In addition, the project included creation of an extended period simulation (EPS) hydraulic model which can be used to analyze the system and account for changes over time.

An asset management assessment was completed for the system.  Several factors are considered in the assessment including age, material, diameter, break history, soil conditions, water quality, pressure, and whether the main was installed poorly.  These factors affect the decision to replace or rehabilitate a water main.  Using our asset management rating approach, each water main in the system was assigned a rating based on these factors. Utilizing the Three Circles Approach, improvements were recommended and prioritized based on the aforementioned criteria. Recommended improvements include the following:

  • Three phases of water main replacement projects;
  • A Water Quality and System Optimization Study to evaluate ways the City can lower the water age in the storage tank;
  • A study to evaluate improvements to maximize available yield;
  • Collection and maintenance of data on water main failures as well as pipe crushing results from water mains that have failed;
  • Testing of soil for corrosivity prior to installation of new ductile iron water mains;
  • Implementation of a Unidirectional Flushing Program; and
  • Minor repairs and security improvements to address deficiencies in the City’s above ground assets.

SaveSave

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.

 

SaveSave

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:

download