Forcier Aldrich & Associates

American Council of Engineering Companies

2004 Engineering Excellence Grand Award

CATEGORY F - STUDIES PLANNING, CONSULTING ENGINEERING SERVICES

WATER FACILITIES PLAN
SOUTH BURLINGTON, VERMONT

PROJECT HIGHLIGHTS
  • Gathered and reviewed existing data and records for “High Service” area in South Burlington, VT.
  • Developed design criteria by updating preliminary study based on water usage data, fire flow needs and coordination with CWD 20 year master plan.
  • Worked with city planning and zoning staff to determine future water demands based on population growth projections.
  • Determined minimum required volume for expansion of existing tank and/or addition of new distribution storage tank.
  • Evaluated several alternatives for main service area and high service area.
  • Provided hydraulic analysis and computer modeling of each of the alternatives by adding each to the existing CWD computer modeling.
  • Developed a recommended plan presented in multiple phases with estimated costs and funding sources.
  • Prepared a comprehensive report to be presented to the City of South Burlington and CWD.
  • Recommended plan included phased approach:
    • Providing new second 500,000 gallon tank at Allen Road.
    • Raising Dorset Street tank to increase the capacity from 1,500,000 gallons to 2,100,000 gallons at a higher hydraulic grade line.
    • New transmission and distribution mains for the high service area.
  • Key criteria in recommended plan:
    • Extended services to areas with higher ground elevations while maintaining minimum pressures in existing areas.
    • Limited height of vertical expansion of existing Dorset Street tank.
    • Improved fire flows and overall redundancy throughout service area.
    • Considered types of water storage tanks suitable for the site.
    • Considered the impact of “water turnover” and how best practice helped to comply with the Disinfection By-Products Rule.
    • Determined needs for additional transmission main and distribution improvements.
    • Considered changes in system operation from the existing 24" CWD transmission main.
    • Incorporated a hydraulic analysis with future improvements considering a 20 year buildout.
    • Determined the most cost effective solution meeting all of the above criteria.
  • Special Features:
    • Provides infrastructure support for future growth in South Burlington.
    • Accommodates future phases for next 50 years with additional loops and redundancy, considering pipe sizes.
    • Serves as a comprehensive infrastructure planning document.
    • Took into account credits for CWD supply for fire flow demands, therefore reducing storage requirements.
    • Met aesthetic concerns by co-locating tanks or raising tanks.
 
Photo and award plaque

 
 

 
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