Wastewater Treatment Facility Upgrade – Brattleboro

Brattleboro, Vermont

Client: Town of Brattleboro, Vermont


  • New Building Design
  • Special Inspections

Project Summary

The Town of Brattleboro, Vermont is uniquely located as the “gateway to Vermont”, welcoming visitors from Massachusetts, New York and beyond to the beauty of the region. The agricultural history of Vermont has developed into unique rural industries and Brattleboro is poised to be at the center of this ongoing development.

To meet the growing needs of the Town, an upgrade of the 1960’s era wastewater treatment facility (WWTF) was imperative. Hoyle, Tanner provided conceptual and final design, and construction engineering services for this comprehensive WWTF upgrade project, including a new Headworks facility with equipment, new primary clarifiers, moving bed biological reactor (MBBR), new secondary clarifier equipment, replacement of the rotating biological contactors (RBCs) and disinfection upgrades. The design included a new innovative thermophilic-mesophilic sludge digestion process with automatic process control system to ease operability. This system was designed to produce Class A biosolids to reduce landfill tipping fee costs. Improvements also were designed to generate heat and electrical power using a biogas-fueled microturbine generator. The design also features an innovative reuse of an existing settling tank retrofit as three new process tanks, and a pump gallery, as well as reuse of existing piles for a new thermophilic digester tank.

Hoyle, Tanner fast-tracked the design of the new RBCs as a separate phase of this upgrade in order to maintain eligibility for Federal stimulus funding, resulting in a $1 Million grant. We also worked to make applications to several other grant programs and helped secure grant and funding support from the State of Vermont’s Clean Energy Development Fund and State Revolving Loan program.  Hoyle, Tanner completed a detailed analysis of the Town’s user rate structure and helped develop a new rate structure and financing strategy that was adopted by the Selectboard. Hoyle, Tanner also provided public outreach services to inform and educate the voters who ultimately approved the project with a 90% majority vote.

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