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WWTP Upgrades to Ensure Compliance with Chesapeake Bay NRR - Planning Design and Construction

Planning, design, and construction of upgrades to four Pennsylvania wastewater treatment plants promotes compliance with Chesapeake Bay Nutrient Reduction Regulations.

  • Danville Borough’s Wastewater Treatment Plant - Gannett Fleming

    Gannett Fleming provided planning, design, and construction-phase services to improve Danville Borough’s Wastewater Treatment Plant.

  • Aerial of Abington Regional Wastewater Authority Wastewater Treatment Plant - Gannett Fleming

    Gannett Fleming is designing a major upgrade to Abington’s existing WWTP to enable compliance with NPDES permit regulations.

  • Lewistown Wastewater Treatment Plant - Gannett Fleming

    Gannett Fleming is helping the Borough of Lewistown meet complex and inter-related regulatory requirements and improve its ability to withstand flood conditions.

  • Hampden Township

    Gannett Fleming upgraded the Roth Lane WWTP to meet NDPES requirements, accommodate increased wastewater flows and pollutants, and address operational shortcomings.

Abington Regional Wastewater Authority, Borough of Danville, Borough of Lewistown, and Hampden Township Sewer Authority

Chinchilla, Lackawanna County; Danville, Montour County; Hampden Township, Cumberland County; and Lewistown, Mifflin County, Pennsylvania

Our Role
Design Upgrades, Construction Management, Operations Start-up, Operations Assistance, Financial Studies.

Varies by project
Construction Cost
Ranging from $1.6 million to $3.4 million
2010-In Progress
  • Allowed wastewater entities to comply with NPDES regulations and meet Pennsylvania Chesapeake Bay Tributary Strategy requirements
  • Saved energy costs for wastewater authorities
  • Improved processing of peak wet weather flows
  • Decreased nutrient loads by more than 50 percent
  • Improved treatment to levels lower than cap limits and generated nutrients credits, which can be sold on the market
  • Improved reliability by a wide margin in all plants
  • Improved safety for the public and WWTP employees. 

Pennsylvania contributes more wastewater flow to the Chesapeake Bay than any other area. The government has required all wastewater treatment plants (WWTPs) to implement improved nutrient reduction technologies to mitigate the harmful effects these biological nutrients have on the Chesapeake Bay. Gannett Fleming has collaborated with more than a dozen municipalities in Pennsylvania to upgrade their WWTPs. Our firm works with these entities to ensure compliance with Act 537, National Pollutant Discharge Elimination System (NPDES) permit requirements, the Pennsylvania Chesapeake Bay Tributary Strategy, and other regulations and initiatives. 

To achieve WWTP improvements, Gannett Fleming identifies client needs and concerns, conducts value engineering studies, designs upgrades to processes and facilities, trains authority personnel, and provides construction management services. These services allow our firm to provide a seamless engineering effort from design through final construction and start-up.When designing upgrades, our firm considers ways to reduce up-front construction costs and ongoing operating costs by improving treatment, operations, and energy efficiency. In addition, we assist in securing project funding in the form of grants and low-interest financing. Reduced costs to the wastewater municipalities translates to reduced costs to the public.

What We Did

Since the 1950s, Gannett Fleming has provided services to the Borough of Lewistown, offering full-service capabilities including start-up training sessions, process monitoring and control system (PCMS) programming, and instructional assistance. This long-time client was faced with complex and inter-related regulatory requirements to comply with the Pennsylvania Chesapeake Bay Tributary Strategy by enhancing nutrient removal. The Borough also needed to improve the WWTP’s ability to withstand flood conditions and to hydraulically accept more wet weather flow. Gannett Fleming completed detailed planning and an evaluation of the WWTP and provided construction management. 

Our firm is working with the Abington Regional Wastewater Authority to design a major upgrade to the existing WWTP to enable compliance with the National Pollutant Discharge Elimination System (NPDES) permit requirements for total nitrogen and total phosphorus removal. The planning efforts are the result of unprecedented cooperation among the three tributary municipalities. Following the design phase, we have remained under contract to oversee bid- and construction-phase services, and are meeting very tight schedule restraints and managing site restraints by completing a detailed construction phasing plan to allow continued WWTP operations.

For our long-time client, Hampden Township, Gannett Fleming upgraded the Roth Lane WWTP to meet NDPES requirements in consonance with the goals of the Chesapeake Bay Tributary Strategy, accommodated projected wastewater flows and pollutants from a neighboring borough that requested to tie into the system, and addressed operational shortcomings and process equipment nearing the end of its useful life. The denitrification and carbon feed facilities were sized to provide sufficient biofilm and methanol addition to enhance nutrient removal concentrations to meet current requirements and prospective future limits.

In the Borough of Danville, a client since the 1950s, our firm provided a full spectrum of upgrade services, including planning, design, and construction for improvements to the Borough’s activated sludge WWTP. We successfully maintained operations while replacing very aged equipment, some dating to the 1950s, and met the project schedule despite dealing with a serious flood during construction.

Key Features

  • Reduction of capital and operating costs
  • Compliance with NPDES regulations for biological nutrient removal
  • Compliance with Pennsylvania’s Chesapeake Bay Tributary Strategy
  • Improved processing of peak wet weather flows
  • Enhanced safety for WWTP employees and the public
  • Improved energy efficiency
  • Decrease of nutrient loads by more than 50 percent.

Sustainability Features & Outcomes

  • Reduced energy use and associated costs
  • Improved solids disposal and reduced associated cost
  • Reduced biological nutrients flowing downstream to the Chesapeake Bay.

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