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40 The Authority | June 2024 1997 Upgrade 2013 Upgrade Chambersburg article continued from page 13. The resulting extensive scope included upgrades to all facets of the treatment process with an emphasis on being cost effective, energy efficient, and environmentally sensitive. • 1978 Upgrade: The J. Hase Mowrey Regional Wastewater Treatment Facility was dedicated on November 16, 1980. The Borough upgraded the facility to a capacity of 5.2 mgd, at a cost of $9.045 million (unlike today, the Borough was able to fund 75% of the cost through a grant). • 1997 Upgrade: Upgrades were completed in July 1999 at a cost of $18.5 million. Engineers indicated that the Plant capacity was 6.8 mgd, with a maximum capacity of 17.0 mgd. • 2013 Upgrade: Upgrades were completed on March 31, 2017 at a cost of $39.9 million. Plant capacity is rated at 11.28 mgd, with a maximum monthly capacity of 14.66 mgd. Additionally, the treatment plant has evolved into a regional facility providing sewage treatment to three of our municipal partners in Greene, Guilford, and Hamilton Townships. Hamilton Township initially provided connections in 1972. Through an expansion of the conveyance system in the 1970’s, the remaining townships ultimately connected to the system in 1980. The Largest Public Works Project in the History of the Borough of Chambersburg Prior to 2013, Chambersburg’s 6.8 mgd, J. Hase Mowrey Regional Wastewater Treatment Plant served Chambersburg, Greene Township, Guilford Township, Hamilton Township and indirectly part of Letterkenny Township. In addition to the Commonwealth’s 2008 Chesapeake Bay Tributary Strategy, which forced a cap on the amount of nitrogen and phosphorus discharged from the facility, Chambersburg was also facing the demand of building additional capacity (a 60% increase) to meet projected 20-year build out in the service region, as required by DEP’s Act 537 Plan Study. These two mandates initially resulted in proposed facility renovations with an estimated price tag of over $50 million. The existing treatment facilities at the Chambersburg plant were not able to meet the pending nutrient discharge limits. Therefore, the municipal partners needed to upgrade the facility to meet the nitrogen and phosphorus caps. In addition to meeting these caps, the partners needed an expansion from 6.8 mgd to 11.28 mgd to accommodate the anticipated growth from regional development within the service area. The facilities must be able to convey a total influent peak flow of 33.5 mgd based upon analysis of the Borough’s collection and conveyance system. The resulting extensive scope included upgrades to all facets of the treatment process with an emphasis on being cost effective, energy efficient, and environmentally sensitive. Key project components included: • A new headworks and influent pump station to replace the existing deficient facilities. Engineers designed a size of 33.5 mgd of influent flow, and all internal conveyance infrastructures capable of passing flows that are associated with this instantaneous peak as well throughout the plant. • PA DEP established discharge limits necessitating an improved biological treatment process to provide nutrient (nitrogen and