Timeline of compliance efforts

The City of Rochester provided a timeline of events, beginning in 2009, of efforts to bring the reservoirs into compliance with the LT2 requirements. The timeline begins with the bilateral compliance agreement between the city and the state and county health departments, which required additional sampling for cryptosporidium.

● The original compliance date was October 2014 for Highland Park and November 2013 for Cobb’s Hill; in 2012 the compliance agreement was extended to 2023 and 2024 for Highland Park and Cobb’s Hill, respectively.

● In 2012, Rush Reservoir is covered with a floating synthetic rubber cover, meeting the compliance deadline for the reservoir without public access.

● In 2018, Bergmann Associates, now rebranded as Colliers Engineering and Design, is contracted to re-evaluate options and conceptual designs to bring Highland Park Reservoir into compliance with LT2. The study is halted in 2020 for a corrosion control study to align with new lead regulations.

● In 2021, the bilateral compliance agreement is revised, giving the city time to complete corrosion study and determine if orthophosphate is required to control lead. The compliance dates are pushed out to November 2029 for Highland Park Reservoir and November 2035 for Cobb’s Hill Reservoir.

● Also in 2021, the city entered an agreement with Ramboll/CDM Smith for the corrosion control treatment study and remains in the testing phase, expected to take 18 months to complete.

● This year, the city entered an agreement with Colliers Engineering and Design to re-evaluate options and bring the Highland Park Reservoir into compliance with LT2 and the Lead and Copper Rule revisions.