Mayfield Heights staff outline multiple water-main breaks, sinkholes and Marnell sewer project timetable
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Summary
City staff described an active water-main break on Larchmont, 18 current sinkhole/opening locations around the city, recommended sewer lining work by the county, and an ongoing Marnell sewer alignment study with AECOM and a gas-line conflict with Enbridge.
City staff told the Mayfield Heights City Council on Tuesday that the city is managing multiple water-main breaks and sinkholes while coordinating sewer repairs with county crews and engineering consultants.
Joe Cooney (staff) reported a severe water-main break on Larchmont that damaged pavement over roughly a 50-foot length and an estimated 24-foot width; the surface will be restored in concrete for winter repairs, and the service department is soliciting bids for permanent repair with an award expected at a future meeting.
Cooney and another staff member said the city currently has about 18 openings and sinkhole-type repairs around town; crews closed roads as needed and placed barricades. The city is tracking additional breaks as they occur.
County sanitary engineers have inspected lines along Gates Mills Boulevard and ran dye tests and camera (TV) inspections from Cedar to the circle. While the sewer structures were judged largely sound, county staff recommended sewer lining to stop leaks that are causing subsurface erosion and sinkholes. At several locations the county will need to excavate and repair broken pipe sections.
Cooney said the county will also line sections highlighted in TV inspections connected to the Marnell project, including lines down Longwood, Radnor and Temple to Mayfield Road. The county will perform these repairs from its budget while the city coordinates the surface restorations.
Cooney said a draft report from AECOM on the Marnell sewer alignment was received; he is reviewing it and expects to report back to council in two weeks. He also flagged a gas-line conflict with Enbridge (formerly Dominion), which he and project staff will discuss with the company as part of the alignment work. The Marnell sewer work remains scheduled for summer construction; staff cautioned the paving phase could be split into a later project depending on the extent of underground repairs.
Councilmembers asked whether sewer lining and the new test tees installed with the project would address existing public-side problems; staff said the Marnell project will install new test tees and new connections and that identified public-side issues would be addressed as part of that work.
