Workers fill in a sinkhole after they repaired a second abandoned lateral sewer line and reinforced the area beneath Wyoming Avenue in Kingston on Tuesday. The work required daylong single-lane restrictions near the Pierce Street intersection. Municipal Administrator Paul Keating said oak plugs on two abandoned terracotta laterals had rotted, causing dirt to get into those lines and 12-inch and 24-inch main sewer lines. That led the soil and rock beneath the road surface to sink, causing the sinkhole. One of the laterals was repaired on Friday. Both laterals, about 14 feet apart, were permanently plugged and reinforced with concrete, Keating said.