31. They are obstructing the department's concrete lining plan for the upstream stretch between the PWD's bridge and Bukit Belacan. 32. After a concrete lining sealed the shafts, the cooling brine was stopped and the frozen ground allowed to thaw. 33. Large chunks of concrete lining fell from the ceiling and the walls of the four-mile tunnel, complicating rescue efforts. 34. The cutting of the tunnel had intersected these faults and allowed the gas to seep in through its concrete lining . 35. When the concrete lining of Brays was completed in the 1960s, the bayou was designed to hold a 15-inch rainfall. 36. It diverts water into a concrete lined canal on the right flank with a capacity of 40 m?/ s. 37. Large chunks of the tunnel's concrete lining fell from the ceiling and the walls of the tunnel, complicating rescue efforts. 38. A fully lined pit latrine has concrete lining also at the base so that no liquids infiltrate into the ground. 39. Eleven giant boring machines, guided by satellites, dug the passages from December 1987 to mid-1991, laying concrete lining behind them. 40. In the 1990s the refinery site was chosen for a purpose-built facility to make concrete lining segments for the Channel Tunnel.
