SUBWAY BLAMED FOR FALLEN RIVER.Byline: Eric Moses Daily News Staff Writer Concerned that Red Line subway tunneling has caused a section of the Los Angeles River The Los Angeles River is an intermittent river flowing through Los Angeles County, California, from Canoga Park in the west end of the San Fernando Valley, 51 miles (82 km) southeast to its mouth in Long Beach. to sink, public works public works pl.n. Construction projects, such as highways or dams, financed by public funds and constructed by a government for the benefit or use of the general public. Noun 1. engineers said Wednesday they are asking the MTA (1) (Message Transfer Agent or Mail Transfer Agent) The store and forward part of a messaging system. See messaging system. (2) See M Technology Association. 1. (messaging) MTA - Message Transfer Agent. to make repairs. Parts of the channel have fallen as much as 2.5 inches, which is more than can be accepted, said Lance Grindle, head of flood control permits for the county. A closer investigation will determine whether a gap has opened beneath the concrete-lined river, Grindle said. ``It may just be subsidence subsidence, lowering of a portion of the earth's crust. The subsidence of land areas over time has resulted in submergence by shallow seas (see oceans). Land subsidence can occur naturally or through human activity. from where the tunnel went through,'' Grindle said, adding, however, ``It could become a problem. It could become a sinkhole sinkhole or sink or doline Depression formed as underlying limestone bedrock is dissolved by groundwater. Sinkholes vary greatly in area and depth and may be very large. if you got water in there. That is what they should investigate, and we will ask them to investigate.'' Metropolitan Transportation Authority officials said the depression has been at 2 inches for the last half year a depth they asserted that was within an acceptable limit. ``We do not know what has caused this,'' said MTA spokesman Gary Wosk. ``There is no sinkhole.'' In April 1996, Caltrans temporarily shut down subway work when the Hollywood Freeway sank 3.79 inches near Lankershim Boulevard - exceeding a permit allowing no more than 3.5 inches of sinkage sink·age n. 1. The process, amount, or degree of sinking. 2. A sunken area; a depression. . Engineers with Parsons-Dillingham, the construction manager for the Metro Red Line extension to North Hollywood, inspected the area, about 120 feet west of Lankershim Boulevard, on Tuesday and Wednesday, Wosk said. One is where swirling ripples are apparently caused by water flowing over a joint that is missing tar filler. The other is the settled section the county is worried about. As part of its tunneling permit, the MTA had to monitor the channel for settlement every day during tunneling and every three months afterward. |
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