NR-1 Sinkhole NR-1 Sinkhole The NR-1 Sinkhole is a giant underwater sinkhole located in the Straits of Florida southwest of Key West, Florida. It is found at an approximate depth of of water at the foot of the Pourtales Escarpment, an area of Quaternary sediment. It was discovered in October 1994 during a survey conducted by the American submarine NR-1, a U.S. Navy nuclear research submarine, and is named for the submarine. It was first identified via side-scan sonar and near-bottom echo sounder data, prompting a second survey in May 1995 to confirm the finding. Discovery of the NR-1 Sinkhole prompted scientific
Bayou Corne sinkhole Oxy3 had begun to cave in. Louisiana Governor Bobby Jindal issued an evacuation order on August 3, 2012 after residents reported smells of crude oil throughout the town. Texas Brine investigated the situation by drilling a relief well and found that the outer wall of the salt dome had collapsed, allowing sediment to pour into the cavern and oil and gas to escape to the surface, causing the shaking and bubbles residents had observed. When first the sinkhole appeared, it spanned a hectare (2.5 acres). As of late February 2014, the sinkhole is 26 acres and growing. Texas Brine is