On October 30, speaking with Giao thong Newspaper reporter, Mr. Lo Van Hoa (a resident living near Tay Trang VII quarry) said that at around 6:30 p.m. on October 29, many rocks from the quarry fell from above onto National Highway 279, causing traffic safety problems and danger to people and vehicles passing by.

According to Mr. Hoa, earlier on October 28, the Tay Trang VII quarry also exploded, causing rocks to fall onto the road at Km 105+200. Afterwards, workers used excavators to move the rocks off the highway. "I really hope that the authorities will soon take measures to thoroughly handle the above situation so that people can safely participate in traffic," he said.

The above quarry is under the management of Nam Nhe 2A Company, the investor.

Giao thong newspaper has reflected people's opinions to the company.

Mr. Bui Anh Tuan, General Director of Nam Nhe 2A Company confirmed: "On October 28, the company exploded and rock fell, and on October 29, it was due to rock falling on Highway 279. The mine site has been provided with complete documents, mine diagrams, and safe distances between mining locations."

Regarding the distance between the quarry and the road, according to the reporter's records, the only entrance to Tay Trang VII quarry is directly connected to Highway 279 right at the curve and slope. About 150m away is the entrance to the quarry and the finished product processing area serving the Dien Bien cement factory. This section has the potential to cause traffic safety risks because the above location is located halfway up the slope, out of sight, and many sections of rock have fallen onto the road.

Regarding this issue, Mr. Tran Quang Huy, Deputy Director of Road Joint Stock Company 226, the unit managing Highway 279, said: "The company has not received any procedures related to the request for permission to connect to Highway 279 from the Tay Trang VII mine. Not only is the connection procedure lacking, both mines have not yet installed a load weighing station. Notably, trucks carrying rocks from the mine also spill materials, causing many locations on Highway 279 to deteriorate, potentially posing a high risk of traffic safety loss."

Tay Trang VII quarry in Na U commune is located next to Highway 279 connecting Tay Trang International Border Gate to Dien Bien Phu City. This quarry was previously discovered to be operating outside the licensed area.

Currently, the regulations on safe distances for blasting and storage of explosives are not guaranteed because according to the records, the furthest landmark of this mine is 350m, the closest is 110m, while the minimum safe distance for people is 300m and for surrounding construction equipment is 200m.