On November 15, the Provincial People's Committee issued a decision to declare a natural disaster emergency at Keo Pang Lake, Nhac Ky Commune and Na Pia Lake, Bac Hung Commune, Van Lang District.
Accordingly, due to the impact of storm No. 3, at the main dam area of Ho Keo Pang, the downstream slope has been eroded, the upstream slope is deformed and not yet solidified, and the slope coefficient is not uniform.
At the auxiliary dam, the dam roof along the center of the culvert at a position 3m from the water intake culvert has a hole about 50cm in diameter, the sinkhole tends to grow wider.
For Na Pia Lake, the downstream roof on the right side of the water intake culvert shows signs of seepage, subsidence, and swelling. A 0.7m deep, 3m long crack has appeared, and the seepage area on the roof has expanded to about 40m2; the body of the water intake culvert has degraded and leaked, causing unsafety for the dam.
The leaders of the Provincial People's Committee also directed agencies and units, according to their assigned functions and tasks, to carry out disaster recovery activities at Keo Pang Lake, Nhac Ky Commune and Na Pia Lake, Bac Hung Commune, Van Lang District according to regulations.
Previously, due to the influence of storm No. 3, from the night of September 6, scattered showers and thunderstorms appeared in localities in Lang Son province, with moderate to very heavy rain in some places.
Total rainfall of the entire storm No. 3 at the stations is as follows: Bac Son 301.2mm; Dinh Lap 244.2mm; That Khe 175.0mm; Huu Lung 135.8mm; Mau Son 302.4mm; Lang Son 248.7mm. Heavy rains caused flooding and severe damage to crops and people's property.
