Van Lang Bridge, which connects Hanoi's Ba Vi District with Phu Tho Province over the Red River, has revealed its foundation by 50 cm.
The situation is also attributed to sand over-exploitation on the river bed.
The river bed has been narrowed by half.
Trung Ha Bridge, spanning the Da River, also faces the same situation.
The Da River supplies water for over one million people in Hanoi City. When the water reached record lows in 2023, the Song Da Water Investment Joint Stock Company had to install a pumping system directly on the river bed.
Lying some 17 km from Trung Ha Bridge, Dong Quang Bridge has also shown its foundation on the drying Da River.