CEDICT
dam (structure placed across a flowing body of water to stop the flow) (Classifier: 條/条 m; 座 m)
Wiktionary
横亘于河川上的阻水建筑。用来集水以供农业灌溉、民生给水、水力发电等,亦有防洪及改善航运的功能。
重編國語辭典
classifier: 條
The bank secured the city from a flood.
Source: Tatoeba