A cofferdam is a temporary structure built within a body of water to create a dry work environment for construction or repair activities. Typically made of steel sheet piles or concrete walls, a cofferdam is designed to prevent water from entering the enclosed area, allowing workers to excavate, build foundations, or conduct other tasks below the waterline. The construction of a cofferdam involves driving piles into the ground to create a watertight enclosure, often requiring dewatering pumps to remove any seepage that may occur.Cofferdams are commonly used in bridge construction, pipeline installation, and other projects that require working in or near bodies of water. They provide a safe and efficient way to carry out construction activities in wet conditions, allowing