After permits have been secured from the Department of Environmental Protection and the Pennsylvania Fish and Boat Commission, the board of supervisors or its agents or employes may widen and deepen watercourses running through the township and erect dikes, retaining walls and embankments along the watercourses as are necessary to prevent water from overflowing the banks. For these purposes, townships may enter and condemn property as may be necessary. Townships may enter land lying near the watercourses and secure materials as may be necessary in connection with the work. Damages for property taken, injured or destroyed as the result of the work shall be determined under this act.