Employee installed Leach Tank #3 lid section to fit into place. The lid was stuck causing employee to push lid with right leg causing overexertion of their knee. Employee did not notice any pain at that point in time. They reported the incident on 7-10-2023. Doctor recommended Physical therapy on 07/18/2023 to have done. Physical therapy will start on 7-21-2023 @ 4:00 PM.