1.   As dark fell, I walked along the dam wall.

2.   Dam construction brought the spectacle of enormous schools of L alewives slamming themselves L against dam walls again and L again.

3.   Dam construction brought the spectacle of enormous schools of alewives slamming themselves against dam walls again and again.

4.   That accident occurred when a dam wall collapsed at a Harmony Gold Mining Ltd. mine in the Free State.

5.   The biggest challenge for the dams is the buildup of silt behind the dam walls and inside the turbines.

6.   Earlier police reported that a section of the dam wall had given way, but an inspection later showed it was still in tact.

7.   He said farmers in the district, widely occupied by militants, poured cement into their wells and smashed down dam walls, the official Zimbabwe News Agency reported.

8.   Mounting pressure on the dam wall risked cracking its supports and even collapsing the wall, Deputy Energy Minister Celesto Chibamba said Tuesday.