The dam threatened to break now; and yet it did not break.

The dam threatens the local ecosystem and therefore the economic basis of the local Himba ethnic group.

An inspector found fault with how the council filled the dam and the National Oceanic and Atmospheric Administration threatened to fine them.

A blown dam threatens our entire power grid.

Environmentalists claimed that the dam raised silt levels and threatened the ecosystem of a two-centimeter-long variety of tadpole.

Negotiations are stalled, and now the dams threaten to reduce the supply downstream.

The result is that even though Americans now build few dams, more and more dams threaten people's lives.

The plan had been opposed by environmental and recreation groups, who contended that the dam threatened an effort to reintroduce Atlantic salmon to the river.

The dams will affect the minimum ecological flows and threaten the fishing, wilderness-tourism and agricultural interests along the river.

In October 2005, the site gained national attention when the mill's 1832 wooden dam threatened to collapse after heavy rains.