Dams are watertight structures that are either man-made or occur in nature. They are built so water doesn't escape downstream.
a dam
There is no standard collective noun for 'ewes', however the collective nouns for sheep can be used:a down of ewesa drift of ewesa drove of ewesa flock of ewesa fold of ewesa herd of ewesa hurtle of ewesa mob of ewesa parcel of ewesa trip of ewesa wing of ewesAnd, there are no standard collective nouns for 'does', in which case the collective nouns for deer can be used:a bunch of doesa gang of doesa herd of doesa leash of doesa mob of doesa parcel of doesa rangale of does
Animalia
12 of them
doesa it eat anything ?
A township
yes it does
A decagon has ten sides.
Bullets
krill
It means she/he/you (formal) gave.
The dam was created from a joint effort from the Brazilian and Paraguayan governments. An agreement was signed on July 22, 1966 to study the construction. Work on the dam began in 1970.