Effective:
Both states depend on access to the water provided by the dam.
It will be financially beneficial to both states to share access to the dam.
One of the two states has very few water reservoirs.
The dam lies on the border of the two states and should, therefore, be shared.
Ineffective:
The governors of both states are good friends.
The dam water is not as pure as water from reservoirs.
~Sarah Robinsen