Are dams density-dependent or density-independent limiting factors?

Density-dependant factors-

Factors that basically depend on how much of a population lives in an area.

For instance: Food, if the amount of species goes way up, then the amount of food goes down.

Density-independant factors-

These are factors that affect a population, but are not affected by the population itself.

For instance: Weather, the weather can cause a drought and affect a population, but the growth of the population will not change the weather.