![Subheader | Low Impact Hydropower Subheader Image](https://lowimpacthydro.org/wp-content/uploads/2021/02/3-scaled.jpg)
Exemption
April 11, 2022![Subheader | Low Impact Hydropower Subheader Image](https://lowimpacthydro.org/wp-content/uploads/2021/02/3-scaled.jpg)
Roller Compacted Concrete Dam
April 11, 2022An embankment dam in which more than 50% of the total volume is comprised of compacted or dumped cobbles, boulders, rock fragments, or quarried rock generally larger than 3-inch size.