Poro, also known as Lower Jug Creek Dam, is a privately owned structure located in Valley, Idaho. Completed in 1947, this earth dam stands at a height of 21.8 feet and serves the primary purpose of irrigation. It has a storage capacity of 59 acre-feet and covers a surface area of 9 acres, with a drainage area of 3.6 square miles.

Managed by the Idaho Department of Water Resources, Poro is state-regulated and regularly inspected to ensure its structural integrity. Despite being classified as having a low hazard potential, the dam's condition is currently assessed as fair. With a maximum discharge capacity of 178 cubic feet per second, this dam plays a crucial role in managing water resources and supporting agricultural activities in the region.

Although Poro does not have a spillway, it is equipped with outlet gates for water control. The risk assessment for this dam is considered high, indicating the importance of ongoing monitoring and maintenance to mitigate any potential dangers. Overall, Poro serves as a key infrastructure for water management in the area, highlighting the intersection of water resources and climate considerations in dam operations.