Havran Dam
The 928th tallest dam in the world
Havran Dam is a dam in the agricultural province of Balıkesir, Turkey. The development was backed by the Turkish State Hydraulic Works. A large cave located in the dam reservoir was home to 15–20,000 bats, making it the second largest such colony in the country. Because these creatures are important to the local agriculture, the pumping operation for the dam was delayed until April, 2008 when the bats ended their hibernation.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).