Hochwasserrückhaltebecken Straußfurt, Flood retention basin in Straußfurt, Germany.

The Hochwasserrückhaltebecken Straußfurt is a water storage facility designed to capture and manage water during heavy rainfall periods. The basin has multiple spillways and control outlets that distribute water flow in a regulated manner when flood conditions occur.

The earth dam was built at the end of the 1960s as a "green basin" that held back the Unstrut only during floods. Its water-side sealing body is made of Keuper marl, its air-side support body of gravel, and the water side is covered with an asphalt concrete layer. The dam has a 91 m long concrete relief structure; the flood discharge consists of a 270 m long slope overflow with a 200 m long channel. The basin is operated by the Thüringer Fernwasserversorgung.

The dam's water-side sealing body is made of Keuper marl, a local clay-rich rock, while the air side is gravel; an asphalt concrete layer covers the water side. The 91 m concrete relief structure and a 270 m hillside overflow with a 200 m channel handle flood discharge. The basin is operated by the Thüringer Fernwasserversorgung.

The basin is an open area that fills with water during flooding but remains dry or partially filled at other times. Visitors should respect safety guidelines and avoid the site during or immediately after heavy rainfall.

The basin was raised by one meter in 2021 and can now hold approximately 10 million cubic meters of additional water. This expansion significantly improves flood protection for surrounding communities.