Tuhnický jez, Weir on the Ohře River, Karlovy Vary, Czechia

Tuhnicky Weir is a small water barrier on the Ohre River in Karlovy Vary, standing about 0.6 meters high. The site features a sports gate with minor turbulence and a fish passage, allowing kayaks and boats to either run the weir or portage along the gentle slope beside it.

The weir was originally built as an aid for water management and flood protection. In 2010, it underwent complete reconstruction and the slope was reshaped to a gentler profile to make it safer for paddlers.

The best passage is through the left side via the sports gate, especially at lower water levels and for beginners. Wear water-resistant clothing and check local conditions, as water flow varies by season.

Before the 2010 rebuild, the weir was nicknamed "Jez smrti" (Weir of Death): a roller formed below it at high water, and by the time of a 2006 Aktuálně.cz article more than 10 people had drowned there, including would-be rescuers who fell in. Rescue rings on ropes were hung on both banks after those accidents.