In the last quarter of the 18th century, a unique system for timber floating was built in the region of Nové Hrady. Its creation is linked to the name of the then owner of the Nové Hrady Estate, Johann Nepomuk Buquoy, while the project and its implementation were designed and overseen by engineer Johann Franz Riemer. The uniqueness of the system lay in the fact that it allowed the floating of both loose timber (logs) and bound timber (rafts), even on the narrow and low-capacity streams of the Novohradské hory (Gratzen Mountains). The basis of the navigation system was formed by modified (navigable) watercourses, on which there were reservoirs (ponds) ensuring the necessary amount of water for floating timber. The beginnings of the construction of the navigation system date back to the second half of the 1770s. Materials preserved in the archival records of the Nové Hrady Estate provide insight into the beginnings of the waterway construction in 1780–1784. In 1783, the first part of the construction of the navigation system was completed. From that year on, logs were transported to České Budějovice and the first rafts to Prague. In the section to České Budějovice, the waterway included the Pohořský stream, which con-nects to the Černá and Malše rivers. After 1783, the expansion of the navigation system continued to the upper reaches of the Černá river and its tributaries. The navigation system was completed at the turn of the 18th and 19th centuries by making smaller tributaries of the Černá river navigable and with the construction of reservoirs on those streams. The navigation system was maintained and operated until the first half of the 1940s.
