Riehen Pond

The Riehenteich in the canton of Basel-Stadt is an artificial watercourse that diverts approximately 5 m³/s of water from the Wiese River over a distance of 3.8 kilometers; it thus accounts for nearly half of the average water flow of the Wiese. Built in the mid-13th century, the Riehenteich served as a trade canal for various water use interests and emptied into the Rhine. As a technically outdated structure, it was largely decommissioned in two phases between 1907 and 1917. Only a section remains, which has been leading back underground to the Wiese since 1923 to the Riehenteich power plant in the Lange Erlen forest park. The production possibilities associated with the canal led to the development of Kleinbasel as an industrial location in the 19th century.

Wikipedia