|• elevation||491 m (1,611 ft)|
|84 m (276 ft)|
|Length||44.1 km (27.4 mi) |
|Basin size||205 km2 (79 sq mi) |
|Progression||Rhine→ North Sea|
The Modau is a 44-kilometre-long (27 mi) right tributary of the river Rhine running through the German state of Hesse. Historically, there have been many watermills on the river and its tributaries, giving rise to the name Mühltal ("Mill Valley"), a district through which the river flows. It passes through Ober-Ramstadt and Pfungstadt, and flows into a branch of the Rhine in Stockstadt am Rhein.
Due to erosion of the river, it was needed to place various stones into the bedload of the river.