Upper Rhine (Mainz–Basel)
Held by locks · Mainz (Rhine-km 498) – Basel (Rhine-km 167)
109 of the 181 sailings that call at Basel travel this stretch of river.
The gauge that governs this stretch of river is at Maxau.
Maxau Rhine
321 cm falling 7 centimetres over 72 hours falling 7 cm over 72 hours
low on mean low/high water (MNW/MHW) · normal on navigational reference levels (NSW/HSW) — the publisher's own classification of its own reading.
299 cm below the 620 cm first high-water mark (speed and wash limits, and the room under the bridges starts to run out).