Upper Rhine (Mainz–Basel)
Held by locks · Mainz (Rhine-km 498) – Basel (Rhine-km 167)
180 of the 180 sailings that call at Breisach travel this stretch of river.
The gauge that governs this stretch of river is at Maxau.
Maxau Rhine
283 cm falling 5 centimetres over 72 hours falling 5 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.
337 cm below the 620 cm first high-water mark (speed and wash limits, and the room under the bridges starts to run out).