Overview

• Local accounts confirm the Ammer peaked at 4.78 meters in Weilheim on the evening of August 23, 2005, with 364 centimeters recorded at the Peißenberg gauge.
• Floodwaters shut the Munich–Garmisch rail line and parts of the Pfaffenwinkelbahn, replacement buses were soon halted by road closures, and E.ON cut substations, triggering hours‑long outages.
• At the height of the response, 250 to 300 personnel from fire brigades, THW, Johanniter and the BRK deployed tens of thousands of sandbags, narrowly preventing a sewage‑plant shutdown.
• Damage ranged from the heavily hit Kalkofensteg footbridge to an evacuation at the ‘Allegra’ horse stable, followed by rapid repairs and volunteer clean‑ups.
• Since 2005, the Wasserwirtschaftsamt Weilheim reports 11 retention basins and 22 other measures worth about €23.6 million in the district, alongside major Sylvenstein and Lech‑area upgrades that expanded buffer capacity and reinforced protections.