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Former ammunition depot, Mitholz

Location
Mitholz, BE
Execution period
August 2023 bis Juni 2025
Client
Arma Suisse
Drillings
60 pieces | ⌀ 200 mm / 150 mm
Depth
bis 72 m
Subsoil
Rock debris mixed with ammunition
Drillhole tests
SPT, Borehole scan
Expansion
Piezometer pipes 3" / 4"
Particular challenges
High safety requirements, risk of explosions

During World War II, an underground munitions depot was constructed in Mitholz by the Swiss Army. Following multiple explosions in December 1947, up to 3,500 gross tons of ammunition, along with several hundred tons of explosives, remain buried in the debris cone to this day. The goal is to safely remove the munitions, which involves extensive drilling work. More details:  SRF News

We are honored to be part of this fascinating and challenging project, where we will carry out 60 exploratory boreholes.

Drillmasters Simon and André, along with their support team, are putting in their utmost effort to contribute to the success of the project.