Lower Risk in Mitholz, High Costs Persist
- MITHOLZ, Switzerland (AP) — A newly released report on exploratory excavations at the partially buried railway tunnels near Mitholz indicates that the risk of a catastrophic explosion at...
- Ammunition specialists, after examining the site, concluded that the concentration of explosives is less dense than initially projected."So far, only isolated 50-kilogram aviation bombs have been discovered," the...
- The Swiss Federal Department of Defense, Civil Protection and Sport (VBS), in its initial assessment, operated under a worst-case scenario, anticipating a potential explosion involving several tons of...
Mitholz Ammunition Depot: Explosion Risk Lower Than Initially Feared, Report Suggests
Table of Contents
- Mitholz Ammunition Depot: Explosion Risk Lower Than Initially Feared, Report Suggests
- Swiss Ammunition Depot Explosions Cause Significant Damage
- Blast From the Past: Kandergrund Explosion Remembered
- Mitholz Explosion: A Swiss Village’s Day of Disaster in 1947
- Swiss Political Leaders Debate Military Spending, Environmental Concerns
MITHOLZ, Switzerland (AP) — A newly released report on exploratory excavations at the partially buried railway tunnels near Mitholz indicates that the risk of a catastrophic explosion at the former ammunition depot is significantly lower than previously assumed.The findings offer a fresh viewpoint on the extensive and costly remediation efforts underway.
Ammunition specialists, after examining the site, concluded that the concentration of explosives is less dense than initially projected.”So far, only isolated 50-kilogram aviation bombs have been discovered,” the report states. “At this concentration, the possibility of a mass detonation is considered unlikely.”

The Swiss Federal Department of Defense, Civil Protection and Sport (VBS), in its initial assessment, operated under a worst-case scenario, anticipating a potential explosion involving several tons of explosives. However, the new report suggests this outcome is “extremely unlikely.”
Worst-Case Scenario Remains a consideration
Despite the report’s findings,the VBS is maintaining its original risk analysis. “An explosion involving multiple ammunition items cannot be entirely ruled out,” the department said in a statement. The primary reason for this cautious approach is that approximately three-quarters of the tunnel remains inaccessible for thorough investigation. Thus, a comprehensive assessment of the overall risk is not yet possible.
as an inevitable result, the existing security perimeter for the local population will remain in place, as will the planned protective structures for the rail and road lines. Thes measures include the extension of the Mitholz tunnel and the construction of a protective gallery above the railway line, deemed “indispensable for the safe passage thru the danger zone.”
Cost Concerns Raised
The revised risk assessment has prompted questions among politicians regarding the allocation of funds for the complete evacuation of the ammunition depot.Parliament previously approved a loan of CHF 2.59 billion for the project.
“It would be desirable if we could invest in armaments projects.”
Reto Nause, a member of the swiss National Council, acknowledged the necessity of the protective structures but suggested a potential reassessment. “The planned protective buildings must be realized,” he said. “But experts have to assess weather you can cut back there.”
Nause added, “If funds are released, it would be desirable if we could invest them in arms projects.” He noted that parliamentary action would be required to redirect these funds within the VBS budget.
The Mitholz Catastrophe of 1947
The current remediation efforts are a direct response to the devastating explosion that occurred in Mitholz in 1947. The disaster, one of the largest of its kind in Swiss history, resulted in critically important loss of life and widespread destruction.

The incident serves as a stark reminder of the potential dangers associated with improperly stored munitions and the importance of thorough risk assessment and mitigation.
Swiss Ammunition Depot Explosions Cause Significant Damage
Multiple heavy explosions rocked a Swiss army ammunition depot, resulting in the destruction or burning of approximately 4,000 of the 7,000 tons of ammunition stored at the site, according to the Swiss Federal Department of Defence, Civil Protection and Sport (VBS).
Tunnel Entrances Damaged

The explosions caused significant damage to the bricked-in tunnel entrances of the former ammunition camp. The extent of the structural damage is still being assessed.
Inside the Tunnels

Images released by the VBS show the interior of one of the tunnels heavily damaged following the explosions. Debris and structural damage are visible throughout the tunnel.
Rock Wall Collapse

The force of the explosions also lead to a significant rock wall collapse at the site. Approximately 250,000 cubic meters of rock were loosened as a result of the blasts, according to the VBS.
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Blast From the Past: Kandergrund Explosion Remembered
KANDERGRUND, Switzerland (AP) — A somber anniversary marks the devastating explosion in Kandergrund that claimed lives and reshaped the community decades ago.
A tragic chapter in Kandergrund’s history remains etched in the collective memory: a catastrophic explosion that ripped through the village, leaving a trail of destruction and loss. The disaster resulted in nine fatalities and numerous injuries, leaving 200 residents without homes.
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The force of the blasts was immense, leveling or severely damaging approximately 40 houses. The resulting property damage was initially estimated at CHF 100 million, a figure equivalent to roughly CHF 490 million in today’s currency.
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In the wake of the tragedy, the community gathered at the Kirchlein Kandergrund for a poignant funeral service, mourning the lives lost and beginning the long process of healing.
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The Kandergrund explosion serves as a stark reminder of the fragility of life and the enduring strength of community in the face of adversity. The event prompted significant changes in safety regulations and emergency response protocols.
While the physical scars have faded over time, the emotional impact remains. Kandergrund continues to honor the memory of those lost and strives to ensure such a tragedy never repeats itself.
