Sure. But also, no-one is blowing bridges by hanging explosives inside instead of drilling them into the structure.
For 28 years, the bridge carried traffic and goods, including timber from the Soviet Union, until replaced by the present concrete structure. Pits for demolition charges are visible in the piles. These cavities could be filled with explosives in order to blow the bridge to smithereens should this ever have become necessary.
https://sotatie.fi/en/battlegrouds-trail/site-descriptions/mohko-village