Malicious Damage Act, 1861

Destroying any sea bank, &c. or wall of any canal, &c.

30. Whosoever shall unlawfully and maliciously break down or cut down or otherwise damage or destroy any sea bank or sea wall, or the bank, dam, or wall of or belonging to any river, canal, drain, reservoir, pool, or marsh, whereby any land or building shall be or shall be in danger of being overflowed or damaged, or shall unlawfully and maliciously throw, break, or cut down, level, undermine, or otherwise destroy, any quay, wharf, jetty, lock, sluice, floodgate, weir, tunnel, towing-path drain, watercourse, or other work, belonging to any port, harbour dock, or reservoir, or on or belonging to any navigable river or canal, shall be guilty of felony, and being convicted thereof shall be liable, at the discretion of the court, to be kept in penal servitude for life . . . or to be imprisoned . . . and, if a male under the age of sixteen years, with or without whipping.