Charges for Minnesota defendants have been reduced relative to the original charges.  Press reports and videos featuring the valve turners may mention the original charges and the original very heavy penalties.  The current charges, shown here, are plenty serious enough:

Annette Marie Klapstein (MN)

Aiding and Abetting Criminal Damage to Property of Critical Public Service Facilities, Utilities and Pipelines
Felony / 10 years, $20,000 or both

Emily Nesbitt Johnston (MN)

Criminal Damage to Property of Critical Public Service Facilities, Utilities and Pipelines
Felony / 10 years, $20,000 or both

Aiding and Abetting Criminal Damage to Property of Critical Public Service Facilities, Utilities and Pipelines
Felony / 10 years, $20,000 or both

Ben Joldersma (MN, support)

Aid and Abet Criminal Damage to Property of Critical Public Service Facilities, Utilities and Pipelines
Felony / 5 years, $10,000 fine or both