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* The agency initially proposed a $720,000 sanction in November 2015

* "The extent and seriousness of the consequences of the violations cannot be overstated," the Alaska Oil and Gas Conservation Commission said in its decision

* The AOGCC on Friday said Hilcorp "has a significant history of noncompliance" with the its regulations, leading to several enforcement actions against the company.

* "The potential severity of the outcome of Hilcorp's actions, Hilcorp's ongoing history of performing work outside of approved permits or management-of-change protocols, its history of compliance issues and the need to deter are significant factors in the AOGCC's analysis," the agency said.

* Hilcorp Alaska was fined $100,000 by the federal agency to settle violations by that company, the EPA said.