 OKLAHOMA CITY, July 29, 2021 GLOBE NEWSWIRE -- On June 8, 2021, Mammoth Energy Services, Inc. Mammoth or the Company NASDAQ:TUSK announced that the Federal Emergency Management Agency FEMA released a Determination Memorandum dated May 26, 2021 related to hurricane repair work performed by Cobra Acquisitions LLC Cobra for the Puerto Rico Electric Power Authority PREPA. The Determination Memorandum raised two contract compliance issues and, as a result, FEMA concluded that approximately 47 million in costs were not authorized costs under the contract. PREPA had 60 days from the receipt of FEMAs Determination Memorandum to file an appeal. 