Built in 1977 by the Louis G Ortiz Boat Company of Krotz Springs, Louisiana as the Mary Lee Rivero (hull #27) for Mary Lee Rivero Towing Incorporated of Belle Chasse, Louisiana.

In 1995, the tug was acquired by the Bowhead Transportation Company Incorporated of Seattle, Washington. Where she was renamed as the Sadie Brower Neakok.

In 2001, she was acquired by Roger C. Niemeth of Anderson, California. Where the tug was renamed as the Miss Pill.

In 2011, the tug was acquired by Westar Marine Services Incorporated of San Francisco, California. Where she was renamed as the Fatcat.

Her powerplant consists of two CAT 3508B diesels turning two propellers. For a rated 1,550 horsepower.