Disaster strikes when an 11-ton rock-shaker is dropped off a low loader; a mechanic falls ill; and the Department of Fish and Game threatens to shut down the water supply to the mine.
The Hoffmans arrive at Porcupine Creek in Alaska to begin searching for gold; the crew heads to the Klondike in a bid to salvage the season; and gold is found at the Big Nugget mine.
Todd doubles down on men, land and equipment; the Dakota crew tries to protect its land from floods; and Todd strikes a deal to help a crew return to work.
Todd faces disaster when he discovers his claim has been mined out; the crew is forced to transport vital mining equipment through hostile jungle; and an attempt is made to set up a wash plant.
In Season 5, Tony buys a gold-catching dredge, Parker mines a swamp, Todd, Jack and Thurber tackle their first clean up and Dave works with the Hoffman crew under a new agreement.
In Season 6, Todd sets a massive goal, Grandpa John is rushed to the hospital, Tony's dredge starts producing gold, Parker's new mechanic sparks a mutiny and Todd opens a risky new cut.
In Season 7, Tony expands his empire with a second dredge, the Hoffman crew faces a make or break decision and Parker and his crew start a new chapter in their mining history.