Disneyland's opening day brought problems for the ‘’Mark Twain’’. Actress Irene Dunne, star of the movie Showboat, had trouble breaking a bottle of water (from many major American rivers) across the vessel's bow for its christening on Dateline Disney.

During the riverboat's first official voyage, when the crowd moved to one side of the boat to view a passing scene of an Indian encampment or other sight, the boat would list from the side and water poured over the deck, as no one had determined the Mark Twain's maximum safe passenger capacity.

This oversight caused the Mark Twain to almost capsize on a voyage a few days later when ride operators continued to wave more than 500 guests on board until the deck neared the water line.

As the ship traversed the sparsely vegetated river route, it came loose from its track and got stuck in the muddy banks.

Immediately, the park established a maximum capacity of 300 passengers, which still remains in effect today.

www.disney-pal.com