Category Archives: History

70+ year old Ellicott Dredge, “MINDI,” works round the clock, 24/7 on Panama Canal expansion

With about 18 months to go before the planned opening of the new third set of locks, the Panama Canal is leaning on its old work horse, the Ellicott dredge “Mindi,” built in 1941!

dredger-mindi-panama-1The “Mindi” is currently working seven days a week near the famed Culebra Cut to widen a turning radius for the new bigger ships expected by 2017. The CEO of the Panama Canal, Jorge Quijano, invited Ellicott CEO Peter Bowe to his house for a special dinner, where he told Bowe, “Maybe we will retire her after the expansion is finished.” This dredging project is an important component in the $5 Billion expansion project.

dredger-mindi-panama-2Ironically at the same moment a newer, bigger, European cutter dredge sits idle nearby in the Panama Canal’s maintenance facility for repairs.

dredger-mindi-3Also in the same vicinity you can see the enormous crane built by Germany for its World War II submarine effort (same time as the “Mindi”!), taken by the US Navy after the war. The Navy operated it for over 50 years before selling it to the Canal for $1 in 1998! This crane has a lifting capacity of 350 tons and is still supposed to be one of the world’s largest of its type.

dredger-mindi-4Final historical note:
Ellicott was not low bidder to the US Government for the “Mindi.” We were high by about 1%, but were evaluated as low bidder due to faster delivery that we offered–then, as now, delivery is valuable!

The Secret to Baltimore’s Success

“Why do you think Baltimore was so successful as a port?” asks Burt Kummerow, president of the Maryland Historical Society. Its location along the Chesapeake Bay? Its moderate climate? “No,” says Kummerow. “It was because of the immortal mud machine.”


Ah, the immortal mud machine. Like many East Coast harbors, Baltimore’s had–and still has– major issues with silt building up. Lucky for us, we had a key advantage: the dredge was invented right here.

blog2Flour merchants John and Andrew Ellicott, whose ships required deep ports to transport their cargo, are generally credited with being the first to employ a crude dredge to dig out the harbor, starting in 1783. (And in fact, Baltimore-based Ellicott Dredges still produces equipment today.) But it was Capt. Stephen Colver and a design he patented in 1798 that really improved the port. According to Kummerow, Colver’s dredge, basically a floating barge with a “scoop” powered by horses or men who turned a windlass, could haul up to 25 cubic feet of mud in every scoop. Colver was paid 1 cent for each cubic foot of dirt his team raised, earning the captain a fine income of more than $5,800 a year.

For his workers, it was a lousy job by any measure, “Who could endure the odors of the mud thrown out in warm weather upon the wharves?” a newspaper editor opined. During winter, Colver plied his workers with copious amounts of liquor to keep them working and warm.

By 1806, in an attempt to save money, the city bought out Colver and installed a “superintendent of the mud machine” to oversee the work. The effort saved taxpayers $3,141 a year and the harbor, via increasingly advanced “mud machines,” has kept the port navigable–and successful–ever since.