Ephraim S. Claybourn (February 8, 1851 – 1909) was the first superintendent of all floating equipment of theUnited States government's property on thePanama Canal Zone.

Claybourn was born on February 8, 1851, inDix, Illinois, to William D. Claybourn and Frances Alla Hawker. His nephewJohn G. Claybourn and cousin Vern Claybourn both held positions of prominence with thePanama Canal, making work there a family business of sorts. His great-granddaughter is skeet shooting championBecky McCumber.^[1]

Ephraim began working for the U.S. government in 1891 as an engineer on theMissouri River. In 1892, he was transferred to theMississippi River and worked on the dredge fleet atMemphis, Tennessee. He worked first as chief engineer of a centrifugal dredge, then as master of dredges, and later as master mechanic in which he built and operated the extensive dredging plant shops. At the time the plant included eight of the largest dredges afloat.^[1]

In 1905, theIsthmian Canal Commission sought engineers for work on the canal's construction, and since Claybourn was considered one of the best for such work, he accepted a position as superintendent of all floating equipment of the U.S. government property on the Canal Zone. He oversaw a staff of about 500 men and was paid $3,000 per year.^[2]

Claybourn designed and constructed the drydock shops atCristóbal, Colón, and rebuilt the "Old French" dock to accommodate larger vessels. He also supervised the construction of various canal machines, including several dredges and a variety of "Old French" machinery that was adapted to American methods.

Claybourn worked on the canal for about three years but resigned after a fall which affected his heart. He died in 1909.^[3]

• Panama Canal Zone
• American civil engineers
• 1851 births
• 1909 deaths

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