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K) In 1905, a U.S. engineering panel was commissioned to review the canal design, which still had not been finalized. In 1906 Stevens declared a sea-level approach to be 'an entirely untenable proposition' He argued in favor of a canal using a lock system to raise and lower ships from a large reservoir 26m above sea level. This would create both the largest dam (Gatun Dam) and the larges man-made lake (Gatun Lake) in the world at the time.