...with the plan of the District Engineer and with such modifications thereof as in the discretion of the Chief of Engineers may be advisable ; at an estimated cost of $16,000,000 for construction and $83,000 annually for operation, maintenance, and major replacements,...

...district engineer and with such modification thereof as in the discretion of the Secretary of the Army and the Chief of Engineers may be advisable, at an estimated cost to the United States of $1,356,800 for construction with $1,000 annually for maintenance in addition...