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 was $12,448,856.06. Twenty-one double and three single locks were planned between Albany and Schenectady; one double and three single at Little Falls; two double and one single at Syracuse; one single lock at Lyons; two single at Lockville; one double and one single at Macedon. On January 1, 1838, these were all under contract, at a contract price of $3,035,087. One year later contracts to the amount of ten and one-half millions for the whole work of enlargement had been signed. The commissioners were authorized by an act passed April 18, 1839, to borrow four millions. The work went on rapidly. By April 1, 1842, the Rochester aqueduct was completed, at a cost of half a million; the north tier of the locks at Lockport was in use in April of the next year. The total cost of the works here was $610,978. In 1845 twenty-nine out of forty-nine double set of locks between Albany and Syracuse were completed and ninety-eight miles of the new enlarged