 Boot reported that Martínez' canal called Huehuetoca or Nochistongo was inadequate and presented plans for a new work which would cost $185,900; Martínez offered with 300 men and $100,000 to finish the work, and to moreover divert into the course of the canal the waters of the River Cuauhtitlan, which, when it rose, overflowed into the valley of Mexico.Boot's plan was rejected, and that presented by Martínez was accepted with the king's approval.The royal approbation was obtained 3 April 1616, and Martínez received his instructions to begin the work at once.