We estimated that the reservoir originally stored 80600 metric tons (1 metric ton = 1000 kg) of sediment when the dam was removed. At the time of the second post-removal survey (in October 2008), the remaining mass of sand in the reservoir was 42030 metric tons (52% of original total). What was the rate of sediment transport out of the reservoir (in metric tons/day) by the river during this 81-day interval