Total tonnage for all commodities moving across Port of Redwood City’s docks during the first half of fiscal year 2012-13 was 666,543 metric tons, an increase of 9 percent over the previous fiscal year. Imported sand and aggregates through the northern California port from British Columbia accounted for 444,060 metric tons, or about 67 percent of the tonnage for the first half of the fiscal year. This was more than a 20 percent increase in the amount from the same period last fisc...