Not so fast. The Granite Construction/PALCO gravel operations at South Fork, Glynn, and Carlotta, plus (possibly) the Drake (Shamrock) site at Fortuna, could ship 6,000 carloads of aggregates to the Port (South Bay?) for movement to San Francisco Bay destinations by barge without breaking a sweat. At most, that is only 600,000 tons, or 120 barge loads (and fewer if bigger barges are used). That forecast may, however, presume the construction pace in the Bay Area remains high and competing aggregate sources remain pricey. There is at least one (and possibly two) new water transfer terminals for aggregate transloading on the Petaluma River.