You SOB, that's not how bridges are built! You may count your lucky bricks if they haven't been dumped on your feet in a big fat pile. You may count your blessings even more if they HAVE: because such quantities are hard to find! 

It's generally baking one brick at a time, collecting a little barrowful,  schlepping them and stacking them one by one all the way till you have enough bridge for a rest and a game of Pooh sticks. And then there is more schlepping and stacking. 

In the meantime you can still drag the trebuchet along, to ward off brick filchers always on the look out to sneak up and grab a brick while the cement is not yet dry.