ise the financial district went ahead more or less as planned, but with one modification.  Instead of filling in the whole area, the <em>streets</em> were raised to the desired level.  As the filling happened, each block of businesses would be surrounded by a retaining wall, and the streets between the walls would be filled with dirt.  This meant that the sidewalks were actually below street level, once the street was filled in, so pedestrians got to walk along a block, scale a ladder or staircase, cross th