A revised grid shape file (grid.zip) is in "Model-construction related file|Model grid".  The western boundary of the grid is along the fall Line and the eastern boundary is about 20 miles offshore (as located in Jeff's recent grid revision).

Grid origin (lower left corner): x=1,155,000; y=-20,000
cell dimensions: 2,500 x 2,500 feet
rows: 315
columns: 329