Simmons refutes the latest estimate of 45,000-60,000 barrels per day. America's largest research vessel, The Thomas Jefferson, estimates the leak at 120,000 barrels per day (bpd). The researchers also estimated a submerged lake underneath the surface of the water could be covering up to 40% of the Gulf. I suggest watching the video to develop a sense of the size of the environmental calamity unfolding and scope of the future economic impact from it.
Source: youtube.com