A National Oceanic and Atmospheric Administration video, shot as officials coordinated response to the Deepwater Horizon disaster, shows that federal officials almost immediately worried that the oil well could leak up to 110,000 barrels per day, or 4.6 million gallons.

The video appears on a federal Web site.

It was filmed in Seattle, at NOAA's Western Regional Center, as scientists and federal officials in Seattle, Houston and New Orleans engaged in telephone conferences, according to a companion document on the Web site.

The video appears to have been edited, and it was shot by a person carrying a camera from room to room.

In it, officials are discussing the search for survivors of the Deepwater Horizon explosion. There is a hand-drawn map of the spill dated April 22. At one point, the video freezes on a sign next to a door that reads, "War Room."

In one scene, officials say that the estimate for the leak in a worst-case scenario is between 65,000 and 100,000 barrels per day. A dry erase board on the wall reads "Estim: 64,000 to 110,000 bbls/day. CNN reported 300,000 gal/day."

The high end of the estimate, 110,000 barrels, is about 4.6 million gallons. At that spill rate, 32 million gallons of oil would enter the Gulf every week. By comparison, the entire Exxon Valdez spill was about 11 million gallons.

Officials estimate current flow from the damaged well at 210,000 gallons a day.

It is unclear from the video what events would have to transpire to raise the flow rate higher.

A confidential NOAA report, dated April 28 and circulated among federal agencies, makes similar projections regarding spill size in a worst-case situation.

It describes newly discovered leaks in the tangle of riser pipe, attributing them to ongoing erosion of the pipe. The riser pipe, in this case about 5,000 feet long, connects the wellhead on the sea floor to the drilling rig on the surface.

"If the riser pipe deteriorates further, the flow could become unchecked," reads the report.

On Thursday, the day after the NOAA report was circulated, BP officials said they were worried about "erosion" of the piping.

Sand is an integral part of the formations that hold oil under the Gulf. The raw crude rising from the bottom of a well carries sand and other abrasive materials. In effect, the oil is sandblasting the piping as it rushes through with tremendous force, according to petroleum engineers.

"I think we need to be prepared for it to be the spill of the decade," Debbie Payton of NOAA, the meeting's coordinator, says during the NOAA video.

NOAA did not immediately respond to the Press-Register's request for comment on the video.