ANCHORAGE, ALASKA ? An oil spill in Alaska’s North Slope could end up being one of the region’s largest, officials said Wednesday as the cleanup continued.

Crews have recovered 58,590 gallons – or 1,395 barrels – of crude and snow since the pipeline spill was discovered last Thursday in the Prudhoe Bay field, about 650 miles north of Anchorage. Most of the recovered material probably will turn out to be crude once the water is separated out, officials said.

That means the spill could be the largest ever in the North Slope, surpassing a 38,850-gallon spill in 1989. By comparison, the Exxon Valdez spilled 11 million gallons when it ran aground in Prince William Sound in 1989.

Lynda Giguere of the Alaska Department of Conservation said officials should have an estimate today of how much crude spilled onto a two-acre area from the line, which leads to the trans-Alaska pipeline.