After 13 years, Valdez's oil damage lingers

Exposure to oil resulted in the deaths of 250,000 seabirds, 2,800 sea otters, 250 bald eagles, nearly two dozen killer whales, and billions of salmon crucial to the thriving commercial fishing industry.

After the spill, Exxon enlisted a small army of independent scientists to assess the damage. "Exxon was horrified by this spill, and we are extremely sorry for it," Mr. Cirigliano says. "We stayed on the scene carrying out cleanup until the Coast Guard and the state of Alaska told us it was time to stop."

The Alaska Coalition's request for additional damages comes in the wake of an ecosystem assessment released in August by the Exxon Valdez Oil Spill Trustee Council. The council was created to oversee disbursement of roughly $1 billion paid by Exxon in the settlement aimed at restoring the sound to its former vitality. That fee is on top of the $2.5 billion charged to the company for cleanup in the two years after the spill.

But for some, the punative payouts have been insufficient. Mr. Steiner estimates that the economic and ecological damage is closer to $15 billion.

The council's latest report identifies several species as not yet having recovered. Among the wildlife on the list: loons, three species of cormorants, harlequin ducks, harbor seals, a pod of killer whales (orcas), and herring, a food staple for more than 20 species.

While the Trustee Council has listed six species – bald eagles, black oystercatchers, murres, pink and sockeye salmon, and river otters – as returning to prespill levels, Exxon says its own findings are more optimistic, reflecting nature's resiliency and ability to heal itself. Cirigliano says there is ample evidence by Exxon's scientists in peer-reviewed journals to suggest that ecologically speaking, the marine ecosystem is functioning again.

Prince William has become the most intensively studied marine environment in the world, yet the fundamental disagreement between the oil company's scientists and other assessments is difficult to reconcile.

In truth, there's so much humans still don't know about the ecosystem, says Trustee Council member David Gibbons, a fisheries biologist who vividly recalls the smell from the slick on the day it swamped the area.

If there's one thing that Exxon and environmentalists agree upon, it's that not enough money has been channeled into restoration. Much of the settlement money has gone into funding studies and buying up wildlife habitat to protect affected species against growing industrial development.

Steiner says the additional $100 million could address concerns that have surfaced only recently, but Exxon says any further payment must be requested by the federal and state governments, which so far, have been reluctant to act.

For ecotourism captain Sanger, the dispute over money misses the point.

"This kind of experience, in which people can witness the richness of the ocean, is becoming rarer every day," he says. "Wild nature has a value that you can't put a number on."

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