Opponents are continuing to push against the proposed Pebble Mine project in the Bristol Bay region of Alaska, even as the Army Corps of Engineers is expected to issue a final Environmental Impact Statement on the project next year.

Case centers on whether pollution moving through groundwater should require "point source" permit.

When Mark Callahan looks back on the arduous but successful seven-year effort of managing the project development and environment study for the $1.6-billion Wekiva Parkway, he gives credit to an unlikely group—environmentalists who once opposed it.