The Alaska Clean Water Initiative (ACWI) of 2008 was a citizens-initiative ballot measure. In Alaska, such measures become state law, if a majority of voters vote in favor of the measure. The ACWI contained regulatory language limiting the release and distribution of "sulfide mining" effluents and products into the environment. In August 2008, Ballot Measure 4, the "Alaska Clean Water Initiative," was voted down (approximately 57% against and 43% in favor) in the statewide primary election.
The ACWI was created by opponents of possible future development at Pebble mine: the same political forces that led to the Bill to create Jay Hammond State Game Refuge and the Bill for Protection of Salmon Spawning Water. Ballot Measure 4 was written to apply statewide; as the State constitution demands. The measure would have effectively outlawed large-scale metal mining in the Bristol Bay drainage. Supporters of the Measure argued strongly that the Measure would not affect any other mining operation in Alaska. Opponents of the Measure argued that it would have serious, and unnecessary, adverse effects on the mining industry statewide.
Over 10 million combined dollars were spent on advertising and other efforts by the opponents and proponents of Ballot Measure 4. The largest portion of that was provided by the mineral industry to oppose the Ballot Measure; the largest publicly reported personal expenditure, over $800,000 dollars, was by Bob Gillam, an investment professional and owner of a private lodge a few dozen miles from the Pebble site, who helps lead opposition to Pebble.
In Alaska, an initiative is, "the procedure by which the people instead of the legislature introduce and enact a law. A specified number of voters propose the law they wish to be placed on a ballot to have it voted up or down by their fellow Alaskans. By law, an initiative can not be narrowly targeted, it must have statewide effect. [Ref. AS 15.45.010-245]."