The Adams Mine began not as a political flashpoint but as a straightforward industrial operation on the Canadian Shield. Iron ore was first discovered at the site in 1906, but nobody cared much -- the Porcupine and Kirkland Lake gold rushes had drawn all the attention and investment to more glamorous metals. Half a century passed before the deposit attracted serious interest. Jones and Laughlin Steel Corp of Pittsburgh developed the site in the late 1950s, and first production began in 1964. The mine sprawled across the highest ground in the region, stretching over six pits. The largest measured over a kilometer in length. The deepest dropped 183 meters below the surface -- well below the water table. When Jones and Laughlin sold the operation to Dofasco Steel of Hamilton, Ontario, in 1971, it ran in tandem with the nearby Sherman Mine. For 27 years, daily blasting echoed across the Timiskaming District. Then, in 1990, the economically recoverable ore ran out. The Adams Mine closed, and the Sherman Mine followed. The region lost its economic anchor and never fully recovered.

Even before the last ore car rolled out, waste management planners in Metropolitan Toronto had their eyes on the abandoned pits. The city's Keele Valley Landfill in Vaughan was filling fast, and Toronto needed a new solution. The Adams Mine, with its massive excavated voids, looked ideal. The plan called for sealing municipal waste into intermodal shipping containers and hauling them north by CN and Ontario Northland Railway. The mine would become a municipal solid waste facility built on fractured bedrock, relying on hydraulic containment -- the theory that water flows into the pits but does not leach out into surrounding groundwater. No landfill liner would be needed. Proponents pointed to the economic lifeline it would throw to Kirkland Lake's struggling communities. Opponents pointed to the unstable rock walls, fractured from 27 years of daily blasting, and the risk of contaminants seeping into the local water supply. In 1990, Metro Toronto selected the Adams Mine as its preferred replacement for Keele Valley. The provincial environment minister killed the idea in 1991. It came back anyway.

The Adams Mine landfill fight played out like a political thriller spanning more than a decade. In 1995, Metro Toronto launched a formal environmental assessment, and the project passed every test. But in December 1996, councillor Jack Layton presented cumulative cost figures -- rather than annual costs -- that alarmed enough colleagues to defeat the vote 19 to 13. That loss sent Toronto's garbage to Michigan instead. The mine's owner, Notre Development, tried again through the private sector, assembling a consortium called Rail Cycle North that included Canadian Waste Services, Miller Waste Services, CN, and Ontario Northland Railway. The provincial Environmental Assessment Board approved the project in June 1998 after a limited hearing focused only on hydraulic containment. Courts rejected every appeal. On August 3, 2000, Toronto City Council voted to approve the Rail Cycle North plan. But community opposition was fierce, and by October the council reversed itself. Toronto went back to exporting garbage to Michigan's Carleton Farms Landfill.

Notre Development kept pushing through 2003, but the political ground was shifting. When Dalton McGuinty's Ontario Liberals won the provincial election, the new government moved decisively. On April 5, 2004, the province introduced legislation revoking every certificate and permit tied to the Adams Mine proposal, permanently killing the plan. Charlie Angus, a local musician and author who had organized the community campaign against the landfill, rode that momentum into federal politics, winning a seat in Parliament in the 2004 election. Meanwhile, the cross-border garbage shipments briefly became an issue in the 2004 American presidential race when John Kerry promised Michigan voters he would ban Canadian trash imports. The Michigan state legislature voted almost unanimously against accepting Toronto's waste in September 2005. Toronto finally stopped sending garbage to Michigan in 2006. The mine itself became the subject of a NAFTA Chapter 11 arbitration, with its American owner claiming Ontario had failed to compensate him for revoking the landfill permits. Today the six pits sit half-filled with water, silent monuments to both industrial extraction and political exhaustion.