NPCA's Timeline: 2001-present
| 2005: |
Using the Clean Air Act, NPCA won a lawsuit against the Department of the Interior to protect Yellowstone National Park from the proposed Roundup coal-fired power plant. |
| June 6, 2005: |
The U.S. Supreme Court rules that the submerged lands and tidelands of Glacier Bay National Park belong to the general public, as managed by the Park Service, and not the state of Alaska. NPCA filed an amicus brief in this case, in an effort to ensure that the area, and its wildlife, would be protected by the Park Service. |
| 2005-2006: |
 NPCA mounts a successful national campaign that blocks the rewriting and weakening of the National Park Service's guiding management policies. |
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