The Effects of Mountaintop Mines and Valley Fills on Aquatic Ecosystems of the Central Appalachian Coalfields (External Review Draft)
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This report assesses the state of the science on the environmental impacts of mountaintop mines and valley fills (MTM-VF) on streams in the Central Appalachian Coalfields. Our review focused on the aquatic impacts of mountaintop removal coal mining, which, as its name suggests, involves removing all or some portion of the top of a mountain or ridge to expose and mine one or more coal seams. The excess overburden is disposed of in constructed fills in small valleys or hollows adjacent to the mining site. MTM-VF lead directly to five principal alterations of stream ecosystems: (1) springs, intermittent streams, and small perennial streams are permanently lost with the removal of the mountain and from burial under fill, (2) concentrations of major chemical ions are persistently elevated downstream, (3) degraded water quality reaches levels that are acutely lethal to standard laboratory test organisms, (4) selenium concentrations are elevated, reaching concentrations that have caused toxic effects in fish and birds and (5) macroinvertebrate and fish communities are consistently and significantly degraded.
|Sep 2009||Federal Register Notice: SAB call for reviewers.|
|Nov 2009||Internal peer review completed.|
|Mar 2010||EPA released the draft report for public review and comment. [Federal Register April 12, 2010]|
|May 2010||EPA's Science Advisory Board (SAB) Staff Office announced the public meeting of the SAB Panel for the review of this draft report on July 20-22, 2010 in Washington, DC. [Federal Register May 25, 2010]|
|Jun 2010||EPA extends the public review and comment period until July 13, 2010. [Federal Register Jun 1, 2010]|
|Jul 2010||EPA extends the public review and comment period until August 13, 2010. [Federal Register July 13, 2010]|
|Aug 2010||EPA extends the public review and comment period until September 3, 2010. [Federal Register Aug 18, 2010]|
|Sep 2010||EPA's Science Advisory Board (SAB) Staff Office announced the second public meeting of the SAB Panel for the review of this draft report on October 20th & 26th, 2010 in Washington, DC. [Federal Register Sep 15, 2010]|
This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.
- (119 pp, 2 MB, about PDF)
- A Field-Based Aquatic Life Benchmark for Conductivity in Central Appalachian Streams (2010) (External Review Draft)
- The Effects of Mountaintop Mines and Valley Fills on Aquatic Ecosystems of the Central Appalachian Coalfields (2011 Final)
- A Field-Based Aquatic Life Benchmark for Conductivity in Central Appalachian Streams (Final Report)