The agency also said it was taking steps to limit the size and number of valley fills that can be built in Appalachian streams.
32.
There is evidence of densely wooded valley fills and significant input of humic material, similar to the observed palaeoclimatic setting of the Pilbara examples.
33.
In December 2005 a coalition of environmental groups filed a lawsuit to stop Arco from getting the necessary permits to create more valley fills.
34.
Excess rock and soil containing mining byproducts are disposed into nearby valleys, in what are called " holler fills " or " valley fills ."
35.
It said ephemeral streams, those that flow as a result of snow melt or rain, could be buried by the waste, a practice called valley fills.
36.
No effect on related environmental values is more adverse than obliteration . . . Under a valley fill the water quality of the stream becomes zero.
37.
It starts from the historic Kamthana Bhandara ( reservoir ) with a huge laterite stone embankment build across the valley fill between Kamthana and Bidar neighbourhood.
38.
What is at issue is the disposal of valley fill _ rock, soil and trees blasted off mountaintops to expose deposits of coal for miners to extract.
39.
Image : Coloe Fossae Lineated Valley Fill . JPG | Lineated valley fill in Coloe Fossae, as seen by HiRISE . Scale bar is 500 meters long.
40.
At the same time, McCabe of the EPA said that several federal agencies have begun talking about a comprehensive study of the potential consequences of valley fills.
