A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Environmental Control Technology Survey: Iowa Coal Project Demonstration Mine No. 1
As a result of the Iowa Coal Project Demonstration Mine No. 1, 108,000 tons of coal resources were recovered and the land surface was transformed from a steeply sloped pasture to a benched terraced topography capable of supporting intensive agriculture. The permanent environmental impact of the site is improved because water runoff from the site is controlled by the installation of lesser slopes. Measures could be taken, however, to lessen the environmental impact during mining. Better sediment control structures could be developed. A connected, two-pond system would allow for sediment control in the upper pond, treatment accessability between ponds, and a lower pond to allow the flocculents caused by treatment to settle out before the water is released to the receiving stream. During mining the primary source of acid drainage to the sediment pond was the large stock pile of toxic shales. Were the size of this operation larger, the exposure of this pile to weathering would have been longer. Future mining plans might include covering the acid shale pile with non-toxic materials to prevent oxidation and the generation of acid mine drainage. This of course would be dependent upon the size of the pile, the cost, availability of non-toxic materials and the requirement that the stockpile size not change over time. Covering and revegetating the acid shale pile would reduce the acid source and perhaps reduce the costs of acid neutralization at the pond. (ERA citation 03:046374)
Environmental Control Technology Survey: Iowa Coal Project Demonstration Mine No. 1
As a result of the Iowa Coal Project Demonstration Mine No. 1, 108,000 tons of coal resources were recovered and the land surface was transformed from a steeply sloped pasture to a benched terraced topography capable of supporting intensive agriculture. The permanent environmental impact of the site is improved because water runoff from the site is controlled by the installation of lesser slopes. Measures could be taken, however, to lessen the environmental impact during mining. Better sediment control structures could be developed. A connected, two-pond system would allow for sediment control in the upper pond, treatment accessability between ponds, and a lower pond to allow the flocculents caused by treatment to settle out before the water is released to the receiving stream. During mining the primary source of acid drainage to the sediment pond was the large stock pile of toxic shales. Were the size of this operation larger, the exposure of this pile to weathering would have been longer. Future mining plans might include covering the acid shale pile with non-toxic materials to prevent oxidation and the generation of acid mine drainage. This of course would be dependent upon the size of the pile, the cost, availability of non-toxic materials and the requirement that the stockpile size not change over time. Covering and revegetating the acid shale pile would reduce the acid source and perhaps reduce the costs of acid neutralization at the pond. (ERA citation 03:046374)
Environmental Control Technology Survey: Iowa Coal Project Demonstration Mine No. 1
J. B. Gulliford (author) / L. V. A. Sendlein (author)
1978
71 pages
Report
No indication
English
| Engineering Index Backfile | 1936