Selective Placement of Strip Mine Overburden in Montana. V. Summary Report.
Dollhopf-DJ; Goering-JD; Levine-CJ; Et Al
NTIS: PB 83-114884 :211 pages
The objective of this study was to investigate the means of establishing nonpolluted ground water and root zone systems in areas where surface mining intercepts physiochemically unsuitable overburden materials. Overburden may need to be sampled on a 60-m grid to delineate materials unsuitable for reclamation and to accurately implement selective handling operations. Unsuitable overburden materials were buried successfully in a dragline operation with a minimum of delays, but costs were increased 12 to 53 pct. After 3 years the buried material remains above the reestablished aquifer and below the root zone. It was shown that some unsuitable overburden materials do not have to be special handled. At least a portion of the post-mine aquifer had hydraulic conductivity rates lower than the premine system, indicating the reestablished aquifer may, in part, conduct ground water very slowly. Postmine ground water chemical quality in spoil materials had poorer quality compared with premine ground water.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 83-114884
Montana State University