Types, Causes, and Effects of Instability Phenomena in Reclaimed Spoils At Two Surface Coal Mines in Western North Dakota. Appendices.
For Reference Only At Bureau Libraries :320 pages
Monitoring of reclaimed mine spoils at the Indian Head and Center Mines showed three forms of instability: area wide settlement, localized collapse, and piping. Over 200 survey markers were installed at the two mines and monitored from 1977 through 1982. Data indicate that settlement time should be provided before structures are built or settlement monitored during construction. Localized collapse was observed at both mines, and piping was observed at the Indian Head study site. This volume consists of appendixes containing marker data.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
N.d. Geological Survey