Erratum to: Bull Eng Geol Environ (2014) DOI 10.1007/s10064-014-0576-x

The authors would like to correct errors in the original publication as detailed below.

The fifth author’s second initial was incorrectly typed as “F” instead of “R”. The fifth author’s name should read as “J. R. Keaton”.

In the original published article, the word “model” in the sub-headings of the Conclusion section was changed to “mode” during copyediting. The Conclusion’s sub-headings should read as “conceptual engineering geological model”, “observational engineering geological model” and “analytical model”.