Suggested citation and version history for: Collins, B.D., Minasian, D., and Kayen, R., 2009, Topographic change detection at select archeological sites in Grand Canyon National Park, Arizona, 2006-2007: U.S. Geological Survey Scientific Investigations Report 2009-5116, 58 p. [http://pubs.usgs.gov/sir/2009/5116/]. Version 1.0 August 16, 2011 fixed typo on page 8. At the bottom of the first column, in Equation (2c) the square root sign should only apply to "3" and not the "delta z". fixed typo on page 55. In Table 3, in the 5th and 6th columns (Average, maximum height of erosion (cm)) and (Average, maximum height of deposition (cm)). Here, all the values should have commas in between the numbers rather than decimals. June 16, 2009 Initial release online at http://pubs.usgs.gov/sir/2009/5116/