Readme file for USGS Data Series 547: The attached program, Continuous2010, is a Monte Carlo program that uses @Risk software (Palisade, 2010) to run within Microsoft Excel (Microsoft, 2007). Before using the program, the user must purchase and install both of these commercially available software packages. Once installed, the Continuous2010 program runs normally like any other @Risk program. The user is referred to the documentation for those software programs for general instructions on running the program. Continuous2010 includes several spreadsheets. All the input is to be entered on the "Input" spreadsheet in the yellow boxes. The spreadsheet "RiskTemplate_Input" is provided to the user who wishes to add a record of the input data to reports generated by @Risk. "Although this program has been used by the USGS, no warranty, expressed or implied, is made by the USGS or the United States Government as to the accuracy and functioning of the program and related program material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith."