U.S. DEPARTMENT OF THE INTERIOR          
                        U.S. GEOLOGICAL SURVEY                               
                                                                         
                                                                         
                     
     Distribution and Quality of Potential Sources of Aggregate
      Infrastructure Resources Project Area, Colorado-Wyoming

                                  By

  William H. Langer, Gregory N. Green, Daniel H. Knepper, Jr., David
  A. Lindsey, David W. Moore, L. David Nealey, and John C. Reed, Jr.
                                              
                                                                  
                            Open-File Report                           
                                                                   
                               OF-97-477


  
                                                                          
                                  1997                                  
                                                                           
     This report is preliminary and has not been reviewed for conformity    
     with U.S. Geological Survey (USGS) editorial standard nor with the     
     North American stratigraphic codes.  Any use of trade, product, or      
     firm names is for descriptive purposes only and does not imply          
     endorsement by the USGS. Although these data have been used by the      
     USGS and have been successfully imported into data base programs, no    
     warranty, expressed or implied, is made by the USGS as to how          
     successfully or accurately the data can be imported into any specific  
     application software running on any specific hardware platform.  The   
     fact of distribution shall not constitute any such warranty, and no   
     responsibility is assumed by the USGS in connection therewith.        
                                                                            
                                                                            
                                                                            
                                                                             
     U.S. Geological Survey                                                   
     Denver, Colorado                                                    
                                                                         
     Last revsion: 18 August 1997