Exhibit 11
                          MARKWEST HYDROCARBON, INC.
                   COMPUTATION OF EARNINGS PER COMMON SHARE



 
 
                                            FOR THE THREE MONTHS ENDED 
                                                      MARCH 31,
                                                1997               1996
                                        --------------------------------------
 
                                                            
Net income (pro forma for 1996)                   $4,282             $2,587
 
Weighted average common
 shares outstanding (pro forma for 1996)           8,485              7,908
 
 
Earnings per common share (pro forma 
 for 1996)                                        $  .50             $  .33