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EXHIBIT 12.1
 DUNCAN ENERGY PARTNERS L.P.
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(Dollars in thousands)
 Duncan EnergyDuncan Energy
    
    
    
    PartnersPartners
    
    
    
    PredecessorFor the Eleven
    
    
    
    For the OneMonths Ended
    
    
    
    Month EndedDecember 31,
    
    
    
    January 31,2007
    
    
    
    2007Consolidated income
    
    $
    19,232
    
    
    
    $
    5,035Add:   Parent interest in income of subsidiaries
    
    
    19,973
    
    
    
    
    Provision for income taxes
    
    
    307
    
    
    
    
    Less:   Equity in (income) loss of unconsolidated affiliate
    
    
    (157
    )
    
    
    
    (25
    )Consolidated pre-tax income before parent interest in
income of subsidiaries and equity earnings from
unconsolidated affiliate
    
    
    39,355
    
    
    
    
    5,010Add:   Fixed charges
    
    
    12,328
    
    
    
    
    21Amortization of capitalized interest
    
    
    590
    
    
    
    
    Subtotal
    
    
    52,273
    
    
    
    
    5,031Less:   Interest capitalized
    
    
    (2,600
    )
    
    
    
    Parent interest in income of subsidiaries
    
    
    (19,973
    )
    
    
    
    Total earnings
    
    $
    29,700
    
    
    
    $
    5,031Fixed charges:Interest expense
    
    $
    9,279
    
    
    
    $
    Capitalized interest
    
    
    2,600
    
    
    
    
    Interest portion of rental expense
    
    
    449
    
    
    
    
    21Total
    
    $
    12,328
    
    
    
    $
    21Ratio of earnings to fixed charges
    
    
    2.41x
    
    
    
    
    239.57x
 Duncan Energy Partners PredecessorFor the Years Ended December 31,2006
    
    
    2005
    
    
    2004
    
    
    2003Consolidated income
    
    $
    55,337
    
    
    $
    39,087
    
    
    $
    58,124
    
    
    $
    52,454Add:   Provision for income taxes
    
    
    21
    
    
    
    
    
    
    
    
    
    
    
    Less:   Equity in (income) loss of unconsolidated affiliate
    
    
    (958
    )
    
    
    (331
    )
    
    
    (231
    )
    
    
    (131
    )Consolidated pre-tax income before equity earnings from
unconsolidated affiliate
    
    
    54,400
    
    
    
    38,756
    
    
    
    57,893
    
    
    
    52,323Add:   Fixed charges
    
    
    420
    
    
    
    405
    
    
    
    378
    
    
    
    390Total earnings
    
    $
    54,820
    
    
    $
    39,161
    
    
    $
    58,271
    
    
    $
    52,713Fixed charges:Interest portion of rental expense
    
    $
    420
    
    
    $
    405
    
    
    $
    378
    
    
    $
    390Total
    
    $
    420
    
    
    $
    405
    
    
    $
    378
    
    
    $
    390Ratio of earnings to fixed charges
    
    
    130.52x
    
    
    
    96.69x
    
    
    
    154.16x
    
    
    
    135.16x




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
    
    consolidated pre-tax income before parent interest in income of subsidiaries and income
or loss from our equity investee;
    
    fixed charges;
    
    amortization of capitalized interest;
    
    distributed income of our equity investee; and
    
    our share of pre-tax losses of our equity investee for which charges arising from
guarantees are included in fixed charges.
  
    
    interest capitalized;
    
    preference security dividend requirements of consolidated subsidiaries; and
    
    parent interest in income of subsidiaries in pre-tax income of subsidiaries that have
not incurred fixed charges.