EXHIBIT 12-1

MICHIGAN CONSOLIDATED GAS COMPANY AND SUBSIDIARIES
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(Thousands of Dollars)

|                                                        |                          |   |                     |         |                     |   |                     |         |  |   |         |         | 
|------------------------------------------------------- | ------------------------ | - | ------------------- | ------- | ------------------- | - | ------------------- | ------- |  | - | ------- | ------- | 
|                                                        |                          |   | Twelve Months Ended |         | Twelve Months Ended |   | Twelve Months Ended
|                                                        |                          |   |                     |         |                     |   |                    
|                                                        |                          |   | June 30, 2000       |         | December 31, 1999   |   | December 31, 1998  
|                                                        |                          |   |                     |         |                     |   |                    
|EARNINGS AS DEFINED (1)
Pre-tax income                  |                          | $ | 132,625             |         |                     | $ | 162,389             |         |  | $ | 114,619 |        
|                                                       
|                                                       
|                                                       
|                                                       
|Fixed charges                                           |                          |   | 61,851              |         |                     |   | 59,340              |         |  |   | 61,304  |        
|                                                        |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|                                                        | Earnings as defined      |   | $                   | 194,476 |                     |   | $                   | 221,729 |  |   | $       | 175,923 | 
|                                                        |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|FIXED CHARGES AS DEFINED (1)
Interest on long-term debt |                          | $ | 49,840              |         |                     | $ | 48,455              |         |  | $ | 47,091  |        
|                                                       
|                                                       
|                                                       
|                                                       
|Interest on other borrowed funds                        |                          |   | 9,659               |         |                     |   | 8,626               |         |  |   | 12,113  |        
|                                                       
|                                                       
|                                                       
|                                                       
|Amortization of debt discounts, premium
and expense     |                          |   | 1,122               |         |                     |   | 1,144               |         |  |   | 955     |        
|                                                       
|                                                       
|                                                       
|                                                       
|Interest implicit in rentals (2)                        |                          |   | 1,230               |         |                     |   | 1,115               |         |  |   | 1,145   |        
|                                                        |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|                                                        | Fixed charges as defined |   | $                   | 61,851  |                     |   | $                   | 59,340  |  |   | $       | 61,304  | 
|                                                        |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|Ratio of Earnings to Fixed Charges                      |                          |   | 3.14                |         |                     |   | 3.74                |         |  |   | 2.87    |        
|                                                        |                          |   |                     |         |                     |   |                     |         |  |   |         |        

Notes:



---

|(1) |  | Earnings and fixed charges are defined and computed in accordance with Item
503 of Regulation S-K.
|--- |  | --------------------------------------------------------------------------------------------------
|   
|   
|   
|   
|(2) |  | This amount is estimated to be a reasonable approximation of the interest
portion of rentals.     

MichCon is a guarantor of certain other debt. Fixed charges related to such debt
are deemed to be immaterial and therefore have been excluded from the above
ratios.