Spreadsheet: tracy_geaccone__40263__NBPLStat Sum Rate Case Request
Sheet: Sheet1

2000
Rate Case |  |  |  |  | Northern Natural Gas |  |  |  | [NAME] |  |  |  | FGT Pre-Expansion |  |  |  | FGT Incremental/Expansion |  |  |  | Northern Border Pipeline
 |  |  |  |  | Current |  | Previous |  | Current |  | Previous |  | Current |  | Previous |  | Current |  | Previous |  | Current |  | Previous (3)
 | Date Effective |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12/1/99 |  | 3/1/96
 | Total Rate Base |  |  | $ |  | $ |  | $ |  | $ |  | $ |  | $ |  | $ |  | $ |  | $ | 1410 | $ | 1417
 | Long Term Debt |  |  | $ |  |  |  |  |  |  |  |  |  |  |  | $ |  | $ |  | $ | n/a | $ | 894
 | Allowed Return on Long Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | n/a |  | 0.0706
 | Equity |  |  | $ |  |  |  |  |  |  |  |  |  |  |  | $ |  | $ |  | $ | n/a | $ | 538
 | Allowed Return on Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.12 |  | 0.12
 | Average Depreciation Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0225 |  | 2.0% (4)
 | Throughput Volume - Transport (Tcf) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | n/a |  | n/a
 | Status of Rate Case |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | No Rate Case
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Until 11/01/05
(3) Prior to December 1, 1999 operated under a cost of service form of tariff.  Amounts are averages for the month of November 1999 as calculated under the former tariff.
(4) Prior to December 1, 1999 the depreciation rate for transmission facilities was 2%.
1999
Rate Case |  |  |  |  | Northern Natural Gas |  |  |  | [NAME] |  |  |  | FGT Pre-Expansion |  |  |  | FGT Incremental/Expansion
 |  |  |  |  | Current |  | Previous |  | Current |  | Previous |  | Current |  | Previous |  | Current |  | Previous |  | Current (3) |  | Previous
 | Date Effective |  |  |  | 11/1/93 |  | 5/1/89 |  | 11/1/96 |  | 1/1/93 |  | 11/1/97 |  | 1/1/92 |  | 3/1/97 |  | 3/1/95 |  | 3/1/96 |  | 12/1/92
 | Total Rate Base |  |  | $ | 714 | $ | 555 | $ | 398 | $ | 398 | $ | 275 | $ | 253 | $ | 978 | $ | 908 | $ | 696 | $ | 716
 | Long Term Debt |  |  | $ | 339 |  | n/a |  | n/a |  | n/a |  | n/a |  | n/a | $ | 626 | $ | 581 | $ | 390 | $ | 422
 | Allowed Return on Long Term Debt |  |  |  | 0.0894 |  | n/a |  | n/a |  | n/a |  | n/a |  | n/a |  | n/a |  | 0.0914 |  | 0.0807 |  | 0.0833
 | Equity |  |  | $ | 393 |  | n/a |  | n/a |  | n/a |  | n/a |  | n/a | $ | 352 | $ | 326 | $ | 475 | $ | 305
 | Allowed Return on Equity |  |  |  | 0.125 |  | n/a |  | 0.115 |  | 0.115 |  | 15.64% (1) |  | 0.115 |  | 13.66% (1) |  | 13.89% (1) |  | 0.12 |  | 0.1275
 | Average Depreciation Rate |  |  |  | 0.0118 |  | 0.0185 |  | 0.012 |  | 0.017 |  | 0.0213 |  | 0.025 |  | variable (2) |  | variable (2) |  | 2.5% (4) |  | 0.031
 | Throughput Volume - Transport (Tcf) |  |  |  | 1661 |  | 1525 |  | 334 |  | 334 |  | 272 |  | 329 |  | 168 |  | 146 |  | n/a |  | n/a
 | Status of Rate Case |  |  |  | New Rate Case Filed |  |  |  | No Rate Case Until |  |  |  | No Rate Case Until |  |  |  | No Rate Case Until |  |  |  | Filed May 1999;
 |  |  |  |  | May 1998; Discussions |  |  |  | November 2006 |  |  |  | October 2001 |  |  |  | October 2001 |  |  |  | Approval Pending
 |  |  |  |  | On-Going
(1) Pre-tax overall Return
(2) Straight line book depreciation of 4% is adjusted by levelisation factors yielding regulatory depreciation rates of negative 0.88% in 1995, negative 0.55% in 1996 and negative 0.86% in 1997.
(3) Operates under a cost of tariff.  Amounts are averages for the 12 month period ending December 31, 1998.
(4) Depreciation was reduced to 2.0% in December 1998 and, beginning in 2000, is scheduled to increase on an annual basis until it reaches 3.2% in 2002.