Tariffs Recent Filings PGA Summaries Iowa Electric Workshops Supplemental Information Electric Gas Btu Factors Cost of Gas Distribution Charges Energy Efficiency Exit Fees Firm Supply Standby Service Gas Retention Factors Imbalance Cashout Rates Imbalance Charges Interruptible Commodity Prices ISR Margin Manufactured Site Clean-Up RTP Illinois Rider 17 Customer Generation

Supplemental Information Gas: Exit Fees Navigator Exit Fees: 2008 | 2007 | 2006 Gas Transportation Rates - System Exit Fees 2007 Iowa (East & West Systems) - Rider 2 (PDR) and Rider 4 (PTR) Pipeline Demand Rider (PDR) Pipeline Transition Rider (PTR) Effective Date (Month/Year) 70, 87, 90, SGS, SVF & MVF ($/Therm) LVF* SVI & LVI ($/Therm) SVF & MVF ($/Therm) LVF ($/Therm) SVI & LVI ($/Therm) Demand Charge per Contract Demand ($/Therm) Commodity Charge ($/Therm) January 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 February 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 March 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 April 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 May 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 June 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 July 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 August 2007 .07705 .72445 .00000 .00000 .00000 .00000 .00000 September 2007 .07432 .72445 .00000 .00000 .00000 .00000 .00000 October 2007 .07432 .72445 .00000 .00000 .00000 .00000 .00000 November 2007 .07604 .75106 .00000 .00000 .00000 .00000 .00000 December 2007 .07604 .75106 .00000 .00000 .00000 .00000 .00000 * The LVF commodity rate includes the PTR exit fee. Continue to charge the PTR exit fee to customer    after cessation of the PDR exit fee. Nebraska - Rider 2 (PDR) and Rider 4 (PTR) Pipeline Demand Rider (PDR) Pipeline Transition Rider (PTR) Effective Date (Month/Year) SVF & MVF ($/Therm) LVF* per Contract Demand ($/Therm) SVI & LVI ($/Therm) SVF & MVF ($/Therm) LVF ($/Therm) SVI & LVI ($/Therm) January 2007 .06659 .72445 None .00000 .00000 None February 2007 .06659 .72445 None .00000 .00000 None March 2007 .06659 .72445 None .00000 .00000 None April 2007 .06659 .72445 None .00000 .00000 None May 2007 .06659 .72445 None .00000 .00000 None June 2007 .06659 .72445 None .00000 .00000 None July 2007 .06659 .72445 None .00000 .00000 None August 2007 .06659 .72445 None .00000 .00000 None September 2007 .06479 .72445 None .00000 .00000 None October 2007 .06479 .72445 None .00000 .00000 None November 2007 .06029 .75106 None .00000 .00000 None December 2007 .06029 .75106 None .00000 .00000 None * PDR for LVF includes PTR charge. Continue to charge the PTR exit fee to customer after cessation of    the PDR exit fee. South Dakota - Rider 2 (PDR) and Rider 4 (PTR) Pipeline Demand Rider (PDR) Pipeline Transition Rider (PTR) Effective Date (Month/Year) SVF, MVF & LVF* ($/Therm) SVI & LVI ($/Therm) SVF, MVF & LVF ($/Therm) SVI & LVI ($/Therm) January 2007 .06969 None .00000 None February 2007 .06969 None .00000 None March 2007 .06969 None .00000 None April 2007 .06969 None .00000 None May 2007 .06969 None .00000 None June 2007 .06969 None .00000 None July 2007 .06969 None .00000 None August 2007 .06969 None .00000 None September 2007 .06668 None .00000 None October 2007 .06668 None .00000 None November 2007 .06888 None .00000 None December 2007 .06888 None .00000 None * PDR for LVF includes PTR charge. Continue to charge the PTR exit fee to customer after cessation of    the PDR exit fee. Illinois - Rider 5 - Transition Costs Sales or Transport Customers in Service on March 23, 1994 and Prior Applicable Rate (Total Cost) Sales or Transport Customers in Service on March 24, 1994 and After Applicable Rate (GSR Only) Effective Date (Month/Year) Per Therm Per Therm January 2007 .0000 .0000 February 2007 .0000 .0000 March 2007 (.0001) .0000 April 2007 .0000 .0000 May 2007 (.0001) .0000 June 2007 .0000 .0000 July 2007 (.0001) .0000 August 2007 .0001 .0000 September 2007 (.0002) (.0001) October 2007 .0001 .0000 November 2007 (.0003) (.0001) December 2007 .0003 .0001 Navigator Exit Fees: 2008 | 2007 | 2006 For Your Home | For Your Business | Safety | Rates | Energy Efficiency | Economic Development | Environmental Efforts About Us | Careers | News Room | Storm Center | Wind Energy | Contact | Streetlight Repair Request | System Outage Watch | Energy Choice | For Contractors | For Landlords | ©2008 MidAmerican Energy Holdings Company. All rights reserved.