OVERLAND PARK, Kan. - April 10, 2008 - Tortoise Energy Infrastructure Corp. (NYSE: TYG) today announced that it has determined to exercise its option to designate the next succeeding rate period for its $70 million Series D Auction Rate Senior Notes, Due 2047 (CUSIP: 89147LAD2) (the "Series D Tortoise Notes") as a special rate period (the "Special Rate Period"). The terms of the Special Rate Period are set forth below.

The Special Rate Period will commence on April 22, 2008 and will continue through and including April 24, 2008. The rate for the Special Rate Period will be set at the next regular auction for the Series D Tortoise Notes, which will occur on April 21, 2008. The rate shall remain fixed for the duration of the Special Rate Period. The company will, not later than 3:00 p.m. New York City time on April 18, 2008, notify the Auction Agent of its intent to proceed with the designation of the Special Rate Period.

As separately announced today by the company, it intends to redeem all of its Series D Senior Notes.

About Tortoise Energy Infrastructure Corp.

Tortoise Energy Infrastructure Corp. owns a portfolio of master limited partnership investments in the energy infrastructure sector. Tortoise Energy Infrastructure Corp.'s goal is to provide its stockholders a high level of total return with an emphasis on current distributions.

About Tortoise Capital Advisors

Tortoise Capital Advisors, LLC is a pioneer in capital markets for master limited partnership (MLP) investment companies and a leader in closed-end funds and separately managed accounts focused on MLPs in the energy sector. As of March 31, 2008, the adviser had approximately $2.6 billion of assets under management. For more information, visit our Web site at www.tortoiseadvisors.com.

Safe Harbor Statement

This press release shall not constitute an offer to sell or a solicitation to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer or solicitation or sale would be unlawful prior to registration or qualification under the laws of such state or jurisdiction.

Contact information: Tortoise Capital Advisors, LLC Pam Kearney, Investor Relations, (866) 362-9331, pkearney@tortoiseadvisors.com