Two decades of electric rate increases in Iowa

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On March 29, 2002, Interstate Power and Light Company, a subsidiary of Alliant Energy Company, filed a request with the Iowa Utilities Board to increase Iowa electric rates by about 9.6%, which would've meant a revenue increase of $82 million. In the interim before a final decision, the IUB allowed for a temporary increase of 1.8% that went into effect on June 27.

Less than a year later, on April 15, 2003, that final number shaded upward to about 2.88%. 

Since then, Alliant Energy, doing business as IPL, has ratcheted up its proposed rate

increases. IPL has had at least five distinct requests for a permanent increase that have gone before the IUB since the 2003 increase and all of them have been for 5% or more.