This excerpt taken from the BKH 10-K filed Mar 16, 2006.
Review Black Hills Powers Rate Structure for our Residential, Commercial and Industrial Customers While Retaining the Flexibility to Selectively Market Excess Generating Capacity Off-System to Maximize Returns in Changing Market Environments. Through a settlement with the SDPUC Black Hills Power has been under a retail rate freeze since 1995. The rate freeze agreement terminated on January 1, 2005. The rate freeze preserved Black Hills Powers low-cost rate structure at levels below the national average for our retail customers while allowing us to retain the benefits from cost savings and wholesale off-system sales. This has provided us with flexibility in allocating Black Hills Powers power supply resources to maximize returns in changing market environments. We have historically optimized the utilization of Black Hills Powers power supply resources by selling wholesale power to other utilities and to power marketers in the spot market and through short-term sales contracts. Absent any request for a rate change by us or the SDPUC, rates will remain unchanged from those in place during the rate freeze. We will continue to monitor our rate structure and when appropriate, we will file a rate case.