Geologic image in the Kentucky Geological Survey data repository.Image Name: Mill Creek Power Station, Louisville Image Date: 9/21/2004 Category: photo_culture Source: Carey, Dan Format: JPG Size (MB): 0.5 Pixel Dimensions: 3292 x 1396 Description: Large cities such as Louisville require great amounts of electricity. Louisville Gas and Electric�s Mill Creek Power Station on the Ohio River is a 1600 megawatt coal-fired plant. The flue-gas desulfurization unit at the plant produces half a million tons of gypsum annually as a byproduct that is shipped by barge to a wallboard plant. Photograph by Bart Davidson, Kentucky Geological Survey.