This excerpt taken from the EDE 10-K filed Mar 10, 2006.
We have recently experienced, and may continue to experience, coal delivery shortfalls which could require us to reduce the output of our coal-fired generating facilities and lead to increases in our fuel and purchased power costs.
We depend upon regular deliveries of coal as fuel for our Riverton, Asbury and Iatan plants, and as fuel for the facility which supplies us with purchased power under our contract with Westar Energy. Substantially all of this coal comes from mines in the Powder River Basin of Wyoming and is delivered to the plants by railroad. In recent months, due to widespread railroad congestion problems, the railroads have been unable to achieve the delivery cycle times required to maintain our plants inventory levels. As a result, inventory levels at our plants have declined. We expect that the railroads congestion problems and resulting delivery delays will continue for an indefinite period. As a result, we have implemented coal conservation and supply replacement measures to retain adequate reserve inventories at our facilities. These measures have included, or may include in the future, reducing the output of these plants, increasing the utilization of our gas-fired generation facilities, purchasing power from other suppliers, adding additional leased trains to our supply system and purchasing locally mined coal which can be delivered without using the railroads. Such measures may result in increases in our fuel and purchased power costs and could have a material adverse effect on our financial condition and results of operations.