Our facilities are subject to environmental regulatory and permitting requirements for which we must demonstrate compliance. In addition, environmental agencies routinely inspect our facilities through scheduled and unannounced visits. During these visits they inspect physical facilities and monitor our compliance with regulatory requirements, permit limits and recordkeeping obligations. Whenever agencies identify concerns, we proactively work with them to address those issues in a timely fashion to their satisfaction.
In 2014, the Louisiana Office of Conservation issued a fine of $3,400 at our Dolet Hills Mine for insufficient storm water runoff controls. AEP mine management resolved the issue implementing a compliance improvement plan and holding meetings with the Louisiana agency to reaffirm our commitment to compliance.
One of many voluntary actions we take to help drive performance improvement is the use of an internal Environmental Performance Index for our generation business. We recorded two incidents in 2014, the smallest number since we launched this index in 2003. The index monitors incidents for opacity, water quality permits and oil and chemical spills at our power plants. It is an example of how we continuously focus on improving our performance by reducing our environmental impacts.
In our Transmission business, we implemented a new mandatory compliance training program in 2014 to ensure all transmission-related construction projects are built in full compliance with environmental permit requirements.