Matrix Design Group, LLC ("Matrix") has announced an advanced technology mine lighting product, UVision, which combines LED and safe spectrum UV for the first time in a mine-duty lighting system. This patent-pending technology not only delivers 50% brighter LED light, but the custom-developed LED array better illuminates reflective materials on clothing, helmets, machinery, storage boxes, cables and other marked mine items for higher visibility and greater contrast; dramatically improving the safety benefits of reflective materials.

Historically, reflective materials have relied on standard mine lighting for visibility. Not until UVision has a light been developed to make them truly stand out, whether viewed directly or through Matrix’s camera systems. In particular, when installed on mobile equipment, UVision provides the operator with additional peripheral and enhanced direct illumination which could improve operating efficiency and provide the operator with an additional tool to help avoid collisions.

UVision lights fit standard round enclosures, making staff retraining and equipment restocking unnecessary. Matrix also offers UVision lighting in its similar XP enclosure (pending MSHA-approval) and non-XP housing. Moreover, UVision, which can be integrated with machine control systems to provide enhanced functionality like automatic red reverse lighting, offers all these elements for about the same cost as traditional LED lights. UVision is not just brighter, its better.

To learn more about UVision, please visit www.MatrixTeam.com.

About Matrix Design Group, LLC

Matrix is an ISO 9001 certified designer, developer and marketer of safety and productivity technology for use in mining and industrial applications. Its innovative, industry-leading systems include proximity detection, communications, tracking, mine atmospheric monitoring, lighting, and cameras. Headquartered in Newburgh, Indiana, Matrix has offices in Lexington, KY, Johannesburg, South Africa and service locations throughout its mining regions. Matrix is a subsidiary of Alliance Resource Partners, L.P. (NASDAQ: ARLP).

About Alliance Resource Partners, L.P.

ARLP is a diversified producer and marketer of coal to major United States and international utilities and industrial users. ARLP, the nation’s first publicly traded master limited partnership involved in the production and marketing of coal, is currently the second largest coal producer in the eastern United States with mining operations in the Illinois Basin and Appalachian coal producing regions.

ARLP currently operates eight mining complexes in Illinois, Indiana, Kentucky, Maryland and West Virginia as well as a coal-loading terminal on the Ohio River at Mount Vernon, Indiana. ARLP also generates income from a variety of other sources, including investments in oil and gas mineral interests and gas compression services.

News, unit prices and additional information about ARLP, including filings with the Securities and Exchange Commission, are available at http://www.arlp.com. For more information, contact the investor relations department of ARLP at (918) 295-7674 or via e-mail at investorrelations@arlp.com.