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ROBI NSON RICK <br />A Division of General Shale Brick <br />May 6, 2009 <br />Division of Reclamation, Mining and Safety <br />Colorado Department of Natural Resources <br />1313 Sherman Street. Room 215 <br />Denver, CO 80203 <br />115 <br />Ad. <br />CE <br />SAY '112009 <br />Division Ot Hec:amation, <br />-? Mi,hig and Safety <br />Attention: Mr. Jared Ebert <br />Subject: Robinson Brick Company Navajo Clay Mine (M-1993-004) <br />Stormwater Detention Pond Corrective Action Time Extension <br />Dear Mr. Ebert. <br />On September 22, 2008, Robinson Brick Company committed to construct the <br />stormwater detention pond at the Navajo Mine by April 30. 2009. We requested this <br />extension due to man power constraints and unfortunately the man power constraints <br />worsened during late 2008 and early 2009 as the economy continued to slump. <br />Currently, we are diligently working on constructing the stormwater detention pond dam, <br />which began on April 22, 2009. Once we complete building the dam.. we will excavate <br />the pond behind the dam followed by the construction of the inlet and outlet structures. <br />We anticipate that construction will be completed no later than June 5, 2009. Therefore, <br />we are respectfully requesting an extension of the correction date previously committed <br />in the letter dated September 22, 2008. <br />Please feel free to contact me with any questions or comments at (303) 783-3058. <br />Respectfully, <br />Robinson Brick Company <br />Jason E. McGraw <br />Mine Supervisor <br />1845 West Dartmouth Avenue • Denver, Colorado 80110-1308 <br />Phone: 303-783-3000 • Fax: 303-781-1818 • Toll Free: 800-477-9002 <br />www.robinsonbrick.com