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Interoffice Memorandum <br />To: Rob Zuber <br />From: Zach Trujillo <br />Subject: Colowyo — Renewal Review - Section 4.09 <br />Date: 5/10/2012 <br />••• <br />After my review of Colowyo's permit, I find the permit in compliance with the following sections: <br />1. 4.09.1 —All sections under 4.09.1 for have been addressed in Colowyo's permit. <br />4.09.1(11) — Under Technical Revision 64, approved 10/17/2006, Colowyo Coal Company L.P. is no longer <br />required by the Division to submit monitoring reports for the Streeter Excess Spoil Fill and the Section 16 Excess <br />Spoil Fill. <br />2. 4.09.2 —All sections under 4.09.2 have been addressed in Colowyo's permit. <br />3. 4.09.3 — None of Colowyo's excess spoil fills are considered head -of- hollow fills. The standards and additional <br />requirements for 4.09.3 do not apply. <br />4. 4.09.4— No Durable Rock Fills exist in Colowyo's permit. Any standards and additional requirements for 4.09.4 <br />do not apply. <br />This concludes my comments for Colowyo Renewal Review. If you have any questions or would like me to look at any <br />additional items within Colowyo's permit, please let me know. <br />Thanks, <br />Zach <br />