Exhibit 10.6 SINKING FUND COLLATERAL ACCOUNT AND PLEDGE AGREEMENT THIS SINKING FUND COLLATERAL ACCOUNT AND PLEDGE AGREEMENT, dated as of March 17, 2004 (as the same may be amended, modified, supplemented or restated from time to time, this...Sinking Fund Collateral Account and Pledge Agreement • July 7th, 2004 • American Rock Salt Co LLC • New York
