Tennessee Valley Authority Coal Supply & Origination 1101 Market Street, MR 2A Chattanooga, Tennessee 37402-2801 CONTRACT SUPPLEMENT

Exhibit 10.21

Tennessee Valley Authority
Coal Supply & Origination
0000 Xxxxxx Xxxxxx, XX 0X
Xxxxxxxxxxx, Xxxxxxxxx 00000-0000

CONTRACT SUPPLEMENT

TO:		Xxxxxxxxx Coal Company, Inc.		Supplement Xx.		00
		0000 Xxxxxxx Xxxxxxxxx - 00xx Xxxxx		Date		December 8, 0000
		Xx. Xxxxx, Xxxxxxxx 00000		Group-Contract No.		612-40668
				Plant		Kingston

Attention: Mr. Xxxxxx Xxxxxx

This confirms the December 8, 2011, agreement reached between Xxxxx Xxxxxx of TVA and Xxxxxx Xxxxxxxx of Xxxxxxxxx Coal Company.

Train W499 was loaded on December 7, 2011, under Traffic Control Number 196218 with coal which reflected a total moisture content of 12.61 percent compared with the REJECT SPECIFICATION, contained in Section 9.0 of the Contract, of 12.00 percent for that component of the analysis. As agreed, TVA will accept this trainload of coal in consideration of a $0.50 per ton reduction in price. Also, the analysis results obtained on this shipment will be included in the quarterly quality adjustment calculations required under Section 8.0, Adjustment for Quality. TVA’s Accounts Payable organization will deduct $5,615.85 from Contractor’s account.

All other terms and conditions of the contract remain unchanged.

Please complete the acceptance below and return the copy of this contract supplement to this office. You should retain the original for your file.

In the event Contractor fails to execute this Supplement in the acceptance space provided below or fails to return such executed Supplement to TVA, shipment of coal to TVA following the date of Contractor’s receipt of this Supplement shall constitute an acceptance by Contractor of all the terms and conditions of this Supplement, unless within five (5) business days of the date of receipt of this Supplement, Contractor notifies TVA, both orally and in writing that this Supplement is not accepted.

Accepted		Xxxxxxxxx Coal Co.		Tennessee Valley Authority
		(Company)
By		/s/ Xxxxxx X. Xxxxxx		By	/s/ Xxxxxx X. Xxxxxxx
				Xxxxxx X. Xxxxxxx
				Asset Management Specialist
Title		President		/s/ Xxx X. Popoynak
				Manager, Coal Acquisition
Date		12/13/11

TVA RESTRICTED INFORMATION