Inventories

9 Months Ended

Sep. 30, 2011

Inventories

Inventories

7.     Inventories

Inventories are valued principally at the lower of cost, determined using the average cost method, or market.   Costs for raw materials and finished goods include materials, labor, and production overhead.   Inventories consisted of the following (in thousands):

	September30, 2011		December 31, 2010
Lime and limestone inventories:
Raw materials	$	3,340	$	3,669
Finished goods	992		2,087
	4,332		5,756
Service parts inventories	5,171		4,844
Total inventories	$	9,503	$	10,600