Pounds under contract  (in thousands) Average price per pound   December 31, 2011 Zinc Lead Zinc Lead Contracts on provisional sales  2012 settlements 21,164 5,732 $ 0.86 $ 0.89 Contracts on forecasted sales  2012 settlements 45,195 35,053 $ 1.12 $ 1.12 2013 settlements 18,243 24,582 $ 1.14 $ 1.17 As further discussed in  Note 18 , production at the Lucky Friday mine was temporarily suspended due to the requirement to remove built-up  cementitious material from the Silver Shaft. As a result, during the first quarter of 2012, we liquidated forward contracts related to forecasted Lucky  Friday base metal sales for total net proceeds of $3.1 million. Our concentrate sales are based on a provisional sales price containing an embedded derivative that is required to be separated from the host  contract for accounting purposes. The host contract is the receivable from the sale of the concentrates at the forward price at the time of the sale. The  embedded derivative, which does not qualify for hedge accounting, is adjusted to market through earnings each period prior to final settlement. We discover, acquire, develop, produce, and market concentrates and doré containing silver, gold, lead and zinc. Our products consist of both  metal concentrates, which we sell to custom smelters, and unrefined bullion bars (doré), which may be sold as doré or further refined before sale to  precious metals traders. We are currently organized and managed by two segments, which represent our operating units: the Greens Creek unit and  the Lucky Friday unit. General corporate activities not associated with operating units and their various exploration activities, as well as discontinued operations and idle  properties, are presented as “other.” Interest expense, interest income and income taxes are considered general corporate items, and are not  allocated to our segments. Sales of metal concentrates and metal products are made principally to custom smelters and metals traders. The percentage of sales contributed by  each segment is reflected in the following table: NoTE 11: BuSINESS SEgMENTS AND SIgNIFICANT CuSToMErS Year ended December 31,  2012 2011 2010 Greens Creek  100.0% 71.8% 74.8% Lucky Friday  —  28.2%  25.2% 100%  100%  100% 2012 2011 2010 Net sales to unaffiliated customers: Greens Creek $ 320,895 $ 342, 906 $ 313,318 Lucky Friday 248  134,728  105,495  $ 321,143  $ 477,634  $ 418,813  Income (loss) from operations: Greens Creek $ 138,245 $ 181,116 $ 138,973 Lucky Friday (25,179) 75,608 48,639 Other (75,200)  (59,079)  (239,167) $ 37,866  $ 197,645  $ (51,555) Capital additions (including non-cash additions):  Greens Creek $ 62,184 $ 41,657 $ 18,280 Lucky Friday 55,998 60,454 54,370 Other 11,760  35,274  2,089  $ 129,942  $ 137,385  $ 74,739  Depreciation, depletion and amortization:  Greens Creek $ 43,522 $ 41,013 $ 51,671 Lucky Friday —  6,053  8,340  $ 43,522  $ 47,066  $ 60,011  Other significant non-cash items:  Greens Creek $ 4,037 $ 2,326 $ 17,829 Lucky Friday 92 14 5,053 Other 33,922  31,470  57,651  $ 38,051  $ 33,810  $ 80,533  Identifiable assets: Greens Creek $ 741,666 $ 729,289 $ 740,573 Lucky Friday 226,196 213,285 170,928 Other 410,428  453,516  470,992  $ 1,378,290  $ 1,396,090  $ 1,382,493  F-26 [ HL:10-K ]  The tables below present information about reportable segments as of and for the years ended December 31, 2012, 2011 and 2010 (in thousands).