Shipments of limestone on the Great Lakes totaled 3,339,540 net tons in August, a decrease of 9.3 percent compared to July, but an increase of 9.5 percent compared to a year ago, according to the Lakes Carriers Association (LCA).
The trade was down 18.4 percent when compared to the month’s five-year average, according to LCA.
Loadings at U.S. ports were up 115,000 tons compared to a year ago. Shipments from Canadian docks increase by 176,000 tons.
Year-to-date the Lakes limestone trade stands at 17 million net tons, an increase of 27.2 percent compared to a year ago, but a decrease of 15.9 percent compared to the five-year average for the January-August timeframe.
Loadings at U.S. ports are up 31 percent compared to a year ago. Shipments from Canadian docks are 14.4 percent ahead of last year’s pace, according to LCA.
Great Lakes Limestone Trade: AUGUST 2005-2010 and 5-Year Average
(net tons)
|  | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | Average  | 
| U.S. Ports | 3,781,141 | 3,376,738 | 3,316,880 | 3,453,228 | 2,492,875 | 2,607,375 | 3,284,172 | 
| Canadian Ports | 900,286 | 944,981 | 650,200 | 994,039 | 556,113 | 732,165 | 809,123 | 
| Total | 4,681,427 | 4,321,719 | 3,969,087 | 4,447,267 | 3,048,988 | 3,339,540 | 4,093,295 | 
Great Lakes Limestone Trade: Year-To-Date 2005-2010 and 5-Year Average
(net tons)
|  | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | Average  | 
| U.S. Ports | 18,711,053 | 18,141,170 | 16,861,895 | 16,132,972 | 10,354,103 | 13,561,064 | 16,040,238 | 
| Canadian Ports | 4,801,504 | 4,953,944 | 3,821,975 | 4,303,713 | 3,013,842 | 3,447,826 | 4,178,995 | 
| Total | 23,512,557 | 23,095,114 | 20,685,877 | 20,436,685 | 13,367,945 | 17,008,890 | 20,219,233 | 
Source: Lake Carriers Association
U.S. ports: Calcite, Mich.; Cedarville, Mich.; Drummond Island, Mich.; Kellys Island, Ohio; Marblehead, Ohio; Port Inland, Mich.; and Presque Isle, Mich.. Kellys Island ceased operations in fall 2009.
Canadian ports: Bruce Mines, Manitoulin Island, Port Colborne, and Smelter Bay (all Ontario).
Port Colborne ceased shipping by vessel in 2006.









