Anti-Wall Street demonstrations disrupted grain loading at an export terminal in Portland, Oregon, but facilities elsewhere in the key grains shipping corridor reported no disruptions, industry sources said.

Demonstrators have marched on several West Coast ports, blocking roads and seeking to hamper port operations in a bid to call attention to US economic inequalities.

Columbia Grain Inc. (CGI) chose not to call in unionized workers, who technically are hired on a daily basis by the company, in anticipation of the well-advertized protests, a trade source said, asking not to be named.

The workers, represented by the International Longshore and Warehouse Union, had been expected to likely stand in solidarity with the Occupy protesters so CGI managers decided over the weekend not to hire the daily labor.

CGI currently has a soybean vessel waiting to be loaded and hopes to resume loading the cargo ship, he added.

"There's business in the port so, obviously, if this goes more than a day it would become a bigger issue," he said.

Grain terminals elsewhere in the U.S. Pacific Northwest, the second largest port range where about a quarter of all U.S. grain and oilseed exports exit the country, did not report any disruptions. (Reuters)