Who is columbia grain international? Columbia Grain International, LLC is a mid-sized, full-service grain company in the grain and pulses business. We are headquartered in Portland, OR, and own/operate 45+ elevators and offices throughout WA, ID, MN, MT, and ND to support our domestic and export sales program.Who is acccolumbia grain? Columbia Grain Inc. is a long time established full service grain company in the grain and legume business. We are headquartered in Portland, Oregon and own/operate over 45 elevators and offices throughout WA, ID, MT, ND and MN to support our domestic and export sales program. We are a mid-size company with over 240 employees overall.How do i get a line of credit with grain? Just sync your current debit card and use Grain as you would a credit card. Grain analyzes your income and instantly offers you a revolving line of credit. Sign up with any of the 10,000+ banks we support. Get instant access to a revolving line of credit - without impacting your credit.