A Canadian man admitted to organizing a drug-smuggling operation, paying his co-conspirators and personally transporting thousands of pounds of marijuana from Canada into the United States.

In a Syracuse courtroom Tuesday, Colin Stewart, 41, of Elgin, Quebec, pleaded guilty to conspiracy to distribute marijuana. Stewart and his partners brought large amounts of the drug across the St. Lawrence River in the Akwesane Mohawk Indian reservation and distributed it through the northeastern U.S.

“Stewart admitted to organizing the smuggling, to the paying of co-conspirators, and to personally transporting thousands of pounds of marijuana across the St. Lawrence River from Canada into the United States,” said a press release from U.S. Attorney Grant Jaquith of the Northern District of New York and Special Agent in Charge James Hunt of the U.S. Drug Enforcement Administration’s New York Division.

Stewart’s plea agreement would have him serve 11 years and three months months in prison when he is sentenced on Aug. 7. The sentence is subject to approval from Chief U.S. District Judge Glenn Suddaby, who is presiding over the case. Assistant U.S. Attorneys Katherine Kopita and Douglas Collyer are the prosecutors.

The investigation and Stewart’s prosecution was the result of a joint effort from the DEA, Homeland Security Investigations, U.S. Border Patrol, U.S. Customs and Border Protection Air and Marine Operations, the New York State Police, the St. Regis Mohawk Tribal Police Department, the Akwesasne Mohawk Police Services and the district attorneys of Franklin and Clinton counties.