International Rail Road Systems

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| name = International Rail Road Systems

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| headquarters = Fruitvale, British Columbia

| marks = IRRS

| locale = West Kootenay, British Columbia

| start_year = {{Start date|1998}}

| end_year = {{End date|2010}}

| predecessor_line = Nelson and Fort Sheppard Railway (BNSF)

| successor_line = Nelson and Fort Sheppard Railway Corp.

| gauge = {{Track gauge|ussg|allk=on}}

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The International Rail Road Systems {{Reporting mark|IRRS}} was a Canadian short line railway company operating in the West Kootenay region of southeastern British Columbia.

In 1998 the International Reload Systems subsidiary International Rail Road Systems leased the Columbia Gardens–Salmo section of the original Nelson and Fort Sheppard Railway from Burlington Northern and Santa Fe Railway (BNSF). North of Parks was abandoned that year. The railway has operated one EMD GP9 locomotive.{{Cite web |url=http://www.trainweb.org/rosters/IRRS.html |title=International Rail Road Systems - IRRS Information |website=www.trainweb.org}} A decade later, Fruitvale–Parks was abandoned.{{Cite web |url=https://www.grandforks.ca/wp-content/uploads/bulletinPDF/Short_Line_Railway_Business_Case.pdf#page=12 |title=City of Grand Forks: Short Line Railway Business Case, 2010 |website=www.grandforks.ca}} In 2010, ATCO Wood Products, the primary user, purchased the section, which was renamed the Nelson and Fort Sheppard Railway Corporation in 2012.

Interlining to the south was BNSF initially, replaced by Kettle Falls International Railway from 2004,{{Cite web |url=http://www.trainweb.org/rosters/KFR.html |title=Kettle Falls International Railway - KFR Information |website=www.trainweb.org}} and St. Paul & Pacific Northwest Railroad from 2019.{{Cite web |url=http://www.trainweb.org/rosters/STPP.html |title=St. Paul & Pacific Northwest Railroad - STPP Information |website=www.trainweb.org}}