It was the biggest contributor to inter-Korean trade and provided the North with much-needed hard currency.
During previous periods of inter-Korean tension, North Korea has threatened to close the project.
Mr. Obama will also visit the inter-Korean border known as the demilitarized zone, or DMZ, which every president has done since Ronald Reagan.
On Monday the widows of a former South Korean president and a former South Korean business tycoon crossed the inter-Korean border for a trip to Pyongyang to pay condolences.
Meanwhile, South Korea said the North appeared to have cut the inter-Korean phone link at the border village of Panmunjom, through which the two sides communicate on issues along the border.
Separately, South Korea said the North appeared to have cut the inter-Korean phone link at the border village of Panmunjom, through which the two sides communicate on issues along the border.
He has tried South Korea: two years ago a summit in Pyongyang with South Korea's president, Kim Dae-jung, ended with promises of large dollops of South Korean aid in return for greater contact across the inter-Korean divide.
Kurt Campbell, the former top U.S. diplomat for Asia, told reporters at a forum in Seoul that there was substantial concern with the way Pyongyang has treated what was supposed to be a venue to improve inter-Korean relations.
The new South Korean government has separated humanitarian aid from nuclear weapons negotiations, and President Park Geun-hye has patiently held out an olive branch in the form of her "trustpolitik" policy, which promises step-by-step efforts to stabilize inter-Korean relations.
There were issues between the team and big Korean eSports organizations, inter-team drama, cross-team drama and an overall loss of player interest.
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