North Korea reportedly planned that the missile base at Wŏnsan be capable of handling missiles that can strike US military bases in Japan and Guam, which implies the base could launch Nodong and/or Paektusan-1 missiles. This facility was still under construction as of July 2001. According to defector Im Yŏng Sŏn, this facility is a long-range missile launch base. There is some speculation that Wŏnsan missile base is an underground Nodong base.

Sources:
[1] "Tokyo Shinbun, 'Puk Missile Kiji Kŭkbi Hwakch'ung'," Donga Ilbo, 9 September 1998, www.donga.com;
[2] "Puk, Hambuk'e chiha Missile Kiji Kŏnsŏl: Tokyo Shinmun Podo," Donga Ilbo, 8 September 1998, www.donga.com;
[3] Han Sŭng Tong, "Puk Hambuk Hwadae'e Missile Chihagiji/7 Kot Ch'uga Kŏnsŏlchung," Hankyoreh Shinmun, 9 September 1998, in KINDS, www.kinds.or.kr.