[153] Unless otherwise noted, the material in this section is derived from: Selden, _Div Staff Rpt_; _PacFlt EvalRpts_ No. 4, Chap. 9, No. 5, Chap. 8; 1stMarDiv, 1st EngrBn ComdDs, Jun-Jul 52. Logistical support of the division and wing remained largely unchanged through July. Several modifications did take place, however, and these were: (1) The change of responsibility for logistical support of ground-based units in Korea from Commanding General, 2d Logistical Command to the Commanding General, Korean Communication Zone (CG, KComZ). (2) The opening of a pipeline system for resupply of aviation fuel at K-3, beginning in May. (3) The beginning of increased support for airbase maintenance at those airfields housing Marine squadrons. Resupply of common items used by both Marine and Army units was still being hampered by the Marines’ limited knowledge of the Army supply system in effect and by their inability to obtain the catalogues, orders, and directives essential for requisitioning. Two logistical operations, both of an engineering nature, took place between May and July 1952 in western Korea. One was Operation TIMBER, undertaken to provide lumber required to complete the bunker construction on the JAMESTOWN, WYOMING, and KANSAS lines. The division had estimated that three million linear feet of 4 x 8-inch timbers would be needed. Since lumber in this amount was not available through supply channels or standing timber in the division sector, Corps assigned the Marines a wooded area 50 miles to the east in the U.S. 45th Infantry Division sector. On 12 May a reinforced engineer platoon, under Second Lieutenant Roger E. Galliher, a truck platoon, and 500 Korean Service Corps (KSC) laborers,[154] began the cutting, processing, and hauling of timbers which were then trucked to the railhead. Between 500 and 1,000 logs were cut daily. When the operation ended in July a total of 35,194 sections of timber had been cut. This was still not enough lumber to complete the required construction. Eighth Army then made up the difference, mostly with 12 x 12-inch timbers 30 feet long; these the Marine engineers cut to 4 x 8s for standard bunker construction.[155] [154] The KSC was a ROK quasi-military organization for logistical support of the UNC. Personnel were drafted from those rejected for Army service. Each KSC unit had a cadre of ROK officers and enlisted. All types of labor except personal services were performed by these Koreans. During its period in western Korea, the 1st Marine Division was supported by the 103d KSC Regiment of 5,222 men. CG, 1stMarDiv, _Civ Afrs and KSC_, pp. 8–9. [155] Col Harry D. Clarke ltr to Hd, HistBr, G-3 Div, HQMC, dtd 1 Sep 66.