1. The Defendant’s KRW 1,361,169,260 for the Plaintiff and 6% per annum from June 26, 2012 to August 28, 2015.

1. Basic facts

A. The Defendant, under the control of the Republic of Korea, requested the Public Procurement Service to conclude a contract for the disposal of domestic wastes and the installation of a high fuel production facility, and the bid process conducted by the Public Procurement Service, consisting of the Plaintiff Daewoo Construction Co., Ltd. (hereinafter “Treatment Construction”), and Tae Young Construction Co., Ltd. (hereinafter “ Tae Young Construction”), was selected as a successful bidder.

(2) On December 26, 2008, the instant contracting body concluded a construction contract with the Republic of Korea for the construction of the demanding administrative agency as the Defendant. On December 26, 2008, the instant contracting body concluded the construction work with the construction cost of KRW 14.3 billion, construction period from December 26, 2008 to May 20, 2010, with the construction cost of KRW 14.3 billion, and the construction work cost of the instant contracting body’s domestic waste disposal facilities (hereinafter “the instant construction work”). Hyundai Construction Co., Ltd. (hereinafter “Mod Construction”) under the instant contract with the joint and several liability of the instant contracting body as the joint and several liability of the instant contracting body under the instant contract.

(3) At the time of the conclusion of the instant contract, the instant joint contractor and the Republic of Korea agreed that the treatment capacity of the instant disposal facility shall be 90 tons/day (5 tons/day of domestic waste in the Dong and Dong area, 20 tons/day of large-scale waste crushing wood of the existing recycling line facilities, 15 tons/day of recycled scrap of the existing recycling line facilities, and 55 tons/day of solid fuels (hereinafter the above treatment capacity is referred to as “performance condition”).

(4) On May 20, 2010, the instant joint contractors and the Defendant, taking into account the modification following the additional installation of a large-scale waste storage yard, the date of completion of the instant construction project on May 31, 2010.