1. The Defendant (Counterclaim Plaintiff) is 4,952,585 won and 5% per annum from April 27, 2017 to August 30, 2018.

A principal lawsuit and counterclaim shall also be deemed a principal lawsuit and counterclaim.

1. Facts of recognition;

A. On February 25, 2015, the Plaintiff entered into a contract with Gwangju Metropolitan City for electrical construction of the C Water-Quality Purification Facility (hereinafter “instant electrical construction”) and completed the said construction on January 5, 2017.

The contractual completion date of the instant electrical construction is January 20, 2017.

B. According to the “inline Regulations”, where electric lines are installed by the method of directly laying underground underground, the depth of underground lines should be at least 1.2 meters in the place where the pressure of vehicles or other weight is likely to be applied to the other place, and at least 60cm in the other place. Of the execution drawings of the instant electrical construction, the depth of electric cables installed at a level of at least 60cm in the construction specifications of the instant electrical construction works, and the depth of artificial cables installed at a level of at least 80cm in depth. The Plaintiff, while performing the instant electrical construction, laid the electric power plant at a point of 80cm in depth

C. The Defendant received a subcontract from Nonparty D Co., Ltd. (hereinafter referred to as “D”) for the installation of the exchange equipment for the C riverbed facilities (hereinafter “the instant exchange equipment installation”). On January 12, 2017, the Defendant destroyed one meter meter according to the design drawings and damaged part of the electrical construction section completed by the Plaintiff from the control team to the pumps (hereinafter “instant accident section”) to the 225 meters of the electrical construction section completed by the Plaintiff.

(hereinafter referred to as “instant accident”) D.

The electrical construction specifications of this case provide that cable interim connection shall not be allowed without the approval of the supervisor, and the "inbound line regulations" provide that the 'inbound line regulations' shall not cause any damage to the clothes, and in principle, not less than six times the diameter of the cable completion (eight times for the core). The construction works of this case by Gwangju Metropolitan City and the supervision team, which are the ordering agency, shall be not less than six times the diameter of the cable (eight times for the core).