The project is a road construction project with a total length of 7.47 kilometers connecting Dal-dong, Mokpo-si, Jeollanam-do, to Sinjang-ri, Aphae-eup, Sinan-gun. 

The total bridge length is 2.28km, and there are two special bridges.

The first offshore bridge (Dali-Yuldo Bridge) was a mixture of cable-stayed bridges and extradosed, and the second offshore bridge (Yuldo-Aphae Bridge) was planned as a slim-edge girder extradosed bridge. BANDI was in charge of the design of the Yuldo-Aphae Bridge, a slim-edge girder extradosed bridge, during the tender design phase.

 The main line bridge is a PSC girder bridge with a width of 18 meters for 5 lanes each way, and the interchange bridge is planned as 3 lanes each way with a width of 

11 meters, and we were responsible for the detailed design of the interchange bridge.

 In the previous phase of the project, the Yuldo-Aphae Bridge was initially planned as a PSC box girder bridge with a main span of 130 meters, which was somewhat short of the route requirements(142 meters wide) required by the Employer. The bridge type proposed in the tender design was extradosed bridge with the longest main span of 200 meters in Korea, and the structural concept of the cable-stayed bridge was introduced to optimize the bending moment of the bridge girder unlike the typical extradosed bridge.

 As a result, we were able to reduce the cost of not only the girders but also the piers and foundations by applying the slim-edge girder type instead of the general box girder type.

 On the other hand, due to the application of edge girders, the prestressing tendons used in the girders were determined through a somewhat more complicated process than for regular FCM girder bridges.

 For the installation of the stay cables, we adopted a separate anchoring method rather than a saddle method when installing the cables in the pylon, and a steel plate was inserted inside the pylon to cope with the tensile force caused by the cable tension. In order to fully transfer the tensile force of the cable to the steel plate,  we planned to pour the concrete of the pylon in two separate times, one before and one after the introduction of the cable tension.