In this study, we selected the discharge stations with a high probability of error occurrence using a logistic regression model, and evaluated the appropriateness of the evaluation level of the discharge station proposed by MOLIT (Ministry of Land, Infrastructure and Transport) through the case analysis of the maintenance. As a result, among the class A stations proposed by MOLIT, stations occurred frequent errors in the regression model and case analysis of the maintenance are Janghowon, Heungcheon, Bupyeong station. Therefore, this discharge stations are considered to be a station where the adjustment of evaluation level of MOLIT is needed. The purpose of this study is to produce more stable observation data by priority stations selection and managing maintenance to cope with increasing number of discharge stations with limited manpower and equipment.