This paper has a seepage measuring device installed on the water retaining wall at the bottom of the dam, but it has no seepage count and periodically uses underground water handling method to measure the level of seepage. Accordingly, observation of seepage quantities generated by the dam body is used as an important data to assess the safety of the dam body, so it is considered to improve the seepage quantity measuring device.

To have a rational maintenance Measures in masonry tunnel, the interaction matrix in PISD is adapted. Opinions from 22 experts in tunnel are applied to estimate the weight factor in risk analysis. 11 causes of masonry tunnel are evaluated for 163 sheets accounting for the limited budget and priority in risk.