Project

Content

Water Source

Main Stream：Danshui River

Tributary：Beishi River, tributary of Xindian River

Effective Water Storage

(cubic meter)

Type of Dam

Double curvature variable thickness concrete arch dam

Function

Water supply to Taipei metropolitan area and with a subsidiary 70000 KW power plant

Overview

The Feitsui Reservoir is located only 30 kilometers from Taipei City. Dam safety is very important. Therefore, an effective dam surveillance program including periodic instrumentation observations, on-site inspections and timely evaluations has been established to ensure public safety.

Responsibility:

1.Inspection of the main dam and its pertinent facilities.

2.Maintenance of the main dam and its pertinent facilities.  

3.Dam behavior monitoring.

4.Dam safety evaluation.

5.Keeping and renewing the technical data book.

Inspection

Inspection and maintenance are critical to dam safety. All equipment is periodically inspected to ensure that it is properly functioning, and regular maintenance is conducted. We have established a database to inventory all inspection and maintenance records.

Assessment

There are 381 sets of 17 different types of instruments embedded within the structure, the foundation and abutments of the dam. These instruments monitor the structural behavior of the dam and physical foundation under different loading conditions. They also may help detect and analyze potential problems that might occur. All of the observation records are stored in a computer database to serve as a basis for further analysis, timely evaluation and study. For assuring the structural integrity and operational adequacy of major civil works structures following the occurrence of significant earthquakes, the Institute of Earth Sciences of the Academia Sinica is in charge of seismic observations.  

Main Structure

The Feitsui Dam is the largest concrete dam in Taiwan, and is a three-centered, double curvature variable thickness arch dam, which stands 122.5 m high and 510 m long with a concrete volume 700,000 m3. Main structures of the reservoir include the main dam, the auxiliary dam, the plunge pool and the power plant. The reservoir has a series of water releasing facilities. It includes the crest spillway, tunnel spillway, sluiceway, permanent river outlet, and penstock of power plant.