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Waitaki Dam Drainage Enhancement

Waitaki Dam Drainage Enhancement

Waitaki Dam Drainage Enhancement

CASE STUDY

CASE STUDY

CASE STUDY

Project header Project header Project header

Elevation of foundation drainage looking upstream

Client

Meridian Energy Limited

Location

Waitaki Dam, Waitaki River, New Zealand

Project Category

Dam Remediation, Earthquake Engineering, Contract Documentation, Hydro Electricity, Dam Design and Construction, Structural and Civil

Services

  • Condition assesment appraisal
  • Design of upgraded and new foundation drains in the Hornell Gallery
  • Construction supervision

Retaining wall anchor drilling

Waitaki Dam

Project Overview

Waitaki Dam is 36.5m high and 354m long and retains 40 million m3 of water. It is a curved gravity dam, with the powerhouse structure forming the right abutment of the dam.

The project comprised the upgrading of the dam foundation drains located within the dam gallery.

The purpose of the drainage enhancement works is to reduce the uplift forces acting on the dam and thereby improve the performance of the dam for extreme earthquake and post-earthquake loading scenarios. The enhancement works will also improve the dam's performance under usual and flood loadings.

130
Drainage Holes
9,000 m
Length of Drainage Drilling
13
Stressed Anchors
127 m
Length of Stressed Anchors