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Major Projects

Porters Creek Dam

An $8.5 million upgrade to Porters Creek Dam has been officially opened, half a century after the dam was constructed in 1967.

Porters Creek Dam The Porters Creek Dam Upgrade is now complete.

Introduction

The dam provides approximately 30% of Southern Shoalhaven’s drinking water supply and has a reservoir capacity of 1,900 mega litres. Porters Creek Dam is 11 kilometres west of Lake Conjola in Morton National Park.

In commemoration of this historic event a time capsule is being prepared to be placed onsite. Some of the items included in the time capsule are project schematics, a time lapse video of the project unfolding, drone footage of the local area, and general merchandise of the day including a magazine showcasing the Shoalhaven.

View a video of the first heavy rainfall over the dam

History of Porters Creek Dam

Laurie AndrewA young 17-year-old named Laurie Andrew started his working life at that time as a trainee surveyor with GHD on the original dam project.

Fifty years later that same Laurie Andrew works for Shoalhaven City Council and acted as Council’s site supervisor for the upgrade. Mr Andrew said “back in 1967 just getting to the dam was a hassle and to get from one end of the bush to the other you carried a brush hook and an axe”.

Remediation Project

Construction of the Porters Creek Dam remediation was completed in November 2016 with Shoalhaven Water successfully delivering this critical project on time and under budget. The upgrade was engineered by Gutteridge Haskins and Davy (GHD) and constructed by Leed Engineering and Construction.

The local residents were also consulted during the planning phase and during construction. Considerable consultation and development was required to ensure that the Project addressed obligations identified in the Review of Environmental Factors (REF); particularly the Construction Environmental Management Plan (CEMP).  

View a time lapse video of the new dam construction

The construction work involved the batching and pouring of 4,500 cubic metres of concrete on site to form the new buttress type dam wall. A stilling basin was constructed to control the velocity and turbulence of water entering the downstream waterway, and a sophisticated survey network was established to monitor any movement in the dam wall during construction. The network remains in place for future monitoring of the wall.

Following some dry weather the rain finally arrived in March 2017 and the dam proceeded to fill. The new dam had its first spill on Saturday 18 March

Project Photo albums