The Glenelg Gates FACT SHEET | April 2014

The Glenelg Gates structure was built across the mouth of the Patawalonga Lake at Glenelg North in the late 1960s to stop the sea tide entering the lake area and to let stormwater out to the gulf. The site is located approximately 9km from the Adelaide Central Business District and 2km south east of Adelaide Airport. The Glenelg Gates structure forms part of the Patawalonga Lake System (PLS) that maintains a sea water lake and manages the discharge of stormwater from the Patawalonga catchment into Gulf St Vincent.

The Glenelg Gates structure: The Glenelg Gates Upgrade Project • is a barrier to high tides, preventing any potential flooding The Glenelg Gates Upgrade Project will improve the gate of the adjoining areas; structure and its operating mechanisms, including maintenance • is the major stormwater outlet for the greater Patawalonga access, at a cost of approximately $3.2 million. The project is catchment, south of Adelaide; being undertaken in addition to the ongoing operations and • is the inlet for seawater circulation through the maintenance activities. Patawalonga Lake; The primary objectives of this project are to extent the safe • provides a thoroughfare for pedestrians and cyclists and reliable operation of the Glenelg Gates for at least another between Holdfast Marina and Glenelg North; 20 years. It will also improve safety for maintenance staff and public, and will reduce maintenance costs of the gates in the • adjoins a boat lock that is the only entry and exit point future. It will also improve pedestrian facilities significantly and for marina berths in the Patawalonga Lake. the appearance of the site. The Glenelg Gates and the operating mechanism are old and During the upgrade project, the concrete structures including degraded. The structure is in need of an upgrade in order to corbels and counterweights will be repaired, two of the gates ensure the continued safe and reliable operations of the gates. will be rehabilitated, the public walkway will be replaced and the gates themselves will be sealed and painted. The project will also include the construction of a second walkway over the adjoining boat lock funded by the City of Holdfast Bay. (See the diagram 1.)

Diagram 1: upgrade details Construction period and restrictions Partner organisations

In order to ensure the gates still cater for storm events, The Glenelg Gates Upgrade Project is funded by the State only one or two bays will be repaired at any given time. Government. With the exception of the boat lock, the Glenelg The construction works are scheduled to take approximately Gates structure is owned and operated by the Department of three months. A temporary walk way will be installed on the other Environment, Water and Natural Resources (DEWNR). The boat side of the gates before the existing walkway is replaced in order to lock is owned and operated by the City of Holdfast Bay. minimise disruption for pedestrians and bicycle users. Installation of the temporary walkway is scheduled for early May 2014.

The temporary walkway may have to be closed for short periods of Need more information? time to allow for safe construction. Advance notices will be placed at the site before any closure of the temporary walkway. Rajiv Mouveri Patawalong Lakes System Project Manager Please note that pedestrian access at the gates will be GPO Box 1047, Adelaide, SA 5001 restricted from Tuesday, 22 April 2014 to Thursday, 24 April to allow for electrical works to be carried out in preparation for T: 8204 8577 the Glenelg Gates Upgrade Project. The gates are scheduled to E: [email protected] be sealed and painted during June 2014. www.naturalresources.sa.gov.au/adelaidemtloftyranges There will also be restrictions to the boat lock during the construction period. Details of the restrictions are available from the nearby Glenelg Marine shop, which services the marina. Temporary site arrangements are shown in Diagram 2. If you require more details of the construction program, please telephone 8204 8577.

Diagram 2: Temporary site arrangements

FIS 92806