was extended to Beecroft and Wahroonga in 1918, superseding the Ryde Wahroonga Main which was now too small. A Pumping Station was erected at Wahroonga for the elevated tank (Wahroonga Reservoir (Elevated) WS 124 in 1935. New mains were constructed from Ryde to Wahroonga in 1937 for the new reservoir (Wahroonga Reservoir No. 3 WS 125), with connection to Pymble. Description The Reservoir (Elevated) WS 124), situated at 1678 Pacific Highway, is an unusual and unique reservoir in the Sydney Water Supply System. It has a cylindrical elevated riveted steel tank, with an original roof and a spherical or rounded base, all constructed in riveted steel plate. The reservoir is supported on an eight legged, H section, steel girder riveted frame, with horizontal and diagonal bracing. The top of the reservoir is reached by a stairway up the inside of the frame, with a walkway at the top of the frame (attached by triangular riveted plates) and a stairway to the roof of the reservoir. The whole structure is a fine example of riveted steel design and technology, surviving intact for more than 85 years. It is a prominent local landmark. Standard features include: davit, trigonometric station, access stairway, handrails and inlet and outlet valve chambers. Adjacent to the reservoir is a storage tank constructed with riveted steel plates. Directly opposite the site containing Reservoir (Elevated) WS 124, on the corner of Woonona Avenue and the Pacific Highway, is a large building with high brick walls, the "Woonona Avenue" site referred to in the heritage document. No indication of its purpose is given on the outside of the building. It probably houses the "pumping station" referred to in the History section, above. Significant plantings at 1678 Pacific Highway include: cypress, jacaranda and Illawarra flame tree. The full service level is and the capacity of the reservoir is . Modifications and dates The reservoir is in good condition and intact. Heritage listing As at 7 September 2016, Wahroonga Reservoir (Elevated) WS 124 is an unusual and unique reservoir in the Sydney Water Supply System. The whole structure is a fine example of riveted steel design and technology, surviving intact. It is a distinct local landmark. The reservoirs at Wahroonga demonstrate the variety of reservoir construction techniques used by the MWS & DB, the engineering expertise available to the Board as well as the growth in demand in the Northern Suburbs from