Patterson River
Patterson River
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Patterson River

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Patterson River

The Patterson River is a partly man-made, tidal urban river of the Port Phillip catchment in the Australian east coast state of Victoria, located in the outer southeastern suburbs of the Greater Melbourne region. Under the name "Patterson", it is the shortest river in Victoria at only 6 km (3.7 mi) in length, although its main stem tributary and de facto upper section, the Dandenong Creek, is over 53 km (33 mi) long.

The river has only two sites of bridge crossings along its entire course, being traversed by the Mornington Peninsula Freeway (and the adjacent Wells Road) at its middle section at Patterson Lakes, and by the combined bridges of the Nepean Highway and the Frankston railway line at the junction of Bonbeach and Carrum less than 180 m (200 yd) above its mouth. There are no ferry services across the river, but the river is navigable to private boats (both human- and engine-powered) that can be deployed from various marinas, docks and ramps along the river.

The man-made river was constructed in 1878 as the Patterson Cut to assist the drainage of coastal swamplands located in what is now the suburb of Carrum. The headwaters of its two main tributaries, Dandenong Creek and Eumemmerring Creek, both originate in the Dandenong Ranges, and the "Patterson"-named section only refers to the lower reach formed after the confluence of the two creeks southwest of Bangholme, approximately 35 kilometres (22 mi) southeast of Melbourne CBD. The river then flows generally southwest (picking up numerous minor drainage channels) and drops to a lower level at a weir and fishway underneath the Mornington Peninsula Freeway, before emptying into Beaumaris Bay, an eastern bight of Port Phillip Bay, just 2 km (1.2 mi) north of the Seaford Wetlands. The waterway descends merely 5.4 metres (18 ft) over its 5-kilometre (3.1 mi) course, and provides boat access to canals and marinas in the suburbs of Patterson Lakes, Carrum and Bonbeach.

As one of the few designated safe harbours on the city side of the bay, the Patterson River is the most popular boating gateway to Port Phillip Bay.[citation needed] The thriving canal system of the Patterson Lakes residential area and the wet and dry storage at the Patterson Lakes Marina combine with four public boat ramps to make an extremely busy waterway.

In 1866, the Carrum Carrum Swamp was surveyed and the land between Mordialloc Creek and Keast Park in Seaford was divided into 18 allotments and sold by auction for around three pounds per acre. In 1871 the government opened it for selection. The swamp was an impediment to the settlers and there was much discussion on how to reclaim the land, the first contracts for drainage works commenced in 1873. Attempts to reclaim the lower swamplands were ineffective. In 1876 it was decided to cut a 10-metre (33 ft) wide channel to Port Phillip Bay through widening and deepening Carrum Creek. It was to be known as the "Patterson Cut" and was named after Sir James Patterson KCMG, at the time the Victorian Minister for Public Works; and later Premier.

The suburb of Patterson Lakes was to be located in Carrum on what was originally part of the Carrum Carrum Swamp. The Carrum Carrum Swamp was drained in 1879 when the Patterson Cut (formed in 1876), and other drainage measures were undertaken to prevent flooding of the Eumemmering Creek, which overflowed into the Carrum Carrum Swamp. When the Patterson Cut was dug the area that is now occupied by Patterson Lakes was turned to farmland with mainly dairy cattle. By the late 1960s farming activities had just about ceased, and the area was popular with fox and rabbit shooters.

In 1974 the first soil was turned in the preliminary stages of the development of Patterson Lakes, where sites for housing and apartments overlooking the marina and the river were identified. A canal system called the Tidal Canal and the Quiet Lakes were developed, where the Tidal Canal adjoined to the Patterson River.

Indigenous floral species along the Patterson River include the silver wattle, lightwood, blackwood, black she-oak, river red gum, spike wattle, hedge wattle, scrub she-oak, jagged fireweed, silvertop wallaby grass, Australian salt-grass and the blue tussock grass. Non-indigenous floral species include the sheep's burr, angled onion, lesser joyweed, broom spurge, common swamp wallaby grass, pointed centrolepis, common spikerush and small spikerush.

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