Project Twin Streams is an umbrella name for a number of initiatives centred around two streams (Opanuku and Oratia) in the former Waitakere City Council area of Auckland

Auckland

The Auckland metropolitan area , in the North Island of New Zealand, is the largest and most populous urban area in the country with residents, percent of the country's population. Auckland also has the largest Polynesian population of any city in the world...

, New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

. It consists of a number of environmental and community initiatives and infrastructure, more or less loosely associated. These include wetland restoration, with a large component of volunteer work, partly to control floodwater effects coming down from the Waitakere Ranges

Waitakere Ranges

The Waitakere Ranges are a chain of hills in the Auckland metropolitan area, generally running approximately 25 km from north to south, 25 km west of central Auckland, New Zealand. The maximum elevation within the ranges is 474 m...

. The conservation works, both for the streams and the wider catchment, won second place in the International Thiess Riverprize in 2007.

Walk- and Cycleway

One of the most visible initiatives is the well-received Twin Streams Walk- and Cycleway, which allows residents and visitors to wander or ride most of the length of the two streams and some of their tributiaries.