Yan Yean Reservoir

Yan Yean Reservoir is a water storage facility in Victoria, built in 1857, and the oldest water supply system in the region. The dam is an earthen and rock structure measuring approximately 10 meters (33 feet) high and stretching nearly 1,000 meters long, capable of holding over 30,000 megalitres of water. Water enters the system through rainfall and rivers flowing from nearby forests, while a protected catchment area surrounding the reservoir ensures water safety for drinking.

The reservoir was completed in 1857 and was the largest of its kind in the world at that time. Engineer James Blackburn, an English convict sent to Australia for theft, designed the structure, which took four years to build and represented a massive financial investment for the era.

The name Yan Yean comes from a local leader named Yan Yan who signed a treaty in 1835. The term means 'bachelor' or 'young male' in the language of the Wurundjeri people, who have cared for these lands for countless generations.

The reservoir and surrounding park are open daily from early morning until evening, with extended hours during daylight saving time. Walking paths are easy to follow, picnic areas with barbecue facilities are available, and toilets including accessible facilities, parking, and a playground near the Valve House are provided for visitors.

The designer James Blackburn was an English convict banished to Australia for theft, yet he created one of the largest structures of his time. The historic Caretaker's Cottage can be visited by arrangement with Parks Victoria and offers a glimpse into the daily lives of the early operators of this vital water system.