The water in Lake Burley Griffin was returned to its normal level at 4pm yesterday.
Lake Burley Griffin was lowered in late 2011 to undertake major engineering works on Scrivener Dam.
At the normal lake level, Scrivener Dam holds back 33,000 megalitres of water, with a surface area of 664 hectares (approximately seven square kilometres). The full supply level will be maintained at 555.93 metres Australian Height Datum.
As well as providing a recreation resource, the lake has created important wetland habitats for native fish, birds and wildlife.
The major engineering works at Scrivener Dam involve the replacement of 120 anchor bolts, which provide structural support for the flap gates. The flap gates are opened in flood events to regulate the water level of Lake Burley Griffin.
The works are on schedule to be completed by March next year and are under budget.