Linton Park detention dam upgrade begins next week
22 October 2021
Work to rebuild and modernise the stormwater detention dam in Linton Park is set to begin after Labour weekend
The six month project is part of a wider programme of works planned across Rotorua to enable more residential growth, mitigate existing stormwater issues and prepare for the effects of climate change.
Contractors Downer will begin the rebuild work and access to this area will be restricted for a period of about six months. Safety fences will be erected to ensure the public do not enter the construction site or access roads.
Infrastructure & Environment DCE Stavros Michael says the rebuild will ensure the dam meets modern safety standards and will better protect people, property and the environment downstream from the effects of stormwater in periods of severe weather.
“The current dam was built some 25 years ago and since that time, best practice and dam engineering standards have significantly tightened. We need to ensure that the dam in Linton Park will protect the community and the environment if and when a significant flood event happens in Rotorua.”
“This work is just one part of a 30-year strategy to invest in infrastructure in Rotorua. Council is committed to ensuring that this city is able to grow to meet the needs of our increasing population, and to ensure that we have reliable and sustainable infrastructure that will be resilient as we experience the increasing frequency of severe weather events due to climate change.”
The top of the bund, or the edge of the dam, is a popular walking route for people in the community, and the area where stormwater ponds inside the dam makes up part of the natural wetlands in the reserve. Its current length is about 420 metres long and is about 3 metres above the ground in most places. Where the Mangakakahi Stream flows under the dam, an aluminum culvert allows the water to flow through its natural course downstream to Lake Rotorua.
To meet current safety standards, the dam will need be raised and extended within the reserve. The spillway also needs to be replaced and constructed out of concrete to ensure safe operation. Once complete, the dam bund will extend past the carpark on Pedlar Street, on the Mount View Road edges of the reserve, and the overall height will be raised by up to 2.6 metres.
The upgraded dam is designed to manage stormwater during a 100 year storm event and safely manage flows beyond this. Water will only pond in the reserve in large events and will not fill higher than the ground level of surrounding properties.
As part of the work to rebuild the dam, Council’s Sports, Recreation and Environment team have been considering ways to enhance the reserve while the rebuild is taking place. Those considerations include removal of exotic or pest plant species and planting more natives, extra drainage for sportsfields, restoration of wetland areas, upgrades to nearby play spaces and new connections to existing shared paths to better connect nearby residential areas.
During construction, access to parts of the reserve will be restricted to ensure the safety of the public. Large vehicles and machinery will need to enter and exit the park via Nairn Road. This route uses the least local roads with the fewest directly affected properties. Signage and traffic management will be in place during the construction period.
The carpark at Pedlar Street will also be used for site management buildings during the construction period.
There will also be times when walkways and shared paths through the reserve will be closed. Council encourages people to follow all safety instructions on signage and from contractors.
The work is expected to take at least six months and be complete March 2022.
Letters and fact sheets have been sent to residents, property owners and businesses in the neighbourhoods surrounding Linton Park East (reserve area between Edmund Road and Old Taupo Road).
For more information about this project, including Frequently Asked Questions head to www.rotorualakescouncil.nz/stormwater