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Cleaning up Pukekura Park's mucky lakes could cost nearly $1 million more than was estimated four years ago.
The New Plymouth District Council's Monitoring Committee last night voted to increase the budget for cleaning up the park's lakes and overall water quality from $1.2m to $2.08m.
Parks boss Mark Bruhn said the change was necessary because the last estimate for the work had been undertaken four years ago.
A new estimate done after the 2012-2022 Long Term Plan was finalised concluded the work would cost $2.08m over the next four years.
The work to clean up the park's main lakes includes the creation of a wetland beside Struan Walkway to trap sediment before it enters the park's waterway and the construction of a forebay in the Bowl of Brooklands lake to do the same.
Once these projects are complete, work will begin on getting the sediment out of the lakes. The contracts for that are expected to go out for tender in March next year with work to take place between June and September.
A council report on the park's water quality said progressive urban development in the park's wider catchment area since the 1950s was behind the degradation of its water quality.
In some parts of the main lake, sediment is more than one metre deep.
The park's lakes were excavated from former swamps for swimming and aquatic sports in 1876.
The water improvement project is being paid for from the council's renewal fund of money set aside each year to cover depreciation of its assets.
- © Fairfax NZ News
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