Several kilograms of brass has been discreetly stripped from benches, bollards, bins, taps and drinking fountains at Canberra's newest park.

Henry Rolland Park, on the shores of Lake Burley Griffin, was unveiled only four months ago as part of the Government's project to revitalise the West Basin precinct.

But now the picnic facilities, benches and outdoor fitness equipment have a little less shine.

According to the ACT Government, brass elements were removed from 26 benches, 21 bollards, three bins, two drinking fountains and one tap.

The theft, with an estimated damage bill of $100,000, would appear to have required significant time, effort and planning — despite its discreet nature.

In some cases, benches would have to have been partially deconstructed and put back together in order to remove the brass.

Benches missing their brass arms would almost go unnoticed if you didn't look closely. ( ABC News: Isaac Nowroozi )

Police are seeking witnesses or any dashcam footage of the theft, which could have taken place anytime between Wednesday morning and Thursday afternoon.

The City Renewal Authority said it was now looking at ways to restore the equipment without using brass.

It was also looking at the possibility of adding security cameras to the area.

"In similar other public spaces [CCTV] has proven to act a deterrent," chief executive Malcolm Snow said.

"It is disappointing that someone would steal public assets and vandalise the park, created for the enjoyment of everyone."

Anyone with information about the incident has been urged to contact police.