A pedestrian bridge, above, is being installed to replace one that was swept away by fierce stormwaters last year, and the government is confident this one will not budge.

The footbridge that crossed the stormwater drain near the Yarra Glen and Melrose Drive in Curtin was torn free during a storm on December 12 last year.

It went on a wild one-kilometre ride, tearing up the concrete and stone of the stormwater channel before coming to rest in a twisted metal heap downstream.

A year on, Territory and Municipal Services crews are installing a replacement bridge, which has been specially reinforced to protect it from a future surge.

The new bridge will be open before Christmas.