Alex Lee (left) and Graeme White at work in the Groynes

Ranger Malcolm Campbell on the suspension bridge at the Groynes.

Ranger Malcolm Campbell with native growth at the Groynes.

The suspension bridge crossing the waterways at the Groynes.

Lex Stock, Groynes head ranger, clearing weeds from the ...

A group of friends at the Groynes. Pictured, from front to back, ...

Paul Yeo, Jill Overeem, Lynn Surgenor and Tricia Hewett stop for ...

Railway and road bridge over the Waimakariri River.

A jet boat and Waimakariri Gorge bridge.

The Waimakariri River during a flood, with the two bridges ...

The old railway and road bridges across the Waimakariri River.

Aerial view of a section of the Waimakariri River.

A pile of shingle on the edge of the Waimakariri River.

Workers laying a willow end groyne on the Waimakariri River.

A car parked beside the river at Waimakariri Gorge.

View of Waimakariri Gorge.

View of people boating on the Waimakariri River.

Stone wall of Sutton Quay at Lyttelton

Cells at the former Lyttelton jail

The remains of Lyttelton prison.

The remains of the cells at Lyttelton prison.

Lyttelton Museum member, F.Y. Conradie unveils a plaque to mark ...

Exterior of Lyttelton Prison.

Mike Taylor (left) and David Bain, coopers at Ferrymead.