Penciled on back - Surge-chamber in course of construction also framework of tunnel.

Written on back with blue ballpoint pen – Mr & Mrs W. H. Walker.

This photo used in book – ‘An eye for country, the life and work of Leslie Adkin’ between pages 112 & 113, & dated as having been taken 20 May 1923.

Mangahao Hydro-electric Scheme, 1920’s 1 Sepia tone photo print – Fragile

Surge chamber, showing outlet to penstock pipes with Mr & Mrs Bill Walker. See also – #.0013

This photo used in ‘Leslie Adkin book’, between pages 112 & 113.

Any use of this image must be accompanied by the credit “Horowhenua Historical Society Inc.”

Penciled on back - Exit of tunnel from main dam, Mangahao into Arapeti basin.

Written on back with black ballpoint pen - H. [?] Walker in entrance.

Mangahao Hydro-electric Scheme, 1920’s 1 Sepia tone photo print – Fragile

Exit of tunnel from main dam (Lower Mangahao Dam) into Arapeti Reservoir. Bill Walker in entrance.

Any use of this image must be accompanied by the credit “Horowhenua Historical Society Inc.”

Charges of gelignite are placed in the holes when the rods are withdrawn.

Photo from NZED collection.

The intake tunnel with Mr Williams, the tunnel contractor, on left.