Cromwell bridge and Clutha River
before flooding now completely submerged
The original town of Cromwell was demolished for the purpose of making a
hydro electric dam, forming Lake Dunstan, now 26.4 square kilometers in
size. Lucky for divers the town´s original historic steel girder bridge
(1864) supported by stone pillars and spanning over the original river
bed was left standing.
The site is located at the junction of the Clutha and the Kawarau
rivers.
The town Cromwell was founded 1863 after gold miners announced the
discovery of a phenomenally rich goldfield just downstream from the
junction of the rivers. After the gold rush Cromwell became known as a
farming and fruit growing centre and is now known as the "Fruit bowl of
the South".
When the Clyde Dam was completed in 1992, the valley behind it was
flooded to create Lake Dunstan. As a result, the original site of
Cromwell's historic business district at the junction of the Kawarau and
Clutha Rivers now lies at the bottom of the lake.
The top of the bridge now lies 10 metres below the
surface and maximum depth to the bottom of the riverbed is about 40
metres.