A 20m by 15m area was fenced for, and dedicated to, the squad and would be further enhanced in coming weeks, coach Maude O'Connell said.
The space was added to Cromwell College's existing aquatic centre at McNulty Inlet, and meant rowers could easily train for competitions.
"Up until now the boats have been on a trailer and stored in commercial buildings in Cromwell, from which we have had to move them to the lake [Dunstan].
"Now the crew can be on the water at 6am because the boats are right there," Mrs O'Connell said.
Cromwell contractors had supplied materials, tools, and labour at no cost to develop the enclosure, which would also include a concrete ramp into Lake Dunstan and covered racks to store boats, she said.
Eventually, it would have capacity to store about 10 boats.
"It's been amazing.
"People just heard about us needing a better space and made it happen."
Mrs O'Connell said this was the second year Cromwell College had a representative rowing squad, and its members were seriously committed to the sport.
They trained at least four times a week, often from 6am, in preparation for the South Island and New Zealand secondary school rowing championships in March, she said.
