With the 10-year anniversary of the 2004 floods approaching Horizons Regional Council is taking stock of all the work done to protect communities from similar situations.
Chief executive Michael McCartney said the floods were the biggest most people in the region had seen, and caused widespread damage.
"It's estimated that the economic impact on the region was to the tune of $300 million, with over $24 million of this suffered by our erosion and flood control schemes," he said.
"Another noteworthy figure is the 200 million tonnes of soil estimated to have been lost downstream, leaving over 300,000 hectares of our hill country severely eroded."
After 2004 the regional council looked for ways to protect communities from future floods.