- Clearing headponds and hydro channels for Bay of Plenty Electricity at Lake Aniwhenua
- Removal of 200,000m3 of sands and gravels from the Poutu Channel for Electricorp in 1981
- Dredged 45,000m3 of sediments from Lake Te Whaiau and Otamangakau Canal for Electricorp in 1982
- Removal of 120,000m3 of sands and gravels from the Poutu Channel for Electricorp in 1990
- Clearing 60,000m3 of sediment from Lake Hinemaiaia for Taupo Electricity in 1994
- Dredging 90,000m3 of sediments from Lake Te Whaiau and Otamangakau canal for Genesis Energy in 1995
- Removal of 150,000m3 of sands and gravels from the Poutu Channel with pumping distances of up to 3000m for Genesis Energy in 1996
- Clearing headponds and channels for Mighty River Power above the Aratiatia Hydro Power Station in 1999
- Dredging 100,000m3 of sediment from Otamangakau for Genesis Power Ltd in 2001
- Removal of 30,000m3 of sands from Lake Aniwhenua for Bay of Plenty Electricity in 2002
- Removal of 150,000m3 of sands and gravels from the Poutu Channel with pumping distances of up to 3km for Genesis Power in 2003
- Dredging 75,000m3 of sediment from Lake Hinemaiaia for Trustpower in 2004
- Dredging 80,000m3 of sediment from Lake Hinemaiaia for Trustpower in 2011
- Removal of 100,000m3 of sands and gravels from the Poutu Channel with pumping distances of up to 2.5km for Genesis Power in 2013
