Morrison Construction today started work on the white water canoe centre for the London 2012 Olympic Games.
The on-time start-up on site means the Olympic Delivery Authority has hit all its foundation targets in the big build of venues and infrastructure for the 2012 Games.
ODA chairman John Armitt described it as a “significant achievement”.
The new facilities at Broxbourne will include a 300m course, warm-up course and finish lake.
Mr Armitt said: “The start of work at Broxbourne shows we are hitting our targets not just on the Olympic Park but across the 2012 project. We are making good progress but there will continue to be tough challenges ahead and we are not complacent.”
After the Games the venue will be and be used by the community and as a training facility.