Hundreds of local businesses are expected to meet contractors today to see if they can work together to build the biggest prison in Wales and England.
Pending planning approval, the work at the site in Wrexham should start this summer. £250m is being invested in the development.
Prisons Minister Jeremy Wright and Secretary of State for Wales David Jones will visit the former Firestone factory site where the prison is scheduled to be built.
They will also meet with local companies and the prime contractors bidding for the construction contract.
Some people living in the local area oppose the plans for the 'super-prison' saying it will have a negative effect on the community.
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Plenty of fine dry weather to come today and prolonged spells of sunshine. A cool easterly breeze will take the edge off the temperatures.
The three-day event in the Welsh capital is expected to attract more than 20,000 visitors.