It is more than five years since the landmark structure – which links Avenham Park and Penwortham – was closed over safety fears.
The two authorities and the architect behind the project have also released new and detailed images of what the new bridge will look like.
1. Preston's 'new' Old Tram Bridge
By the time the new bridge opens, it will have been almost seven years since people have been able to cross the Ribble at that point Photo: Studio John Bridge Limited
2. Preston's 'new' Old Tram Bridge
The two piers that will sit in the river bed will have to be drilled two metres down into the rock Photo: Studio John Bridge Limited
3. Preston's 'new' Old Tram Bridge
The detail of the the bridge design can be seen for the first time in new CGI images that have been been released - and which are on display at Avenham Park's Pavilion Cafe Photo: Studio John Bridge Limited
4. Preston's 'new' Old Tram Bridge
Getting the new bridge in place will require one of the biggest cranes available in the UK Photo: Studio John Bridge Limited