You can easily migrate projects to AutoCAD Civil 3D 2013 from previous versions. Projects must be migrated to AutoCAD Civil 3D 2013 before they can be opened.
You must log in to Vault from the Prospector tree before the project migration command is available. For projects created in AutoCAD Civil 3D 2007 to 2010, both the project and associated Survey databases (including equipment and figure databases) must be migrated before they can be opened. Projects containing databases requiring migration are indicated with the out of date icon 
.
To migrate a Civil 3D project from AutoCAD Civil 3D 2007-2010
- In Toolspace, on the Prospector tab, right-click the Projects collection.
- Projects that require migration are indicated with the out of data icon. Right-click on a project that requires migration, and select Migrate.
- A warning dialog displays and indicates that migrated projects are not backwards-compatible with previous versions of AutoCAD Civil 3D 2013. Click Yes to continue.
The selected project and associated databases are checked out, migrated, then checked back in with an incremented version.
To migrate a Civil 3D project from AutoCAD Civil 3D 2006 or earlier
- In Toolspace, on the Prospector tab, right-click the Projects collection.
- Click Migrate Pre-Civil 3D 2007 Project.
- In the Select Civil 3D Project Folder To Migrate dialog box, browse to the project folder to be migrated.
- Select the folder that contains the project and click Open.
The new project is created on the Vault server in the database that you are logged in to.