State lawmakers Friday approved the plan to replace the Alaskan Way Viaduct with a deep-bored tunnel.

The Senate voted 39-9 to accept a controversial House amendment that was added Wednesday that would require Seattle property owners to pay for any cost overruns on the tunnel construction, a $4.3 billion project.

The bill now goes to Gov. Chris Gregoire for approval.

The amendment would require property owners in Seattle to pay for any excess expenses beyond the $2.8 billion dollars that the state receives from taxes and tolling.

In a failed vote on Wednesday, the amendment squeaked by with a 49-47 roll call vote.

However, Mayor Greg Nickels along, with Seattle lawmakers, senators and council members, found the amendment to be unclear on how to differentiate who would actually be required to pay and how. Because the state will be in charge of the construction contracts for the tunnel it is still in question on how private property owners will be taken into account for overrun charges.

However, Seattle voters will get to vote on any city-wide property taxes before they are enacted.

The seattlepi.com reported that taxing districts are prohibited from increasing bills by more than 1 percent annually without asking for permission.