TDOT says the company contracted to renovate the Henley Bridge is running into more problems.
Initially, crews say they thought they'd need about 200 cubic feet of concrete for repairs to a few of the piers, but after further testing the piers for potential damage, they say they'll now need up to 1700 feet.
Additionally, TDOT says it is re-evaluating how significant the damage is.
Crews shut down the bridge nearly a year ago.
TDOT says construction has fallen 18% behind schedule, causing the contractor to miss out on a $1 million dollar bonus for not finishing the project by December 31.
The original project schedule had clean-up beginning on the project by late June of 2013.
TDOT officials say they have not discussed a time extension at this point.