Districts may extend project limits without a CO if all the following conditions are met.

Transition or tie-in work is less than 1,500 feet
The work has a value of less than $50,000
No changes made to unit bid prices
The scope of work remains the same
The funding category remains the same
No new control section jobs (CSJ) are required
No additional environmental clearance is necessary

If all the above conditions are not met, then a CO must be submitted for DE approval, regardless of the amount. Be sure to maintain the integrity of the competitive bid process.