The limiting factor for storage cavern injection and withdrawal rates is typically the stability of the hanging brine string, the pipe that protrudes from the wellbore into the cavern. Brine string failures can occur due to buckling or from interference with the casing at the top of the cavern as the pipe swings in an uncontrolled manner through the cavern; failures are very expensive and can lead to product release. A project has been underway in the PRCI Underground Storage Committee to characterize brine string dynamics at full scale via a test of an instrumented brine string under live field conditions. The project is now soliciting external support via a JIP format, with details provided in thesolicitation document found here. If sufficient incremental funding is obtained, testing could be initiated in the 4th quarter of 2013 at Enterprise Products in Mont Belvieu, TX.