The TAT-9 cable entered service in 1992 and was retired in 2004.
It is understood that at least a section of the cable near the coast has been recovered from the seabed to reduce the hazard to vessels which fish the area. It is not known what length was recovered. Further information
Modern maps have not been found which show the route of the cable, but a mariners chart dated 2003 (prior to the decommissioning) shows the landing point on the south side of Poldhu beach near Mullion in Cornwall.
The map below is further confirmation of the TAT-9 landing point (taken from this document).
Information on the internet generally confirms that the cable landing station for TAT-9 was Goonhilly.
There is interest in the reuse of the remaining portions of the TAT-9 cable for ocean monitoring. Further information and significant technical details of the cable and its repeaters can be found in this review pdf.