Feb 16 (Reuters) -
* Mantle Ridge LP - sent a letter to the CSX board of directors
* Mantle Ridge LP - have been standing by since last week for constructive counterproposals and "we are ready to discuss them as they arrive"
* Mantle Ridge LP - requesting only a single Mantle Ridge representative on CSX board
* Mantle Ridge LP - neither Hunter Harrison nor the other board slots discussed represents mantle ridge in any way Further company coverage: