Jan 9 (Reuters) - Whitehaven Coal Ltd WHC.AX
* issuing revised production guidance for its narrabri longwall operation but remains on track to achieve its group 2017 saleable production guidance of 21mt to 22mt.
* whitehaven remains on target to achieve its fy2017 saleable production guidance range.
* Revised guidance arises from production impacts associated with safely managing a discrete area of adverse geotechnical conditions at mine
* new full year rom coal guidance for narrabri is in range of 7.5mt to 7.8mt. Source text for Eikon: ID:nASX56X7Tr Further company coverage: WHC.AX