Feb 9 (Reuters) - Whetstone Capital Advisors LLC
* "urges" Columbia Pipeline Partners unitholders to vote against merger with TransCanada corporation
* current $17.00 per unit merger "materially undervalues Columbia Pipeline partners"
* says owns approximately 1.2% of common units outstanding of Columbia Pipeline Partners LP
* believe fair value of CPPL is at least $20 per unit Source text for Eikon: Further company coverage: