X0303 4 2010-02-01 0001057058 WASTE CONNECTIONS, INC. WCN 0001132334 HANSEN ERIC 2295 IRON POINT ROAD SUITE 200 FOLSOM CA 95630 0 1 0 0 Vice President and CIO Common Stock 2010-02-01 4 F 0 528 32.41 D 15340 D Represents shares withheld by the Company from an award of restricted stock units in satisfaction of the applicable withholding taxes due as a result of the vesting of those restricted stock units, through an automatic share withholding procedure. Pursuant to this procedure the Company withholds, as the units vest, a portion of the vested shares issuable under the award with a fair market value (measured as of the vesting date) equal to the amount of such withholding taxes. Eric Hansen 2010-02-03