X0202 4 2006-05-16 0001057058 WASTE CONNECTIONS INC/DE WCN 0001064310 DUPREAU EUGENE V 35 IRON POINT CIRCLE SUITE 200 FOLSOM CA 95630 1 0 0 0 Common Stock 2006-05-16 4 M 0 14450 18.53 A 126160 D Common Stock 2006-05-16 4 S 0 14450 39.965 D 111710 D Common Stock 2006-05-17 4 M 0 2655 18.53 A 114365 D Common Stock 2006-05-17 4 S 0 2655 39.9776 D 111710 D Common Stock 2006-05-17 4 M 0 15402 21.75 A 127112 D Common Stock 2006-05-17 4 M 0 3200 24.93 A 114910 D Common Stock 2006-05-17 4 S 0 3200 39.9776 D 111710 D Common Stock 2006-05-18 4 M 0 21300 24.93 A 133010 D Common Stock 2006-05-18 4 D 0 21300 39.9082 D 111710 D Common Stock 2006-05-17 4 S 0 15402 39.9776 D 111710 D Employee Stock Option (Right to Buy) 18.53 2006-05-16 4 M 0 14450 0 D 2003-07-18 2012-07-18 Common Stock 14450 2655 D Employee Stock Option (Right to Buy) 18.53 2006-05-17 4 M 0 2655 0 D 2003-07-18 2012-07-18 Common Stock 2655 0 D Employee Stock Option (Right to Buy) 21.75 2006-05-17 4 M 0 15402 0 D 2004-02-20 2013-02-20 Common Stock 15402 0 D Employee Stock Option (Right to Buy) 24.93 2006-05-17 4 M 0 3200 0 D 2005-02-03 2014-02-03 Common Stock 3200 49300 D Employee Stock Option (Right to Buy) 24.93 2006-05-18 4 M 0 21300 0 D 2005-02-03 2014-02-03 Common Stock 21300 28000 D Option for 51,314 options, 1/3 exercisable 7/18/03, 7/18/04 and 7/18/05. This option was previously reported as an option for 34,209 shares of common stock at an exercise price of $27.80 per share, but was adjusted to reflect the 50% stock dividend declared by WCI on May 25, 2004, which was payable on June 24, 2004, to all holders of record of common stock on June 10, 2004. Accordingly, on June 10, 2004, the date the stock dividend was paid, the option became exercisable for 51,314 shares at an exercise price of $18.53 per share. The zero in table 2, item 8 is required by the EDGAR software and should be disregarded. Option for 55,403 options 1/3 exercisable 2/20/04, 2/20/05 and 2/20/06. This option was previously reported as an option for 36,935 shares of common stock at an exercise price of $32.62 per share, but was adjusted to reflect the 50% stock dividend declared by WCI on May 26, 2004, which was payable on June 24, 2004, to all holders of record of common stock on June 10, 2004. Accordingly, on June 10, 2004, the date the stock dividend was paid, the option became exercisable for 55,403 shares at an exercise price of $21.75 per share. Option for 52,500 options 1/3 exercisable 2/3/05, 2/3/06 and 2/3/07. This option was previously reported as an option for 35,000 shares of common stock at an exercise price of $37.40 per share, but was adjusted to reflect the 50% stock dividend declared by WCI on May 26, 2004, which was payable on June 24, 2004, to all holders of record of common stock on June 24, 2004. Accordingly, on June 10, 2004, the date the stock dividend was paid, the option became exercisable for 52,500 shares at an exercise price of $24.93 per share. Eugene Dupreau 2006-05-18