FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * DUPREAU EUGENE V   2. Issuer Name and Ticker or Trading Symbol WASTE CONNECTIONS INC/DE [WCN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 35 IRON POINT CIRCLE, SUITE 200 3. Date of Earliest Transaction (Month/Day/Year) 05/16/2006 (Street) FOLSOM, CA 95630 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/16/2006   M   14,450 A $ 18.53 126,160 D   Common Stock 05/16/2006   S   14,450 D $ 39.965 111,710 D   Common Stock 05/17/2006   M   2,655 A $ 18.53 114,365 D   Common Stock 05/17/2006   S   2,655 D $ 39.9776 111,710 D   Common Stock 05/17/2006   M   15,402 A $ 21.75 127,112 D   Common Stock 05/17/2006   M   3,200 A $ 24.93 114,910 D   Common Stock 05/17/2006   S   3,200 D $ 39.9776 111,710 D   Common Stock 05/18/2006   M   21,300 A $ 24.93 133,010 D   Common Stock 05/18/2006   D   21,300 D $ 39.9082 111,710 D   Common Stock 05/17/2006   S   15,402 D $ 39.9776 111,710 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (Right to Buy)

$ 18.53

05/16/2006

M

14,450

07/18/2003(1)

07/18/2012

Common Stock

14,450 (2)

$ 0 (3)

2,655

D

Employee Stock Option (Right to Buy)

$ 18.53

05/17/2006

M

2,655

07/18/2003(1)

07/18/2012

Common Stock

2,655 (2)

$ 0 (3)

0

D

Employee Stock Option (Right to Buy)

$ 21.75

05/17/2006

M

15,402

02/20/2004(4)

02/20/2013

Common Stock

15,402 (5)

$ 0 (3)

0

D

Employee Stock Option (Right to Buy)

$ 24.93

05/17/2006

M

3,200

02/03/2005(6)

02/03/2014

Common Stock

3,200 (7)

$ 0 (3)

49,300

D

Employee Stock Option (Right to Buy)

$ 24.93

05/18/2006

M

21,300

02/03/2005(6)

02/03/2014

Common Stock

21,300 (7)

$ 0 (3)

28,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DUPREAU EUGENE V 35 IRON POINT CIRCLE SUITE 200 FOLSOM, CA 95630	X

Signatures

Eugene Dupreau		05/18/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Option for 51,314 options, 1/3 exercisable 7/18/03, 7/18/04 and 7/18/05.
(2)	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.
(3)	The zero in table 2, item 8 is required by the EDGAR software and should be disregarded.
(4)	Option for 55,403 options 1/3 exercisable 2/20/04, 2/20/05 and 2/20/06.
(5)	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.
(6)	Option for 52,500 options 1/3 exercisable 2/3/05, 2/3/06 and 2/3/07.
(7)	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.

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