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) 03/26/2007 (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 03/26/2007   S   22,500 (4) D $ 30.34 159,928 D   Common Stock 03/26/2007   M   4,500 A $ 23.17 164,428 D   Common Stock 03/26/2007   S   4,500 (4) D $ 30.34 159,928 D   Common Stock 03/26/2007   M   3,000 A $ 22.01 162,928 D   Common Stock 03/26/2007   S   3,000 (4) D $ 30.34 159,928 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)

$ 23.17

03/26/2007

M

4,500

02/14/2007(1)

02/14/2016

Common Stock

4,500 (2)

$ 0 (3)

13,500

D

Employee Stock Option (Right to Buy)

$ 22.01

03/26/2007

M

3,000

02/23/2006(5)

02/23/2015

Common Stock

3,000 (6)

$ 0 (3)

42,000

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		03/28/2007
**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 18,000 shares, 1/4 exercisable 2/14/07, 2/14/08, 2/14/09 and 2/14/10
(2)	The option was originally reported as an option for 12,000 shares at an exercise price of $34.76 per share, but was adjusted to reflect WCI's 3-for-2 stock split in the form of 50% stock dividend, effective March 13, 2007. Accordingly, on March 13, 2007, the option became exercisable for 18,000 shares at an exercise price of $23.17 per share.
(3)	The zero in table 2, item 8 is required by the EDGAR software and should be disregarded.
(4)	Sold pursuant to a 10b5-1 plan
(5)	Option for 63,000 shares, 1/3 exercisable 2/23/06, 2/23/07 and 2/23/08.
(6)	The option was originally reported as an option for 42,000 shares at an exercise price of $33.01 per share, but was adjusted to reflect WCI's two 3-for-2 stock splits in the form of 50% stock dividends, effective June 24, 2004 and March 13, 2007. Accordingly, on March 13, 2007, the option became exercisable for 63,000 shares at an exercise price of $22.02 per share.

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