Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
MITTELSTAEDT RONALD J
   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
__X__ Officer (give title below) _____ Other (specify below)
Chief Executive Officer
(Last)
(First)
(Middle)
35 IRON POINT CIRCLE, SUITE 200		 3. Date of Earliest Transaction (Month/Day/Year)
04/30/2007
(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 04/30/2007   M   3,106 A $ 12.35 433,246 D  
Common Stock 04/30/2007   S   3,106 D $ 31.7639 430,140 D  
Common Stock 05/01/2007   M   86,300 A $ 12.35 516,440 D  
Common Stock 05/01/2007   S   86,300 D $ 30.9456 430,140 D  
Common Stock 05/01/2007   M   24,281 A $ 12.35 454,421 D  
Common Stock 05/01/2007   S   24,281 D $ 30.9456 430,140 D  
Common Stock 05/01/2007   M   107,975 A $ 14.5 538,115 D  
Common Stock 05/01/2007   S   107,975 D $ 30.9456 430,140 D  
Common Stock 05/02/2007   M   53,880 A $ 14.5 484,020 D  
Common Stock 05/02/2007   S   53,880 D $ 31.0424 430,140 D  
Common Stock 05/02/2007   M   6,897 A $ 14.5 437,037 D  
Common Stock 05/02/2007   S   6,897 D $ 31.0424 430,140 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) $ 12.35 04/30/2007   M     3,106 (1) 10/27/2005 07/18/2012 Common Stock 3,106 (1) $ 0 (2) 86,300 D  
Employee Stock Option (Right to Buy) $ 12.35 05/01/2007   M     86,300 (1) 10/27/2005 07/18/2012 Common Stock 86,300 (1) $ 0 (2) 0 D  
Employee Stock Option (Right to Buy) $ 12.35 05/01/2007   M     24,281 (3) 10/27/2005 07/18/2012 Common Stock 24,281 (3) $ 0 (2) 0 D  
Employee Stock Option (Right to Buy) $ 14.5 05/01/2007   M     107,975 (4) 10/27/2005 02/20/2013 Common Stock 107,975 (4) $ 0 (2) 53,880 D  
Employee Stock Option (Right to Buy) $ 14.5 05/02/2007   M     53,880 (4) 10/27/2005 02/20/2013 Common Stock 53,880 (4) $ 0 (2) 0 D  
Employee Stock Option (Right to Buy) $ 14.5 05/02/2007   M     6,897 (5) 10/27/2005 02/20/2013 Common Stock 6,897 (5) $ 0 (2) 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MITTELSTAEDT RONALD J
35 IRON POINT CIRCLE
SUITE 200
FOLSOM, CA 95630		   X     Chief Executive Officer  

Signatures

 Ronald Mittelstaedt   05/02/2007
**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) This option was originally reported as an option for 119,209 shares of common stock at an exercise price of $27.79 per share, but was adjusted to reflect WCI's 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 number of shares purchasable on exercise of the option and its exercise price, as originally reported, were adjusted to 268,221 shares and $12.35 per share, respectively.
(2) The zero in Table II, Column 8 is a placeholder only that is required by the EDGAR software and should be disregarded.
(3) This option was originally reported as an option for 10,791 shares of common stock at an exercise price of $27.79 per share, but was adjusted to reflect WCI's 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 number of shares purchasable on exercise of the option and its exercise price, as originally reported, were adjusted to 24,281 shares and $12.35 per share, respectively.
(4) This option was originally reported as an option for 111,935 shares of common stock at an exercise price of $32.62 per share, but was adjusted to reflect WCI's 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 number of shares purchasable on exercise of the option and its exercise price, as originally reported, were adjusted to 251,855 shares and $14.50 per share, respectively.
(5) This option was originally reported as an option for 3,065 shares of common stock at an exercise price of $32.62 per share, but was adjusted to reflect WCI's 3-for2 stock splits in the form of 50% stock dividends effective June 24, 2004 and March 13, 2007. Accordingly, on March 13, 2007, the number of shares purchasable on exercise of the option and its exercise price, as originally reported, were adjusted to 6,897 shares and $14.50 per share, respectively.

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