UNITED STATES  
SECURITIES AND EXCHANGE COMMISSION  
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934  
(Amendment No. 5)*
Pure Cycle Corporation
(Name of Issuer)

Common Stock, Par Value 1/3 of $.01
(Title of Class of Securities)

746228 30 3
(CUSIP Number)

Thomas P. Clark, 
8451 Delaware Street, Thornton, CO 80260 (303) 
292-3456
(Name, Address and Telephone Number of Person 
Authorized to Receive Notices and Communications)

April 29, 2005
(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G 
to report the acquisition that is the subject of this Schedule 13D, 
and is filing this schedule because of sections 240.13d-1(e), 
240.13d-1(f) or 240.13d-1(g), check the following box. [ ] 
Note: Schedules filed in paper format shall include a signed original 
and five copies of the schedule, including all exhibits. See 
section 240.13d-7 for other parties to whom copies are to be sent. 

* The remainder of this cover page shall be filled out for a reporting 
person's initial filing on this form with respect to the subject class 
of securities, and for any subsequent amendment containing information 
which would alter disclosures provided in a prior cover page. 
The information required on the remainder of this cover page shall not 
be deemed to be "filed" for the purpose of Section 18 of the 
Securities Exchange Act of 1934 ("Act") or otherwise subject to the 
liabilities of that section of the Act but shall be subject to all 
other provisions of the Act (however, see the Notes).



CUSIP No. 736228 30 3

1.	Name of Reporting Person. I.R.S. Identification Nos. of 
	above persons (entities only).

	Thomas P. Clark

2.	Check the Appropriate Box if a Member of a Group (See 
	Instructions)
	(a)  
	(b)  X

3.	SEC Use Only 

4.	Source of Funds (See Instructions) 
	NA

5.	Check if Disclosure of Legal Proceedings Is Required 
	Pursuant to Items 2(d) or 2(e)
	NA

6.	Citizenship or Place of Organization
	United States of America

Number of Shares Beneficially Owned by Each Reporting Person 
With:

7.	Sole Voting Power:			2,269,205				
8.	Shared Voting Power:			None					 
9.	Sole Dispositive Power:			2,269,205				
10.	Shared Dispositive Power:		None	

11.	Aggregate Amount Beneficially Owned by Each Reporting 
	Person:    2,269,205

12.	Check if the Aggregate Amount in Row (11) Excludes Certain 
	Shares (See Instructions) ...........

13.	Percent of Class Represented by Amount in Row (11):    
	16.6%

14.	Type of Reporting Person (See Instructions):  IN



CUSIP No. 736228 30 3

1.	Names of Reporting Persons. I.R.S. Identification Nos. of 
	above persons (entities only).
     
	Ryan T. Clark 

2.	Check the Appropriate Box if a Member of a Group (See 
	Instructions)
	(a)  
	(b)  X

3.	SEC Use Only 

4.	Source of Funds (See Instructions) 
	NA

6.	Check if Disclosure of Legal Proceedings Is Required 
	Pursuant to Items 2(d) or 2(e)
	NA

7.	Citizenship or Place of Organization
	United States of America

Number of Shares Beneficially Owned by Each Reporting Person 
With:

7.	Sole Voting Power:			2,049,705				
8.	Shared Voting Power:			None					 
9.	Sole Dispositive Power:			2,049,705				
10.	Shared Dispositive Power:		None	

11.	Aggregate Amount Beneficially Owned by Each Reporting 
	Person:    2,049,705

12.	Check if the Aggregate Amount in Row (11) Excludes Certain 
	Shares (See Instructions) ...........

13.	Percent of Class Represented by Amount in Row (11):    
	15.0%

14.	Type of Reporting Person (See Instructions):  IN



CUSIP No. 736228 30 3

1.	Names of Reporting Persons. I.R.S. Identification Nos. of 
	above persons (entities only).

	TPC Ventures, LLC
	IRS Identification - 20-2757519 

2.	Check the Appropriate Box if a Member of a Group (See 
	Instructions)
	(a)  
	(b)  X

3.	SEC Use Only 

4.	Source of Funds (See Instructions) 
	NA

7.	Check if Disclosure of Legal Proceedings Is Required
	Pursuant to Items 2(d) or 2(e)
	NA

8.	Citizenship or Place of Organization
	United States of America

Number of Shares Beneficially Owned by Each Reporting Person 
With:

7.	Sole Voting Power:			2,049,705				
8.	Shared Voting Power:			None					 
9.	Sole Dispositive Power:			2,049,705				
10.	Shared Dispositive Power:		None	

11.	Aggregate Amount Beneficially Owned by Each Reporting 
	Person:    2,049,705

12.	Check if the Aggregate Amount in Row (11) Excludes Certain 
	Shares (See Instructions) ...........

13.	Percent of Class Represented by Amount in Row (11):    
	15.0%

14.	Type of Reporting Person (See Instructions):  CO



CUSIP No. 736228 30 3

1.	Names of Reporting Persons. I.R.S. Identification Nos. of 
	above persons (entities only).

	Thomas P. Clark Annuity Trust u/a/d April 29, 2005 

2.	Check the Appropriate Box if a Member of a Group (See 
	Instructions)
	(a)  
	(b)  X

3.	SEC Use Only 

4.	Source of Funds (See Instructions) 
	NA

8.	Check if Disclosure of Legal Proceedings Is Required 
	Pursuant to Items 2(d) or 2(e)
	NA

9.	Citizenship or Place of Organization
	United States of America

Number of Shares Beneficially Owned by Each Reporting Person 
With:

7.	Sole Voting Power:			2,049,705				
8.	Shared Voting Power:			None					 
9.	Sole Dispositive Power:			2,049,705				
10.	Shared Dispositive Power:		None	

11.	Aggregate Amount Beneficially Owned by Each Reporting 
	Person:    2,049,705

12.	Check if the Aggregate Amount in Row (11) Excludes Certain 
	Shares (See Instructions) ...........

13.	Percent of Class Represented by Amount in Row (11):
	15.0%

14.	Type of Reporting Person (See Instructions):  OO


Item 1.	Security and Issuer

This Schedule 13D/A is filed with respect to shares of Common 
Stock, par value 1/3 of $.01 ("Common Stock"), of Pure Cycle 
Corporation, a Delaware Corporation (the "Company"). The 
Company's principal executive offices are located at 8451 
Delaware Street, Thornton, CO 80260.


Item 2.	Identity and Background

(a)	This Schedule 13D/A is being filed by Thomas P. Clark 
("T Clark"), TPC Ventures, LLC, a Colorado limited liability 
company (the "LLC"), Ryan T. Clark ("R Clark") and Thomas 
P. Clark Annuity Trust u/a/d April 29, 2005 (the "Trust") 
(collectively T Clark, the LLC, R Clark and the Trust are 
referred to as the "Reporting Persons").  

(b)	The business address for the Reporting Persons is the 
address for the Company's executive offices as listed 
above.

(c)	T Clark is retired but was formerly the CEO of the Company 
and remains an employee of the Company. R Clark is self-
employed.  

(d) (e)During the last five years neither have any of the 
Reporting Persons been convicted in any criminal 
proceedings (excluding traffic violations or similar 
misdemeanors) nor have any of the Reporting Persons been a 
party to any civil proceedings of a judicial or 
administrative body of competent jurisdiction and as a 
result of such proceeding was or is subject to a judgment, 
decree or final order enjoining future violations of, or 
prohibiting or mandating activities subject to, federal or 
state securities laws or finding any violation with respect 
to such laws.

(f)  T Clark and R Clark are citizens of the United States of 
     America.


Item 3.	Source and Amount of Funds or Other Consideration

Not applicable


Item 4.	Purpose of Transaction

The transactions described below were all done for estate 
planning purposes for T Clark.  

On April 29, 2005, Clark transferred 2,049,705 shares of common 
stock to the LLC as an initial capital contribution, resulting 
in T Clark owning 100% of the membership units in the LLC.  

On April 29, 2005, Clark transferred 99.9% of his ownership 
interest in the LLC to the Trust as consideration for an annuity 
contract payable from the Trust to T Clark.  Following this 
transfer, T Clark owns .1% of the LLC but retains his position 
as manager of the LLC.  As manager of the LLC, T Clark has sole 
voting power of the 2,049,705 shares of common stock owned by 
the LLC and dispositive power over part or all of such shares to 
the extent that such disposition does not constitute a sale of 
all or substantially all of the assets of the LLC.  

Except as described below, the Reporting Persons have no present 
plans or proposals that relate to or would result in any 
transaction of the kind described in paragraphs (a) through (j) 
of Item 4. In the future, however, the Reporting Persons reserve 
the right to adopt such plans or proposals, subject to 
applicable regulatory requirements, if any.

Pursuant to an Amended and Restated Voting Agreement dated 
August 12, 1992, a copy of which was filed previously as Exhibit 
A to Amendment No. 1 (the "1992 Voting Agreement") the Reporting 
Persons have agreed, along with other parties, to vote the 
shares of the Company's common stock in favor of electing a 
representative designated by The Environmental Private Equity 
Fund II, L.P., a Delaware limited partnership ("EP Fund"), to 
the Company's Board of Directors. EP Fund owns 478,351 shares of 
common stock of the Company or 3.5% of the total outstanding 
common stock. Companies affiliated with EP Fund who are parties 
to the 1992 Voting Agreement (the "EP Fund Entities") own an 
additional 1,632,652 shares of common stock or 11.9% of the 
total outstanding common stock. George W. Middlemas currently 
serves on the Board and was elected as the EP Fund 
representative.


Item 5.	Interest in Securities of the Issuer

(a)	As of April 29, 2005, T Clark is the direct beneficial 
owner of 219,500 shares of common stock, or 1.6% of the 
outstanding common stock of the Company.  T Clark is also 
the indirect beneficial owner of 2,049,705 shares of common 
stock, or 15.0% of the outstanding common stock of the 
Company, which are directly owned by the LLC, for which T 
Clark is the manager.  After the consummation of these 
transactions, T Clark's total beneficial ownership (direct 
and indirect) remains unchanged at 2,269,205 shares of 
common stock, or 16.6% of the outstanding common stock of 
the Company.

The Trust, and therefore R Clark as sole trustee of the 
Trust, may be deemed to have indirect beneficial ownership 
of 2,049,705 shares (15.0% of the total outstanding common 
stock) owned by the LLC because (1) the Trust is the 
majority owner of the LLC and, as a result, R Clark as the 
trustee of the Trust has the right to replace T Clark as 
the manager of the LLC and (2) a disposition of all or 
substantially all of the assets of the LLC requires an 
affirmative vote of the members holding more than 50% of 
the units of the LLC, which would require an affirmative 
vote of the Trust.

(b)	Although the Reporting Persons are a party to a voting 
agreement, more specifically described in Item 4, the 
Reporting Persons disclaim beneficial ownership of all 
shares of common stock owned by the other parties to that 
agreement and disclaims the existence of a "group" within 
the meaning of Section 13(d)(3) of the Securities Exchange 
Act of 1934.

The Reporting Persons have the power to dispose of 
2,049,705 shares of common stock, and T Clark has the power 
to dispose of an additional 219,500 shares of common stock, 
subject to the 1992 Voting Agreement, which requires the 
Reporting Persons to obtain consent for disposition unless 
the transferee agrees to be bound by the 1992 Voting 
Agreement or the disposition is pursuant to an agreement in 
effect on August 12, 1992. The transferees of the shares 
described in Item 4 above are subject to the terms of the 
1992 Voting Agreement.  Subject to the terms of the 1992 
Voting Agreement, T Clark, acting in his capacity as 
Manager of LLC, has the sole power to vote 2,049,705 shares 
of common stock, and the sole power to vote another 219,500 
shares of common stock.  In addition, the Trust, as the 
majority owner of the LLC and R Clark as the trustee, have 
the right to replace T Clark as the manager of the LLC, and 
therefore, indirectly have the sole power to vote the 
shares of common stock of the LLC.

(c)	See Item 4 above for a description of the transaction 
effected by the Reporting Persons in the past sixty (60) 
days.

(d)	None

(e)	None


Item 6.	Contracts, Arrangements, Understandings or 
Relationships with Respect to Securities of the Issuer

See Item 4 above for a description of the 1992 Voting Agreement.


Item 7.	Material to Be Filed as Exhibits

None




Signatures

After reasonable inquiry and to the best of my knowledge and 
belief, I certify that the information set forth in this 
statement is true, complete and correct. 

May 13, 2005											
Date

/s/  Thomas P. Clark
by:  Mark W. Harding as Attorney-in-Fact					
Signature

/s/  TPC Ventures, LLC
by:  Mark W. Harding as Attorney-in-Fact for Thomas P. Clark	
Signature

/s/  Ryan T. Clark										
Signature

/s/  Thomas P. Clark Annuity Trust u/a/d April 29, 2005
by:  Ryan T. Clark, Trustee								
Signature