AGREEMENT TO AMEND OPTION AGREEMENT FOR EXPORT WATER SERVICE FOR THE SKY RANCH PUD Dated: January 30. 2004 ---------------- RE: Option Agreement dated October 31. 2003 by and between Airpark ------------------ Metropolitan District ("AMD"); Icon Investors I LLC ("DEVELOPER"); Pure Cycle Corporation ("PURECYCLE"); and Rangeview Metropolitan District ("RANGEVIEW") relating to the provision of water services to the Sky Ranch PUD (Arapahoe County case No. Z01-010). This Amendment, dated January 30, 2004, shall amend the aforesaid Option Agreement for Export Water Service follows: Section 2.03 of the above referenced Option Agreement is hereby amended to read as follows, with changes being highlighted in BOLD TYPE: "203 Extension of Option. In the event that the DEVELOPER has not exercised ------------------- the Option in accordance with Section 2.01, the DEVELOPER may extend the Option for up to an additional three one-year terms by making payments DIRECTLY TO THE DAVIS GRAHAM & STUBBS LLP TRUST ACCOUNT of One Hundred Thousand Dollars ($100,000) (the Option Extension Fee) for each additional one-year extension term. Payments shall be due on the fifth Anniversary for a one year extension, on the fifth and sixth Anniversaries for a two year extension, and on the fifth, sixth and seventh Anniversaries for a three year extension. ANY SUCH PAYMENTS FOR EXTENDING THE OPTION SHALL BE USED TO RELEASE OUTSTANDING SECURITY INTERESTS ON THE DEDICATED EXPORT WATER." AIRPARK METROPOLITAN DISTRICT By: /s/ Andrew R. Klein ---------------------------------- Andrew R. Klein, President ICON INVESTORS I, LLC, A Colorado Limited Liability Company By: Airway Park Manager LLC, a Colorado Limited Liability Company By: /s/ Andrew R. Klein ---------------------------------- Andrew R. Klein, its Manager PURE CYCLE CORPORATION, a Delaware Corporation By: /s/ Mark Harding ---------------------------------- Mark Harding, President RANGEVIEW METROPOLITAN DISTRICT By: /s/ Thomas P. Clark ---------------------------------- Thomas P. Clark, Director