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<br />, I <br /> <br />. <br /> <br />STATE CJJ COLORADO <br /> <br />- <br /> <br />Colorado Water Conservation Board <br />Department of Natural Resources <br />721 Centennial Building <br />131 3 Sherman Street <br />Denver, Colorado 80203 <br />Phone: (303) 866.3441 <br />FAX: (03) 866,4474 <br /> <br />MEMORANDUM <br /> <br />Roy Romer <br />Covernor <br /> <br />James $. Lochhead <br />Executive Director, DNR <br /> <br />Dc'lries C. Lile, RE. <br />Director, eWeB <br /> <br />. <br /> <br />(Updated March 12, 1998) <br /> <br />TO: Colorado Water Conservation Board Members <br /> <br />FROM: John Van Sciver <br /> <br />DATE: March 3, 1998 <br /> <br />SUBJECT: Agenda Item 13b. March 10-11, 1998, Board Meeting-- <br />Boulder and Left Hand Irrigation Company <br /> <br />Approval of a Small Project Construction Fund Loan in amount of $50,000 to <br />reconstruct the Twin Lakes inlet and outlet structures and to rehabilitate drop <br />structures on the ditch system. <br /> <br />BACKGROUND <br /> <br />The Boulder and Left Hand Irrigation Company (located in Boulder County) has applied for a <br />Small Project Loan to undertake rehabilitation of portions of their system, They wish to borrow' <br />75 % of the cost to complete Phase I rehabilitation work, estimated at $62,500, Staff is <br />recommending a loan in maximum amount of $50,000, in the event contractor bids exceed the' <br />estimate, The CWCB loan would stilI be limited to 75 % of actual final project costs, <br /> <br />This ditch system is located north of Boulder Creek, about 1 mile north east of Boulder (see <br />attached map,) The system has been in operation since 1873 although the Company formally <br />incorporated in 1921. Many of the concrete structures are original to the ditch system, Twin <br />Lakes Dam was built later, in 1948, Recent inspections of the outlet indicate that the pipe has <br />rusted through, and must be replaced, The reservoir (Twin Lakes is made up of Davis Dams #1 <br />and #2) has a 10tal capacity of 218 acre-feet and is rated as a class 2 dam, since failure would <br />cause significant property damage if the dam were to fail. <br /> <br />Mike Ballantine P ,E, of Rocky Mountain Consultants (RMC) has completed reconnaissance level <br />engineering design work, has reviewed the feasibility of several design alternatives, and has <br />developed a cost estimate for the project. RMC has been hired by the Company to complete the <br />feasibility study and engineering design work for the project. <br />