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<br />I <br />I' <br />I <br />I <br />I <br />'., <br />I <br />I <br />I <br />I <br />.' <br /> <br />0\ <br /> <br />OLSSON ASSOCIATES <br />ENGINEERS. PLANNERS. SCIENTISTS" SURVEYORS <br /> <br />February 1 0, 2006 <br /> <br />Mr. Ben Urbonas, P.E. <br />Chief, Masterplanning Program <br />Urban Drainage and Flood Control District <br />2480 W. 26th Avenue, Suite 156B <br />Denver, CO 80211 <br /> <br />Re: Massey Draw and SJCD (South) Major Drainageway Planning Update <br />Agreement No. 03-08.06 <br />OA Project No. 2003-1321 <br /> <br />Dear Ben: <br /> <br />Transmitted herewith is the Conceptual Design Report for the Massey Draw and SJCD (South) <br />major drainageway planning update. The report documents the masterplanning process from <br />project initiation through preparation of the conceptual design report. Included in the report is <br />a description of the study watershed, a synopsis of the hydrologic and hydraulic analysis, <br />identification of the problem areas, and conceptual design of the plan selected by the project <br />sponsors. <br /> <br /> <br />The problems along the drainageways generally consist of channel erosion, and inadequate <br />channel and culvert capacity. The selected plan includes $9,677,850 for channel stabilization, <br />$1,673,000 for channel improvements, $1,735,500 for culvert improvements and $754,000 for <br />regional detention. Including easement acquisition, and allowances for contingencies, <br />engineering services, construction inspection and legal/administrative services the total <br />estimated cost of the improvements is $27,346,000, <br /> <br />Thank you to the staff from Urban Drainage and Flood Control District, Jefferson County and <br />the City of Littleton for their contributions to project. <br /> <br /> <br />t(a/JY7 <br />Z-'/(), pu <br /> <br />Sincerely, <br /> <br />t)P.J~fB ~ <br /> <br />-I <br />" <br />I <br />\ <br /> <br />Bruce J. Buttner, P.E. <br />Water Resources Team Leader <br /> <br />David P. Krickbaum, P.E. <br />Project Manager <br /> <br />Encl. <br /> <br />143 Union Boulev.;lfd, Suile 700.. lokewood, Color.1do 80228-182$ .. (720) 962.6072 .. FAX (720) 962-6195 <br />ARIZONA.. COLORADO.. KANSAS.. MINNESOTA" MISSOURI.. NEBRASKA <br />www.oaconsulllng.com <br />