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<br /> <br />BC~LE <br /> <br />f\ECE\\JEO <br /> <br />C"' \. tJ 'l.\\\\~ <br />o l'I\\\iOl\ soalO <br />~dO 'Natet crJIse <br /> <br />215 Union Blvd., Suite 500 <br />Lakewood, CO 80228 <br />TEL: (303)987-3443 <br />FAX: (303)987-3908 <br />www.boyleengineering.com <br /> <br />Mark Haynes, P .E. <br />COLORADO DIVISION OF WATER RESOURCES <br />1313 Sherman Street, Room 818 <br />Denver, CO 80203 <br /> <br />October 13,2003 <br />DN-GJO-l05-03 <br /> <br />Bovd Lake Dam (Dam ID# 040105) - Spillway Location <br /> <br />Dear MarIe <br /> <br />Greeley and Loveland Irrigation Company (GLIC) is proposing to construct a new spillway <br />along the Boyd Lake south embankment as shown on the attached figure. On behalf of GLIC, <br />Boyle Engineering Corporation (Boyle) is requesting the State Engineer's Office to rule that the <br />proposed location of the spillway, returns the flow into the basin where the dam is located based <br />on Rule 5.A. (7)(e)(D of the Colorado Rules and Regulations for Dam Safety and Dam <br />Construction dated September 30, 1988. <br /> <br />Attached is a copy of a 1908 USGS topography map for the proj ect area. The map indicates that <br />two lakes, referred to as the Boyd Lakes, existed prior to the construction of Boyd Lake Dam. <br />The map refers to one of the lakes as North Basin and the other as the South Basin. Defined <br />outlets from the lakes are not evident based on the review of the 1908 and present day maps and <br />field review. <br /> <br />The existing spillway for the present day Boyd Lake consisted of a natural cut located just north <br />of the GLIC pump station located along the southeast embankment as shown on the attached <br />figure. The existing spillway has been filled in over the years and is no longer usable. The SEO <br />dam inspection reports indicate that this area is the location of the spillway. <br /> <br />The proposed spillway would generally consist of principal and emergency overflow sections. <br />The primary section would be sized for the 100-year flood while the emergency section would be <br />sized for the difference between the 1 DO-year flood and the 75% of the PMP flood. <br /> <br />GLIC is in the process of obtaining funding from the Colorado Water Conservation Board <br />(CWCB) for the construction of the project. Boyle would greatly appreciate your quick review <br />of this situation to enable the GLIC to submit their funding application for the November CWCB <br />board meeting. <br /> <br />BOYLE ENGINEERING CORPORATION <br /> <br />I'i\ ~"'"',...lAti D",ncr <br />