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<br /> <br />IN REm REF~CRIR _ 740 <br />ADM - L10 <br /> <br />TO: <br /> <br />FROM: <br /> <br />SUBJ: <br /> <br />United States Department of the Interior <br /> <br />GRAND CANYON MONITORING AND RESEARCH CENTER <br />2255 N. GEMINI DR., MS-5000 <br />FLAGSTAFF, ARIZONA 86001 <br /> <br />.~ <br /> <br />MAR 0 7 2081 <br /> <br />MEMORANDUM <br /> <br />Glen Canyon Dam Adaptive Management and Technical Group <br />Representatives, GCMRC Cooperating Scientists /lJ!~ <br /> <br />Ted S. Melis, Physical Science Program Manager/(/'/f' / <br /> <br />USGS Fact Sheet #FSOI8-01 - Swnmary of Estimated Ungaged Sediment <br />Inputs to the Colorado River Ecosystem Below Glen Canyon Dam <br /> <br />,-. <br /> <br />< <br /> <br />., <br /> <br />The attached USGS Fact Sheet, Sediment Del}very by Ungaged Tributaries of the <br />Colorado River in Grand Canyon, by Webb and Griffiths, has recently been accepted by <br />the GCMRC as a final deliverable, and published by the U.S. Geological Survey. This <br />Fact Sheet fulfills the GCMRC's requirement that an executive swnmary accompany <br />each project's final reports. <br /> <br />It is the result of GCMRC-sponsored research carried out through an agreement initiated <br />with USGS in Fiscal Year 1998, and completed in FY 2000. These sediment resource <br />findings have long-term implications about the relationship between current operations of <br />Glen Canyon Dam and downstream resources. <br /> <br />!.. <br /> <br />, , <br /> <br />:;,.' <br /> <br />~ .: <br />" <br />, ' <br /> <br />This document is intended as a supplement to USGS Water Resources Investigation <br />Report #00-4055, distributed under previous cover on November 13, 2000. The Fact <br />She~t is also available electronically through the GCMRC's fip site within the <br />"REPORTS" folder of the data directory. <br /> <br />'. <br /> <br />"t'~~ <br />^' <br />~'"': <br />...,.'1' <br />x <br />..~ <br /> <br />Please review this Fact Sheet and share it with your staff aJ;i'~ Ol:her interested parties. <br />Feel free to contact me at (520) 556-7282, with'any questions you have regarding these <br />findings, or the published conclusions derived frO,m them: Dr. Webb can also be reached <br />at (520) 670-6671, ex!. 238.' . <br />" <br /> <br />'., <br /> <br />- .~. .; <br />.... ." <br />'. t.~' .. <br />