|
<br />~
<br />
<br />" '-"" ~
<br />
<br />~
<br />
<br />f.;i,!S'p","",," ..
<br />.-ij...",~.,I':':,;"\':""
<br />" ,
<br />"",.,,'
<br />
<br />'", ",;'l~j>, .~
<br />!,,;,_':kSti)'\J
<br />" ..-:'Ii.
<br />"""'1)';:"',;;",1> ';,<
<br />:V,,1 "
<br />'::;",:(i,'
<br />":;,',1].
<br />,(
<br />
<br />~
<br />
<br />'.
<br />
<br />
<br />COLORADO VALLEY
<br />ECOLOGISTS
<br />
<br />SEP 1 (j 2002
<br />Colorado Wi' ,
<br />6fer Con(....,f'J~,
<br />... ,v.,1I0n Boam
<br />
<br />12 September 2002
<br />
<br />Mr. Larry Lang
<br />Chief of Flood protection
<br />Colorado Water Conservation Board
<br />1313 Sherman St., Suite 721
<br />Denver, Colorado 80203
<br />
<br />AND
<br />
<br />Mr. John Liou
<br />FEMA Region 8'
<br />Denver l!'ed-eral.Center, Bldg 710
<br />PO Box 25267
<br />Denver, Colorado 80225-0267
<br />
<br />....':..1 "-'.', .. ':",',
<br />~t'e~~ing;~, ",:' ':;'..1,'; " ' ' "
<br />
<br />Itqas .~ pli;1a~pf~ ,. to ~eet ~b9th" o(}.-ou WhEin Y04macie 'your ."field .
<br />inspection. of, the: Dolot'esRi ver ').nA;ugii!!,~. 'I wish we had more' ','
<br />time to go over the floodprohlems with you then, but it' was,
<br />certainly a good start. '
<br />
<br />Because the County Commissioners and the Planning Group had a lot
<br />of questions for you, I had limited mY own comments at that time,
<br />but would, now like to expand on some of them as you plan for the
<br />remapping of the river valley. I have 3 majo~ concerns on
<br />flooding. '
<br />
<br />I am an environmental engineer with ,40 years of international
<br />experience on rivers, lakes, dams and irrigation systems. ' I
<br />conducted research on stream erosion for the USDA while at the MIT
<br />Hydrodynamiqs laboratory. " '
<br />
<br />FLOOD IMPACTS OF GRAVEL PITS
<br />
<br />Because of the geography of the Dolores River watershed, the river
<br />and its banks are very li!usceptible tio~looding. Also the wide and
<br />flat noodplainandthel!teepslopei9~ the river.makethe piver
<br />unstable. ,'1'hete i!l,geo;J..Q9'icai eyidepce .'thatth/:! :r:iVer)i!is' jumped
<br />from side to sIde .ot 'thli!' fioOdplain'in the past,andthis'c6uld
<br />happen again. The gravel pits, stockpiles and dikes might induce
<br />such'siidden shifts.
<br />
<br />Dolores R1 ver
<br />
<br />9/12/02
<br />,.
<br />
<br />page 1
<br />
<br />.
<br />
<br />P,O, Box 720 - Dolores, Colorado 81323 - U.S"of America
<br />Telephone: (970) 882-7778 - Fax: (970) 882-7779 . e-mail: snail@fone.net
<br />
|