|
<br />~
<br />
<br />" "
<br />" 0
<br />, 0
<br />" "
<br />u
<br />,
<br />" >
<br />8 is
<br />
<br />o
<br />" "
<br />,
<br />o ,
<br />~
<br />o "
<br /><
<br />~ ~
<br />"
<br />o
<br />"
<br />o
<br /><
<br />
<br />I gl! ~
<br />0-51 ill
<br />eo _
<br />"
<br />00.
<br />" 0
<br />'Il_O
<br />w rr
<br />0"
<br />'- +-0<'>
<br />'" ".Do:.>
<br />" -
<br />o
<br />
<br />0'
<br />W "
<br />- ,
<br />W"
<br />
<br />>
<br />"
<br />o
<br />o
<br />o
<br />~
<br />"
<br /><
<br />o
<br /><
<br />-
<br />
<br />" ~
<br />we
<br />"OU'"
<br />'" ill ",,_
<br />".-,8",<:>
<br />'" 0- '- '"
<br />+-'-"-w
<br />~"
<br />,
<br />,
<br />0-
<br />._,
<br />O"E'
<br />",0 "'...
<br />"'-0<1>'"
<br />'- 0>- '- II)
<br />0<1>"-(..)
<br />'0
<br />o
<br />
<br />" ;~
<br />OU
<br />0-'
<br />"0
<br />
<br />,
<br />o
<br />"',,>+-
<br />'-"''''ill
<br />+-c:l_al
<br />'n w ~
<br />
<br />"
<br />,
<br />"
<br />o
<br />>
<br />"
<br />o
<br />o
<br />
<br />"
<br />o
<br />,
<br />o
<br />o
<br />
<br />-
<br />
<br />-
<br />o
<br />,
<br />"
<br />
<br />00<
<br />. 0"
<br />- 0 _
<br />'-.DO
<br />:>:<="
<br />
<br />GRANGE 1-l~LL G'~EEK'
<br />Grouo 4
<br />
<br />N
<br />o 0
<br />"
<br />^ 0
<br />" "
<br />
<br />Strea~ and ~sin Characteristics
<br />Grange ~II CreeK, a left-Dank tr;b~tary at the Soufn
<br />Platte River, 15 the farthest down~tr@<lm of tn" stre",,"s stud i!!~ in
<br />this volume. The main stem rises in the western 5~tion ot North-
<br />glenn and flowscast'l/ard about 5.5miles to join th8 South Platte
<br />RIver jus't north of East I04th Avenue. A major tributary, desig-
<br />natoe South Fork, rlsos in western Thornton and joins the m~in stem
<br />do,; 05 tream I rom I me Dr i vO . Thoso streams. "I th the ot~'er tr i bu-
<br />taries, dr~1 n about 9 squ~re miles ot roll i ng uplands and level
<br />South Platte River tlood plain. From the headwaters to the junction
<br />'with South Fork, the va Ileys are narro~' ~r>d steep sided with bed
<br />slopes averllg I ng 60 feet per mile, I r> the middle re~ch, the va Iley
<br />wlder>s ~r>d the grad lent relduces to ,.,n ~verage of ';0 teet per ml Ie.
<br />~s the stream loavos t~e uplands arId enters the wide South PI~tte
<br />River flood pl<llr>s, the v~lley becor:ws hdefln3ble an~ the gradient
<br />orops to an over~ge of 30 teet to tM mile. l-I6re, a Iso, The stream
<br />,,~ters 11 prepa r",d c ha Ane I for COrlveyence acro,;s t~, '" t I ood 0 I 11 in.
<br />On Grange he I I Creek, 11~e other ur>develooed streams In
<br />the area, no t lood r"cords drl> ~v,,'lilb Ie. &;t ~rbdr>i lation hbS or>I';
<br />entered the b"~ I" In the la~t ton ye~rs, line, I n the future is
<br />expec,ted to nlove furtner downstream. Her" thu flood pia I n Is bro.~d"r
<br />~r>d dovolop",cr>ts 'II I I be more susccptib Ie to darllilgro fror', ov<,rbiJnk
<br />flows. TI\B upper portIon of the main stroam, located ',n the sootoern
<br />_~orti1g lonn j"velopmunt dl strict, is c los" to 1'1\", h"adwaters ilnd ~"s
<br />~(),"e I nC i ullntil I t 100<1 prorect i or. f r",~ an ~pstrcam reservoi r. Th i 5
<br />crea dues notdppoartoh<Jvellserloos flood problw.and will not Ub
<br />
<br /><
<br />o
<br /><
<br />o
<br />w
<br />m
<br />~
<br />,
<br /><
<br />"
<br />~
<br />,
<br />"
<br /><
<br />m
<br />
<br />m m
<br />, ,
<br />"
<br />^ ^
<br />'0 "
<br />
<br />o m
<br />N '"
<br /><
<br />^ ^
<br />^ ^
<br />
<br />~, ~,
<br />. 0
<br />- -
<br />m 0
<br />. 0
<br />> > 0
<br />< <
<br /> "
<br />< < 0
<br />. e
<br />" 0
<br />, m 0
<br /> >
<br />, . 0
<br />0 ^
<br />. 0 e
<br />, , 0
<br /> 0
<br /> "
<br /> "
<br /> "
<br />" " 0
<br />^ ,
<br /> ,
<br />0 m -,
<br /> "
<br />
<br />Ji~"uss~d in tr.;,; rcp"r~. :JOCJU~O of the W;oj",r Ilo0~ ~I.';~ M,I
<br />
<br />greater chance ot bel rig f I code<! from hIgh-I r>tensl ry r,li r>t~ II rU10ft,
<br />tne u"~eVe lo~ed va Ileys <!m/nstr<<oO' ~nd east of the Northg lenn ~rell
<br />and along the Sooth Fork trlcutary in tho exoi!~d i ng Thornton d,>velopment
<br />
<br />"
<br />
|