<br />retard flow and raise w::lter surface olevatlons upstrean. HIgh cliff
<br />ty~e b,mks that line much of the stream arc rough ond varyIng In
<br />cross soction t~at generate turbulence in the water and slows Its
<br />prognlS5.
<br />
<br />The north tributary to Cottorwood Crook hils no bridges
<br />or man made obstructions to Impede flow, but the south tributary h(ls
<br />4 culverts thatobstrllCt flow. Table 2 isa listing of all bridges
<br />oreulverts that cross Cottonwood Creek and its tributaries.
<br />
<br /> ~
<br /> "
<br /> e
<br /> "
<br /> B
<br /> ~
<br /> "
<br /> 0
<br /> ,
<br /> ~
<br /> "
<br /> "
<br /> <
<br /> 5
<br /> m
<br /> "
<br /> e
<br /> 0
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<br />W 0
<br />" 8
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<br /> 0
<br /> u
<br /> p
<br /> z
<br /> <
<br /> ~
<br /> ."
<br /> 8
<br /> "
<br /> 0
<br />
<br />Other Factors AffecTin"l Floodin"l
<br />TwO small reservoIrs are loeated In the upstre1lm roaches
<br />of Q:lttonwood Creek. These reservoirs are beneflcl111 in increasing
<br />I nflltratlon rates and reducing pe",k runoff froo floods of small
<br />ITklgnltude. Large floods are relatively unaffected by ttle small
<br />storage eapacl tv, and because of I nildequate earthen d3m!; ~nd spIll H
<br />ways, they could Impose greater hazard on properties downstream.
<br />
<br />Flood Dilmaqe PrevenTI on I~""sures
<br />Several flood damage prevention me<lsureS hl,lve been taken,
<br />by local Interest, tor the reach of Cottonwood Creek from Academy
<br />Boulevard ei:lsTw-,rd for ~pproximately or\€ mi I". A sheet pile retaTn-
<br />ing wall h::ls been oonstruc"tea across the creek above Academy 8oulo-
<br />vard to prevent erosIve degrdd~tlon of the stream. Also along the
<br />northernsldaofthestreom,leeveesof local sand and gravel mote-
<br />rial h~ve boen con~Tructcd TO protect a~Jecent reslduntlai ~r~~~.
<br />
<br />Theleveefrommlle 1.70 to mile 2.08 has been partly stabilized
<br />with sparse gra5ses, but the levee frommJle 2.27 to mIle 2.46 has
<br />bee.~ recently constructed and has no stabi I I zin,) material to pro-
<br />tect it from erOSion.
<br />Both the need for und means of preservl ng f loodway Idnd~
<br />ani! recel vl ng cons; der1ltion 1 n tile coordi nated land ~se pl::lnni ng
<br />that presently Involves the Pikes Poak Area Oouncll of Governments
<br />{PPACOG) ~nd its portlclpatlng local government entities in EI Paso
<br />Ccwn+y. Ovo,"" II "'g1on~ I pol i ties, p I~nnl ng g0di s, dnd proposed Im-
<br />plementation (i ncl udl n9 reg" I"tlcn by local laws to mai nr~1 n dral r.ago
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