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<br />Table 2. Computed lOO-Year Dischare:es for Approximate Streams in Unincoroorated La Plata County
<br />
<br /> ,
<br />I I I Drainage I IOO-Year I
<br />I Flooding Source I Location I I I Discharge Computation Method
<br /> Area Discharge
<br /> (so mil (cis)
<br /> Los Pinos River DIS of Red Cr. 284' 5,0002 HEC-l Modeling (USACE, 1999)3
<br /> DIS of Texas Cr. 3021 7,8002 HEC-l Modeling (USACE, 1999)
<br /> D/S of Bear Cr. I 3281 10,2002 HEC-l Modeling (USACE, 1999)
<br /> @ Bayfield 3401 11 ,5002 HEC-l Modeling (USACE, 1999)
<br /> Red Creek @ Confl. wi Los Pinos R. 10.2 1,935 CWCB Regional Regression4
<br /> N. Fork. Texas Creek @ Confl. wi S. Fork Texas Cr. 3.5 1,119 CWCB Regional Regression
<br /> p~ 'T'__ ro_ T (Q)ro .. , , .". ,.. I , .~ ,.. , I
<br />
<br />S. . vrk. . ~^as ,-"eeK I
<br />Texas Creek
<br />Bear Creek
<br />Wallace Gulch I
<br />Florida River
<br />
<br />"" ,-,onn. wi N. ForK 1 exas ,",r.
<br />@ Confl. wi Los Pinos R.
<br />
<br />5.5
<br />9.0
<br />
<br />@ Confl. 'v'll Los Pinos R.
<br />
<br /> """
<br /> ~v.v
<br /> '7"
<br /> ,.V
<br />I 97.4
<br />i
<br />I
<br />I 9.2
<br />I
<br />I 11.7
<br />i
<br />,
<br />i
<br />j
<br />, '::::11f'1
<br />I V'7/
<br />I
<br />I
<br />,
<br />
<br />@ Confl. wi Los Pinos R.
<br />@ USGS Gage No. 0963000
<br />
<br />I
<br />i
<br />I
<br />Unnamed Tributary I @ Confl. wi Florida R.
<br />T'\..... r"_._._l." I ,., ..., ___: .,......,~ __~""'T":I 1"rv,"!
<br />LilY L.lttl\.. I L.. / IIH Llf;:) 01 LK .JVL,
<br />I fn/C 1:~:.. ~~ ~___~_. -Cl__..J_;,,:_ ~____,.___\
<br />! \J...Jf>J 1111111,. Vi ajJjJJVA. lIUUUlJHl1111l1iljJjJ~llb)
<br />I @1 East i\",r:i~ns Rd.
<br />
<br />I (DiS jimit of approx. mapping)
<br />
<br />I
<br />,
<br />I
<br />i
<br />I . _ ___
<br />i An!mas H.1Y~~
<br />,
<br />I
<br />
<br />I
<br />
<br />1,41U
<br />1,815
<br />
<br />I L WCB RegIOnal RegreSSIOn
<br />CWCB Regional Regression
<br />I CWCB Regional Regression
<br />CWCB Re ional Re ression
<br />900 cfs Lemon Dam discharge +
<br />, CWCB Regional Regression6
<br />
<br />I ~~~~ ~egiona: ~egression
<br />I LVI Ltl KeglOnal KegresslOn
<br />i
<br />i"'!::'T(, 'T'_1...~."., 17 T"I,<->+,,':1e..J 1.........l__1___.
<br />I ~'hJ .taUl\:; 1. - U(.;lclJJ U IlYUiUIU}::.Y
<br />, . --
<br />! for Animas R. @ Durango
<br />I Northern Corporate Limits
<br />
<br />2,731
<br />
<br />1,596
<br />4,170
<br />
<br />1,835
<br />
<br />L,Ufb
<br />
<br />....,...., c:n0
<br />~J:."JVV
<br />
<br />Notes:
<br />1. Drainage areas include 270 sq mi basin upstream of Vallecito Reservoir.
<br />2. Discharge rates downstream of Vallecito include 3,1 00 cfs baseflow discharge from reservoir.
<br />3. Flood Plain Delineation Study, Los Pinos River Below Vallecito Dam to the Southern Ute Indian Reservation Boundmy, La Plata County, Colorado, U.S.
<br />Army Corps of Engineers, Albuquerque District, 1999.
<br />4. Guidelines For Determining IOO-Year Flood Flows For Approxirnate Floodplains in Colorado, Version 4.0, Colorado Water Conservation Board, January
<br />1999.
<br />
<br />5. Drainage area includes 69 sq mi basin upstream of Lemon Reservoir.
<br />6. CWCB regional regression equation applied to 28.4 sq mi drainage area below dam and 900 efs dam discharge then added to computed peak tlow.
<br />7. Fload Insurance Study, L.1 Plata County, Colorado, Unincorporated Areas, Federal Emergency !vfanagemerlt Agency, lviarch 16, 1995.
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<br />9
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