WSP04023

• File Number: 8272.600.60
• Description: Colorado River Basin Salinity Control Program - Basin Member State Info - Utah
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 7/1/1990
• Title: Upper Colorado River Basin Rangeland Salinity Control Project
• Water Supply Pro - Doc Type: Report/Study

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Name Tea.-~ .i3~P7
Date 6 -d)-I- l' c1

Subwlitershed

PSIAC - 1968

6S,4IQ -9 SEDIMENT YIELD FACTOR RATING
SURFACE GEOLOGY SOILS I CLIMATE RUNOFF TOPOGRAPHY
(.) (b) (e) (d) (e)
(10) (10) (10) (10) (20)
.. Marine thales and re- .. FI"" textured; e..i- .. Storms of seve,al .. Hieh pook nows per .. Steep upland slopes
I.ted tQudatonea .nd 1, dispersed; ..1lQ.eoo day.' duration with uait area (in excess of 3{)l'f.)
,Utatone. Olkolln.; hlCb .brink- sbort periods of In- b. Larae volum.e of flow b. High reUef; tittle or
aweU cbaractmltics teftSe raiDfall per unit area no floodplain devel-
b. SlDc1e araiD silts and b. Frequent intense COD opment
fiDe sancia vective storms
e. Freeze-thaw occu...
renee
(5) (5) (5) (5) (10)
.. Rocko of medium. s. Medium textured soU So Stonnl of moderate ..~e..te pe.k nows .. Moderate upland
hardne.. b. Occ.sional rbck fr&&.. duration and. lAteMity per unit area slopes (less than 20~.)
b. Moderatel y weathered meftts b. Wlequem convective b Moderate Yolume of b. Moderate ran or nood.
e. Moderately fractured c. Caliche layers storms flow per unit area platn development
(0) (0) (0) (0) (0)
.. M..siY., bon! Corm.. .. Hieh percent ace of .. Humid cUmate with .. Low peok flows per a. Gentle upland slopes
lions rode: ltqIDenu rainlall of low iDten.. unit area (less than S'J'o)
b. A.glfegated clays sity b. Low volume of runoff b. Extensive alluviaL
e. Hilb i.:n oraamc matter b. Precipitation in form per unit area plains
01 sno" e. Rare nlI10ff events
e. Arid cUm.t~, low in.
tensity stann.
d. ArId cUm ate; r...
conVttct1ve storms
Factorr' F //) c /;- C
value v '-' ~
GROUND COVER LAND USE UPLAND ERO$ION CHANNEL EROSION AND
SEDIMENT TRANSPORT
(I) (g) (b) (I)
(10) (10) (2S) (2S)
Ground cover does not ea- .. More than 50'!, cultivated .. More tbe SO'!. of the .. Eroding banks continu.
ceed 20'/. b. Almost all of area inten. area chancte~ed by rill ously Or at frequent in.
.. Ve&etation sparse; Uttle alvely Irued .nd gully or landslide tervals with large depths
or no Uteer e. All of ..ea recern1y era_ioll and lont [low duration
b. No rock in surface soil burned t d" b. Active headcuts and de.
/v)(,~ 6", gradation in tributary
LC((j7 10 t channels
(0) (0) (10) (10)
Cover not exceediDe 40'!. .. Le.. tban 25'1. cultivated .. About 25'1. of tbe .... a. Moderate now depths,
.. Noticeable litter b. So,'. or Ie.. recently characterized by rUl and medium now duration
b. If tree. preseGt undor- 1000pd Cully orland.lid.e erosion withoccasionaUy erodini
story not .ell developed e. Lea. tban 50'!. intenslve- b. Wind erosion _ith depo.. banks or bed
hArrah! ~X (Qr/lo'{lV(J ly graze<l silioa. in stre.. channels ~/r::.k
If~:~"(^P</ /(",-<1,[1' cL Otdiftary road and other
construction en ((1 1
..' -":l'd); r'~h~J:.,,;f
(_10) (-10) (0) (0)
.. Ares completel, protect- &. No cultivatioQ .. No appareat siena of .. Wide shallow channels
.d by vept.lion. rock b. No recent locginc erosion with n.t gradients ed
fraement., litter e. L~w 1nte~s~~2t8;:O short now duration
b. LitUe opport\llllty for b. Channels in massive
rainfall to reach erocUble Ily..:,t -- rock. large boulders, or
material well vegetated
fb,..(.j h.II~. f"~'I'M' e. Artificially controlled
Dr channels
Factor! I i:~- ~ C //1 /0
value ....... <J ~j
I Subtotol (.) - (a) 3() Subtotol (h) - (I) .,;;LD I TOTAL. S-{}- ,5-
RATING - - - - - -, - ac.ft./sq. mi./yr.

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