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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Watershed 14 r State

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Name ffA-l'flf - is 44f
Date ,~~ 7- .?O

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Silbwatershed

Acres

PSIAC - 1968

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(,5 ;YU.I. I~-((-().. SEDIMENT YIELD FACTOR RATING 0 W
SURFACE GEOLOGY SOILS CLIMATE RUNOFF TOPOGRAPHY
(a) (b) (c) (eI) (eJ
(10) (10) (10) (10) (20)
a. Marine sbale. and,... a. Fine texturedj .ui. s. Storma of several a. HiCb. peak nows per .. Steep upland slopes
lated mudstone. and 1, 41aperaecl; .aUce- day.' d.uraUon. with uAit area (in excess of 30'1.)
sUutoMa alkaline; hi&b shrink- . abort periods of in. b. Lara:e volume of fiow b. Hlih teUef; little or
awell cbaracteristics ~ terule rabU"! per Wlit area no floodplain devel..
b. Sine!e crain .Uts .~ ~ Freq~nt ia.tenae COD 1 opmeat
fine suda \veetive .torma
c. Freeze--thaw occur-
....ce
(S) (5) , (5) , (5) (10)
a. Rocko of medium .0 Medium textured soil .. Stomus of moderate a. Moderate peak 110" .. Moderate upland
hardne.. b. Oce.alooa! rbet ftal'" v-. ration aod intenaity per unit area slopes (less than 20~.)
b. Moderatel, weathered meuts b. requent convective b. Moderate volume of b. Moderate fan or flood-
c. Moderatel, fractured c. Caliche layers storm, Ilow p.r unit area plain development
/ltrJ
(0) (0) (0) (0) (0)
a. M..siv~. bard forma- a. Hiah percentage of a. Hwniel climate with .. Low peak nows per .. Gentle upland slopes
Uono rock trapeats rainfau of low inttm- unit area (less than 5"7.)
b. Accregated etays sity b. Low volume oC runoff b. Extensive alluvial
(r1ANU) S f c. H1chin orvanic matter b. Preci~itation in form per unit area plains .
of snC)w c. Rare runolC events
<;J.GI ''^'a-''r c. Arid climate, low in.
tensity storms
el. Ariel climate; rore
convec:tlve stormS
Factor 1- 3 ~ Q '? ~o
value
GROUND COVER LAND USE UPLAND EROSION CHANNEL EROSION AND
SEDIMENT TRANSPORT
(0 (e> (h) (i)
(10) (10) (25) (25)
Ground cover does not ... a. More than Sor. cu1tiv.ed .. More than SO'!. of the .. Eroding bank. continu-
ceed 20'1. b. Almost all of area mten- area characterized by rUI ousty or at frequent in-
a. Veaetatloft sparse; Illtle aively grazed and CUlly or laDds lide tervals with large depths
or no Utter c. All of oreo recently erosioD _ ~~~1:onll: flow duration
b. No rock in .urbce soU burned ~ 've headeuts and de-
gradation in tributary
channels
(0) (0) (10) (10)
Co".r not esceed.iD&: 40'!. .. Le.s than 25~ cultivated .. About 25.,. of the area .. Moderate Ilow depths,
.. Noticeable Utter b. SO'!. or leas recently characterized by rill and medium Ilow duratioft
b. U trees preseat under- 10lced CU1.1Y orlandslide erosion with occasionally erodillc
story Dot well developed c. Lea. than 50'!0 intenslve- b. Wlnd erosion with depo. baDks or bed
~ 1y Kl'azed sitiOD in streMll. cbanDels
. Ordinary road ad other J.O~
Y.. 10 d',.<O /.At If) ConstnaeUOD
(-10) (-10) (0) (0)
a. Area completety protect- a. No cultivation .. N.. apparent ai&nS of .. Wide shallow channels
eel by vecetation, rock b. No recent loCPDI erosioD with nat gradients aod
(raamenta, litter c. Low inteftsity pazint G)~hort now duration
b. LitUe opportllDity for Channels in massive
raWall to reach erodible )070 'tu~ rock, large boulders, or
material ti1r,/...-a.. vegetated
c. Artificially controlled
channels
Factor ~r tJ -6 r S-
value
I Subtotal (a) - <11:) 39 Subtot.l (b) - (I) Jj I :~~~NL.o1""A, =~.f." -~3.c.ft./.q. mi.lyr.

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