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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5/Jr;iE~5 tU1.5H
1)@ r Ci (/I..5
lOIVE.< jtOl'E5

Acres

Watershed
~I? Subwatershed

//E5/,4r
~5Et.Y
r- 9' -- 9d
CJ

1 V-b
(j r State

Name

PSIAC - 1968

Date

G'517l <{ g SEDIMENT YIELD FACTOR RATING

RUNOFF
(d)

NO

SURF ACE GEOLOGY
(a)

(10)
.0 Marine sh.l.s and
tated mudstones a
N sUtatone.
N (. ^
.....:ISO 7J ~ v_~
()( 561 sJ."r (tlA,

SOILS
(b)

CLIMATE
(e)

U VI r !1
Conaition

TOPOGRAPHY
(e)

(10)
HiCh peak Rows per ..
uDit are.
Lat'le volume of no b.
per unit area

(20)

Steep upland slopes
(in excess of 3(010)
High relief; little or
no floodplain deve!.
opm6l1t

(10)

(10)
Fine textured; easl- ..
I, diapersed; ..Un"
alkaline, hi&h sh!!J>k-
awell characteristics
Sinele traiD ailts and b.
flne sanda

Storms of several a
day.' duration wi
short periods of in- b
tense rlliAfall
Frequebt intense con
vective storms
c~Freeze..tbaw occur-
rence

/,h,,,uO~

(5) (5) (5) (5) (10)
a. Rock. of mediuaa .0 MediulD textured soU Storm. of moderate a. Moderate peak nows a. Moderate upland
hardne.. b. Occa.ional rbck fraa.. duratiOn and intensity per unit area slopu (less than 20cro)
b. Moderately weathered menta ~frequent convective b. Moderate volume of b. Moderate fan or flood-
c. Moderately fractured c. Caliche layers storms now per unit area plain development

(0)
a. Massive, hard forma.
tionl
N, /IIi/n,.vli:

/liAt/co5
(INf!l(( ~d/)J.r."fJ)

(0) (0) (0) (0)
a. Hieh perc:entage of .. Humid climate with a. Low peak flows per a. GenUe upland slopes
rock fragments rainfaU of tow inten- unit area (less than 5"70)
b. -'elfegated clays sity b_ Low volume of runoff b. Extensive alluvial
e. Highin oflamc matter b. Precipitation in form per unit area plains
of sno.., e. Rare runolf events
e. Arid cUmate, low in-
tensity storms
d. Arid climate; r..e
convecalve storms

Factor
value

,-
..;)

GROUND COVER

(f)

Ground cover does not ex-
ceed 2Q1f.
a. Vegetation spllrse; little
or no litter
b. No rock in surface soU

Cover not exceedi.na: 40'/.
e. Noticeable litter
b. If trees present under-
story not well developed

/tJ! JrlC>

(-10)
.. Area completely protect-
ed by veletatioa, rock
fragment., litter
b. Little opportunlty for
rainfalt to reach erodible
material

Factor
value

Subtotal (a) - (c)

(Instructions on ,~ve's~)

lu

LAND USE

(g)

(10)

(10)

c: More than 50% cultivated
b)A1mOSt an of area intett_
-- - sively grazed
c. All of area tecenUy
burned

(0)

(0)

a. Less than 25,.. cultivatl!d
b. 50'!. or less recently
logled
c. Less than 50"l, intensive-
ly grazed
d. Ordinary road and other
construction

(-10)

e. No cultivation
b. No recent loggio.&
c. Low intensity grazing

Subtotal (h) - (i)

TOTAL /II _ . (; '}
RATING - - - - ~-. - ac.ft./sq. mi./yr.

17.) i/e..,

OF l!I-

7

/0

UPLAND EROSION

(h)

(2S)

a. More than S()l'f, of the
area characterized by rill
and gully or landslide
erosion

(10)

.. About 25'1, of the area
characterized by rill and
gully or landslide erosion
b. Wiftd erosioQ with depo.
sittoa ill stream channels

(0)
a. NO' apparent signs of
erosioQ

<'-J /.----
,-L/:..J
/15

SItEET

/?-

CHANNEL EROSION AND
SEDIMENT TRANSPORT
(i)

(25)

a. Eroding banks continu-
ously or at frequent in-
terv als with large depths
.-""\ and long flow duration
(b. )ctive headcuts and de4
"______- gradation' in tributary
channels ~:.,"~, #'>
"'-;', /T

(10)

a. Moderate flow depths,
medium flow duration
wIth occasionally eroding
banks or bed

(0)

a. Wide shallow channels
with nat gradients and
short flow duration
b. Channels in massive
rock, large boulders, or
well vegetated
c. ArtifIcially controlled
channels

:6
~

b