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

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

IV-I8
4'/Jr;elf 5 4/44'IStWatershed L1 T
jJl75
1~;r5 I? )-3E

State

. c:. Udll /. '6
/lr./0N~ t.j~51'()/1/ Condition
Name I?A:iEi-9
,

.Cr 5 (. ()
~ ().

Subwatersbed

Date ~ -~7-;7o

PSIAC

1968

-

Acres

t:.5',

:L

/Jlt/- SEDIMENT YIELD FACTOR RATING
SURFACE GEOLOGY SOILS CLIMATE RUNOFF TOPOGRAPHY
(.) (b) (e) (d) (e)
(10) (10) (10) (10) (20)
.. M.rine shales .nd r. .. Fine textured: easi- .. Storms of several a. RiCb peak nows per a. Steep upland slopes
l.ted m.udatoftea .ad 1y dispersed: s.Une- day.' duration with unit area (in e1:cess oC 300!'.)
siltstones alkalinej hicb shrink- sbort periods of In. b. Larae volume of flow b. Rich reUer; little or
awell characteristics tease tainfa11 per unit area no floodplain deve!-
b. S1nc1e crain sUt. and b. Frequent intense COD opmeat
fine sands vectiv~ .torms
e. Freeze.-thaw occur- ~
rence
(5) (5) (5) f (5) (10)
.. Rocks of medium s. Medium. text\lred soU .. Storms of mode~6: ~ ~od.el'8te peak nowa .. Moderate upland
hardne.. b. Occ.sional !'bek frac- duntion and iIltensi per unit area slopes (less than 20~o)
b. Moderately weathered ments b. Infrequent convective b. Moderate volume of b. Moderate ran or flood-
e. Moderately rractured c. Calicbe layers storms now per unit area plain. development
(0) (0) (0) (0) (0)
a. Massive, bard forma- .. Hilh peteeatBge of a. Humid cUmate with .. Low peak flows per .. Gen.tle upland slopes
tioa.s rock ftapeat. rainfaU of low iaten- unit area (lesa than 5'".)
b. Aggrellated clays sity b. Low volume of runoff b. Extensive alluvial
;;!J~5A~ e. Hi;h in oflan.ic matter b. Precipitation in form per unit area plains
of SDOw e. Rare nIDalf evea.t.
e. Arid elimate, low in- 157f.;
ten.sity storms ~
d. Arid cUmate; rare Y
coovective stormS
Factort I S- /0 S- ') 7
value
GROUND COVER LAND USE UPLAND EROSION CHANNEL EROSION AND
SEDIMENT TRANSPORT
(0 (Il (h) (i)
(10) CIa) (25) (2S)
Grouad cover does not ex. .: More than 50'1. cultivated a. More than 5ll'1'. of the .. Eroding bank. continu-
ceed 20'!. & Almost all of area w'o- area characterized by rill ously or at frf:quent in-
a. VegetaUon sp...e; little sively grazed and IUlly or laDdslide tervals with large depths
or no titter e. All of ar.. recently erosion 0;nd lonl flow duration
b. No rock in .urface soil burned 60~ b. Active headcuts and de-
gradation in tributary
~a~,~. 7r 6
'_' >if" rt 5'"
(0) (0) (10) 4c:ri fIG a" ~ (~
Cover not exceedia.c <40'1. .. Lees than 25% cultivated L About 25;' of the area a. Moderate ~ d pths.
.. Noticeable Utter b. 5ll'1', or less recently cbaracterized by rill and medium now duration
b. If trees preaea.t under. 10lpd cully orlandslide erosion withoccasionaUy eroding
story not well developed. e. Leas thaa 5O'!t intensive- b. Wind erosion with depo- banks or bed
ly crazed sitioa. in stream channel.
I sio d. Ordinary road ad other
construction
(-10) (-10) (0) (0)
.. Area completely protect- .. No cultivatioa. L No appareal siens of .. Wide shallow ehannels
ed by veptatioa., rock ~ No recent logcinc erosion with nat gradients and
fraements, litter Low inteasity crazing short flow duration
b. Little opportWlity lor b. Channels in massive
rainfall to re.eh erodible rock, large boulders. or
material well vegetated
e. ArtUiciaUy controlled
channels
Factor I 10 0 ;;z5 ~()
value
I Subtoial (a) - ClI) Ij).; Subtotal (h)-(i) J-t 5 I :~~~NLG.J1. = cl- LQ ac.tt./SQ. mi.lyr.

"",
,...,
tv
00
-;E

~

(Instructions on '.fI.rse)

t,; T1~
/30F !?

SHEET

l.