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<br />This association makes up about 4 percent of the
<br />Area. IL is about 65 percent Juget soils and about
<br />15 percent Rock land. Westcreek and Garber soils
<br />and a moderately deep soil with • clay and clay
<br />loam subsoil make up the remaining 20 percent.
<br />Juget soils are in the mountainous part of the
<br />Area. They are steep, very gravelly sandy loans and
<br />loony sands that are shallow over granite bedrock.
<br />
<br />Rock outcrop is made up of barren cliffs of
<br />granite.
<br />Mater erosion is a moderate to severe hazard in
<br />this association. Soil slippage is common. Gullies
<br />form easily.
<br />This association is no[ suited to cultivation,
<br />It is used for grazing livestock, rildlife habitat,
<br />recreation, Qrristmas trees, and lumber for fence
<br />poles.
<br />DESCRIDTIONS OF THE SOILS
<br />This section describes the soil series and map-
<br />ping units in the Castle Rock Area. Each soil se-
<br />ries is described in considerahle detail, and then,
<br />briefly, each mapping unit in that series. Unless
<br />it is specifically mentioned otherwise, it is to be
<br />assumed that what is stated about the soil series
<br />holds true for the mapping units in that series.
<br />Thus, to get full information about any one mapping
<br />unit, it is necessary to read Loth the description
<br />of the mapping unit and the description of the soil
<br />series to which it belongs.
<br />An important par[ of the description of each soil
<br />series is the soil profile, that is, the sequence of
<br />la}'e rs from the surface downward to rock or other
<br />underlying material. Each series contains two de-
<br />scriptions of this profile. The First is brief and
<br />in cams familiar to the lay~n an. The second, de-
<br />tailed and in technical to ms, is for scientists,
<br />engineers, and others who need to make thorough and
<br />precise studies of soils. Unless it is othen+ise
<br />stated, the colors given in the descriptions are
<br />t}~osc of a dry soil.
<br />As mrntion ed Sn the section '41ow This Survey Was
<br />Ala de", not all mapping units are of a soil series.
<br />F.ock land, for example, does not belong to a soil
<br />series, but nevertheless, is listed in alphabetic
<br />order along with the soil series.
<br />Following the name of each mapping unit is a
<br />sy--.6o1 in parentheses. This symbol identifies the
<br />capping unit on the detailed soil map. Listed at
<br />the end of each description of a mapping unit is the
<br />capability unit and range site in which the napping
<br />unrc has been placed. The page for the description
<br />cf each capability unit and range site can be found
<br />Ly rc fa•w ing to the "Guide to Ala piling Uni [s" at the
<br />L,.ck of this survey.
<br />the ac rcage and proportionate extent cf each
<br />rapptng unit arc shown in table 1. hla ny of the to rrs
<br />u•. ed in describing soils can be found in the Glos-
<br />s~r! at the end of this survey, :urd Wore do tailed
<br />infs cation about the terminology' and ce [hods of
<br />ti%rl cap; ing can be obtained from the Soi] Su n~cy
<br />~... .~.al (S) 1/.
<br />~Iln Jcrsco red n~c.iSc r< ~n pa rcnth r~. r. tr fcr to
<br />L~;e r~turc Citc•d, p. 1_'1.
<br />EXHIBIT "U" - Wildlife, Water
<br />Resources, Vegetation and Soil Information
<br />Page 4
<br />Blakeland Series
<br />The Blakeland series consists of well-drained
<br />soils that formed in sand deposited by wi~td and
<br />water on uplands and alluvial fans. These soils are
<br />mostly on the east side of major drainageways in the
<br />northern part of the Arca. Slopes are 1 to 15
<br />percent, The vegetation is mainly tall grasses.
<br />Elevations are 5,500 to 6,600 feet. Annual precip-
<br />itattor. is 15 to 19 inches. Mean annual soil tem-
<br />perature is 41° to 80° F., and the frost-free sea-
<br />son is 120 to 115 days.
<br />In a representative profile, the surface layer
<br />is dark grayish-brown light sandy loam about 13
<br />inches thick. The next layer is brown loamy coarse
<br />sand about 11 inches thick. The unde r: yi ng material
<br />is stratified light yellowish-brown coarse loamy
<br />sand to sand. In places, hard arkosic shale is be-
<br />low a depth of 40 inches.
<br />Blakeland soils have rapid permeability. Avail-
<br />able water capacity is low. Roots can penetrate to
<br />a depth of 40 inches or more.
<br />lbst areas of Blakeland soils are in native
<br />grasses and are used for grazing cattle and horses.
<br />Some areas are irrigated, and others are dryfarmed,
<br />although the soils are droughty. These soils are
<br />suited to urban development.
<br />Representative profile of Blakeland sandy loam,
<br />in native pasture half a mile south and 300 feet east
<br />of the northwest corner of sec, 7, T. 8 S., R. 65
<br />N.:
<br />All--O to 6 inches, dark grayish-brown (IOYR 4/2)
<br />light sandy loam, very dark brown (lOYR 2/2)
<br />when moist; weak, fine, granular structure;
<br />sligh by hard, very friable; pFI 6.8; clear,
<br />smooth boundary.
<br />A12--G to 1} inch cs, dark grayish-brown (lOYR 4/2)
<br />Itp.ht sandy loam, very dark grayish brown (]OYR
<br />3I2) whc r. moist; weak, ncdium [o [oar5e, 5ub-
<br />angular blocky structure; hard, very friable;
<br />pfl 6.A; clear, tiavy hounda ry'.
<br />AC~ 1-'. to '_1 inch c•., hymen (LOYP S!3) loamy cw rse
<br />sacJ, ~ta r: gray ash brn.n (IOY'P. •t/?) when
<br />r^oisc; r-~c ak, cue r~,c, pris-'tic structure
<br />pa~tin{ to r.~~l, co., r.c, suban4ular blocky;
<br />vc ry hnS, a-r± 1rlaLlc, pal 6.8; gradual,
<br />sroo[b !~rv.n d.i r..
<br />C--23 to r,o innc~s, lip,ht ycllrn:r~h-b roan (2.SY 6/3)
<br />st ra a fled ccers~• loo-y sand to sand, light
<br />5
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