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1
<br />�., ... .nw. r.u�lvu u/1u Z""11 V1uw111g itru inutlerate
<br />hazards. Included in mapping are a few small areas of
<br />I'latner loam that commonly are in small deprmional
<br />areas.
<br />Most areas of this soil are cultivated, but a few
<br />areas remain in native grass. Capability unit IVe -3,
<br />nonirrigated; Loamy Plains range site; tree planting
<br />suitability group 1.
<br />Stoneham loam, 3 to 9 percent slopes (SO. —This soil
<br />has the profile described as representative for the series.
<br />It is on uplands near major stream channels in scattered
<br />areas throughout the county. The areas are uniform in
<br />shape and range from 50 to 80 acres in size. Runoff is
<br />generally medium but is rapid if the soil is unprotected.
<br />Terrace Escarpments
<br />Terrace escarpments (Tel occur as breaks or steep
<br />side slopes adjacent to the channels of present or former
<br />streams. Then also occur as the steep faces of terraces
<br />that, border bottom lands and flood plains.
<br />This land type consists of alluvium of variable materials
<br />and is very shallow over gravel and sand. These materials
<br />have a loamy sand or sandy loam surface layer. In many
<br />areas this layer is to 20 percent gravel. Shale and sand-
<br />stone outcrops are in some areas. Included in mapping are
<br />verb• small areas of a Vona loarny sand, a Vona sandy loam,
<br />and a Dacono loam, all good soils for farming.
<br />1
<br />I
<br />ADAMS COLNTY, OOLORADO
<br />The surface layer varies in reaction from place to
<br />place and in places is calcareous. Slopes differ widely
<br />within short distances and range from 1 to 80 percent.
<br />Some areas are used for grazing, but the soils are too
<br />steep, too shallow, or too unstable for cultivation or
<br />good grass management.
<br />Much of this land type is rapidly being mined for
<br />sand and gravel, and thereafter is not usable for farm-
<br />ing. Such areas are used as a dumping ground or are
<br />back filled with better soil material in places. Many
<br />areas of this land type are well suited to housing or
<br />industrial developments or highway location. Prior to
<br />use for these purposes, however, the stability of the soils
<br />should be determined because of slope or lack of binder
<br />soil particles. The soils normally have good bearing
<br />capacity for foundations, low shrink -swell properties,
<br />good natural drainage, and a low hazard of Hydrolysis
<br />for buried metal pipe. Open ditches for transporting
<br />water are not suited because of rapid seepage.
<br />In some areas lawns and gardens would have to be
<br />built up, using better soil materials from other areas.
<br />In some areas, old gravel pits have been used as dump
<br />areas, then packed and filled with outside soil materials,
<br />and then developed for homesites. Capability unit VIIe-
<br />3, nonirrigated ; Gravel Breaks range site; tree planting
<br />suitability group.4.
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<br />Wca -11 to lh inches, pale brown (10YR 6/3) sandy loam,
<br />brown (10YR 5/3) when moist; very weak, medium,
<br />subangular blocky structure; band, friable; very
<br />thin patchy clay films on peds; calcareous and con-
<br />tains lime In faint splotches; moderately alkaline;
<br />gradual, smooth bonndary.
<br />Clca -18 to 23 inches, very pale brown (10YR 7/3) fine sandy
<br />loam, brown (10TR 5/3) when molst; massive;
<br />slightly hard, friable; calcareous and contains lime
<br />In streaks; moderately alkaline; gradual, smooth
<br />boundary.
<br />Ma -23 to 39 inches, light yellowlsb -brown (2.5Y 6/4)
<br />loamy fine sand, light olive brown (2.5Y 5/4) when
<br />moist: massive; hand, friable: calcareous and con-
<br />tains lime In common, medium, prominent mottl";
<br />moderately alkaline; clear, wary boundary.
<br />R-39 Inches, soft but Inhibiting fine- grained sandstone, light
<br />gray OOYR 7 /1) ; nonealcareons, except mildly cal•
<br />careous In spots; moderately alkaline.
<br />The A borlwn ranges from 2 to 6 Inches In thickness, from
<br />grayish brown to pale brown in color, and from loamy fine
<br />sand to fine sandy loam In texture. The )3 horizon ranges
<br />from 6 to 24 Inches in thieknes . Depth to calcareous material
<br />ranges from 0 to 20 inches. Depth to bedrock ranges from
<br />20 to 40 inches.
<br />Terry fine sandy loam, 0 to 3 percent slopes (Te8).-
<br />This nearly level to very gently sloping soil is in irregu-
<br />larly shaped areas that range from 20 to 60 acres in size.
<br />This soil has a profile that is similar to the profile de-
<br />scribed as representative for the series, but it has a
<br />thicker surface laser and subsoil. Surface runoff is slow,
<br />
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