PERMFILE54710 - Laserfiche WebLink

Home Browse Search

! ~ Terrace Escarpments Terrace escarpments (Tc1 occur as breaks or seep side slopes adjacent to the channels of present or former streams. They also occur as the steep faces of terraces that border bottom lands and flood plains. This land type consists of alluvium of variable materials and is very shallow over gravel and sand. These materials have a loamy sand or sandy loam surface layer. In many areas this laver is 5 to ?0 percent gravel. Shale and sand- stone outrrops are in some areas. Included in mapping are very small areas of a Fona loamy sand, a Pona sandy loam, and a Dacono loam, all good soils for farming. The surface layer varies in reaction from place to place and is places is calcareot>s. Slopes differ widely wrthin short distances and rrnae from L to 50 percent. Some areas are used for grazin_, but the soils are too steep, too shallow, or too unstable for cultivation or wad grass management ylnrh of this ]and type is rapidly being mined for sand and gravel, and thereafter ~s not usable for farm- ing. Such areas aft used as a dumping grotmd ar are back filled with better soil material in places. yfany areas of this land type are well stited to housing or industrial developments or highway location. Prior to nee for these purposes, however. the stability of the soils should 6e determined because of slope or laclt of binder soil particles. The soils normally have good bearing capacity far foundations, low shrink-swell properties. rood natural drainage, and a low hazard of hydrolysis far buried metal pipe. Open ditches for transporting Rater are not suited because of rapid _=eepa~ . In some areas lawns and gardens would have to be built up. using better soil materials from other areas. In some areas. old ;ravel pits hart been need as dump areas. then packed and filled with rnitside soil materials. and then developed for homesires. Capability unit ti IIc- 3, nonirri~ated: Gravel BrealS gunge site: tree planting suitability ~ oup 4.