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r, ,. _. .. _~ . ~ r e 't ,.~ 'y.l.~;. .I 'tiy' .S -_ .. _ . .i _,._ ~VUt-s ~.. _ ~, -,~ -~.: ;~ _ ; .: TABLe Z-Engineering inferprelafiorts ~An asterisk in the first column indicates that at least one mapping unit is made up of two or m e kinds of soil. The soi{s instructions in the first Suitability as a source o(- - Li nation [or- Soil series and ~ map symbols Topsoil Sand Grovel Road fill Septic to k Homesites with filter fiat basements Dunul: D~.__.. ..___ Punr: cobbles Cuutl___. _ Good___-__.___ Good -.____-__ Slight__._- __-- Slight--________ and gravel. 'Norte: tao, Nr___.___ Fair. gravclly_. Poor above 2'_ Poor above2~ Good_ -___.. Moderateo Moderate: For Dunul part of fret: excess feet excess severe: frost action; Nr, sec Dunul lines. fines. water tab a water table series. Gourl nr fair Good or fair at a dept a[ a depth below a depth below a depth of 3 to 5 f [. of 0 [0 5 feet. a('P , feet. of 2!~ teat: excess fines. in such mapping units may have di Rercn[ properties and limitations, and for this reason it is necessary to follow the column of this table care(uRyl Soil features nllecting- Farm ponds li ighway location Dikes and _____ _ Agricultural Irrigation diversions drainage I{csennrr nrca Embankments Gcod etaLillty nearly Ievcl. 1Vater table at a depth o(3 [0 5 feet: frost actimt; good stability. Shnlluu' (n gravel and cnlih ten; very rapid pcrmc:o- bilily m gravel and cobbles. Grsvel and sand at a depth of '2 to 3!•_ feel: moder- ately rapid Vt'r- meabilit)' above gavel; water table at a depth of 3 l0 5 feet. high permeability; shallow to gravel and cobbles. Sand and gravel at a depth of 2 to 3!~ feet; (air to good compaction characteristics; medium to low permeability when compacted. TABLE 8.-Engineering test data Not. needed: gravel and cobbles at x depth of ;~r to j; foot. Water table at a depth of 3 to 5 feet; gravel end sand n[ a depth of 2 to 3! ~ feet; nearly level. Nests performed by Soil Mechanics Laboratory, Soil Conservation Service, Portland, Oreg. Dashes indicate that no }ravel and cobbles at a depth o! 3i foot to I;j teat; low available water capacity; cobbly surface. Gravelly s:mdy loam: gravel end sand at a depth o(2 to 3!5 feet; low or moderate available u'atcr capacity. was made density Laboratory Soil name and location Parent material sam le Depth bf imam dry Optimum nom er d natty moisture T- Norte gravcll}' sandy loam: 1;?40 feet north and .180 feet west of southeast Grarclly alluvium. 700125 0-9 11R 13 corner sec. 5, 'f. a0 N., R. 8 E. 700126 11-15 120 13 I i 700127 22 .... ... .... ........'__ hf cchanical analysis ' ~ Gravel and robblCs xt a tlcplh of ! , II Ln as foul; very. rapid pcrmua- bili[y in gravelly material. Moderately rapid permeability; gravel and sand at a depth of 2 to 3!: feet; slopA is 0 to 1 percent. Percentage passing sieve- Percentage smaller then- Liq- Plas- uid ticity i I I limit index No. 4 No, ]O~No. 40~No. 200 0.05 0.02 0.005 0.00^ 3 in. 2 in. I!! in. 1 in. ?e' in. % in. (4.7 (2.0 IO.a2 10.074 mm mm mm mm I mm) mm1 mm) I mm) ____ _ _ ]00 ~ 9G I Oi 87 86 81 55 , 24 21 15 10 8 25 6 100 98 9G 40 86 82 53 21 18 12 8 6 ....-. NP .___....--~ 100 f 54 I 91 78 70 61 I 20 6 6 5 5 ___.. ____.. NP ' Mechanical analysis according to AASIi TO Drsignalion: T 88-57 (1 ). Results by this procedure may differ obtained by the sail survey procedure of [he Soil Conserea Una Service (SCS). In the AASH'I'O procedure, the fine mat hydrometer method and the various grain-size fractions are r:dculated on [he basis o! all the material, including [hat co: _ in _diameter. In the SCS soil survey proredu re, the fine material is analyzed bY' the pipette method.and the material Coa in diamecer is ex8uded from calculations of grain-size fractions. The mechanical analysis data used in this table ate textural classes for soils. Nonplastic. ___ __ _ .__ _ Classification Unified i ?-4 (0) SC-SM 2-4 (0) SM 1-6(0) SP-SM evv'hat from results I is analyzed by the than ^ millimeters than ?millimeters suitable for naming