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WILLAPA BASIN
was derived from the Private Forest Land
Grading Program (PFLG) and subsequent soil
surveys. State and private lands, which had the
potential of supporting commercial forest
stands, were surveyed by PFLG. Some tribal and
Federal lands were also surveyed. Because this
was a cooperative soil survey project,
agricultural and non-commercial forestlands
were also included within some survey areas.Entity and Attribute Overview:
SOILS24.35: relational table containing soil
attributes generally taken from soil surveys.
SOIL.NM.MDFR.CD
Code
0 = no soil name modifier, 100 = acid
substratum phase, 105 = alderwood material,
110 = alkaline variant, 115 = andesite
substratum, 120 = avalanche chute, 125 = basalt
substratum, 130 = basin, 135 = bedrock
substratum, 140 = bedrock substratum cold, 145
= bouldery, 150 = breccia substratum, 155 =
breccia substratum cold, 160 = breccia
substratum exposed, 165 = calcareous
substratum, 170 = cemented substratum, 175 =
channeled, 180 = channery substratum, 185 =
coarse variant, 190 = cobbly, 195 = cold, 200 =
compact substratum, 205 = convex slopes, 210 =
cool phase, 215 = cool very steep, 220 = deep,
225 = dissected, 230 = drained, 235 =
dredgings, 240 = east slopes, 245 = eroded, 250
= everett material, 255 = exposed, 260 =
extremely bouldery, 265 = extremely steep, 270
= fill areas, 275 = fragmental, 280 = fragmented
substratum, 285 = frigid, 290 = glacial drift
substratum, 295 = gneiss substratum, 300 =
gneiss substratum exposed, 305 = granite, 310 =
gravel, 315 = gravelly substratum, 320 =
hardpan variant, 325 = heavy variant, 330 =
high precipitation, 335 = lacustrine substratum,
340 = lacustrine substratum eroded, 345 =
leached surface, 350 = level, 355 = limestone
substratum, 360 = loamy, 365 = loamy
substratum, 370 = low precipitation, 375 = low
precipitation north slopes, 380 = low
precipitation south slopes, 385 = moderately
deep over gravel eroded, 390 = moderately deep
over sand eroded, 395 = moderately deep, 400 =
moderately deep eroded, 405 = moderately
shallow, 410 = moderately shallow drained, 415
= moderately shallow eroded, 420 = moderately
well drained, 425 = mounded, 430 = muck, 435
= nearly level, 440 = neutral subsoil, 445 =
nonflooded, 450 = north slopes, 455 = overflow,
460 = overwashed, 465 = ponded, 470 =
protected, 475 = pumiceous, 480 = quarry, 485
= red, 490 = rolling, 495 = saline alkali, 500 =
saline alkali eroded, 505 = sand, 510 =
sandstone substratum, 515 = sandy, 520 = sandy
substratum, 525 = sandy substratum north
slopes, 530 = seeped, 535 = severely eroded, 540
= shallow, 545 = shallow eroded, 550 = shaly
substratum, 555 = siltstone substratum, 560 =
sloping, 565 = slumped, 570 = south aspect, 575
= spoils, 580 = steep, 585 = stony, 590 =
subirrigated, 595 = thick surface variant, 600 =
thin solum, 605 = tidal, 610 = till substratum,
615 = tuff substratum, 620 = undulating to hilly,
625 = variant, 630 = very cold, 635 = very deep,
640 = very steep, 645 = very steep north slopes,
650 = very steep south slopes, 655 = volcanic
ash variant, 660 = volcanic ash variant eroded,
665 = warm, 670 = warm south slopes, 675 =
wet, 680 = wet subsoil variant.
SOILS24.35
TXTR.MDFR.CD.CODE: topsoil texture;
coarse, frag or other modifier.
Code Description:
0 = none, 1 = gravelly, 2 = very gravelly, 3 =
extremely gravelly, 4 = cobbly, 5 = very cobbly,
6 = extremely cobbly, 7 = stony, 8 = very stony,
9 = extremely stony, 10 = cindery, 11 = very
cindery, 12 = extremely cindery, 13 = rocky, 14
= very rocky, 15 = shotty, 16 = very shotty, 17 =
shaly, 18 = bouldery, 19 = very bouldery, 20 =
mucky, 89 = other, 99 = variable.
SOILS24.35
FINE.FRACT.CD.CODE: top soil texture, fine
fraction material.
Code Description:
0 = no data, 1 = muck, 2 = peat, 10 = clay, 11 =
silty clay, 12 = sandy clay, 13 = silty clay loam,
14 = clay loam, 15 = sandy clay loam, 16 = silt,
17 = silt loam, 18 = loam, 19 = very fine sandy
loam, 20 = fine sandy loam, 21 = sandy loam,
22 = coarse sandy loam, 23 = loamy fine sand,
24 = loamy sand, 25 = loamy coarse sand, 26 =
sand, 89 = other, 99 = variable.
SOILS24.35
M-SOIL.MAJ.SPEC.CODE: first major
commercial potential tree.
Code Description:
AF = Subalpine fir, DF = Douglas fir, GF =
Grand fir, GP = gravel pit, LP = Lodgepole
pine, MFP = Marginal forest productivity, NA =
not applicable, NC = non-commercial, ND = no
data, PP = Ponderosa pine, RA = Red alder,
WAT = water, WH = Western Hemlock, WL =
Western Larch, WP = Western White pine.
SOILS24.35
PRNT.MAT.SPF.CD.CODE: specific
characteristics of parent material.
Code Description:
0 = no data, 1 = variable, 5 = beach deposits, 10
= bedrock, 11 = basic igneous bedrock
(basalt/andesite/gabbro/dunite), 12 = acidic
igneous bedrock (granite/rhyolite/granodiorite),
13 = breccia and/or tuff, 14 = non-carboniferous
sedimentary bedrock
(sandstone/siltstone/graywacke), 15 =
carboniferous sedimentary bedrock
(limestone/dolomite), 16 = hard shaley bedrock
(shale/slate/phyllite/argillite), 17 =
carboniferous shaley bedrock (e.g. calcareous
shales), 18 = crystalline metamorphic bedrock
(e.g. gneiss/schist), 19 = high magnesium
bedrock (e.g. serpentine), 20 = glacial drift
covering material described in code 10,
21 = glacial drift covering material described in
code 11,
22 = glacial drift covering material described in
code 12,
23 = glacial drift covering material described in
code 13,
24 = glacial drift covering material described in
code 14,
25 = glacial drift covering material described in
code 15,
26 = glacial drift covering material described in
code 16,
27 = glacial drift covering material described in
code 17,
28 = glacial drift covering material described in
code 18,
29 = glacial drift covering material described in
code 19,
30 = volcanic ash and/or pumice and/or loess
covering material described in code 10,
31 = volcanic ash and/or pumice and/or loess
covering material described in code 11,
32 = volcanic ash and/or pumice and/or loess
covering material described in code 12,
33 = volcanic ash and/or pumice and/or loess
covering material described in code 13,
34 = volcanic ash and/or pumice and/or loess
covering material described in code 14,
35 = volcanic ash and/or pumice and/or loess
covering material described in code 15,
36 = volcanic ash and/or pumice and/or loess
covering material described in code 16,
37 = volcanic ash and/or pumice and/or loess
covering material described in code 17,
38 = volcanic ash and/or pumice and/or loess
covering material described in code 18,
39 = volcanic ash and/or pumice and/or loess
covering material described in code 19,
40 = volcanic ash and/or loess and glacial drift
covering material described in code 10,
41 = volcanic ash and/or loess and glacial drift
covering material described in code 11,
42 = volcanic ash and/or loess and glacial drift
covering material described in code 12,
43 = volcanic ash and/or loess and glacial drift
covering material described in code 13,
44 = volcanic ash and/or loess and glacial drift
covering material described in code 14,
45 = volcanic ash and/or loess and glacial drift
covering material described in code 15,
46 = volcanic ash and/or loess and glacial drift
covering material described in code 16,
47 = volcanic ash and/or loess and glacial drift
covering material described in code 17,
48 = volcanic ash and/or loess and glacial drift
covering material described in code 18,
49 = volcanic ash and/or loess and glacial drift
covering material described in code 19,
50 = glacial drift, 51 = glacial till, 52 = glacial
outwash, 53 = glacial lake sediments, 54 =
glacio-marine sediments, 55 = volcanic ash
and/or loess over glacial drift, 56 = volcanic ash
and/or loess over glacial till, 57 = volcanic ash
and/or loess over glacial outwash, 58 = volcanic
ash and/or loess over glacial lacustrine
sediments, 59 = glacial lacustrine deposits over
glacial till, 60 = coarse textured and/or relatively
unweathered pyroclasts, 61 = fine textured
and/or highly weathered volcanic ash, 62 = deep
pumice and/or volcanic ash (>40") on residual
colluvium, 63 = layers of aeolian ash and
pumice, 64 = aeolian pumice over highly
weathered volcanic ash, 65 = 1980 Mt. St.
Helen's ashfall over upland soil types, 66 =
alkaline loess, 67 = aeolian sand, 68 = loess,
70 = pre-1980 volcanic mudflow deposits,
71 = volcanic ash over pre-1980 volcanic
mudflow deposits, 72 = 1980 Mt. St. Helen's
volcanic mudflow deposits, 80 = mucks
81 = mucks over alluvium, 82 = peat or
decomposed organic material, 83 = decomposed
organic material with layers of non-organic
material, 84 = diatomaceous earth, 90 =
alluvium (mixed alluvium), 91 = gravelly or
cobbly alluvium (e.g. fan deposits), 92 = sandy
alluvium, 93 = silty alluvium, 94 = clayey or
fine textured or fine textured old alluvium, 95 =
sandy alluvium over sand and gravel, 96 = silty
alluvium over sand and gravel, 97 = clayey or
fine textured alluvium over sand and gravel, 98
= alluvium consisting primarily of volcanic ash,
99 = alluvium covered by volcanic ash and/or
loess.
SOILS24.35
DRAIN.RATE.CD: soil drainage rate.
Code Description:
0 = no data, 1 = very poorly drained, 2 = poorly
drained, 3 = somewhat poorly drained, 4 =
moderately well drained, 5 = well drained, 6 =
somewhat excessively drained, 7 = excessively
drained, 8 = N/A, 9 = variable - refer to public
WDNR Soil Survey.
SOILS24.35
PERC.RATE.CD: soil percolation rate.
Code Description:
0 = no data, 1 = very slow water percolation (<
0.06"/hr), 2 = slow water percolation (0.06 -
0.2"/hr), 3 = moderately slow water percolation
(0.2 - 0.6"/hr), 4 = moderate water percolation
(0.6 - 2.0"/hr), 5 = moderately rapid water
percolation (2.0 - 6.0"/hr), 6 = rapid water
percolation (6.0 - 20.0"/hr), 7 = very rapid water
percolation (> 20.0"/hr), 8 = N/A, 9 = variable -
refer to public WDNR Soil Survey.
SOILS24.39
PFLG.OPRL.CD: influence of soil type on forest
operations.
Code Description:
0 = not rated.
1 = Favorable. Stable soils sloping < 30 percent.
Forest operations (roading, load, etc.) do not
significantly impact soil productivity or erosion,
and are carried out with minimal limitations.
2 = Average. Includes stable soils sloping < 30
percent, but on which significant erosion,
compaction, or displacement might occur as a
result of forest operations.
3 = Difficult. This is characterized by one of the
following: a) stable soils sloping (30-65 percent)
or, b) soils sloping (0-65) percent and showing
evidence that rapid movement might occur as a
direct result of forest operations.
4 = Extreme. All soils sloping more than 65
percent.
PFLG.SURV.CD: soil survey area designation.
Code Description:
2 = Asotin, 4 = Chelan, 5 = Clallam, 6 = Clark,
7 = Columbia, 8 = Cowlitz, 10 = Ferry, 12 =
Garfield, 15 = Island, 18 = Kitsap, 19 = Kittitas,
20 = Klickitat, 21 = Lewis, 22 = Lincoln, 23 =
Mason, 24 = Okanagan, 26 = Pend Oreille, 28 =
San Juan, 29 = Skagit, 30 = Skamania, 31 =
Snohomish, 32 = Spokane, 33 = Stevens, 34 =
Thurston, 36 = Walla Walla, 37 = Whatcom, 39
= Yakima, 50 = West Jefferson, 51 = East
Jefferson, 52 = Tri-County (Grays
Harbor/Pacific/Wahkiakum), 53 = West Pierce,
54 = Snoqualmie Pass (East Pierce and East
King), 55 = West King, 56 = SCS Whatcom
Soil Survey Area.
productivity, and slope failure risk assessment.
(PFLG).
in digital format as thirty-six separate township
extent coverages. They were then MAPJOINED
into a single coverage and the attribute items
UNSTABLE and EROSION were added from
the SOILS.35 layer. Data documentation
updated by Mark G. Scott, May 13, 1997.