HomeMy WebLinkAbout20062964.tiff - Todd Hodges Design, LLC
USDA Soil Conservation Service
Panels 1 & 2: Weld County, Colorado, Southern Part
Frederick PUD
____ .. i ,.. , , , , ..„...
_,, -- -, ,,,,,, ,, #„ ,,..!..4 ...,,, 34 ,,,,
...
5 ..,zit trit
liirr...,F 24
sfete
,�� _r.+.4 ..) lig glIN
w
t
`" 1�?Jt to scale
14
CV%43411'
.w
.r-. ---A•43, ]. Fa s T' 'S 41
q
'P 32
y
�`
V k a] 52
aN.
`f w r� y 3 y't y 'c
2 t
°, it J$
{ J &'* 3
jL
EXHIBIT
1269 North Cleveland Avenue • Loveland, •Colorado 80537 • (970) 613-8556 • fax: (970) 613-8775
email: toddhodgesdesign@earthlink.net
2006-2964
Todd Hodges Design, LL C
Soil Survey of Weld County, Colorado excerpt (Southern Portion)
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #4: Aquolls and Aquepts, flooded
4—Aquolls and Aquepts, flooded. This nearly level
map unit is in depressions in smooth plains and along the
bottoms of natural drainageways throughout the survey
area. Aquolls, which have a dark colored surface layer,
make up about 55 percent of the unit. Aquepts, which
have a lighter colored surface layer, make up about 25
percent. About 20 percent is soils that are well drained
and soils that have sandstone or shale within 48 inches of
the surface.
These are deep, poorly drained soils that formed in
recent alluvium. No one pedon is typical. Commonly the
soils have a mottled,mildly to moderately alkaline loamy
or clayey surface layer and underlying material that ex-
tends to a depth of 60 inches or more.In places they have
a gleyed layer in the underlying material.
Most of the acreage is subject to excessive runoff. The
water table is at or near the surface in spring and during
the peak of the irrigation season.
These soils are used for rangeland and wildlife habitat.
Some small areas are irrigated pasture.
The potential native vegetation is dominated by
switchgrass, prairie cordgrass, saltgrass, alkali sacaton,
big bluestem, indiangraas, western wheatgrass, slender
wheatgrass, sedge, and rush. Cattails and bullrush grow
in the swampy spots associated with these range sites.
Potential production ranges from 4,000 pounds per acre in
favorable years to 3,000 pounds in unfavorable years. As
range condition deteriorates, the tall and mid grasses
decrease,production drops,and saltgrass,sedge,and rush
increase.The farming and irrigation in adjacent areas has
increased the amount of salts on much of the acreage.
Management of vegetation on this soil should be based
on taking half and leaving half of the total annual produc-
tion. Switchgrass, big bluestem, indiangrass, western
wheatgrass, pubescent wheatgrass, intermediate wheat-
grass, tall wheatgrass, and tall fescue are suitable for
seeding. The plants selected should met the seasonal
requirements of livestock. For successful seeding, a firm
prepared seedbed is needed. A grass drill should be used.
Seeding early in spring has proven most successful. Til-
lage is needed to eliminate the undesirable vegetation.
Wetland wildlife, especially waterfowl, utilize this unit.
The wetland plants provide nesting and protective cover
as well as some food. The nearby irrigated cropland,
where wildlife obtain much of their food and fmd protec-
tive cover, makes this unit valuable to both wetland and
openland wildlife.
Openland wildlife,especially pheasant, use this unit for
cover and nesting. Deer fund excellent cover in some
areas. These valuable wildlife areas should be protected
from fire and fenced to prevent encroachment and
overuse by livestock. They should not be drained. Capa-
bility subclass VIw; Aquolls in Salt Meadow range site,
Aquepts in Wet Meadow range site.
1269 North Cleveland Avenue • Loveland, Colorado 80537 • (970) 613-8556 • fax: (970)613-8775
email: toddbodgesdesign(a;earth/ink.net
s Todd Hodges Design, LLC
Soil Survey of Weld County, Colorado excerpt
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #9: Ascalon loam
9— Ascalon loam. Ito 3 percent slopes. This is a deep,
well drained soil on terraces at elevations of 4,600 to 4.900
feet. It formed in alluvium deposited by the major rivers
in the survey area. Included in mapping are small areas
where sand awl gravel are within a depth of 60 inches.
Also included are small areas of soils that have a clay
loam subsoil.
Typically the surface layer of this Ascalon soil is brown
loam about 10 inches thick. The subsoil is brown and yel-
lowish brown sandy clay loam about 15 inches thick. The
substratum to a depth of 60 inches is calcareous sandy
loam.
Permeability is moderate. Available water capacity is
high. The effective rooting depth is 60 inches or more.
Surface runoff is medium,and the erosion hazard is low.
This soil is used almost entirely for irrigated crops. It
is suited to all crops commonly grown in the arca, includ-
ing corn,sugar beets. beans, alfalfa, small grain, potatoes,
�.� and onions.An example of a suitable cropping system is:i
to 4 years of alfalfa followed by corn, corn for silage,
sugar beets, small grain, or beans. Land leveling, ditch
lining, and installing pipelines may be needed for proper
water application.
All methods of irrigation are suitable, but furrow ir-
rigation is the most common. Barnyard manure and com-
mercial fertilizer are needed for top yields.
Windbreaks and environmental plantings of trees and
shrubs commonly grown in the area are generally well
suited to this soil. Cultivation to control competing
vegetation should be continued for as many years as
possible following planting.Trees that are best suited and
have good survival are Rocky Mountain juniper, eastern
redcedar, ponderosa pine. Siberian elm, Russianolive,and
hackberry.The shrubs best suited are skunkbush sumac,
lilac, Siberian peashrub,and American plum.
Wildlife is an important secondary use of this soil. The
cropland areas provide favorable habitat for ring-necked
pheasant and mourning dove. Many nongame species can
be attracted by establishing areas for nesting and escape
cover. For pheasants, undisturbed nesting cover is essen-
tial and should be included in plans for habitat develop-
ment,especially in areas of intensive agriculture.
This soil has good potential for urban and recreational
development. Increased population growth in the survey
area has resulted in increased homesite construction. The
chief limiting soil features for urban development are the
shrink-swell potential of the subsoil as it wets and dries
and the limited ability of this soil to support a load.Septic
tank absorption fields function properly, but community
sewage systems should be provided if the population den-
sity increases. Because of the moderately rapid permea-
bility of the substratum, sewage lagoons must be sealed.
Lawns, shrubs, and trees grow well. Capability subclass
Ile irrigated.
1269 N. Cleveland Avenue •Loveland, CO 80537 • (970) 613-8556 • fax: (970) 613-8775
email: toddhodgesdesign@earthlink.net
Todd Hodges Design, LLC
Soil Survey of Weld County, Colorado excerpt
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #24: Fort Collins loam
24—Port Collins loam, I to 3 percent slopes.This is a Management of vegetation on this soil should be based
deep,well drained soil on terraces and plains at elevations on taking half and leaving half of the total annual produc-
of 4,500 to 5,050 feet. It formed in alluvium modified by Lion.Seeding is desirable if the range is in pour condition.
this eolian tiencsita.Included in mapping are some leveled Sideoats grams, little bluestem, western wheatgrass,blue
areas and few small areas of a soil that m calcareous at grams,pubescent wheatgrass,and crested wheatgrass art'
the surface. suitable for seeding.The grass selected should meet the
Typically the surface layer of this Fort Collins soil is seasonal requirements of livestock It can be seeded into
grayish brown loam about 7 inches thick. The subsoil is a clean, firm sorghum stobblo, or it can be drilled into a
brown and very pale brown clay loam and loam about 17 firm prepared seedbed. seeding early in spring has
inches thick The substratum to a depth of 60 inches is proven most successfuL
fine sandy loam. Windbreaks and environmental plantings of trees and
Permeability Is moderate. Available water capacity is shrubs commonly grown in the area are generally well
high. The effective rooting depth is 60 inches or more. suited to this soil oattivation to control competing
Surface runoff is medium,and the erosion hazard is low. vegetation should be continued for as many years as
In irrigated areas this soil is suited to all crops corn- possible following planting Trees that are best suited and
monly grown in the area, including corn, sugar beets, have good survival are Rocky Mountain juniper, eastern
beans(fig.6),alfalfa,small grain,potatoes,and onions.An redeedar,ponderosa pine,Siberian elm,Rusaian-olive,and
example of a suitable cropping system is 3 to 4 years of hackberry. The shrubs beat suited are skunkbushh sumac,
alfalfa followed by corn,corn for adage,sugar beets,small lilac,Siberian peaahrub,and American plum.
gram, or beans. Land leveling, ditch lining,and installing Wildlife is an important secondary use of this soil.The
pipelines may be needed for proper water applications cropland areas provide favorable habitat for ring-necked
An methods of irrigation are suitable, but furrow in pheasant and mourning dove. Many nongame species can
ngatton it the moat common. Barnyard manure and tom- be attracted by establishing areas for nesting and escape
Inercial fertilizer are needed for top yields cover For pheasants, undisturbed nesting cover is esson-
In nonirrigated areas this Soil is suited to winter wheat, tial and should be included in plans for habitat develop-
barley, and Sorghum. Mast of the acreage is planted to meat,especially in areas of intensive agriculture. Range-
winter wheat The predicted average yield is 2b bushels land wildlife, for example, the pronghorn antelope,can be
per acre. The soil is summer fallowed in alternate years attracted by developing livestock watering facilities,
to allow moisture accumulation.Generally precipitation is managing livestock grazing,and reseeding where needed.
too low for beneficial use of fertilizer This soil has good potential for urban and recreational
Stubble mulch fanning,striperopping,and minimum tit- development. Road design can be modified to compensate
lags are needed to control soil blowing and water erosion. for the limited capacity of this soil to support a load.
The potential native vegetation is dominated by blue Capability subclass He irrigated, We nonirrigated;
grams Several mid grasses, such as western wheatgrass t n.,nv Plains ranee site.
and needleandtbread, are also present. Potential produc-
tion ranges from 1,600 pounds per acre in favorable years
CO 1,000 pounds in unfavorable years As range condition
deteriorates, the mid grasses decrease; blue grams, buf-
fdograss, anakeweed, yucca, and fringed sage increase;
and forage production drops. Undesirable weeds and an-
nuals invade the site as range condition becomes poorer.
1269 N. Cleveland Avenue •Loveland, CO 80537 • (970) 613-8556 • fax: (970) 613-8775
email: toddhodgesdesign@earthlink.net
' Todd Hodges Design, LLC
Soil Survey of Weld County, Colorado excerpt
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #32: Kim Loam, 1 to 3 percent slopes
32--Kim loam, 1 to 1 percent slopes- This is a deep, The potential native vegetation is dominated by blue
well drained pal: an growth plwm and aliuvlal (gm at gnamr Several mid presses, such as western wheatgraRn
elevations of 4900 to 5,250 feet.It formed in mixed eolian and needleandthread, are also present Potential praduc-
depuait and parent sediment from a wide variety of twin ranges fret 1,600 powhdu per Rrte in(avnrable years
bedroel( Included in mapping are small areas of soils that to 1,000 pounds in unfavorable yearn As range condition
nave loamy sand tmdexlying materal. deteriorates, the mid grasses decrease, blue grams, buf-
Typica➢y the surface layer ie brown and pale brown falograss, snakeweed. yucca, and fringed sage increase,
loam about 12 maws thick_The upper 2S inrhty of the un- and forage production drops. Undesirable weeds and %a-
derlying material is pale brown loam. The lower part to a numbs invade the site as range condition becomes poorer
depth of 6D inches is pads brown fine sandy loam- Management men au vegetation on this otl should be bated
Permeability is moderate. Available water capacity is on taking half and leaving half of the total annual produc-
tion
high The effective rooting depth is 60 inches or more. Sidetion-Seeding w l ble i, the range is in poor racoys. btu
Surface nineff is medium,and the erosion hazard is low. SideoeV)camebases little blucetem, westeni wbeatraas, blue
In irrigates areas this soil is suited to all crops corn- gram&pubeseenl g.w The rese.and crested whesytrass are
monly grown in the area, including corn, sugar beets, seasonsuitable for seeding. grass selected c nhoukd meet the
beans,alfalfa,email grain,potatoes,and onions An exam- seasonal requirements of livestock It can be seeded into
pie of a suitable cropping system re 8 to 4 years of alfalfa fia clean, firm nurghuni as see, nor it can be dolled into a
followed by corn,cent for silage,sugar beets,small gram, proven orn pt cost successful.
seeding early +r, s}v+ng ha
or beans Land levebn ditch lining(fig.6), and installing most stra elnl.
g. g• Windbreaks and environmental plantings of trees snit
pipelines may he needed for proper water applications shrubs commonly grown in the area are generally well
All methods of irrigation are suitable, but furrow in suited to this soil Cukivatiao fo <wiird competing
rsgatioe is the most common Barrtvatd manure and teen- vegetation should be continued for as many vents as
mercial fertilizer are needed for top yields possible following planting.Trees that are beat suited and
In nomrngated areas this awns suited to winter wheat, have good survival are Rocky Mountain Juniper, eastern
parley, and sorghum. Mast of the acn2age ra planted to redcefar, ponderosa pine,Srbenan elm, Russran-ohve, and
winter wheat and is summer fallowed in alternate yearn hackberry. The shrubs best suited are skunkbush sumac,
to allow rootatur'e accumulation.Generally precipitation is lilac,Siberian peashnib,and Amencan plum_
toolow for beneficial use of fertiliser. Wildlife is an important secondary use of this soil. The
8tmhhte mulch fanning. slriprropping,and miiiimimt tu• cropland areas provide favorable habitat for nng•nerked
fage are needed to control sod blowing and water erosion pheasant awl mourning dove. Many nongame species can
'terracing also may be needed to control water erosion. be attracted by establishing areas for nesting and escape
cover For pheasants, undisturbed nesting rover is essen-
tial and should be included in plans for habitat develop-
ment, especially in areas of intensive agriculture Range-
land wildlife, for example, the pronghorn antelope, can be
attracted by developing livestock watering facilities,
managing livestock grazing,and reseeding where needed.
This soil has good potential for urban and recreational
development Increased population growth in the survey
area has resulted in increased homesite constriction.The
chief limiting soil feature for urban development and road
construction is the limited capacity of this soil to support
a load Septic tank absorption fields function properly,but
community sewage systems should be provided if the
population density increases. Because of the permeability
of the substratum, sewage lagoons must be sealed
Lawns, shrubs, snd trees grow well Capability subclass
Ile irrigated, IVs nonierigated: Loamy Plains range site
1269 North Cleveland Avenue • Loveland, Colorado 80537 • (970) 613-8556 • fax: (970)613-8775
email: todtlhodgesdesign(agwest.net
v Todd Hodges Design, LLC
Soil Survey of Weld County, Colorado excerpt (Southern Portion)
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #33: Kim Loam, 3 to 5 percent slopes
33—Mini loam, 3 to u percent eloper. This is a deep. Permeability is moderate Available water rapacity is
well drained soil on plains and alluvial fans at elevations high The effective rooting depth is 60 inches or more
of 4,900 to 6250 feet. It formed in mined euhan deposits $urfsce runoff is Rhenium, and the erosion hazard is
and parent sedmient from a wide variety of bedrock In- moderate.
chided in mapping are snail areas of soils that have In irrigated areas this soil is sited to crops commonly
loamy sand underlying material grown in the area Perennial grasses and alfalfa or close
Typically the surface layer is brown end pale brown grown craps shouts be grown at least 50 percent of the
loam about 10 inches thick The upper 28 inches of the on. time Contour ditches and corrugat ois can be used rn it
denying material is pale brown loam.The lower part to r riesling close grown crops and pasture Furrows,conttour
depth of ec metier is pale brown fine sandy loam. furrows, and crow slope furrows are suitable Per row
crops. Spnnkler irrigation is also suggested. Keeping til-
lage to a minimum and utilising crop residue help to con-
trol erosion. Maintaining fertility is important Crops
respond to applications of phosphorus and nitrogen.
In nonirngated areas this soil is suited to winter wheat.
barley, and sorghum Most of the acreage is planted to
winter wheat The predicted average yield is 28 bushels
per acre. The soil is summer (allowed in alternate years
to allow moisture accumulation.Generally precipitation is
too low for beneficial use of fertilizer
Stubble mulch farming,etnperopping,and minimum til-
lage are needed to control soil blowing Arid water erosion
Terracing also iney be needed to control water erosion.
The potential native vegetation is dominated by blue
grams. Several mid grasses,such as western wheatgtnsa
and needleandthread. are also present Potential produc-
hors ranges from 1,600 pounds per acre m favorable years
to 1.000 pounds in unfavorable years. As range condition
detcnoratea, the mid grasses decrease; blue grams, buf-
faiograss, snakeweed 1'u. and fringed rage increase:
and forage production drops. Undesirable weeds and an-
neals invade the site as range condition becomes poorer.
Management of vegetation on this soil should be based
on taking half sod ksifag het(of the total anima-'produc-
tion Seeding is desirable if the range is m pier condition
Sideoats gaina,little bluestern,western wheetgrsaa,blue
grams,pubescent wheetgrass,and created wheatgraaa are
seam& for needing The grass selected shouts meet the
seasonal requirements of livestock It cart be seeded into
a clean, firm sorghum stubble. or it can be drilled into a
firm prepared seedbed Seeding early in spring has
proven most successful
Windbreaks and environmental plantings of trees and
shrubs commonly grown in the area are generally web
suited to this sod Cultivation to control competing
vegetation should be continued for as ninny years as
possible following planting Trees that are beat suited and
have good survival are Reeky Mountain juniper, eastern
redcedar,ponderosa pine,Siberian elm,Russian-olive,and
luckberry 0'he ehruhe best suited are akunkhush nowt,
lilac,Siberian peashrub,and Amencan plum
Wildlife is an important secondary use of this soil The
cropland areas provide favorable habitat for ring-necked
pheasant and mourning dove. Many nongaine species can
be attracted by establishing arena for meeting and escape
cover For pheasants,undisturbed nesting cover is essen-
tial and should be included in plans for habitat develop-
ment,especially in areas of intensive agficulture. Range-
1269 North Cleveland Avenue • Love/and, Colorado 80537 • (970) 613-8556 • fax: (970)613-8775
email: toildhodgesdesign(aearthlin k.net
`T Todd Hodges Design, LLC
Soil Survey of Weld County, Colorado excerpt
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #34: Kim loam, 5 to 9 percent slopes
34—Kim loam, 5 to 9 percent slopes. This Es a deep, can be drilled into a firm prepared seedbed. Plowing and
well drained soil on plains and alluvial fans at elevation', drilling on the contour minimize runoff and soil losses.
of 9,900 to 5,250 feet. It formed in mixed eolian deposits Seeding early in spring has proven moat successful.
and parent sediment from a wide variety of bedrock. In- Windbreaks and environmental plantings are generally
eluded in mapping are small areas of soils that have well suited to this soil. Cultivation to control competing
loamy sand underlying material. vegetation should be continued for as many years se
Typically the surface layer is brown and pale brown possible following planting.Trees that are best suited and
Loam about 10 Inches thick The upper 25 inches of the un- have good survival are Rocky Mountain juniper,esatern
derlying material is pale brown loam.The lower part to a redeedar, ponderosa pine,Siberian elm,Russian-olive,and
depth of 60 inches is pale brown fine sandy loam. hackberry. The shrubs best suited are skunkbush sumac,
Permeability is moderate. Available water capacity in lilac.Siberian peashrob,and American plum.
high. The effective rooting depth is 60 inches or more. Wildlife is an important secondary use of this Boil_The
Surface runoff is rapid, and the erosion hazard is cropland areas provide favorable habitat for ring-necked
moderate. pheasant and mourning dove. Many nongame species can
This soil is suited to limited cropping. Intensive be attracted by establishing areas for nesting and escape
cropping is hazardous because of erosion. The cropping cover.For pheasants,undisturbed nesting coves is emen-
system should be limited to such close grown crops as al- tial and should be included in plans for habitat develop-
falfa, wheat, and barley. This soil also is suited to ir- meat, especially in areas of intensive agriculture. Range-
rigated pasture A suitable cropping system is 3 to 4 land wildlife, for example,the pronghorn antelope,can be
years of alfalfa followed by 2 years of corn and small attracted by developing livestock watering facilities,
gram and alfalfa seeded with a nurse crop. managing livestock grazing,and reseeding where needed.
Close grown crops can be irrigated from closely spaced This soil has good potential for urban and recreational
contour ditches or sprinklers. Contour furrows or aprin- development. Increased population growth in the survey
klers should be used for new trope Applications of area has resulted in increased homesite construction.The
nitrogen and phosphorus help in maintaining good produc- chief limiting soil feature for urban development and road
lion. construction is the limited capacity of this soil to support
The potential native vegetation is dominated by Woe a load.Septic tank absorption fields function properly,but
grams. Sideoate grama, little bluestem, western wheat- community sewage systems should be provided if the
grass,and sedge are also prominent Potential production population density increases. Because of the permeability
ranges from 1,800 pounds per acre in favorable years to of the substratum, sewage lagoons must be sealed.
1,500 pounds in unfavorable years. As range condition Lawns, shrubs, and trees grow well. Capability subclass
deteriorates, the sideosts grams and little bluestem IYe irrigated,Vle nonirrigated; Loamy Plains range site.
decrease; forage production drops; and blue grams, buf-
faingress, and several perennial forbs and shrubs in-
crease. Undesirable weeds and annuals invade the site as
range condition becomes poorer.
Management of vegetation should be based on taking
half and leaving half of the total annual production.Seed-
ing is desirable if the range is in poor condition. Sideoats
grams, little bluestem, western wheatgrass, and pu-
bescent wheatgraes are suitable for seeding. The grass
selected should meet the seasonal needs of livestock It
can be seeded into a clean, fire sorghum stubble, or it
1269 N. Cleveland Avenue •Loveland, CO 80537 • (970) 613-8556 • fax: (970) 613-8775
email: toddhodgesdesign*earthlink.net
Todd Hodges Design, LL C
Soil Survey of Weld County, Colorado excerpt (Southern Portion)
Published by the United States Department of Agriculture
Soil Conservation Service
In Cooperation with Colorado Agricultural Experiment Station
Issued September 1980
Soil Classification #42: Nunn Clay Loam, 1 to 3 percent slopes
42—Nunn clay loam, I to :3 percent slopes. This is a The potential motive ire gnbdimn is dominated by
deep, well drained soil on terraces and smooth plains at western wheatgrass and blur grams. fluffaloKn,ss rs also
cdex aeons of 4,51.41 IA 5,15o feet. It foamed in o I sed +llu Potential production ranges lases I coal pounds
vinin and cation deposits included in mapping are small, tpresent_ 1
per acre m f:nor,,lde years t an uspmmlsfen in 1 SIp rablr
long and narrow areas of sand and gravel deposits and
soon As range condition deteriorates, a blur gretna-Lul'-
small areas of soils that an subject to occasional flooding. I'alugrass sod forma. Undesirable weeds and annuals in
Sonic Leveled areas are also urduded vatic the site as range condition becomes poorer.
Tvpirally the surface layer of this Nunn sod is grayish Management of vegetation of this soil should be based
brown clay loam :rebut 9 inches thick The subsoil is light or, taking half anti leaving half of the total annual produe-
brownish gray clay loam alkali 14 inches thick. The tipper lion. Range pitting can help in reducing runoff. Seeding is
part of the substratum is light brownish gray clay loom. desirahle if the range is in poor condition. Western
The lower part to a depth of fill inches is brown sandy wheatgrass. blue grtma, sideonts grania, baffalogr ss, per
loam- beacent wheatgrass, and crested whealgrass are suitable
Pernn-ability is moderately slow. Aviolable w atar I'or seeding. The gnaws selected should meet the seasonal
capacity is high. The effective rooting depth IS 60 inches requirements of livestock. It ran be seeded into a clean,
or more. Surface runoff is medium, and the erosion fins sorghum stubble, or it can be drilled into a firm
hazard is low. prepared seedbed. Seeding early in spring has proven
In irrigated areas this soil is suited to all crops cone most successful.
� . monly grown In the area, including corn, sugar Wets, Windbreaks and environmental plantings are generally
beans, alfalfa, small grain. potatoes,anti onions. An exam- well suitwl to this soil_ Cultivation to control competing
ple of a suitable cropping system is 3 to 4 ycan of alfalfa vegetation should be continued for as many years as
followed by corn,corn for silage, sugar beets,small grins, possible following planting.'frees that are best suited and
or beans. Generally such characteristics as the high clay have gold sun•ival are Rocky Mountain juniper. eastern
content or the rapidly permeable substratum slightly redeedar, lwncieraa pine,Sibenan elm, Russian olive, anti
restrict some crops. luaekberry. The shrubs best suited are skunkbush sumac,
All methods of irrigation are suitable, but furrow it lilac,Siberian peashnib,and American plum
ngation w the most common. Proper irrigation water Wildlife is an in;it ant secondary use of this soil The
management is essencial. Rarnyartl manure and comnu•r- cropland areas provide favorable habitat for ring-necked
teal fertilizer are needed for top yields. pheasant anti mourning dove. Many non game species can
In noturrigaletI areas most of the acreage Is in small be attract cd by establishing arias for misting anti escape
grain and It is summer fallowed in alternate years. ,,over. For pheasants, undisturbed nesting cover is esstm-
Winter wheat is the print-and crop.The predicted average Gal and should be included in plans for nabitd develop-
yield is 33 Nosh.-Is per acre If the crop is wirterkillel' anent, espeeia lly in eras of intensive agriculture. Rxnge-
.apnng wheat can be seeded'Generally precipitation as I'm land wildlife, for example, the pronghorn antelope, can be
low fin-beneficial use of fertilizer
Stubble mulch fanning, atriperopping,and minimum tih attracted by developing Itvii rase watering faeilitit•s.
managing livestock miming,told reseeding where needed
loge arc needed to control soil blowing and water erosion This soil has fair to poor potential for urban develop
nurmt. It has moderate to high shrink swell, low strength,
and moderately slow permeability. These features create
problems it, dwelling and road construction Those areas
that have loans or sandy main in the lower part of the
substratum are suitable for Se;Ode tank absorption fields
and foundations. Sane•. areas of this soil are adjacent to
streams and are subject to occasional flooding The poten-
tial is fair for such recreate on:,l development as camp and
picnic areas and playgrounds. Capability subclass Ile ir-
rigated, tile nonirrig:led,Clayey Plains range site
2412 Denby Court • Fort Collins, Colorado 80526 • (970) 207-0272 • fax: (561)828-8059
email: toddhodgesdesign@a,earthlink.net
CTLITHOMPSON
July 28, 2006
Christine Frederick
2090 Hollis Crossing Road
Cumberland Furnace, TN 37051
Attention: Ms. Frederick
Subject: Preliminary Percolation Study for a Proposed Subdivision
Frederick PUD
Part of the SE Y4 of Section 15, T7N, R67W of the 6th PM
Weld County, Colorado
Project No. FC03823-130
As requested, we have prepared this preliminary percolation study for the
proposed subdivision. The preliminary percolation study is required by the Weld
County Department of Public Health and Environment (WCDPHE) to characterize
subsurface conditions where onsite wastewater systems(OWS)are to provide sewer
service for residential lots of less than 5 acres.
PROPOSED CONSTRUCTION
The proposed development is to consist of 9 rural-residential lots, an outlot
and one paved roadway(Figure 1). Five of the proposed lots are less than 5 acres.
Three of the proposed lots range from approximately 5 acres to 8 acres. Lot 9 is 116
acres with a 2.1 acre building envelope. Potable water is to be supplied by a public
water supplier.
SITE DESCRIPTION
The proposed subdivision is located approximately 3.5 miles northwest of
Severance, northwest of Weld County Roads 21 and 80. The 153±-acre property is
currently used for agricultural purposes. A pond that will be used for future storm
water detention is located at the southeast end of the property and extends into Lot 2.
A flood zone is located along the east and north sides of the property and crosses
into the east sides of Lots 6,7 and 8. Ground cover was sparse to barren and on the
partly plowed ground.
SUBSURFACE CONDITIONS
The subsurface conditions were investigated by observing the drilling of two
profile holes to a depth of 9 feet and two percolation holes to depths of 34 inches to
36 inches near each profile hole. Subsurface conditions exposed in Profile 1
consisted of a few inches of topsoil underlain by sandy clay to the depths explored as
presented on Figure 2. Subsurface conditions exposed in Profile 2 consisted of a few
inches of topsoil underlain by clayey sand to the depths explored. Four percolation
holes were tested with percolation rates of 40,40, 10 and 13 minutes per inch (mpi).
The slowest percolation rates were obtained at Profile 1 where sandy clays were
encountered. No free ground water was observed in the profile holes during drilling
and one day after drilling.
CONCLUSIONS
Our observations of the subsurface conditions and percolation rates indicate
suitable conditions for supporting conventional OWS in the areas observed. We have
observed additional exploratory borings during a subgrade investigation for the
proposed roadway that indicates the majority of the lots may be located over the
clayey sands which showed the more rapid percolation rates. Drain field sizes for 4-
bedroom residences could range from 1300 square feet to 2200 square feet based on
the percolation rates we observed. Site specific percolation tests will be required for
each lot and will most likely result in a range of percolation rates. However, we
believe percolation rates that support conventional OWS can be found on each lot.
Some lots will have restrictions that will limit OWS placement or require
special precautionary measures to protect the OWS from potential flooding. Drain
field and septic tank locations on Lot 2 will need to meet setback requirements from
the pond. A typical setback from the pond to a drain field serving up to 4 bedrooms in
a residence is 100 feet. Parts of Lots 6, 7 and 8 are located in a flood zone. Septic
tanks located in Flood Zone A should be anchored by acceptable means to prevent
floatation in the event of flooding. Other requirements may be required by the
National Flood Insurance Program and WCDPHE. Although we observed no ground
water in our profile holes,shallow ground water levels may be present in Flood Zone
A. Installation depths of drain fields may be limited in those areas so that there will be
at least 4 feet of separation from the bottom of the drain field to the maximum
predicted ground water level.
Options may be available that can change the allowed sizes of drain fields.
Gravel-less chambers, such as Infiltrator® chambers, can be used to substitute the
conventional gravel matrix within the drain field. A size reduction may apply and will
vary with the chamber selected. Dosing the drain field with either a pump or dosing
siphon can enhance the performance of the drain field, and a size reduction may be
applicable. The flow to trenches or multiple beds can be separated so that flows can
be alternated, allowing a section of the drain field to rest. Alternating the drain field
sections can enhance the performance and lengthen the life. Some fixtures,such as
garbage disposals, washing machines, water treatment systems, can increase
demand on the OWS and additional flows should be accounted for in the capacity of
the OWS.
SEPTIC TANK DEPTHS
There are several issues that can affect the depth of septic tank installation
that the owner and installer should discuss before the final installation elevation is
selected. Proposed elevations of finished floors, building sewer and grading
elevations will be needed to plan the OWS. Depending on the configuration of the
proposed structure and the site grading, gravity flow from the houses to the septic
CHRISTINE FREDERICK 2
FREDERICK PUD
CTLIT PROJECT NO.FCO3823-130
S:\PROJECTS\FC03800-FC03899\FC03823.000-Frederick PUD\130-Special Projects- OWS Design\Report 8 Letters\FC03823 Prelim
Perc.doc
tanks may or may not be feasible. County regulations and manufacturer's septic tank
requirements may limit the depths that septic tanks can be installed. Accessibility for
periodic pumping of the tanks should also be considered for planning septic tank
placement. In most cases,we feel the installation of depth of septic tanks should be
no more than 2 feet from the top of the tanks to the finished grade. Tanks installed
deeper than this amount may be difficult to access, service and maintain and may
require strengthening due to the pressures of overburden soil.
LIMITATIONS
Accepted industry standards, methods and state and/or county guidelines
were used to conduct this study. Exposure to subsurface conditions is limited from
observations of borings and pits. Variations of subsurface conditions present under
the drain field sites may exist from that observed in the profile holes. Site specific
percolation tests will be required for each structure that is served by an OWS. Typical
wastewater flows and characteristics for residential dwellings are provided by state
and/or county guidelines. In some cases actual flows and characteristics may vary
substantially from typical estimates.
CTLIThompson appreciates the opportunity to be a member of your team. If
you have any questions regarding the information in this report, please do not
hesitate to contact us at your convenience.
Very truly yours,
CTLjTHOMPSON, INC. "pF PROFE$S/1I.F
ti��SE •%%%%%%% °�9t�hii
•
� • •Q 10516 F• -
;s . AIPG y�
Thomas W. Finley, CPG .; '•. `;•\3_'
Senior Geologist I t�74SE VI.c G'"'
Reviewed by: RED/
Os�
0
3
:ca 3551 �.
•
R.B. "Chip" Leadbetter, III, P -a '�a v
Project Engineer ^ •., ���
(
c'4/Or.l At.E \
3 copies sent)
1 cc: Wohnrade Civil Engineers, Inc., 337 West Main Street, Barrington, Illinois
60010 (2 copies)
Todd Hodges Design, LLC, 1269 N. Cleveland Ave., Loveland, CO 80537 (5
copies)
CHRISTINE FREDERICK 3
FREDERICK PUD
CTLIT PROJECT NO.FCO3823-130
S:\PROJECTS\FC03800-FC03899\FC03823.000-Frederick PUD\130-Special Projects- OWS Design\Report&Letters\FC03823 Prelim
Perc.doc
(it HWY 14
SITE
SCALE: 1"=5001 CR 80.5
n CR 80
illip
N
N
ix
LEGEND:
Profile-1 INDICATES APPROXIMATE HWY74
• LOCATION OF PROFILE HOLE
(TWO PERCOLATION HOLES VICINITY MAP
LOCATED NEAR EACH (SEVERANCE AREA)
PROFILE HOLE) NOT TO SCALE
I
- N
I'..,---
'AYY' �\ "L
\ A
m•m I
.K
I L I `
I T,. , i ,
I
I
I
I
I - LOT Ig
v .n l
LOTe / mu
„6 Q.Acres III / Profile-2 ,,` I" ,`,,
-- r
FLOOD ZDrrEc I II 0 vp.o-j l₹
I le
1 1 'g
1 I LOTbst�B I
I
It
_._ —Bu11 for
Emwop./ L -1, J
/ Ipr LOT / I
\Na7 a ii I
`
M s-4' LOTS �) I FLOOD ZONE I
Profile-1
, ;
, a . _... _. OOnOTA i I ILOT{ / ..
z. .m.
i �-_�`mn / i Existing Pond . I
BUNSnpET9 '� LOT2 --
I for LOTS 1
I (NWn4b 1) LOT3 I LOTt ,xc-.
I I
L L z,. W I L
z-a JL �, '`,
$ - - - - - - COUNTY ROAD 80 - - - -
Locations of
Profile Holes
CHRISTINE FREDERICK
FREDERICK P.U.D. FIGURE
CTL I T PROJECT NO.F003823-130
7
PROFILE-1 PROFILE-2
0 - 0
— e -7 —
e
— 2 / !-I 2 —
/ -
-el
- 4 , j8/12 �'_�15/12 4 —
— 8 / • Y 8 —
w- , L -w
W
U-
= 10 10 =
F-_ H
w -C-
° - 12 12 -°
- 14 14 -
- 16 16 -
- 18 18 -
- 20 20
LEGEND:
lI CLAY,SANDY,SLIGHTLY MOIST TO MOIST,STIFF,BROWN(CL)
1 1 SAND, CLAYEY,SLIGHTLY MOIST TO MOIST, MEDIUM DENSE, BROWN(SC)
8 DRIVE SAMPLE.THE SYMBOL 8/12 INDICATES 8 BLOWS OF A 140-POUND HAMMER
FALLING 30 INCHES WERE REQUIRED TO DRIVE A 2.5-INCH O.D.SAMPLER 12 INCHES.
0
z
a
E
r
a NOTES:
O
1. THE BORINGS WERE DRILLED ON JULY 11,2006 USING 4-INCH DIAMETER
CONTINUOUS-FLIGHT AUGERS AND A TRUCK-MOUNTED DRILL RIG.
0
,, 2. THESE LOGS ARE SUBJECT TO THE EXPLANATIONS,LIMITATIONS AND CONCLUSIONS IN
LE THIS REPORT.
0
z
w
O
IL
x ,e".,
z
w SUMMARY LOGS OF PROFILE HOLES
0
m CHRISTINE FREDERICK
o FREDERICK P.U.D. FIGURE 2
O CTL I T PROJECT NO.FC03823-130
PERCOLATION TEST RESULTS
W
DEPTH DEPTH PERC
PERC DEPTH MINUTES START END CHANGE RATE
HOLE (inches) (inches) (Inches) (inches) (MPI)
1A 34 30 27.50 28.50 1.00
30 28.50 29.50 1.00
30 28.25 30.00 1.75
30 27.75 29.13 1.38
30 28.13 29.13 1.00
30 27.75 28.50 0.75
30 27.50 28.25 0.75 40
30 28.25 29.25 1.00
1B 36 30 28.25 29.50 1.25
30 29.50 30.75 1.25
30 30.75 32.00 1.25
30 31.00 32.25 1.25
30 29.50 30.50 1.00
30 30.50 31.88 1.38
30 31.88 33.75 1.88
30 30.13 30.88 0.75 40
2A 34 30 26.88 32.13 5.25
30 27.75 30.63 2.88
30 26.88 30.00 3.13
30 27.38 31.50 4.13
!"'^ 30 27.50 30.75 3.25
30 27.00 29.88 2.88
30 27.50 30.63 3.13 10
30 27.13 30.50 3.38
2B 34 30 27.50 33.88 6.38
30 27.75 30.63 2.88
30 27.88 32.25 4.38
30 28.25 33.88 5.63
30 27.75 30.50 2.75
30 28.25 30.63 2.38 13
30 27.38 30.88 3.50
30 28.13 31.75 3.63
CHRISTINE FREDERICK
FREDERICK PUD
CTL I T Project No. FC03823-130 Figure 3
Hello