PERMFILE43275

• Permit No: M1999073
• IBM Index Class Name: Permit File
• Doc Date: 10/29/1999
• Doc Name: Permit Application Exhibits
• Media Type: D
• Archive: No

10!28/1999 17:18 F.~LY 1719258dJ09
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areas with basalt that has platey
structure. Where this platey struc-
ture occurs the basalt is considered
ripable.
Soil Area 2a
This soil area is similar to Soil
Area 2 except it occurs on gentle to
moderate slopes and the vegetation
consists of mid and short grasses
and sage brush. Because this area
is less sloping than Soil Area 2, it
is not as severely limited for some
uses such as roads, campsites and
trails.
Soil Area 3
Solis in this area are mainly between
24 and 48 inches deep over basalt
bedrock. These soils occur on gentle
to moderate slopes. They have mod-
erate to moderately slow permeabil-
ities and are well drained. Because
of the nature of the underlying ba-_
salt, occassional outcrops occur at
the surface and some pockets of soils
deeper than 48 inches are included.
The main soils in this area have a
Unified Engineering classification
of ML or CL. They have low to mod-
erate liquid limits and plasticity
indexes. Dry bulk densities are norm-
ally about 80 to 100 pounds per cubic
foot. Standard penetration blow count
ranges from five to 10.
The HEW standard percolation rates
were not tested since bedrock
usually occurs at less than 48 in-
ches, however, the USDA permeabil-
ity rates indicate that t{EW perc-
olation rates would be between 10
and 20 minutes per inch.
• dos
Based on the soil taxonomy of the
National Cooperative Soil Classifi-
cation System, these soils are clas-
sified as fine loart~y mixed family of
Typic Cryoborolls. The soil moisture
regime is aridic and the temperature
regime is frigid.
Vegetation consists of short and mid
cool season grasses with pinon and
juniper trees and some open areas of
sage brush.
Generally these soils have low to
moderate bulk densities. low to mod-
erate bearing strengths and a low to
moderate shrink-swell potential.
These engineering characteristics
should pose no problem for light,
one story dwelling structGres, how-
ever, they should be considered when
designing foundations. Because win-
ter frost may penetrate to depths of
about three feet and because of the
depth of bedrock, on-site sewage dis-
posal systems using leach lines are
not recommended in this soil area.
Sewage seepage pits or storage tanks
should function well in this area;
however, they may be difficult to
install. In most places where the
basalt bedrock was examined in Soil
Area 3, it was well fractured and had
platey structure, consequently, it is
considered ripable in most places.
In several places pipelines were in-
stalled to depths of five feet with
a back hoe across Soil Area 3 with
no particular problems noted.
Soil Area 4
Soils in this area are deep looms
and clay looms and are usually under-
lain by basalt bedrock at depths of
six to 10 feet. Soils in this area
occur on gentle to moderate slopes.
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