HomeMy WebLinkAboutBRANDEE S-5032
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
PLATTING OR PLANNING AND ZONING CASE REVIEW
PETITION FOR REZONING
SPECIAL EXCEPTION
VACATION
RE6UBDIVISION ~
DATE RECEIVEDJ', ~" 7~
COMMENT TO PLANNING BYJ~' ~"' 7~I~
FOR MEETING OF ..~&.,- 7--" 7~Ir
of Cases
COMMENTS:
ENVIRONMENTAL SANITATION: PUBLIC WATER NOT AVAILABLE
PUBLIC SEWER NO'I' AVAILABLE TO SERVICE PETITION
t"~_. - I~, ~ .-- ' ....
ENVIRONMENTAL ENGINEERING:
71-014 (9/76)
un cipalit¥ of Anchorage
MEMORANDUM
DATE: January 30, 1979
TO: Planning Department
FROM: Health and Environmental Protection
SU~EC~ Case Review ...................................... ~-~
S5032:~..Brandee Subdivision - additional comments~-
--We--request information on reclaim of water drainage
S5037: Leland-Stanford Subdivision
Due to new information submitted by Dowling and
Associates, this department can approve the preliminary
petition. However, soils and percolation test must
be review'ed prior to final approval by this department
John L. Lynn
Environmental Specialist
JLW/ljw
91-010 (4'76)
ANCHORAGE, ALASKA 99503
PHONI~ 907 278-1551
December 1, N~ALITY OF ANCHORAGE
DEPT. OF HEALTH &
ENVIRONMENTAL PROTECTION
Municipality of Anchorage
City Hall Annex
630 W. Fifth Ave.
Anchorage, Alaska 99501
JAN 2 1979
RECEIVED
Attention:
M~nicipality of Anchorage Platting Board
c/o Don Alspach
Subject: S-4935 Brandee Subdivision
'~-0-~-V~. No. 11220
Gentlemen:
The preliminary plat of Brandee Subdivision (S-4935) was
heard at the Platting Board Meeting of November 1, 1978 at
which time it was returned to the petitioner to resolve
several concerns and issues expressed during the public
hearing.
The following co~nents will hopefully resolve these concerns.
e
DRAINAGE - There is a small drainage way that traverses
the property in a northwesterly direction. This has
been resolved,with the Public Works Department as shown
on the preliminary plat. The owner will dedicate a
20 ft. wide drainage easement along the south boundary
of Lot 4 and a 20 ft. wide drainage easement centered
on the thread of the drainage. This solution will
allow the easement to follow the drainage if it moves
or is moved in the future without the necessity of
vacating and rededicating the easement. This also
allows flexibility in future development of Tract A.
LIMITED ACCESS TO THE OLD GLENN HIGHWAY - This is to be
controlled as noted on the preliminary plat. Lots 1 & 2
will have a common 30 ft. wide driveway, Lots 3 & 4 will
have a common 30 ft. wide driveway and Lot 1 will have a
driveway or driveways necessary to serve the existing
car wash. This additional access will be resolved
Platting Board
December 1,. 1978
Page 2
with the State Department of Transportation at the time
the Old Glenn Highway is upgraded and curbs and gutters
are constructed.
SCREENING BETWEEN'RESIDENTIAL & COMMERCIAL USES - This
has been added to the preliminary plat.
R.O.W. FOR RIDDEL STREET - Riddel Street will be dedi-
cated as shown on the preliminary plat to provide
access and a turnaround for the three lots in Hendrickson
Subdivision off Iris Street. In response to the staff's
co~ent that they cannot support the plat when the
residential traffic of this subdivision would rely
on other streets for access we would like to' offer the
following:
There are four existing streets off the Old Glenn
Highway in the immediate vicinity of what would be
called Riddel Street. Three of these are constructed.
Mercy Drive 250 ft. S. of Riddel Street
Eleonora 500 ft. S. of Riddel Street
Rachel 350 ft. N. of Riddel Street (not constructed)
Unnamed street 700 ft. N. of Riddel Street (This
road crosses State land and connects to Iris
Street. It is used by several businesses
including the State of Alaska Highway Main-
tainance Department.)
The attached Opinion of Counsel addresses the legality
of right-of-way for the existing trail which traverses
between the Old Glenn Highway and Riddel Street. It
is intended as clarification for the attached Certificate
to Plat prepared by Safeco Title Agency, Inc. The legal
Opinion states there is no right-of-way existing for
this trail.
If there are any questions or you would like additional infor-
mation, please do not hesitate to give us a call. Hopefully
we will be able to answer all the questions at the Platting
Board meeting, but sometimes when a question is of a nature
that requires r~search we may not be able to provide the
answer at the meeting.
Very truly yours,
DICKINSON-OSWALD-WALCH-LEE,
ENGINEERS
Robert P. Grier
MEMBERS OF THE FIRM:
EDGAR PAUL E~OYKO
TERRY C. AGLIETTI
RICHARD D. PENNINGTON
RONALD AD OFF-RET
PAUL L. DAVIS
LAWRENCE W. ERWIN
A,~SOClATES:
MITCHEL ...I. SCHAPIRA
MICHAEL W. SE. WRIGHT
..JOHN W. SIVERTSEN, JR.
ELIZABETH I..JOHNSON
LAW OFFICES OF'
ANCHORAGE, ALASKA 99501
AREA 907/272- c~46,~,·
November 29, 1978
AFFILIATE OFFICE
MILLER, BOYKO & BELL
SECURITY PACIFIC PLAZA, SUITE 1324
SAN DIEGO, CALIFORNIA 92101
AREA 714/:~3;2'62r'4
Municipality Of Anchorage
Platting Board
3500 Tudor Road
Anchorage, Alaska 99504
c/o Dow Engineers
Re: Opinion of Counsel as to'Status of Title
Gentlemen:
We have been asked by Devon A. Walker to render an
opinion as to the status of title to certain real property
located in the Eagle River area, and more particularly
described as follows:
Ail that portion of the North one-half
(N1/2) of Government Lot Four (4),
Section One (1), Township 14 North,
Range 2 West, lying West the Old Glenn
Highway excepting therefrom Henry D.
Hett Homestead Subdivision and excepting
Hendrickson Subdivision and excepting
that portion set forth in Warranty
Deed, Recorded July 12, 1978, in Book
314, at Page 73, and except that portion
set forth in Warranty Deed Recorded
July 12, 1978, in Book 314, at Page 71.
This is of course, the same real property described as
Parcel 2 in Safeco Title Agency Inc.'s Certificate of Plat
dated August 29, 1978, Safeco's number 8934. Title to
this property as of 5:00 o'clock p.m. Monday, November 27,
1978, is vested in Devon A. Walker, a married man. Aside
from those exceptions of record which would of course, include
Municipality of Anchorage
November 29, 1978 - Page 2.
Re: Devon Walker
taxes and assessments, if any, due the Municipality and the
various easements of record or utilities and access and aside
from those mortgages or deeds of trust which affect the property,
it is not encumbrant.
It is our understanding that the purpose of this letter
of opinion is to clarify the existance or nonexistance of a
highway right-of-way basically going down the center of the
property traveling in a generally easterly to westerly fashion.
While it is true that there is apparently an old trail physically
in existance on the land in question, the trail does not
Constitute a right-of-way by prescription, dedication or
otherwise. Our examination of various plats and records has
led us to conclude that all Rarcels lying immediately adjacent
to the subject property have independent dedicated access, and
that therefor in our opinion the property is thusly unincumbrant.
In the event you have questions regarding the rationale
behind this opinion, we would, of course be happy to communite
our thinking to you and.thus, remain
Very truly yours,
EDGAR PAUL BOYKO & ASSOCIATES, P.C.
vg
III'
SAFECO TITLE AGENCY, ,NC.
3201 "C" STREET, SUITE 101
ANCHORAGE, ALASKA 99503
TELEPHONE (907) 276-6321
SUPPLEMENTAL TITLE REPORT
Aa E;NT FOR
SAFE;CO TITLE; INSURANCE; COMPANY
TO:
Dowl Engineers
4040 B Street
Anchorage, Alaska
Attn: Jo Anne
There has been no change in
October 16 , 19
EXCEPT as shown below:
the title to the property
78 , at 8:00 A. M.,
Our Order No. 8934
Your No.
(Mortgagor)
(Purchaser)
covered by our preliminary report since
[] DEED
GRANTOR:
GRANTEE:
RECORDED:
[] DEED OF TRUST
DATED:
TRUSTOR:
TRUSTEE:
BENEFICIARY:
ORIGINAL AMOUNT:
RECORDED:
[] ASSIGNMENT OF DEED OF TRUST
ASSIGNOR:
ASSIGNEE:
RECORDED:
OTHER
Please add as exception no. 12 to your report:
A check of our title plant reveals no dedicated roads of record;
However, we have actual knowledge of the existance of a road across
subject property which may either be a private road or a public
road. An examination of the Departn~nt of Highway records should
be made as this cc~pany cannot guarantee the status of the road.
Dated as of the .
16th October 78 8 '.DO a.m.
day of , 19 .... at
SAFECO TITLE AGENCY, INC.
4040 "B" ST R E ET
ANCHORAGE, ALASKA 99503
(907) 278-1551
,September 5, 1978
W.O. #D11220
Mr. Dee Walker and
Mr. Joe Sesto
SRA Box 290W
Eagle River, AK 99577
Subject:
Subsurface Investigation for Suitability of
On-Si~e Sewage Disposal Systems for
,~~'i ~d Sesto Subdivision
L~e~'wi~hin'the ~ 1/4, Section 1 and the
NE 1/4, Section 2, T.14N., R.2W., Seward
Meridian, Alaska
Gentlemen:
As requested on August 11, 15, 16, and 23, 1978 a subsurface
investigation was performed on the above two referenced
subdivisions. The data from that investigation is presented
in the following format:
Conclusions
Discussions
Test Hole Locations, Brandee Subd.
Test Hole Locations, Sesto Subdivision
Test Hole Logs
Grain Size Distribution Curves
Standard Explanatory Information
Figure 1
Figure 2
Table A
Sheets 1-4
Sheets 5-6
CONCLUSIONS
It should be possible to construct on-site sewage
disposal systems on all of the lots within Brandee
Subdivision and Sesto Subdivision in conformance with
State of Alaska and Municipality of Anchorage regulations.
No high ground water or bedrock was encountered on the
site.
The site generally consisted of a thin cap of organic
overburden and topsoil with clean to somewhat Silty.
Sandy Gravels and Gravels below that. Drilling was
difficult because of the amount of boulders and cobbles
present. This was the reason for terminating some of
the holes shallower than 16'.
$496 OCT 0 4 19713
Mr. Dee Walker ~
Mr. Joe Sesto
September 5, 1978
Page 2
Following are the design percolation rates for all lots
within the subdivision.
Lot
Lot 1, Brandee Subd.
Lot 2, Brandee Subd.
Lot 3, Brandee Subd.
Tract A, Brandee Subd.
Tract A, Sesto Subd.
Tract B, Sesto Subd.
Tract C, Sesto Subd.
Tract D, Sesto Subd.
Percolation Rating
2.0 - 8.0' minutes/inch
estimated. No test hole
placed on this lot.
2.0 minutes/inch
8.0 minutes/inch
13.3 minutes/inch for TH#3
2.5 minutes/inch for TH#4
1.2 minutes/inch for TH#5
2.0 minutes/inch
8.0 minutes/inch
10.0 minutes/inch
13.3 minutes/inch
DISCUSSION
The test holes were placed using a Mobile Drill B-50 drill
rig owned and operated by Denali Drilling, Inc. The test
holes were logged and the drilling supervised by Mr. Tom
Sexton, staff geologist with Alaska Testlab.
The holes were drilled using continuous, solid flight auger,
with samples being taken at regular intervals directly off
the drill bit as it was raised to the surface. Each sample
was placed in a sealed plastic bag and transported to the
laboratory where its natural moisture content and dry strength
were determined. Samples of similar color, texture, grain
size distribution were given an arbitrary group designation.
The laboratory analysis was then performed on a composite
sample from the group rather than on individual samples.
A total of four distinct soil groups were encountered and
are described below:
Group A
is a brown Gravel that is non-frost susceptible,
being rated NFS. Its unified classification is GP
and its gradation is shown on Sheet 1. The per-
meability of this soil should be excellent.
Mr. Dee Walker ~
Mr. Joe Sesto
September 5, 1978
Page 3
Group B
is a brown Silty Gravelly Sand that is moderately
frost susceptible, being rated F-2. Its unified
classification is SM and its gradation is shown on
Sheet 2. The permeability of this material should
be good to fair.
Group C
is a brown Sandy Silt that is highly frost susceptible,
being rated F-4. Its unified classification is ML
and its gradation is shown on Sheet 3. This
material is not very permeable, but it was found
only at a shallow depth. It should be possible to
place all systems below this layer.
Group D
is a brown Silty Sandy Gravel that is moderately
frost susceptible, being rated F-1. Its unified
classification is GM and its gradation is shown on
Sheet 4. The permeability of this material should
be good to fair.
After all holes were drilled, it was attempted to case each
hole with slotted, 3/4" PVC pipe. This pipe was used as
casing to run the percolation tests. Because of the highly
cohesionless nature of most of the soils, it was impossible
to insert the pipe in test holes #1, #2, and #9. Each of
the remaining holes was then saturated with water and left
to stand overnight. Then the test holes were refilled with
water the next day. The rate at which the water fell in the
pipe was then measured at 10 minute intervals for a period
of one hour. The percolation rate was computed on the basis
of the lowest fall of the water during any 10 minute interval
of the test.
Though no actual percolation test was run in test holes #1,
#2, and #9, we feel the values listed under Item %4 of the
Conclusions are good estimates though probably a little
conservative. The values were arrived at by reviewing' the
visual classification of the soils, the grain size distribution
curves and percolation rates in similar soils on the site.
We hope that this is sufficient for your present needs. If
we can offer any clarification with regard to this report,
please do not hesitate to contact us.
Very sincerely,
ALASKA TESTLAB
Melvin R. Nichols, P.E.
Laboratory Manager
MRN:rb
Enclosures
0
Test Hole #1
Table A
WO #D11220
Logged By-~ Tom Sexton
Date: August 11, 1978
D~pth in Feet
From To
0.0' - 7.0'
7.0' - 20.0'
Soil Description
NFS, tan Gravel, GP, dry, many cobbles,
occasional boulders, particles to 24",
Group A.
F-2, brown Silty Gravelly Sand, SM, damp,
medium denslt~y, particles to 1" Group B
Bottom of Test Hole:
20.0' Remarks:
Would not stand open
to run percolation test.
Frost Line:
Free Water Level:
None Observed
None Observed
Sample Depth
I 3.0'- 5.0'
2 8.0'-10.0'
3 13.0'-15.0'
Type of Dry
M% Sample Strength Group Unified
3.3 G N A GP
4.1 G N B SM
5.4 G N B SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=~edium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #2
Table A
WO #Dl1220
Logged By~ Tom Sexton
Date: August 15, 1978
Depth in Feet
From To
0.0' - 16.0'
Soil Description
NFS, brown or tank Gravel, GP, dry to damp,
many boulders, Group A.
Bottom of Test Hole:
16.0' Remarks:
Would not stand open
to run percolation test.
Frost Line:
Free Water Level:
None Observed
None Observed
Test Hole 93
Table A
WO #Dl1220
Logged By: Tom Sexton
Date: August 15, 1978
Depth in Feet
From To
0.0' - 1.0'
1.0' - 6.0'
6.0' '15.0'
Soil Description
Organic overburden
F-4, brown Sandy Silt, ~, damp to wet,
cobbles at 6' Group C
F-l, brown Silty ~ Grave_l, GM, damp to
wet, partic~-~ To 1'~, Group D.
Bottom of Test Hole:
Frost Line:
Free Water Level:
16.0'
None Observed
None Observed
Sample Depth M__%
1 5.0' 22.9
2 8.0'-10.0' 12.5
Type of Dry
Sampl9 Strength Group Unified
G M-H C ML
G L D GM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, ~=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #4
Table A
WO #Dl1220
Logged By: Tom Sexton
Date: August 15, 1978
pepth in Feet
From To
0.0' - 1.0'
1.0' - 16.0'
Soil Description
Topsoil
F-l, brown Silty Sandy Gravel, GM, damp to
wet, particles to 1", Group D.
Bottom of Test Hole:
Frost Line:
Free Water Level:
16.0'
None Observed
None Observed
Sample Depth
1 5.0'
2 10.0'
3 15.0'
Type of Dry
Sample Strength Group Unified
7.2 G N D GM
9.6 G N D GM
9.9 G N D GM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #5
Table A
WO #Dl1220
Logged By: Tom Sexton
Date: August 16, 1978
Depth in Feet
From To
0.0' - 2.5'
2.5' - 4.0'
4.0' - 13.0'
Soil Description
Organic overburden.
F-4, brown Sandy Silt, ML, wet, Group C.
F-l, brown Silty Bandy Gravel, GM, damp to
wet, particles to 1'''~', Group D.
Bottom of Test Hole:
Frost Line:
Free Water Level:
13.0'
None Observed
None Observed
Sample Depth M%
1 4.0'- 5.0' 8.7
2 9.0'-10.0' 8.2
Type of Dry
Sample Strength Group Unified
G N-L D GM
G N D GM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole 96
Depth in Feet
From To
0.0' - 1.5'
1.5' - 2.5'
2.5' - 15.0'
Table A
WO #Dl1220
Logged By: Tom Sexton
Date~ August 16, 1978
Soil Description
Organic overburden.
F-4, brown Sandy Silt, ~L.
F-l, brown Silty Sgndy Gravel~ GM, damp,
Group D.
Bottom of Test Hole:
Frost Line:
Free Water L~vel:
Sample Depth M%
4.0'- 5.0' 6.1
8.0'-10.0' 15.3
13.0'-15.0' 5.7
15.0'
Non~ Observed
None Observed
Type of Dry
Sample Strength Group Unified
G N D GM
G L D GM
G N D GM
Remarks:
am
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #7
Table A
WO #Dl1220
Logged By~ Tom Sexton
Date: August 16, 1978
9~pth.in Feet
From To
0.0' - 1.5'
1.5' - 4.0'
4.0'-- 15.0'
Soil Description
Organic overburden.
F-4, brown Silt, ~, wet to saturated, soft.
F-l/F-3, brown Silty Gravel, GM, with trace
of sand, wet, cobbles.
Bottom of Test Hole:
Frost Line:
Free Water Level:
15.0'
NoMe Observed
None Observed
Sample Depth M%
I 8.0'-10.0' 19.4
Type of Dry
Sample Strength ~roup Unified
G L - GM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #8
Table A
WO #Dl1220
Logged By: Tom Sexton
Date: August 23, 1978
Depth in Feet
From To
0.0' - 2.5'
2.5' - 15.0'
Soil Description
Organic overburden
F-l, brown Silty Sandy Gravel, GM, cobbles,
hand drilling, damp, Group D.
Bottom of Test Hole:
Frost Line:
Free Water Level:
15.0'
None Observed
None Observed
Sample Depth M%
1
2
3
4.0'- 5.0' 5.4
9.0'-10.0' 7.5
13.0'-15.0' 10.2
Type of Dry
Sample Strength Group Unified
G N D C~M
G N D GM
G N D GM
Remarks:
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, ~=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole 99
Table A
W0 %D11220
Logged By: Tom Sexton
Date~ August 23, 1978
~.pth in Feet
From To
0.0' - 2.5'
2.5' - 3.5'
3.5' - 13.0'
Soil Description
Organic overburden.
F-4, brown ~andy Silt, ML, wet, soft.
F-l, brown Silty Sandy Gravel, GM, damp,
hard drilling, Group D.
Bottom of Test Hole:
Frost Line:
Free Water Le%el:
13.0'
None Observed
None Observed
Sample Depth M..~
4.0'- 5.0' 6.3
8.0'-10.0' 10.8
Type of Dry
Sample Strength Group Unified
G N D GM
G N D GM
Remarks: 1.
3.
4.
5.
6.
Type of sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, ~=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
~o $ ~ o ~o
All
$ ~ ~ 0
A~4t)I]M A~I I~]Nl.,IAN]:)
o
~Test Hole Log - Description Guide
The soil descriptions shown on the logs are the best estimate of the soil's
characteristics at thc time of field examination and as such do not achieve the
precision of a laboratory testing procedure. If the log includes soils samples,
those samples receive an independent textural classification in the laboratory
to verify the field exanfination.
The logs often include the following items:
Depth Interval - usually shown to 0.1 foot, within that zone no
Significant change in soil type was observed through drill action, direct
observation or sampling.
Frost Classification - NFS, Fl, F2, F3, F4, see "Soil Classification
Chart"
Texture of Soil · An engineering classification of the soils by particle
size and proportion, see "Soil Classification Chart", note the
proportions are approximate and modifications to the soil group due to
stratificatim~, inclusions and changes in properties are included.
Moisture Content this is a qualitative measure:
dry, no or little apparent surface moisture,
damp, moisture forms portion of color, less than plastic limit,
wet, no frec water, often soft, if cohesive soil,
saturated, free water may be squeezed out, if a free draining soil;
dilatent at natural moisture content, if a non-plastic silt or fine
sand. (Thc moisture content is further defined by reference to PI,
LW, NP, M% or dilatency.)
Density ~ refers to more.or.less non-cohcsiw soils, such as sand gravel
mixtmes with or without a fine fraction, derived from drilling action
and/or sample data', usually described as: very loose, loose, medium
dense, very dense. General intent' is to portray earthwork
characteristics.
Stiffness -- refers to more-or-less cohesive soils and fine grained silts of
~silt groups. Derived from drill action and/or sample data. Very
soft, soft, stiff, very stiff and hard are commonly used terms.
Particle size -- The largest particle recovered by the split spoon is
'1-318", Shelby tube 3", auger flights (minute-man) 2", Auger flights
(B-50 hollow stem) 6"-8". Larger particles are described indirectly by
action of the drilling and are referred to as cobbles, 3" to 8", or
boulders 8"+. Therefore whcu reviewing the gradation sheets, if any,
the description on the hole log must be considered for an'indicati6n of
larger particles.
Unified Soil Classification - This is a two letter code. See Unified
Classification sheet fur i'~her definition. In some'cases AASHO and/or
FAA soil classifications may be shown as well as the unified.
Atterberg Limits -- useful for fine grained and other plastic soils.
PI; natural moisture content believed to be less than plastic limit
PI+; natural moisture content believed to be between plastic and liquid
l-~-mits
L.._._~; natural moisture content believed to be greater than liquid limit
NP; non-plastic, useful as a modifying description of some silty
~t~rials.
Dilatency - is thc ability of water to migrate to the surface of a
saturated or nearly saturated soil sample when vibrated or johed .- used
as an aid to deterntine if a fine grained soil is a slightly or non.plastic
silt or a volcanic ash.
Rock flour - finely ground soil that is not plastic but otherwise appears
~ clayey silt.
Organic Content - usually described as Peat, PT. sometimes includes
discrete particle~ such as wood, coal, etc. as a modifier to an inorganic
soil. Quantity described as; trace, or an estimate of volume, or, in case
of all organic, - as Peat. This may include tundra, muskeg and bag
material.
Muck - a modifier used to describe very soft, semi-organic deposas
usu-'~G'~ly occuring below a peat deposit.
Amorphus peat -- organic particles nearly or fully disintegrated.
Fibrous Peat - organic particles more-or-less intact.
Bottom of Testhole - includes last sample interval.
Frost Line - seasonal frost depth as described by drilling action and)or
samples at the time of drilling.
Frozen Ground - other than frost line, described by samples, usually
includes description of ice content, often will include modified Unified
Classification for frozen soils - this is a special case related to
permafrost studies.
Free Wawr Level - The free water level noted during drilling. This is
not necessarily the static water table at the time of drilling or at other
seasons. Static water table determination in other than very permeable
soils requires observation wells or piezometer installations, nsed only m
special cases.
Blow/6." -. Thc number of blows of a 1 40 weight free falling 30" to
advance a 2" split spoon 6"; the number of blows for a 12" advance is,
by definition, the standard penetration.
M% - natural moisture content of the soil sample, usually not
p-'~'rformed on clean sa:Ids or gravels below the water table.
Type of Sample -
SP, refers to 2" split spoon driven into the soil by 140 pound
weight, a disturbed sample,
S, thin wall tube, "Shelby" used to obtain undisturbed samples
of fine grained soil,
G, "grab" disturbed sample flora auger flights or wall of trench,
C, cut sample, undisturbed sample from wall of trench.
Dry Strength - a useful indicator of a soil's clayey fraction, N--None,
L=Low, M=Medium, H=High
- The samples are placed into apparently similar groups based
or and texture and are arbitrarily assigned a group h:tter. Further
disturbed tests including Atterberg Limits, grain size, moisture-density
relationship, crc, may be performed on the group ;,nd are assumed to
reflect the general distrubed characteristics of the soils assigned to the
group, This is an important phase of the soil analysis and is uscd to
standardize the various qualitative determinations and to reduce tile
number of quantitative tests necessary to describe the soil mass.
SOIL CLASSIFICATION CHART
30% GRAVEL
,t' C ¢'
CLAYEY
OR
SILTY
SAND
CLAYEY
SILTY
RAVELLY SAN SANDY GRAVEL
GRAVEL
GRAVELLY SAND SANDY }RAVEL GRAVEL
0 ! 0 20 30 40 50 60 70 80 90 100
GRAVEL (+#4 SCREEN) % BY WEIGHT
NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 0.02 mm.
GROUPS OF FROST-SUSCEPTIBLE SOILS:
F1 GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN 0.02 mm,
F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm.
F3 a. GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN 0.02 mm. AND SANDY SOILS
(EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN 15% FINER THAN 0.02 mm.
b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS.
F4 a. ALL SILTS INCLUDING SANDY SILTS.
b. FINE SILTY SANDS CONTAINING MORE THAN 15% FINER THAN 0.02 mm.
c. LEAN CLAYS WITH PLASTICITY INDEXES OF LESS THAN ]2.
d. VARVED CLAYS.