HomeMy WebLinkAboutDRAKE Block 4 LTS 1A & 1B S12457Onsite File
January 28, 2020
Municipality of Anchorage
Building Safety Division
On Site Water and Wastewater Program
4700 Elmore Street
Anchorage, AK 99507
Attention: Debbie Wockenfuss
Subject: Drake Subdivision, Block 4, Lot 1
Proposed Drake Subdivision, Lots lA and 1B
Septic System Feasibility Study
Water Availability Study
Dear Debbie:
The owner of the parcel identified as Drake Subdivision, Block 4, Lot 1 has submitted a
petition to subdivide the property into two lots forming the new Drake Subdivision, Lot IA
and 1B. We have completed a study of the proposed lots and have determined that each will
support an onsite septic system. Three individual absorption systems have been designed
for each lot. These locations will be delineated on the final plat. Each lot will be served by
a private well. A water availability study was completed and submitted to you in December
of 2018. No wells in the area are in conflict with the locations of the proposed septic systems.
The parcel is virtually flat and the areas proposed for septic systems slope slightly to the
west at grades of 0% to 2%. There are no areas within 50' of the proposed septic systems
which exceed slopes of 25%. Lot sizes exceed 40,000 S.F. as shown on the attached site plan
which also identifies the areas specified for septic systems and private wells. Ground surface
contours are shown on the site plan indicating the grade and direction of flow. Storm water
drainage will not impact these septic systems and all proposed trenches will be constructed
parallel to the ground slope as much as possible.
The absorption trenches will be constructed utilizing engineered receiving soils in
conformance with Section 15.65.210D3c and the attached design documents. The
absorption trenches will be utilized in association with a Category III Nitrate Reducing
Treatment Systems. The system will be 50' from the well on this and adjacent lots. The
percolation rate for the accepting soils at the proposed locations on each lot was estimated
based on the silt content of the material found at that location. The silt content at the location
on Lot 1B was determined to be 31.8% with 56.9% sand and 11.3% gravel. The silt content
on Lot IA was similar with 33.5% with 41.5% sand and 25% gravel. This resulted in a USCS
Classification of SM or silty sand in each test hole. Past experience has shown this material
to absorb water at between 30 and 60 minutes per inch and often faster depending on in situ
density.
Test holes were placed on the proposed lots in October of 2018 and September of 2019. The
test holes were excavated from 14' to 14.5' Monitoring tubes were placed in the test holes
and groundwater checked periodically with the final reading on October 18, 2019.
Groundwater has been noted from 13' in late fall to 2' below the surface in the spring
indicating the water is being absorbed and leaving the area.
Soils were uniform in both test holes consisting of over burden to F underlain by organic
laden fill and peat to 8' below the surface. Percolation tests could not be performed on the
underlying silty sand, but samples were obtained and analyzed at the laboratory. Gradation
results are attached.
Our field studies, research, and water monitoring completed to date indicate that both lots of
the proposed subdivision are capable of supporting new onsite septic systems, but only at
the locations shown and to the design completed and attached. Homes on each lot will be
limited to three bedrooms. Notes for the final plat are as follows:
1. Category III Nitrate Reducing Advanced Wastewater Treatment Systems approved
by the Municipality of Anchorage are required on Lots 1 and 1B.
2. Houses proposed for Lots IA and 1B are limited to a maximum of three (3)
bedrooms.
3. Alternate locations for wastewater disposal reserved areas may be used if approved
by the Municipality. In which case, the locations shown hereon shall move to the
new locations and an amended plat shall be filed with the State Recorder's Office
detailing the changes.
Completed designs are included for each lot along with all backup documentation.
Additionally, we located well logs for two of the three lots directly adjacent to the new
subdivision on the east and south boundaries. These are the nearest wells to the subdivision
and are representative of the wells that would be constructed on the proposed lots. The well
logs are described in the following table.
Property Legal . Well Depth (Ft) Flow Rate (GPM)
Drake, Block 4 Lot 7 128 15
Drake, Block 4 Lot 8A 152 20
The properties to the west are serviced by the AWWU water system. It is clear from this
study that the aquifer in the area has the capacity to support new wells on the two lots in the
proposed subdivision. New wells will likely be drilled to 120' to 160' deep and will produce
between 5 and 10 Gallons per Minute. The wells will not affect the operation or output of
the existing wells in the area. A study was completed of the records pertaining to the wells
within 250' of the subdivision limits to determine nitrate content of the water. No records
were found and no water samples taken.
Based on our field studies, research and water monitoring completed to date it is clear that
both lots of the proposed subdivision are capable of supporting new wells and onsite septic
systems. Please review the attached data and advise if further information is required.
Sincerely,
Michael E. Anderson, P.E.
Attachments
I
DRAKE SUBDIVISION,•LOT 1
100' PROTECTIVE RADIUS FRO HE WELL
ON LOT 8, BLOCK 1, DRAKE SU DIVISION.
\ LOCATION IS NOT EMCT, BU RADIUS HAS
\ NO IMPACT ON PR )SED PTIC SYSTEM
RG)AS ER)AEE \ LOCATIONS.
2�1/OPOSED OT 1A - _
NOTE: 45' LONG x 5' WIDE x.5'
HOME LIMITED 0 THREE DROOMS. EFFECTIVE DEPTH ABSOR TION
TRENCH W/ENGINEERED
RECEICVING SOILS.
THNW
PR POSED WE \
w O' RADIUS \
Y PROP SED LOT LIN
I \ ®
\ // I
— / FCO
\ PROPOSED LI/
\ w/50' RADIUS
IMITS OF FILL
3:1 SLOPES
HSW
10-G ADVANTEX TANK W/ AX20 POD
IMP VAULT OR SIMILAR CATEGORY III
SYSTEM. TANK MUST BE ANCHORED
BOUYANCY. SEE MANUFACTURER'S
RECOMMENDATIONS.
LIMITS OF FILL
THNE
PROPOSED LOT 1B
45' LONG x 5' WIDE x
EFFECTIVE DEPTH A
TRENCH w/ENGINEE
RECEICVING SOILS.
\\\�
MT
ALTER�ATE
SITE
NOT 3:1 SLOPES
HOME IMIT D TO THREE BEDROOMS.
�— — — — — — — — — — — — — — — — — — — — — —
O I
ENGINEERING
N OTE:
0
NO SLOPES >25% WITHIN 50-
®®�®OF<���� PROPOSED SEPTIC SYSTEM OR SURFACE WATER WITHIN 100' OF THE LEGEND
��`PC°•••°° °.• °°°'9°� CO - CLEANOUT
°° 49th �`.'®®� ALL WELLS ON SURROUNDING LOTS WITH IMPACTS TO THIS 2C0 -DOUBLE CLEANOUT
• •° ° •• ••• •;i°••••ig, PROPERTY ARE SHOWN. NO CONFLICTS WITH WELLS OR SEPTIC FCO -FOUNDATION CLEANOUT
6.1•E••ANDERSON "'��•� SYSTEMS. FS - FLOW SPLITTER VALVE
MICHAEL .
No. CE -4387 $® 0 50 100 MH -MANHOLE
A 1/28/20.•'���'� FEET MT - MONITORING TUBE
0®Fa pRa..ESS...* SV - SEPTIC VENT
® 1"=50' TH - TEST HOLE
DRAKE, BLOCK 4, LOT 1 - LOT A
DESIGN FACTORS: SYSTEM REQUIREMENTS:
450 GPD PEAK FLOW 5' WIDE TRENCH SYSTEM w/ENGINEERED
PERK RATE: 60 MIN/IN RECEIVING SOILS
APPLICATION RATE: 2 GPD/SF 1,500 -GAL FAP ADVANTEX TREATMENT SYSTEM
w/AX-20 FILTER POD & PUMP VAULT
450 GPD / 2 GPD/SF /5' WIDE = 45 LF TRENCH REQUIRED (45 LF SPECIFIED)
BOTTOM OF TRENCH: 0.0' BELOW GRADE
FLOW LINE ELEVATION: 0'6" ABOVE GRADE
TOP OF TRENCH: 3.0' ABOVE GRADE
4" TOPSOIL & SEED
:Iy1yly�
GROUNDXISTING -
5'6"
2" DIRECT BURY INSULATION
�5'�
1.25" PERFORATED PVC (HOLES DOWN)
15-3/16" DIAMETER HOLES @ 2' SPACING
4" TOPSOIL & SEED
3:1 SLOPE
EXISTING GROUND
DRAINFIELD ROCK
ENGINEERED RECEIVING SOIL
TYPE IIA CLASSIFIED FILL
TYPICAL TRENCH SECTION
(NO SCALE)
NOTES:
1. GRADE AREA OVER TRENCH TO DRAIN AWAY
2. PROVIDE T OF COVER OVER TRENCHES AND 4' OVER SEPTIC TANK, OR 2'
WITH 2" OF INSULATION
3. CHECK GROUNDWATER AT TIME OF CONSTRUCTION. IF LEVEL IS HIGHER
THAN PREVIOUSLY OBSERVED, CALL ENGINEER IMMEDIATELY
DRAKE, BLOCK 4, LOT 1 - LOT B
DESIGN FACTORS: SYSTEM REQUIREMENTS:
450 GPD PEAK FLOW 5' WIDE TRENCH SYSTEM w/ENGINEERED
PERK RATE: 60 MIN/IN RECEIVING SOILS
APPLICATION RATE: 2 GPD/SF 1,500 -GAL FAP ADVANTEX TREATMENT SYSTEM
w/AX-20 FILTER POD & PUMP VAULT
450 GPD / 2 GPD/SF /5' WIDE = 45 LF TRENCH REQUIRED (45 LF SPECIFIED)
BOTTOM OF TRENCH: 0.0' BELOW GRADE
FLOW LINE ELEVATION: 0'6" ABOVE GRADE
TOP OF TRENCH: 3.0' ABOVE GRADE
4" TOPSOIL & SEED
EXISTING GROUND
5'6"
2" DIRECT BURY INSULATION
1.25" PERFORATED PVC (HOLES DOWN)
ilK15-3/16" DIAMETER HOLES @ 2' SPACING
4" TOPSOIL & SEED
3:1 SLOPE
EXISTING GROUND
DRAINFIELD ROCK
ENGINEERED RECEIVING SOIL
TYPE IIA CLASSIFIED FILL
5'
TYPICAL TRENCH SECTION
(NO SCALE)
NOTES:
1. GRADE AREA OVER TRENCH TO DRAIN AWAY
2. PROVIDE 3' OF COVER OVER TRENCHES AND 4' OVER SEPTIC TANK, OR 2'
WITH 2" OF INSULATION ®®®
3. CHECK GROUNDWATER AT TIME OF CONSTRUCTION. IF LEVEL IS HIGHER
THAN PREVIOUSLY OBSERVED, CALL ENGINEER IMMEDIATELY
ENGIN EE R I N G!
MICHAEL E. ANDERSON
No. CE -4381 y;
12/13/19 •••�
PF
.................
SOILS LOG AND PERCOLATION TEST
E N G I N E E R I N G
LEGAL DESCRIPTION: DRAKE B4 LI - 12651 LAKE OTIS PKWY REPLAT
PERFORMED FOR: CLIENT
DATE: 10/30/2018 PROJECT No.:
PARCEL ID#: 017-462-20 TECHNICIAN: J. MILLETTE
DEPTH TEST HO�,N
(feet)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SLOPE
SM - SILTY SAND (FILL)
> e
•: f0R
229101
• =
aSM -SILTY S SAND
WAS GROUND WATER ENCOUNTERED? YES
IF YES a WHAT DEPTH? 5- L
DEPTH OF WATER AFTER MONITORING: 4'
DATE OF MONITORING: 12/6/18
E
`H
Ben'a�" Sehilfer
CE 12592�i
Professional
SITE PLAN
SEE SITE PLAN
i
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH To
WATER
(INCHES)
NET DROP
(INCHES)
TEST HOLE PRESOAKED PRIOR TO TESTING:
PERCOLATION RATE: (MIN/INCH) PERC. HOLE DIA. (INCHES)
TEST RUN BETWEEN: FT. and FT.
COMMENTS: UNABLE TO PERK UNDISTURBED SOILS DUE TO DEPTH AND GROUNDWATER
[_am le Ta len 7°��Urf C�.
NORTHERN GEOTECHNICAL ENGINEERING, INC.,1 TERRA FIRMA TESTING
PROJECT CLIENT:
Forge Engineering
PROJECT NAME:
Drake North Lot
PROJECT NO.:
5248-19
SAMPLE LOC.:
NE Test Hole
NUMBER/ DEPTH:
SA -I
DESCRIPTION:
Silt with sand
DATE RECEIVED:
1/8/2019
TESTED BY:
JA
REVIEWED BY:
RJPC
100
90
80
70
60
50
w� 40
30
w 20
10
0
145
140
0
,5135
z~
z 130
w
Q
125
120
115
% GRAVEL 5.1
% SAND 11.5
% SILT/CLAY 83.4
% Iv1OIST. CONTENT 17.5
USCS ML
USACOE FC N/A
% PASS. 0.02 mm N/A
% PASS. 0.002 mm N/A
UNIFORMITY COEFFICIENT (C„)
UNKNOWN
COEFFICIENT OF GRADATION (Ce)
UNKNOWN
ASTM D1557 (uncorrected)
N/A
ASTM D4718 (corrected)
N/A
OPTIMUM MOIST. CONTENT. (corrected} N/A
1'AKI'ICLE SIZE ANALYSIS ASTIM D422 / C136
U.S. SIEVE orp..HQm nurem I U.S. SEVF.11MMERS I uYn9rr,cicc
100 10 GRAIN SIZE (mm) 1 0.1 0.01 0.001
GRANtEL SAND i
COBBLESSILT' or CLAP
Coarse
Fine Coarse Medium Fine
MOISTURE -DENSITY RELATIONSHIP ASTM D 1557
0 2 4 6 8 10 12 14 16
MOISTURE CONTENT (%)
SIEVE ANALYSIS RESULT
SIEVE
SIZE (mm)
SIEVE
SIZE (U.S.)
TOTAL% SPECIFICATION
PASSING (% PASSING)
N/A
DEGRADATION
152.40
6„
PLASTICITY INDEX
76.20
3"
N/A
38.10
1.5"
100
19.00
3/4"
97
12.70
I/2"
97
9.50
3/8"
96
4.75
#4
95
2.00
410
94
0.85
#20
94
0.43
#40,
93
0.25
#60
91
0.15
#100
89
0.075
#200
83.5
HYDROMETER RESULT
ELAPSED DIAMETER TOTAL %
TIME(MIN) (mm) PASSING
0
0.s
1
2
4
8
15
30
60
250
1440
HYDRAULIC COND.
(ASTM D2434)
N/A
DEGRADATION
(ATM T-313)
N/A
PLASTICITY INDEX
ASTM 4318
N/A
The testing services reported herein have been performed to recognized industry standards, unless otherwise noted. No other warranty is made. Should engineering
interpretation or opinion be required, NGE-TFT will provide upon written request.
11301 Olive Lane - Anchorage, Alaska 99515 - Phone: 907-344-5934 . Fax: 907-344-5993 • nvwmnge-o.com
DEPTH
(feet)
1-
2-
3-
4-
5-
6-
7-
8-
9-
10-
ll-
12-
13-
14-
15-
16-
17-
18-
19-
20-
SOILS LOG AND PERCOLATION TEST
LEGAL DESCRIPTION: DRAKE 134 LI - 12651 LAKE OTIS PKWY REPLAT
PERFORMED FOR: CLIENT
DATE: 10/30/2018 PROJECT No.:
PARCEL ID#: 017-462-20 TECHNICIAN: J. WILLIAMS
TEST HOLE: NW
V OB
i
SM - SILTY SAND (FILL)
PT - WOOD CHIPS, ORGANICS
PT - PEAT, ORGANIC
SLOPE
49 .•` 2
Ben"a7ifin Schiller
CE 12592.
Professional Engineers Stamp:
SITE PLAN
SEE SITE PLAN
x
v
DATE
WAS GROUND WATER ENCOUNTERED?
YES
NET TIME
(MINUTES)
IF YES ct WHAT DEPTH?
5 L
TEST HOLE PRESOAKED PRIOR TO TESTING:
DEPTH OF WATER AFTER MONITORING:
3' 0
DATE OF MONITORING:
12/6/18 P
E
�•"
SM - SILTY SAND
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH To
WATER
(INCHES)
NET DROP
(INCHES)
TEST HOLE PRESOAKED PRIOR TO TESTING:
PERCOLATION RATE: (MIN/INCH) PERC. HOLE DIA. (INCHES)
TEST RUN BETWEEN: FT. and FT.
COMMENTS: UNABLE TO PERK UNDISTURBED SOILS DUE TO DEPTH AND GROUNDWATER
DEPTH
(feet)
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SOILS LOG AND PERCOLATION TEST
E N G I N E E R I N G
LEGAL DESCRIPTION: DRAKE B4 LI - 12651 LAKE OTIS PKWY REPLAT
PERFORMED FOR: CLIENT
DATE: 9/4/19 PROJECT No.:
PARCELID#: 017-462-20 TECHNICIAN: J. WILLIAMS
TEST HOLE
1001VAPArgT[6z07�7
PT - PEAT
SAMPLE TAKEN
SM - SILTY SAND
SLOPE
WAS GROUND WATER ENCOUNTERED? YES
IF YES n WHAT DEPTH? I I ' L
DEPTH OF WATER AFTER MONITORING: 4' 0
DATE OF MONITORING: 10/18/19 P
E
SITE PLAN
SEE SITE PLAN
i
v
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH TO
WATER
(INCHES)
NET DROP
(INCHES)
TEST HOLE PRESOAKED PRIOR TO TESTING:
PERCOLATION RATE: (MIN/INCH) PERC. HOLE DIA. (INCHES)
TEST RUN BETWEEN: FT. and FT.
COMMENTS: UNABLE TO PERK UNDISTURBED SOILS DUE TO DEPTH AND GROUNDWATER
NORTHERN GEOTECHNICAL ENGINEERING, INC. / 'TERRA FIRMA "TESTING
PROJECT CLIENT:
Forge Engineering
PROJECT NAME:
Drance Block 4 Lot 1
PROJECT NO.:
5248-19
SAMPLE LOC.:
TH South
NUMBER/ DEPTH:
7.51-111
DESCRIPTION:
Silty sand `v/ gravel
DATE RECEIVED:
5/6/2019
TESTED BY:
JA
REVIEWED BY:
RJPC
% GRAVEL 25.0
% SAND 41.5
% SILT/CLAY 33.5
% MOIST. CONTENT 13.2
USCS SM
USACOE FC N/A
%PASS. 0.02 mm N/A
% PASS. 0.002 nun NIA
UNIFORMITY COEFFICIENT (C„)
UNKNOWN
COEFFICIENT OF GRADATION (Cj
UNKNOWN
ASTM D1557 (uncon•ected)
N/A
ASTM D4718 (corrected)
N/A
OPTIMUM MOIST. CONTENT. (corrected) N/A
PAK"11CLE S1ZE ANALYSIS ASTM D422 / C136
US. STEVE OPENING ITT INCHES I U.S.SIEVEIIIR.IOER$ 1 111MRMETER
6 3 1.5 314 1%2318 44 #10 920 #40 #60 #100 #200
100
90
80
70
60
50
q 40
30
20
10
0
145
140
4-?
U
135
H
z 130
125
q
120
115
�_
�a
iu�1 ,,.
l.■
�nl IN
n
misi■�
min
iuiii�i�
1 nl■
iii■�I
152.40
�101
11�
11,11.■
IE�.■
11�11��1
38.10
1 .■
11110..
11i
i
X01 al..
ml
l�
�n■
�1 C:�
n�iii�
i111.
1110
f n■
0
i°ilii■1■i
����.■
111%1.■+
�1 11.
I11�
iiCi
1111.:
I ww
�1�.L�
1'��■
11 � ■
li
fn��iii�
!t III.■�
� ■
�1�
■
■
If1111���iill®�
!1 i1H
i,ni
�
llll�
11iH
lIIH
in IN
�.■ !11
�Im"�C
U
�11�1�C �1�111.■
11 ■u1
IH
���1:
ip 1.■ 111111�i0M��
111 �
enl
mIH�I11�Iv
■
iii; ■
■■
IU IMW
■
0.85
100 10
G
COBBLES RAVEI,
1 0.1
GRAIN SIZE (mm)
SAND
0.01 0.001
SILT or CLAY
MOISTURE -DENSITY RELATIONSHIP ASTM D1557
0 2 4 6 8 10 12 14 16
MOISTURE CONTENT (%)
SIEVE ANALYSIS RESULT
SIEVE
SIZE (mm)
SIEVE
SIZE (U.S.)
TOTAL% SPECIFICATION
PASSING (% PASSING)
NIA
DEGRADATION
152.40
611
PLASTICITY INDEX
76.20
3"
NIA
38.10
1.511
100
19.00
3/411
91
12.70
1/2"
86
9.50
3/811
83
4.75
#4
75
2.00
#10
68
0.85
#20
60
0.43#40
50
0.25 1
#60
44
0.15 1
4100
39
0.075
#200
33.5
HYDROMETER RESULT
ELAPSED MWETER TOTAL%
TIME(MIN) (mm) PASSING
0.5 - ._..
1
2
4
3
15
30
60
250
1440
HYDRAULIC COND.
(ASTM D2434)
NIA
DEGRADATION
(ATM T-313)
N/A
PLASTICITY INDEX
ASTIv14318
NIA
The testing services reported herein have been perfornied to recognized industry standards, unless otherwise noted. No other warranty is made. Should engineering
interpretation or opinion be required, NGE-TF1' will provide upon written request.
11301 Olive Lane • Anchorage, Alaska 99515 • Phone: 907-344-5934 • Tax: 907-344-5993 • wi v.nge-loom
DEPTH
(feet)
1-
2-
3 —
4-
5-
6-
7-
8-
9-
10-
11-
12-
13-
14-
15-
16-
17-
18-
19-
20 -
SOILS LOG AND PERCOLATION TEST
ENGINEERING
LEGAL DESCRIPTION: DRAKE 134 LI - 12651 LAKE OTIS PKWY REPLAT
PERFORMED FOR: CLIENT
DATE: 10/30/2018 PROJECT No.:
PARCELID#: 017-462-20 TECHNICIAN: J. WILLIAMS
TEST HOLE: SE
TOB
SM - SILTY SAND (FILL)
PT/OB WOOD CHIPS, WOOD
°'•'• • SM - SILTY SAND
SLOPE
SITE PLAN
SEE SITE PLAN
DATE
READING
WAS GROUND WATER ENCOUNTERED?
YES
DEPTH To
WATER
(INCHES)
NET DROP
(INCHES)
IF YES a WHAT DEPTH?
5'
DEPTH OF WATER AFTER MONITORING:
3'
a
DATE OF MONITORING:
5/15/19 P
E
_
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH To
WATER
(INCHES)
NET DROP
(INCHES)
TEST HOLE PRESOAKED PRIOR TO TESTING:
PERCOLATION RATE: (MIN/INCH) PERC. HOLE DIA. (INCHES)
TEST RUN BETWEEN: FT. and FT.
COMMENTS: UNABLE TO PERK UNDISTURBED SOILS DUE TO DEPTH AND GROUNDWATER
Sample Taken 8' Below the Surface.
NORTHERN GEOTECHNICAL ENGINEERING, INC.,/ TERRA FIRMA TESTING
1aborafiary Testing Gealechn�cainglneerang Insrumentat�ononstraetron Manitor>ttg Services
_>r .... .r. a ...�-.w... <� .n >�r.....-.. . .•.. �? ....z3., n..F,i. .."". . >i .+_..., tii. �^a. ......u.. n...� „��. %•......{..i"s.n...—...,..x. {i'
PROJECT CLIENT:
Forge Engineering
PROJECT NAME:
Drake North Lot
PROJECT NO.:
5248-19
SAMPLE LOC.:
SE Test Hole
NUMBER/ DEPTH:
SA -2
DESCRIPTION:
Silty sand
DATE RECEIVED:
1/8/2019
TESTED BY:
3A
REVIENVFD BY:
RJPC
100
90
80
70
60
50
:2Q 40
30
20
10
0
145
140
3 135
� I30
R
125
120
115
% GRAVEL 11.3
% SAND 56.9
% SILT/CLAY 31.8
% MOIST. CONTENT 10.1
USCS
USACOE FC
% PASS. 0.02 mm
% PASS. 0.002 mm
SM
N/A
N/A
N/A
UNIFORMITY COEFFICIENT (C„)
UNI{NOWN
COEFFICIENT OF GRADATION (Ce)
UNKNOWN
ASTM D 1557 (uncorrected)
N/A
76.20
ASTM D4718 (corrected)
N/A
38.10
OPTIMUM MOIST. CONTENT. (corrected) N/A
PARTICLE SIZE ANALYSIS ASTM D422 / C 136
U.S. SIEVE OPENING IN WCHES I U.S.SMVENUMFIERS I HYDROMETER
100 10 1 0.1 0.01 0.001
GRAIN SILL (mm)
SAND
---._._G� 12A��I;1. chum
COBBLES li GRAVEL
— SILT or CLAY
Coarso Fine Coarse Medium Pine
MOISTURE -DENSITY RELATIONSHIP ASTM D1557
0 2 4 6 8 10 12 14 16
MOISTURE CONTENT (D/e)
SIEVE ANALYSIS RESULT
SIEVE
SIZE (mm)
SIEVE
SIZE (U.S.)
TOTAL% SPECIFICATION
PASSING (%PASSING)
N/A
DEGRADATION
152.40
6"
PLASTICITY INDEX
76.20
3"
N/A
38.10
1.511
19.00
3/4"
100
12.70
1/2"
98
9.50
3/8"
97
4.75
#4
89
2.00#10
76
0.85
420
65
0.43
#40
57
0.25
#60
51
0.15
#100
44
0.075
9200
31.8
HYDROMETER RESULT
FLAPSP.D DIANIFTER TOTAL%
Tam (Mll"D (rani) PASSING
0
0.5
l
2
4
8
15
30
60
250
1440
HYDRAULIC COND.
(ASTM D2434)
N/A
DEGRADATION
(ATM T-313)
N/A
PLASTICITY INDEX
N/A
ASTM 4318
The testing services reported herein have been performed to recognized industry standards, unless otherwise noted. No other warranty is made. Should engineering
interpretation or opinion be required, NGE-TFT will provide upon written request.
11301 Olive Lane • Anchorage, Alaska 99515 • Phone: 907-344-5934 • Fax: 907-344-5993 - IVIvlv.nge-o.com
DEPTH
(feet)
1-
2
3
4
J
6
7
8
9
10-
11-
12-
13-
14-
15-
16-
17-
18-
19-
20-
>A
SOILS LOG AND PERCOLATION TEST]49 TH
ENEER�NGNGII
Ben e�m Schiller
LEGAL DESCRIPTION: DRAKE B4 LI - 12651 LAKE OTIS PKWY REPEAT rj CE1_ 259 �`-
PERFORMED FOR: CLIENT � ROOFFESSSSOI
DATE: 10/30/2018 PROJECT No.:
PARCEL ID#: 017-462-20 TECHNICIAN: J. WILLIAMS Professional Engineers Stamp:
TEST HOLE: SW
SLOPE
SM - SILTY SAND (FILL)
PT - WOOD, WOOD CHIPS, PEAT
WAS GROUND WATER ENCOUNTERED? YES
IF YES a WHAT DEPTH? 5'
DEPTH OF WATER AFTER MO
DATE OF MO
SM - SILTY SAND
SI I E PLAN
SEE SITE PLAN
z
v
a
L
MONITORING: 4' 0
MONITORING: 12/6/ 18
2'- 5/17/19
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH To
WATER
(INCHES)
NET DROP
(INCHES)
TEST HOLE PRESOAKED PRIOR TO TESTING:
PERCOLATION RATE: (MIN/INCH) FERC. HOLE DIA. (INCHES)
TEST RUN BETWEEN: FT. and FT.
COMMENTS: UNABLE TO PERK UNDISTURBED SOILS DUE TO DEPTH AND GROUNDWATER
7
(is w a
tieats r CNV n,
r4 C o rM tj r' , F,
0 95 r, I
Attention- orris P. nswald
suh !q-1. -
Slock 4, Drake Sbbdivision
r
in repiv
Arri I
27.
T t
4, C a tr� Pst Lph, or FPhruAry
r C',
.1,0
on tie
Y
entire lotwbro
tO CO e in and
rr-rrlt. Thrrcfnrr
ConOillonn Still'stand as t, p,
� L n rur lett, to r�r. Terry or
I !W' 10� 1971, %, rh r., r d, V j
&hot tile soil con_
n Sul I tAble ftr on -s 'to saws r MSPOW for
,t tlit It
VIC Will
t. 0t plx�ay d 4fQBlock 4 Tvry,
rake Subdivision i!,, not sultmi),rr
fnr
suc time �Id nublic
RbIr for connection to those lots.
5hc,04 have anY further questions regarding this matter„
Rolf
Assistant Director
W,
S-2643
PLAT STATUS: Final
GREATER ANCHORAGE AREA BOROUGH
3500 Tudor Road
Anchorage, Alaska 99507
DATE: May 2, 1972
BOROUGH: CITY OF ANCHORAGE:
Platting Engineer Fire Marshal
Public Works Department Municipal Light & Power Department
Department of Environmental Quality Property Management Officer
Fire Department Public Works Department
Street Names Telephone Utility
Tax Appraisers Traffic Engineer
School. District Water Utility
OTHER:
Alaska Department of Highways GAB Telecommunications, Inca
Alaska Railroad Matanuska Electric Association
Anchorage Natural Gas Corp, Matanuska Telephone Association
Central Alaska Utilities Assistant Superintendent of Mails
Chugach Electric Association Alaska Department of Fish & Game
DESCRIPTION OF PROPERTY' Drake Subdivision, Lots 1-A and 1-B, Blk. 4
OWNER: Odin Terry
Gentlemen:
A petition has been received by the Greater Anchorage Area Borough Planning
Department for the proposedSub d;v,s�on __ of subject property for the
4ay_31, 1972 Planning Commission Meeting.
Attached is a copy of the proposed plat. Will you please submit your comments
in writing, specifying any easements or other requirements that your department
or agency may need.
If we do not hear from you by _.May 18, 19L2we will assume that you
do not wish to submit any comments.
If you have no further use for the attached print, please return it with your
comments,
Planning Department
Enclosure
DICKI
ENGINEERS AND SURVEYORS
800 CORDOVA STREET
April 27, 1972
Mr. Rolf.Strickland
Greater Anchorage Area Borough
Department of Environmental Quality
3500 Tudor Road
Anchorage, Alaska 99507
Re- Drake Subd vi5lQu
Dear Rolf -
PHONE 907 277.1686
ANCHORAGE, ALASKA 99601
Odin Terry has asked me to check and see if we could replat Lot 1,
Block 4, Drake Subdivision, into Lots lA and 1B as indicated on the
attached plat. .It seems that from the soils determination of the site,
this might be a possibility. Please let me know as to your thoughts
and we will advise Mr. Terry accordingly.
Attachment
Yours very truly,
DICKINSo -OSW D & PARTNERS
Maurice3Id, Partner
da'pr� a
v
®EAtl'ER A.u�gC
AoRoj
LEWIS E. DICKINSON, P.E. MAURICE P. OSWALD, L.S. KENNETH B. WALCH, P.E.
126 51' L U ke 5 (] I Y6Z" ZC7
Northern Geotechnical Engineering Inc.
EXPLORATION TP1
d.b.a. Terra Firma Testing
11301 Olive Lane
IL �° Anchorage, AK 99515
Telephone: 907-344-5934
Fax: 907-344-5993
PAGE 1
OF 1
NGE-TFT PROJECT NAME: Lot 1, Block 4, Drake Subd.
NGE-TFT PROJECT NUMBER: 4316-16
EXPLORATION CONTRACTOR: Mike Anderson
EXPLORATION EQUIPMENT: Tracked Excavator
DATE STARTED: 2/11/2016
DATE COMPLETED: 2/11/2016
LOGGED BY: C. Banzhaf
EXPLORATION METHOD: Test Pit Excavation
EXPLORATION LOCATION: Anchorage, Alaska
SAMPLING METHOD: Grab Sample
aGROUNDWATER (ATD): Approx. 7.4 ft bps
GROUND ELEVATION: N/A
EXPLORATION COMPLETION: Installed one -inch PVC, and backfilled w/
ZGROUNDWATER (2/15/2016): Approx. 6.4 ft bgs
spoils.
WEATHER CONDITIONS: N/A
JCo
H
U_
=C7
p
�
}
H
�Q
IL
o- O
W
MATERIAL DESCRIPTION
W
w
REMARKS/NOTES
w Of
a
or
c9
O
a
m
J
p
0.0
1
ILL
I
CO
<
cn
SILTY SAND WITH GRAVEL (SM), brown, FILL
S1
MC = 15.8%
2.5
—
PEAT (PT), soft, dark brown, moist
Wood debris and wood chips
.'
@ 3.5 to 4' bgs..
-011
\,
5.0
o ,
7.5
SILTY SAND WITH GRAVEL (SM), stiff, gray, moist
10.0
S2
MC = 11.9%
27.1 % gravel,
27.6% sand,
45.3% silt
Bottom of test pit at 12.0 feet bgs.
kp ti7on��or�'�r� y Mu,'
Part 0z, L.a rqo, Z 50 - � 03 g
Northern Geotechnical Engineering Inc.
EXPLORATION TP2
d.b.a. Terra Firma Testing
11301 Olive Lane
IL Anchorage, Anchorage, AK 99515
Telephone: 907-344-5934
��J
Fax: 907-344-5993
PAGE 1 OF 1
NGE-TFT PROJECT NAME: Lot 1, Block 4, Drake Subd. NGE-TFT PROJECT NUMBER: 4316-16
EXPLORATION CONTRACTOR: Mike Anderson EXPLORATION EQUIPMENT: Tracked Excavator
DATE STARTED: 2/11/2016 DATE COMPLETED: 2/11/2016
LOGGED BY: C. Banzhaf EXPLORATION METHOD: Test Pit Excavation
EXPLORATION LOCATION: Anchorage, Alaska SAMPLING METHOD: Grab Sample
GROUNDWATER (ATD): Approx. 10.3 ft bgs GROUND ELEVATION: N/A
EXPLORATION COMPLETION: Installed one -inch PVC, and backfilled w/ ZGROUNDWATER (2/15/2016): Approx. 8.4 ft bgs
spoils. WEATHER CONDITIONS: N/A
co
J
of
�
U
p
g
a»
W
< O
i
Z
MATERIAL DESCRIPTION
_j
w
w
REMARKS/NOTES
w
U
N
D
Q
2
mQ
Q
0'
LL
J
0.0
vai
'
PEAT (PT)
SILTY SAND WITH GRAVEL (SM), brown, FILL
S1
MC = 22.7%
2.5
PEAT (PT), soft, dark brown, moist
Wood debris and wood chips
@ 3.5 to 4' bgs..
5.0
7.5
1+
SANDY SILT WITH GRAVEL (ML), medium stiff, gray, moist
10.0
17
S2
MC = 12.4%
16.0% gravel,
54.1 /a silt
-54.1% silt
Bottom of test pit at 12.0 feet bgs.