HomeMy WebLinkAboutPD 2021-0042; 2940 CACATUA ADU; GEOTECHNICAL UPDATE LETTER FOR ADU; 2024-06-03
GEOTECHNICAL | ENVIRONMENTAL | MATERIALS
June 3, 2024
Project No. 3766-SD
Kris Alberts
2940 Cacatua
Carlsbad, California 92008
Subject: Geotechnical Update Letter
Proposed Auxiliary Dwelling Unit (ADU)
2940 Cacatua
Carlsbad, California
References: See Page 7
Dear Mr. Alberts:
1.0 INTRODUCTION
As requested, GeoTek, Inc. (GeoTek) has prepared this letter as an update to the referenced
report (GeoTek, 2002) for the subject property located at 2940 Cacatua, Carlsbad, California.
Our work for the update was performed between October of 2023 and June of 2024. Previous
geotechnical work was performed by GeoTek with respect to the subject site in 2022 and is
presented in the “Limited Geotechnical Evaluation…” (GeoTek 2022). The purpose of our recent
work was to comment on the existing site conditions from a geotechnical standpoint, to provide
update seismic sign criteria consistent with the 2022 California Building Code (CBC), and to update
grading and foundation recommendations for the proposed construction as needed. Based on our
review of the grading plans prepared by Lattitude 33, The proposed improvements consist of a
single-story auxiliary dwelling unit (ADU) northeast of the primary residence. The existing
temporary excavation, is proposed to be excavated three to four feet further into the existing
excavation to provide a permanent retaining wall to facilitate a building pad for the ADU as well
as serve as part of the ADU building.
1.1 SITE RECONNAISSANCE
A site visit was conducted in October of 2023 to verify on-site conditions stated in the referenced
report (GeoTek, 2022) and “Temporary Excavations for ADU Retaining Wall and Grading Plan
Review…”(GeoTek, 2023) and perform subsurface sampling, laboratory analysis, and geotechnical
assessment of the Santiago Formation material strength properties. . Laboratory testing results
are attached as Appendix A. Based on our site reconnaissance, the site is in generally the same
condition as previously reported in our latest referenced document (GeoTek 2023).
GeoTek, Inc.
1384 Poinsettia Avenue, Suite A Vista, CA 92081-8505
(760) 599-0509 Offic, (760) 599-0593 Fa: www.geotekusa.com
Kris Alberts Project No. 3731-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 2
2.0 ANALYSIS
2.1 SEISMIC DESIGN PARAMETERS
The site is located at approximately 33.1130713 Latitude and -117.2389883 Longitude. Site
spectral accelerations (Ss and S1), for 0.2 and 1.0 second periods for a risk targeted two (2) percent
probability of exceedance in 50 years (MCER) were determined using the web interface provided
by SEAOC/OSHPD (https://seismicmaps.org) to access the USGS Seismic Design Parameters. A
Site Class “C” is deemed appropriate for this site based on the apparent density of the shallow
bedrock below the surface. The results are presented in the following table.
SITE SEISMIC PARAMETERS
Mapped 0.2 sec Period Spectral Acceleration, Ss 0.934g
Mapped 1.0 sec Period Spectral Acceleration, S1 0.342g
Site Coefficient for Site Class “C,” Fa 1.2
Site Coefficient for Site Class “C,” Fv 1.5
Maximum Considered Earthquake (MCER) Spectral
Response Acceleration for 0.2 Second, SMS 1.12g
Maximum Considered Earthquake (MCER) Spectral
Response Acceleration for 1.0 Second, SM1
0.513g
5% Damped Design Spectral Response Acceleration
Parameter at 0.2 Second, SDS 0.747g
5% Damped Design Spectral Response Acceleration
Parameter at 1 second, SD1
0.342g
Peak Ground Acceleration (PGAM) 0.487g
Seismic Design Category D
Final selection of the appropriate seismic design coefficients should be made by the project
structural engineer based upon the local practices and ordinances, expected building response and
desired level of conservatism.
3.0 CONCLUSIONS AND RECOMMENDATIONS
GeoTek’s recommendation presented in the referenced 2022 GeoTek report were provided
based on engineered fill and engineered retaining wall backfill. Based on the new proposed plan,
the ADU and retaining wall will be a cut/excavated condition into competent Santiago Formation.
GEOTEK
Kris Alberts Project No. 3731-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 3
Updated recommendations in accordance to the 2022 CBC and revised recommendations relevant
to the subject improvements are presented in the following section.
3.1 GENERAL NOTES
Development of the site appears feasible from a geotechnical viewpoint provided that the following
recommendations are incorporated in the design and construction phases of the development.
The following sections present general recommendations for currently anticipated site
development plans.
3.2 FOUNDATIONS
For shallow foundations, design criteria presented herein are for foundations that will bear entirely
upon competent Santiago Formation and are in general conformance with the 2022 CBC. Below
are geotechnical recommendations for foundation design, all structural design shall be performed
by the project structural engineer.
Based on visual classification of materials encountered onsite and as verified by laboratory testing,
soils near the anticipated building subgrade have a “very low” expansion index (EI<20) per ASTM
D4829.
MINIMUM DESIGN REQUIREMENTS FOR CONVENTIONALLY REINFORCED
FOUNDATIONS SUPPORTED ON ENGINEERED FILL
DESIGN PARAMETER “Very Low”
Expansion Potential (EI≤20)
Foundation Embedment Depth or Minimum Perimeter
Beam Depth (inches below lowest adjacent finished
grade)
18 inches
Minimum Foundation Width (Inches) 12 inches
Minimum Slab Thickness (actual) 4 Inches
Minimum Slab Reinforcing No. 3 rebar 16” on-center, each way, placed in the
middle one-third of the slab thickness
Minimum Footing Reinforcement No. 4 rebar two on top and two on bottom
Pre-saturation of Subgrade Soil (percent of optimum
moisture content) Minimum 100% to a depth of 12 inches
The following recommendations should be implemented into the design:
An allowable bearing capacity of 4,000 pounds per square foot (psf) may be used for
design of continuous and perimeter footings that meet the depth and width
GEOTEK
Kris Alberts Project No. 3731-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 4
requirements in the table above. This value may be increased by 600 pounds per square
foot for each additional 12 inches in depth and 300 pounds per square foot for each
additional 12 inches in width to a maximum value of 5,000 psf. Additionally, an increase
of one-third may be applied when considering short-term live loads (e.g. seismic and
wind loads).
Based on experience in the area, structural foundations may be designed in accordance
with 2022 CBC, and to withstand a total settlement of 1 inch and maximum differential
settlement of one-half of the total settlement over a horizontal distance of 40 feet.
These values assume that seismic settlement potential is not a significant constraint.
The passive earth pressure may be computed as an equivalent fluid having a density of
300 psf per foot of depth, to a maximum earth pressure of 4,500 psf for footings
founded on Santiago Formation. A coefficient of friction between soil and concrete of
0.35 may be used with dead load forces. When combining passive pressure and
frictional resistance, the passive pressure component should be reduced by one-third.
3.3 RETAINING WALLS
Recommendations presented herein may apply to typical masonry or concrete vertical retaining
walls to a maximum height of up to 12 feet. Additional review and recommendations should be
requested for higher walls. The retaining wall designer should decide if the basement wall is a
restrained wall or an active wall with an allowable deflection of 0.001H at the top of the wall.
Retaining wall foundations at least 12 inches wide embedded a minimum of 18 inches into Santiago
Formation should be designed using an allowable bearing capacity of 4,000 pounds per square foot
(psf) may be used for design of continuous and perimeter footings that meet the depth and width
requirements in the table above. This value may be increased by 600 pounds per square foot for
each additional 12 inches in depth and 300 pounds per square foot for each additional 12 inches in
width to a maximum value of 5,000 psf. Additionally, an increase of one-third may be applied when
considering short-term live loads (e.g. seismic and wind loads).
The passive earth pressure may be computed as an equivalent fluid having a density of 300 psf per
foot of depth, to a maximum earth pressure of 4,500 psf for footings founded on bedrock. A
coefficient of friction between soil and concrete of 0.35 may be used with dead load forces. Passive
pressure and frictional resistance can be combined without reduction.
Retaining walls, should consider the use of waterproofing to reduce moisture transmission through
the wall facing elements and resulting efflorescence.
GEOTEK
Kris Alberts Project No. 3731-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 5
3.3.1 Cantilevered Walls
The recommendations presented below are for cantilevered retaining walls up to 12 feet high.
Active earth pressure may be used for retaining wall design, provided the top of the wall is not
restrained from minor deflections. An equivalent fluid pressure approach may be used to compute
the horizontal pressure against the wall. Appropriate fluid unit weights are given below for specific
gradients of the restrained material. Thes do not include other superimposed loading conditions
such as traffic, structures, seismic events, or adverse geologic conditions.
ACTIVE EARTH PRESSURES
Surface Slope of Retained
Materials (h:v)
Equivalent Fluid Pressure(pcf)
Granular Materials*
Level 35
2:1 65
*Select imported granular fill with an expansion index less than 20. Backfill zone includes area between
back of wall to plane (1:1, h:v) up from back of wall foundation to ground surface.
3.3.2 Restrained Retaining Walls
Any retaining walls that will be restrained (e.g. basement walls) prior to placing and compacting
backfill material or that have reentrant or male corners, should be designed for an at-rest
equivalent fluid pressure of 70 pcf for level backfill, plus any applicable surcharge loading. For areas
of male or reentrant corners, the restrained wall design should extend a minimum distance of
twice the height of the wall laterally from the corner.
3.3.3 Wall Backfill and Drainage
Wall backfill is anticipated to be approximately 12 inches deep or less. Mechanical compaction is
anticipated to not be achievable with typical means and methods for engineered backfill.
Considering the anticipated shallow depth of backfill, pea gravel or No. 8 stone is recommended
in lieu of engineered backfill behind the retaining wall. The gravel will also provide a groundwater
drainage behind the retaining wall. The gravel is recommended to extend up from the back-drain
to within approximately 12 inches of finish grade. The upper 12 inches should consist of engineered
fill derived from onsite materials.
GEOTEK
Kris Alberts Project No. 3731-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 6
Retaining walls should be provided with an adequate pipe and gravel back drain system to reduce
the potential for hydrostatic pressures to develop. A 4-inch diameter perforated collector pipe
(Schedule 40 PVC, or approved equivalent) in a minimum of one cubic foot per lineal foot of 3/8
to one-inch clean crushed rock or equivalent, wrapped in filter fabric should be placed near the
bottom of the backfill and be directed (via a solid outlet pipe) to an appropriate disposal area.
Drain outlets should be maintained over the life of the project and should not be obstructed or
plugged by adjacent improvements.
4.0 LIMITATIONS
Our findings are based on site conditions observed and the stated sources. Thus, our comments
are professional opinions that are limited to the extent of the available data. These opinions have
been derived in accordance with current City/County standards of practice and no warranty is
expressed or implied. Standards of practice are subject to change with time.
We appreciate this opportunity to be of service. If you have any questions, or if we can be of
further service, please contact us at (760) 599-0509.
Respectfully Submitted,
GEOTEK, INC.
Appendix A – Laboratory Results
Distribution: (1) Addressee via email (PDF file)
Christopher D. Livesey
CEG, 2733, Exp. 05/31/25
Vice President
Edwin R. Cunningham
RCE 81687, Exp. 03/31/26
Project Engineer
GEOTEK
Kris Alberts Project No. 3766-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 7
REFERENCES
GeoTek, Inc. 2022, “Proposed Auxiliary Dwelling Unit (ADU), 2940 Cacatua, Carlsbad,
California,” Project No. 3766-SD, dated March 4, 2022.
______, 2022, “Response to City Review Comments for Proposed Auxiliary Dwelling Unit
(ADU), 2940 Cacatua, Carlsbad, California,” Project No. 3766-SD, dated
September 13, 2022.
______, 2023, “Temporary Excavations for ADU Retaining Wall and Grading Plan Review, 2940
Cacatua, Carlsbad, California,” Project No. 3766-SD, dated December 11, 2023.
Latitude 33, Inc. “Minor Grading Plans for 2940 Cacatua Street, Carlsbad, California,” Project
No. PD2021-0042, Grading Plan 2022-0010, dated September 7, 2022.
GEOTEK
Kris Alberts Project No. 3731-SD
Proposed Auxiliary Dwelling Unit (ADU) June 3, 2024
2940 Cacatua Street, Carlsbad, California. Page 8
APPENDIX A
RESULTS OF LABORATORY TESTING
GEOTEK
10.0 10.0 10.0
103.9 105.3 112.7
44.0 45.6 55.3
0.61 0.59 0.48
2.375 2.375 2.375
1.0 1.0 1.0
Water Content, % 17.4 17.4 16.9
Dry Density, pcf 114.0 114.0 115.0
Saturation, %99.9 99.6 99.4
Void Ratio 0.47 0.47 0.45
Height, in.0.999 0.994 0.997
Normal Stress, psf 500 1500 2500
Ф =36 ˚C =150 psf Failure Stress, psf 438 1416 1880
Displacement, in.0.090 0.140 0.260
Ultimate Stress, psf 0 0 0
Displacement, in.0.000 0.000 0.000
Strain rate, in./min.0.0100 0.0100 0.0100
In-situ
10/9/2023Date:
Technician:
Location:
Apparatus:
2 3
0-1'
Sample No. 1
At
T
e
s
t
Remolded
Void Ratio
Diameter, in.
Height, in.
Soaked, consolidated, drained. 2.375-in. remolded ring sample.Condition:
ERC/MRF
Carlsbad, CA
Saturation, %
Water Content, %
Dry Density, pcf
In
i
t
i
a
l
Project Name:2940 Cacatua St
Remarks:
Shear Strength:
Description:Tan to Orange Tan Silty Sand
3766-SD
Sample ID:B-2 R-1
Sample Depth:
Project Number:
0
500
1000
1500
2000
2500
3000
0 500 1000 1500 2000 2500 3000
Sh
e
a
r
S
t
r
e
s
s
(
p
s
f
)
Normal Stress (psf)
c = 150 (psf)
f = 36 (deg)
-0.02
-0.01
0.00
0.01
0.02
0.00 0.10 0.20 0.30 0.40 0.50
Ve
r
t
i
c
a
l
D
e
f
o
r
m
a
t
i
o
n
(
i
n
)
Horiz. Displacement (in)
0
500
1000
1500
2000
2500
3000
0.00 0.10 0.20 0.30 0.40 0.50
Sh
e
a
r
S
t
r
e
s
s
(
p
s
f
)
Horiz. Displacement (in)
DIRECT SHEAR TEST REPORT
-
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GEOTEK
GEOTECHNICAL | ENVIRONMENTAL | MATERIAL
July 18, 2024
Project No. 3766-SD
Kris Alberts
2940 Cacatua Street
Carlsbad, California
Subject: Response to City Review Comments for
Proposed Auxiliary Dwelling Unit (ADU)
Comment Letter Dated January 20, 2024
2940 Cacatua
Carlsbad, California
Dear Mr. Alberts:
As requested, GeoTek, Inc., (GeoTek) has prepared this letter to provide a response to City of
Carlsbad review comments dated January 20, 2024. A copy of the review comments addressed
herein are included in Appendix A.
Review Comment No. 1
Please provide the results of the sampling and laboratory testing (direct shear) of the onsite
bedrock that is indicated in the “Temporary Excavations for ADU Retaining Wall…” report,
and provide the basis for the parameters that were used for the slot-cut stability analysis
provided in the report.
Response to Review Comment No. 1
The laboratory test results are included in Appendix B. The following parameters were applied
for the slope stability analysis based on laboratory testing and engineering judgment.
Friction angle of Santiago Bedrock: 36 degrees
Cohesion of Santiago Bedrock: 150 psf
Unit weight of Santiago Bedrock: 118 pcf
Review Comment No. 2
Please provide the basis for the angle of the internal failure plane/active wedge used in the slot-
cut analysis provided in the report.
GeoTek, Inc.
1384 Poinsettia Avenue, Suite A Vista, CA 92081-8505
(760) 599-0509 Office (760) 599-0593 Fa www.geotekusa.com
KRIS ALBERTS Project No. 3766-SD
Response to City Review Comments July 18, 2024
2940 Cacatua, Carlsbad, California Page 2
Response to Review Comment No. 2
Further stability analysis has been completed rendering the initial slot cut analysis obsolete.
The stability analysis has been attached as Appendix C. The slope stability analysis was
performed modeling a 12 foot near vertical excavation (and included the ADU building
foundation excavation) in Santiago Formation. Off-site structures above the temporary cut are
deemed far enough away (48 feet) to not influence the excavation. Results of the analysis
concludes the temporary excavation is stable based on meeting an industry standard factor of
safety exceeding a 1.25 factor of safety.
Review Comment No. 3
As the “Temporary Excavations for ADU Retaining Wall…” report provides support for the
backcut for the ADU retaining wall that will apparently exceed the Cal OSHA guidelines for
Type A, B, or C soils and that will ultimately consist of an approximate 40’ wide and 12’ high
vertical temporary cut located approximately 1 to 2’ off the property line, please provide a
summary of the geotechnical recommendations (without relieving the contractor of their
responsibilities and obligations during construction of temporary slopes) for the temporary cut
that address the Cal-OSHA guidelines, California Code of Regulations, Title 8, Section 1541.1
(“Requirements for Protection Systems,” Appendix A), Option 4 (design by a registered
professional engineer).
Response to Review Comment No. 3
The slop stability analysis results indicated a Factor of Safety (FOS) of 1.25 or greater for the
temporary cut conditions based on the soil strength parameters applied and in a competent
excavation (i.e. fractures and tension cracks absent) and meets the minimum FOS for
temporary excavations considered by City of San Diego and peer industry standards.
It is GeoTeks opinion that the proposed temporary cut is stable and may be considered the
design for the project.
GEOTEK
KRIS ALBERTS Project No. 3766-SD
Response to City Review Comments July 18, 2024
2940 Cacatua, Carlsbad, California Page 3
The opportunity to be of service is sincerely appreciated. If you should have any questions,
please do not hesitate to call GeoTek.
Respectfully submitted,
GeoTek, Inc.
Attachments: Appendix A – City of Carlsbad Review Comments
Appendix B – Laboratory Test Data
Appendix C – Slope Stability
Distribution: (1) Addressee via email
Edwin R. Cunningham
RCE 81687, Exp. 3/31/26
Project Engineer
Christopher D. Livesey
CEG 2733, Exp. 05/31/25
Vice President
GEOTEK
SELECTED REFERENCES
GeoTek, Inc. 2022, “Proposed Auxiliary Dwelling Unit (ADU), 2940 Cacatua, Carlsbad,
California,” Project No. 3766-SD, dated March 4, 2022.
______, 2022, “Response to City Review Comments for Proposed Auxiliary Dwelling Unit
(ADU), 2940 Cacatua, Carlsbad, California,” Project No. 3766-SD, dated
September 13, 2022.
_____, 2023, “Temporary Excavations for ADU Wall and Grading Plan Review, 2940 Cacatua,
Carlsbad, California,” Project No. 3766-SD, dated December 11, 2023.
_____, 2024, “Geotechnical Update Letter, Proposed Auxiliary Dwelling Unit (ADU), 2940
Cacatua, Carlsbad, California,” Project No. 3766-SD, dated June 3 2024.
Latitude 33, Inc. “Minor Grading Plans for 2940 Cacatua Street, Carlsbad, California,” Project
No. PD2021-0042, Grading Plan 2022-0010, Delta No. 1, dated December 8,
2023.
Paul Christenson San Diego Engineering, “Alberts ADU, 2940 Cacatua Street, Carlsbad, CA
92009,” Job No. 21-121, sheets SN1, S1, and SD1, revised June, 21, 2021.
GEOTEK
APPENDIX A
City of Carlsbad Review Comments
GEOTEK
GEOTECHNICAL REPORT REVIEW
__________________________________________________________
DATE: January 20, 2024
TO: City of Carlsbad
Land Development Engineering
1635 Faraday Avenue
Carlsbad, CA 92008
Attention: Nichole Fine
PROJECT ID: PD2021-0042
GRADING PERMIT NO.: GR2022-0010
SUBJECT: 2940 Cacatua Street (1st review of Delta 1)
Items Submitted by Applicant Items Being Returned to Applicant
“Limited Geotechnical Evaluation, Proposed
Auxiliary Dwelling Unit (ADU), 2940 Cacatua
Street, Carlsbad, California,” by GeoTek, Inc.,
dated March 4, 2022.
“Response to City Review Comments for
Proposed Auxiliary Dwelling Unit (ADU), 2940
Cacatua Street, Carlsbad, California,” by
GeoTek, Inc., dated September 13, 2022.
“Temporary Excavations for ADU Retaining Wall
and Grading Plan Review, 2940 Cacatua Street,
Carlsbad, California,” by GeoTek, Inc., dated
December 11, 2023.
Written comments.
Based on our review of the submitted geotechnical reports, we are providing the following written
comments regarding the proposed revised location/height of the temporary cut necessary to
construct the retaining wall associated with the proposed ADU.
GEOTECHNICAL COMMENTS:
1. Please provide the results of the sampling and laboratory testing (direct shear) of the on-
site bedrock that is indicated in the “Temporary Excavations for ADU Retaining Wall…”
report, and provide the basis for the parameters that were used for the slot-cut stability
analysis provided in the report.
2. Please provide the basis for the angle of the internal failure plane/active wedge used in
the slot-cut analysis provided in the report.
GR2022-0010
January 20, 2024
Page 2 of 2
3. As the “Temporary Excavations for ADU Retaining Wall…” report provides support for the
backcut for the ADU retaining wall that will apparently exceed the Cal OSHA guidelines
for Type A, B, or C soils and that will ultimately consist of an approximate 40’ wide and 12’
high vertical temporary cut located approximately 1 to 2’ off the property line, please
provide a summary of the geotechnical recommendations (without relieving the contractor
of their responsibilities and obligations during construction of temporary slopes) for the
temporary cut that address the Cal-OSHA guidelines, California Code of Regulations, Title
8, Section 1541.1 (“Requirements for Protection Systems,” Appendix A), Option 4 (design
by a registered professional engineer).
APPENDIX B
Laboratory Test Results
GEOTEK
10.0 10.0 10.0
103.9 105.3 112.7
44.0 45.6 55.3
0.61 0.59 0.48
2.375 2.375 2.375
1.0 1.0 1.0
Water Content, % 17.4 17.4 16.9
Dry Density, pcf 114.0 114.0 115.0
Saturation, %99.9 99.6 99.4
Void Ratio 0.47 0.47 0.45
Height, in.0.999 0.994 0.997
Normal Stress, psf 500 1500 2500
Ф =36 ˚C =150 psf Failure Stress, psf 438 1416 1880
Displacement, in.0.090 0.140 0.260
Ultimate Stress, psf 0 0 0
Displacement, in.0.000 0.000 0.000
Strain rate, in./min.0.0100 0.0100 0.0100
In-situ
3766-SD
Sample ID:B-2 R-1
Sample Depth:
Project Number:
Dry Density, pcf
In
i
t
i
a
l
Project Name:2940 Cacatua St
Remarks:
Shear Strength:
Description:Tan to Orange Tan Silty Sand
2 3
0-1'
Sample No. 1
At
T
e
s
t
Remolded
Void Ratio
Diameter, in.
Height, in.
Soaked, consolidated, drained. 2.375-in. remolded ring sample.Condition:
ERC/MRF
Carlsbad, CA
Saturation, %
Water Content, %
10/9/2023Date:
Technician:
Location:
Apparatus:
0
500
1000
1500
2000
2500
3000
0 500 1000 1500 2000 2500 3000
Sh
e
a
r
S
t
r
e
s
s
(
p
s
f
)
Normal Stress (psf)
c = 150 (psf)
f = 36 (deg)
-0.02
-0.01
0.00
0.01
0.02
0.00 0.10 0.20 0.30 0.40 0.50
Ve
r
t
i
c
a
l
D
e
f
o
r
m
a
t
i
o
n
(
i
n
)
Horiz. Displacement (in)
0
500
1000
1500
2000
2500
3000
0.00 0.10 0.20 0.30 0.40 0.50
Sh
e
a
r
S
t
r
e
s
s
(
p
s
f
)
Horiz. Displacement (in)
DIRECT SHEAR TEST REPORT
-
/
/ ,-v ~
/
Jr "'-◄ V /
V V V
f/ v ·~
(/ "-IL
~
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A
GEOTEK
APPENDIX C
Slope Stability
GEOTEK
1.41.41.41.4
Phi
(°)
Cohesion
(psf)
Strength
Type
Unit
Weight
(lbs/ft3)
ColorMaterial
Name
36150Mohr
Coulomb118Tsa
Min FSMethod Name
1.4Bishop simplified
1.4Spencer
1.4GLE / MorgensternPrice
PL
0 10 20 30 40 50 60 70 80
Analysis Temporary StabilityGroupGEOTECHNICAL
Company GeoTek, Inc.Drawn By ERC
File Name 3766-SD_Cross-Section_AA_(2)_2024-07-17.slimDate7/18/2024
Project:
SLIDEINTERPRET 9.029
2940 CACATUA
0
LO
0
LO
□
I I I I I 11
I I I
~ ~=:;::.=-~~~~.=;:::::=-~-==:::;:::::==;:::=,~-;::::::::;:=-~~--.-----.-----.
GEOTEK
2940 Cacatua Street
GeoTek, Inc.
Date Created: 11/1/2023, 12:17:20 PM
Software Version: 9.029
LJ . rocsc1ence
Table of Contents
Project Summary ...................................................................................................................................................... 3
General Settings ....................................................................................................................................................... 4
Analysis Options ....................................................................................................................................................... 5
Groundwater Analysis ............................................................................................................................................... 6
Random Numbers ..................................................................................................................................................... 7
Surface Options ........................................................................................................................................................ 8
Seismic Loading ........................................................................................................................................................ 9
Materials ................................................................................................................................................................ 10
Global Minimums .................................................................................................................................................... 11
Method: bishop simplified ......................................................................................................................... 11
Method: spencer ...................................................................................................................................... 11
Method: gle/morgenstern-price ................................................................................................................. 11
Slice Data ............................................................................................................................................................... 12
Global Minimum Query (bishop simplified) - Safety Factor: 1.3698 ............................................................... 12
Global Minimum Query (spencer) - Safety Factor: 1.44956 .......................................................................... 13
Global Minimum Query (gle/morgenstern-price) - Safety Factor: 1.44972 ..................................................... 14
Interslice Data ........................................................................................................................................................ 15
Global Minimum Query (bishop simplified) - Safety Factor: 1.3698 ............................................................... 15
Global Minimum Query (spencer) - Safety Factor: 1.44956 .......................................................................... 16
Global Minimum Query (gle/morgenstern-price) - Safety Factor: 1.44972 ..................................................... 17
Entity Information ................................................................................................................................................... 18
External Boundary .................................................................................................................................... 18
Material Boundary .................................................................................................................................... 18
2/18
Thursday, July 18, 20242940 Cacatua Street
Slide2 Analysis Information
2940 Cacatua Street
Project Summary
Slide2 Modeler Version:9.029
Author:ERC
Company:GeoTek, Inc.
Date Created:11/1/2023, 12:17:20 PM
3/18
Thursday, July 18, 20242940 Cacatua Street
General Settings
Units of Measurement:Imperial Units
Time Units:days
Permeability Units:feet/second
Data Output:Standard
Failure Direction:Right to Left
4/18
Thursday, July 18, 20242940 Cacatua Street
Analysis Options
Slices Type:Vertical
Analysis Methods Used
Bishop simplified
GLE/Morgenstern-Price with interslice force function
(Half Sine)
Spencer
Number of slices:50
Tolerance:0.005
Maximum number of iterations:75
Check malpha < 0.2:Yes
Create Interslice boundaries at intersections with water
tables and piezos:Yes
Initial trial value of FS:1
Steffensen Iteration:Yes
Eliminate vertical segments in non-circular search Yes
5/18
Thursday, July 18, 20242940 Cacatua Street
Groundwater Analysis
Groundwater Method:Water Surfaces
Pore Fluid Unit Weight [lbs/ft3]:62.4
Advanced Groundwater Method:None
6/18
Thursday, July 18, 20242940 Cacatua Street
Random Numbers
Pseudo-random Seed:10116
Random Number Generation Method:Park and Miller v.3
7/18
Thursday, July 18, 20242940 Cacatua Street
Surface Options
Surface Type:Circular
Search Method:Auto Refine Search
Divisions along slope:20
Circles per division:10
Number of iterations:10
Divisions to use in next iteration:50%
Composite Surfaces:Disabled
Minimum Elevation:Not Defined
Minimum Depth:Not Defined
Minimum Area:Not Defined
Minimum Weight:Not Defined
8/18
Thursday, July 18, 20242940 Cacatua Street
Seismic Loading
Advanced seismic analysis:No
Staged pseudostatic analysis:No
9/18
Thursday, July 18, 20242940 Cacatua Street
Materials
Tsa
Color
Strength Type Mohr-Coulomb
Unit Weight 118 lbs/ft3
Cohesion 150 psf
Phi 36 °
Water Surface None
Ru Value 0
10/18
Thursday, July 18, 20242940 Cacatua Street
□
Global Minimums
Method: bishop simplified
FS 1.369800
Center: 32.029, 519.524
Radius:10.743
Left Slip Surface Endpoint:37.000, 510.001
Right Slip Surface Endpoint:42.771, 519.524
Resisting Moment:30126 lb-ft
Driving Moment:21993.1 lb-ft
Total Slice Area:22.8394 ft2
Surface Horizontal Width:5.77122 ft
Surface Average Height:3.95747 ft
Method: spencer
FS 1.449560
Center: 15.116, 536.442
Radius:34.294
Left Slip Surface Endpoint:37.018, 510.053
Right Slip Surface Endpoint:44.999, 519.617
Resisting Moment:114815 lb-ft
Driving Moment:79207.1 lb-ft
Resisting Horizontal Force:2167.59 lb
Driving Horizontal Force:1495.35 lb
Total Slice Area:26.1085 ft2
Surface Horizontal Width:7.98076 ft
Surface Average Height:3.27143 ft
Method: gle/morgenstern-price
FS 1.449720
Center: 15.116, 536.442
Radius:34.294
Left Slip Surface Endpoint:37.018, 510.053
Right Slip Surface Endpoint:44.999, 519.617
Resisting Moment:114828 lb-ft
Driving Moment:79207.1 lb-ft
Resisting Horizontal Force:2167.97 lb
Driving Horizontal Force:1495.44 lb
Total Slice Area:26.1085 ft2
Surface Horizontal Width:7.98076 ft
Surface Average Height:3.27143 ft
11/18
Thursday, July 18, 20242940 Cacatua Street
Global Minimum Support Data
No Supports Present
Slice Data
Global Minimum Query (bishop simplified) - Safety Factor: 1.3698
Slice
Number Width [ft]Weight
[lbs]
Angle of
Slice Base
[deg]
Base
Material
Base
Cohesion
[psf]
Base
Friction
Angle
[deg]
Shear
Stress
[psf]
Shear
Strength
[psf]
Base
Normal
Stress
[psf]
Pore
Pressure
[psf]
Effective
Normal
Stress
[psf]
Base
Vertical
Stress
[psf]
Effective
Vertical
Stress
[psf]
1 0.115424 1.87618 27.9149 Tsa 150 36 92.2145 126.315 -32.599 0 -32.599 16.2567 16.2567
2 0.115424 5.61617 28.6139 Tsa 150 36 104.947 143.757 -8.59291 0 -8.59291 48.6592 48.6592
3 0.115424 9.3312 29.3175 Tsa 150 36 117.413 160.832 14.9091 0 14.9091 80.8453 80.8453
4 0.115424 13.0207 30.0261 Tsa 150 36 129.609 177.538 37.9025 0 37.9025 112.811 112.811
5 0.115424 16.6842 30.7397 Tsa 150 36 141.532 193.87 60.3823 0 60.3823 144.55 144.55
6 0.115424 20.3211 31.4587 Tsa 150 36 153.18 209.826 82.3431 0 82.3431 176.06 176.06
7 0.115424 23.9308 32.1832 Tsa 150 36 164.549 225.399 103.778 0 103.778 207.333 207.333
8 0.115424 27.5126 32.9136 Tsa 150 36 175.636 240.587 124.682 0 124.682 238.365 238.365
9 0.115424 31.0658 33.65 Tsa 150 36 186.437 255.382 145.047 0 145.047 269.15 269.15
10 0.115424 34.5898 34.3928 Tsa 150 36 196.948 269.78 164.863 0 164.863 299.68 299.68
11 0.115424 38.0837 35.1422 Tsa 150 36 207.165 283.775 184.125 0 184.125 329.951 329.951
12 0.115424 41.5467 35.8986 Tsa 150 36 217.081 297.358 202.821 0 202.821 359.953 359.953
13 0.115424 44.9779 36.6623 Tsa 150 36 226.692 310.523 220.942 0 220.942 389.681 389.681
14 0.115424 48.3763 37.4337 Tsa 150 36 235.992 323.262 238.475 0 238.475 419.125 419.125
15 0.115424 51.741 38.2131 Tsa 150 36 244.974 335.566 255.409 0 255.409 448.276 448.276
16 0.115424 55.0709 39.0009 Tsa 150 36 253.632 347.425 271.732 0 271.732 477.126 477.126
17 0.115424 58.3647 39.7976 Tsa 150 36 261.956 358.828 287.427 0 287.427 505.662 505.662
18 0.115424 61.6213 40.6036 Tsa 150 36 269.941 369.765 302.481 0 302.481 533.878 533.878
19 0.115424 64.8393 41.4195 Tsa 150 36 277.575 380.222 316.874 0 316.874 561.757 561.757
20 0.115424 68.0172 42.2458 Tsa 150 36 284.85 390.187 330.589 0 330.589 589.29 589.29
21 0.115424 71.1535 43.0831 Tsa 150 36 291.754 399.644 343.606 0 343.606 616.463 616.463
22 0.115424 74.2463 43.9319 Tsa 150 36 298.276 408.578 355.901 0 355.901 643.259 643.259
23 0.115424 77.2939 44.7931 Tsa 150 36 304.401 416.969 367.452 0 367.452 669.662 669.662
24 0.115424 80.2942 45.6673 Tsa 150 36 310.118 424.8 378.23 0 378.23 695.657 695.657
25 0.115424 83.245 46.5554 Tsa 150 36 315.41 432.048 388.206 0 388.206 721.222 721.222
26 0.115424 86.1435 47.4583 Tsa 150 36 320.258 438.689 397.346 0 397.346 746.335 746.335
27 0.115424 86.9189 48.3769 Tsa 150 36 318.691 436.543 394.393 0 394.393 753.052 753.052
28 0.115424 85.6559 49.3125 Tsa 150 36 311.16 426.227 380.195 0 380.195 742.111 742.111
29 0.115424 84.3319 50.2662 Tsa 150 36 303.422 415.628 365.606 0 365.606 730.641 730.641
30 0.115424 82.9432 51.2393 Tsa 150 36 295.466 404.73 350.606 0 350.606 718.609 718.609
31 0.115424 81.4855 52.2336 Tsa 150 36 287.281 393.517 335.172 0 335.172 705.981 705.981
32 0.115424 79.9542 53.2506 Tsa 150 36 278.851 381.97 319.279 0 319.279 692.714 692.714
33 0.115424 78.3439 54.2925 Tsa 150 36 270.161 370.067 302.897 0 302.897 678.762 678.762
34 0.115424 76.6485 55.3614 Tsa 150 36 261.196 357.786 285.994 0 285.994 664.073 664.073
35 0.115424 74.8608 56.4601 Tsa 150 36 251.934 345.099 268.531 0 268.531 648.586 648.586
36 0.115424 72.9728 57.5915 Tsa 150 36 242.353 331.975 250.467 0 250.467 632.229 632.229
37 0.115424 70.9747 58.7593 Tsa 150 36 232.426 318.377 231.751 0 231.751 614.918 614.918
38 0.115424 68.8551 59.9678 Tsa 150 36 222.122 304.263 212.326 0 212.326 596.554 596.554
39 0.115424 66.6002 61.2223 Tsa 150 36 211.405 289.583 192.12 0 192.12 577.019 577.019
40 0.115424 64.1931 62.5289 Tsa 150 36 200.231 274.276 171.051 0 171.051 556.165 556.165
41 0.115424 61.613 63.8957 Tsa 150 36 188.544 258.268 149.018 0 149.018 533.813 533.813
42 0.115424 58.8332 65.3329 Tsa 150 36 176.278 241.466 125.892 0 125.892 509.728 509.728
43 0.115424 55.8188 66.8535 Tsa 150 36 163.347 223.752 101.512 0 101.512 483.613 483.613
44 0.115424 52.5231 68.4755 Tsa 150 36 149.636 204.971 75.6614 0 75.6614 455.059 455.059
45 0.115424 48.8798 70.2243 Tsa 150 36 134.99 184.909 48.0478 0 48.0478 423.495 423.495
46 0.115424 44.5777 72.1376 Tsa 150 36 118.812 162.748 17.5467 0 17.5467 386.223 386.223
47 0.115424 39.4125 74.2771 Tsa 150 36 100.768 138.032 -16.4725 0 -16.4725 341.473 341.473
48 0.115424 33.3459 76.7568 Tsa 150 36 80.7516 110.614 -54.2108 0 -54.2108 288.913 288.913
49 0.115424 25.682 79.847 Tsa 150 36 57.4304 78.6682 -98.1798 0 -98.1798 222.515 222.515
50 0.115424 10.6627 85.7967 Tsa 150 36 19.2904 26.424 -170.088 0 -170.088 92.3912 92.3912
12/18
Thursday, July 18, 20242940 Cacatua Street
Global Minimum Query (spencer) - Safety Factor: 1.44956
Slice
Number Width [ft]Weight
[lbs]
Angle of
Slice Base
[deg]
Base
Material
Base
Cohesion
[psf]
Base
Friction
Angle
[deg]
Shear
Stress
[psf]
Shear
Strength
[psf]
Base
Normal
Stress
[psf]
Pore
Pressure
[psf]
Effective
Normal
Stress
[psf]
Base
Vertical
Stress
[psf]
Effective
Vertical
Stress
[psf]
1 0.159615 3.12889 39.8653 Tsa 150 36 111.117 161.071 15.2375 0 15.2375 108.031 108.031
2 0.159615 9.37107 40.2136 Tsa 150 36 122.017 176.871 36.9855 0 36.9855 140.148 140.148
3 0.159615 15.5818 40.5638 Tsa 150 36 132.667 192.31 58.234 0 58.234 171.798 171.798
4 0.159615 21.7607 40.9157 Tsa 150 36 143.068 207.385 78.9836 0 78.9836 202.981 202.981
5 0.159615 27.9071 41.2696 Tsa 150 36 153.218 222.099 99.2353 0 99.2353 233.697 233.697
6 0.159615 34.0206 41.6254 Tsa 150 36 163.119 236.451 118.989 0 118.989 263.942 263.942
7 0.159615 40.1005 41.9831 Tsa 150 36 172.77 250.441 138.245 0 138.245 293.716 293.716
8 0.159615 46.1464 42.3429 Tsa 150 36 182.173 264.07 157.003 0 157.003 323.017 323.017
9 0.159615 52.1576 42.7047 Tsa 150 36 191.324 277.336 175.263 0 175.263 351.841 351.841
10 0.159615 58.1336 43.0687 Tsa 150 36 200.226 290.24 193.024 0 193.024 380.188 380.188
11 0.159615 64.0737 43.4348 Tsa 150 36 208.878 302.781 210.286 0 210.286 408.052 408.052
12 0.159615 69.9772 43.8032 Tsa 150 36 217.279 314.959 227.047 0 227.047 435.433 435.433
13 0.159615 75.8435 44.1739 Tsa 150 36 225.428 326.772 243.305 0 243.305 462.325 462.325
14 0.159615 81.6719 44.5469 Tsa 150 36 233.325 338.219 259.061 0 259.061 488.724 488.724
15 0.159615 87.4616 44.9223 Tsa 150 36 240.969 349.299 274.311 0 274.311 514.627 514.627
16 0.159615 93.2119 45.3001 Tsa 150 36 248.358 360.01 289.054 0 289.054 540.028 540.028
17 0.159615 98.9219 45.6805 Tsa 150 36 255.492 370.351 303.287 0 303.287 564.921 564.921
18 0.159615 104.591 46.0636 Tsa 150 36 262.369 380.319 317.007 0 317.007 589.301 589.301
19 0.159615 109.825 46.4493 Tsa 150 36 268.385 389.04 329.01 0 329.01 611.327 611.327
20 0.159615 109.462 46.8377 Tsa 150 36 265.748 385.217 323.748 0 323.748 607.114 607.114
21 0.159615 107.259 47.229 Tsa 150 36 260.358 377.405 312.996 0 312.996 594.443 594.443
22 0.159615 105.012 47.6231 Tsa 150 36 254.968 369.591 302.241 0 302.241 581.693 581.693
23 0.159615 102.718 48.0203 Tsa 150 36 249.576 361.776 291.484 0 291.484 568.865 568.865
24 0.159615 100.378 48.4206 Tsa 150 36 244.185 353.961 280.728 0 280.728 555.96 555.96
25 0.159615 97.9904 48.824 Tsa 150 36 238.795 346.148 269.975 0 269.975 542.979 542.979
26 0.159615 95.5535 49.2307 Tsa 150 36 233.408 338.339 259.226 0 259.226 529.926 529.926
27 0.159615 93.0664 49.6408 Tsa 150 36 228.024 330.535 248.485 0 248.485 516.8 516.8
28 0.159615 90.5277 50.0544 Tsa 150 36 222.646 322.739 237.754 0 237.754 503.606 503.606
29 0.159615 87.9361 50.4716 Tsa 150 36 217.274 314.952 227.038 0 227.038 490.346 490.346
30 0.159615 85.2902 50.8924 Tsa 150 36 211.911 307.178 216.337 0 216.337 477.024 477.024
31 0.159615 82.5886 51.3172 Tsa 150 36 206.559 299.419 205.658 0 205.658 463.643 463.643
32 0.159615 79.8296 51.7459 Tsa 150 36 201.218 291.678 195.003 0 195.003 450.209 450.209
33 0.159615 76.8826 52.1787 Tsa 150 36 195.727 283.718 184.047 0 184.047 436.183 436.183
34 0.159615 73.2014 52.6157 Tsa 150 36 189.407 274.557 171.438 0 171.438 419.313 419.313
35 0.159615 69.3606 53.0572 Tsa 150 36 183.018 265.295 158.69 0 158.69 402.068 402.068
36 0.159615 65.4554 53.5032 Tsa 150 36 176.687 256.119 146.061 0 146.061 384.868 384.868
37 0.159615 61.4836 53.954 Tsa 150 36 170.421 247.036 133.558 0 133.558 367.727 367.727
38 0.159615 57.4431 54.4097 Tsa 150 36 164.223 238.051 121.192 0 121.192 350.658 350.658
39 0.159615 53.3317 54.8705 Tsa 150 36 158.098 229.173 108.972 0 108.972 333.678 333.678
40 0.159615 49.1467 55.3367 Tsa 150 36 152.053 220.41 96.9112 0 96.9112 316.804 316.804
41 0.159615 44.8857 55.8084 Tsa 150 36 146.094 211.772 85.0218 0 85.0218 300.06 300.06
42 0.159615 40.5458 56.2859 Tsa 150 36 140.228 203.269 73.3177 0 73.3177 283.468 283.468
43 0.159615 36.124 56.7694 Tsa 150 36 134.462 194.911 61.8152 0 61.8152 267.056 267.056
44 0.159615 31.6172 57.2593 Tsa 150 36 128.807 186.713 50.5314 0 50.5314 250.855 250.855
45 0.159615 27.0219 57.7557 Tsa 150 36 123.271 178.688 39.4858 0 39.4858 234.901 234.901
46 0.159615 22.3343 58.2591 Tsa 150 36 117.865 170.852 28.7004 0 28.7004 219.235 219.235
47 0.159615 17.5507 58.7697 Tsa 150 36 112.601 163.222 18.1992 0 18.1992 203.905 203.905
48 0.159615 12.6665 59.288 Tsa 150 36 107.494 155.819 8.00922 0 8.00922 188.963 188.963
49 0.159615 7.67729 59.8142 Tsa 150 36 102.558 148.664 -1.83911 0 -1.83911 174.474 174.474
50 0.159615 2.5779 60.3489 Tsa 150 36 98.5686 142.881 -9.79827 0 -9.79827 163.354 163.354
13/18
Thursday, July 18, 20242940 Cacatua Street
Global Minimum Query (gle/morgenstern-price) - Safety Factor: 1.44972
Slice
Number Width [ft]Weight
[lbs]
Angle of
Slice Base
[deg]
Base
Material
Base
Cohesion
[psf]
Base
Friction
Angle
[deg]
Shear
Stress
[psf]
Shear
Strength
[psf]
Base
Normal
Stress
[psf]
Pore
Pressure
[psf]
Effective
Normal
Stress
[psf]
Base
Vertical
Stress
[psf]
Effective
Vertical
Stress
[psf]
1 0.159615 3.12889 39.8653 Tsa 150 36 83.1487 120.542 -40.5449 0 -40.5449 28.8928 28.8928
2 0.159615 9.37107 40.2136 Tsa 150 36 102.517 148.621 -1.89828 0 -1.89828 84.7771 84.7771
3 0.159615 15.5818 40.5638 Tsa 150 36 120.504 174.697 33.9929 0 33.9929 137.145 137.145
4 0.159615 21.7607 40.9157 Tsa 150 36 137.126 198.794 67.1591 0 67.1591 186.007 186.007
5 0.159615 27.9071 41.2696 Tsa 150 36 152.419 220.965 97.6752 0 97.6752 231.435 231.435
6 0.159615 34.0206 41.6254 Tsa 150 36 166.439 241.29 125.649 0 125.649 273.552 273.552
7 0.159615 40.1005 41.9831 Tsa 150 36 179.251 259.864 151.215 0 151.215 312.518 312.518
8 0.159615 46.1464 42.3429 Tsa 150 36 190.93 276.795 174.518 0 174.518 348.513 348.513
9 0.159615 52.1576 42.7047 Tsa 150 36 201.551 292.193 195.712 0 195.712 381.729 381.729
10 0.159615 58.1336 43.0687 Tsa 150 36 211.191 306.168 214.947 0 214.947 412.36 412.36
11 0.159615 64.0737 43.4348 Tsa 150 36 219.92 318.823 232.365 0 232.365 440.587 440.587
12 0.159615 69.9772 43.8032 Tsa 150 36 227.806 330.255 248.1 0 248.1 466.583 466.583
13 0.159615 75.8435 44.1739 Tsa 150 36 234.909 340.552 262.272 0 262.272 490.503 490.503
14 0.159615 81.6719 44.5469 Tsa 150 36 241.285 349.796 274.995 0 274.995 512.494 512.494
15 0.159615 87.4616 44.9223 Tsa 150 36 246.988 358.064 286.376 0 286.376 532.695 532.695
16 0.159615 93.2119 45.3001 Tsa 150 36 252.073 365.435 296.521 0 296.521 551.248 551.248
17 0.159615 98.9219 45.6805 Tsa 150 36 256.594 371.99 305.543 0 305.543 568.307 568.307
18 0.159615 104.591 46.0636 Tsa 150 36 260.619 377.824 313.572 0 313.572 584.051 584.051
19 0.159615 109.825 46.4493 Tsa 150 36 263.677 382.258 319.676 0 319.676 597.041 597.041
20 0.159615 109.462 46.8377 Tsa 150 36 258.994 375.469 310.331 0 310.331 586.496 586.496
21 0.159615 107.259 47.229 Tsa 150 36 252.196 365.613 296.766 0 296.766 569.389 569.389
22 0.159615 105.012 47.6231 Tsa 150 36 245.803 356.345 284.01 0 284.01 553.417 553.417
23 0.159615 102.718 48.0203 Tsa 150 36 239.835 347.693 272.101 0 272.101 538.654 538.654
24 0.159615 100.378 48.4206 Tsa 150 36 234.305 339.676 261.067 0 261.067 525.161 525.161
25 0.159615 97.9904 48.824 Tsa 150 36 229.219 332.304 250.921 0 250.921 512.978 512.978
26 0.159615 95.5535 49.2307 Tsa 150 36 224.575 325.571 241.653 0 241.653 502.108 502.108
27 0.159615 93.0664 49.6408 Tsa 150 36 220.353 319.45 233.228 0 233.228 492.516 492.516
28 0.159615 90.5277 50.0544 Tsa 150 36 216.522 313.896 225.583 0 225.583 484.122 484.122
29 0.159615 87.9361 50.4716 Tsa 150 36 213.035 308.841 218.626 0 218.626 476.796 476.796
30 0.159615 85.2902 50.8924 Tsa 150 36 209.831 304.196 212.232 0 212.232 470.359 470.359
31 0.159615 82.5886 51.3172 Tsa 150 36 206.836 299.854 206.256 0 206.256 464.588 464.588
32 0.159615 79.8296 51.7459 Tsa 150 36 203.967 295.695 200.532 0 200.532 459.225 459.225
33 0.159615 76.8826 52.1787 Tsa 150 36 200.99 291.379 194.592 0 194.592 453.507 453.507
34 0.159615 73.2014 52.6157 Tsa 150 36 197.192 285.873 187.014 0 187.014 445.076 445.076
35 0.159615 69.3606 53.0572 Tsa 150 36 193.094 279.932 178.836 0 178.836 435.612 435.612
36 0.159615 65.4554 53.5032 Tsa 150 36 188.703 273.567 170.076 0 170.076 425.124 425.124
37 0.159615 61.4836 53.954 Tsa 150 36 183.939 266.66 160.569 0 160.569 413.312 413.312
38 0.159615 57.4431 54.4097 Tsa 150 36 178.734 259.114 150.183 0 150.183 399.925 399.925
39 0.159615 53.3317 54.8705 Tsa 150 36 173.04 250.86 138.822 0 138.822 384.765 384.765
40 0.159615 49.1467 55.3367 Tsa 150 36 166.827 241.852 126.424 0 126.424 367.682 367.682
41 0.159615 44.8857 55.8084 Tsa 150 36 160.074 232.062 112.949 0 112.949 348.564 348.564
42 0.159615 40.5458 56.2859 Tsa 150 36 152.766 221.468 98.3673 0 98.3673 327.308 327.308
43 0.159615 36.124 56.7694 Tsa 150 36 144.884 210.042 82.6403 0 82.6403 303.789 303.789
44 0.159615 31.6172 57.2593 Tsa 150 36 136.389 197.726 65.689 0 65.689 277.805 277.805
45 0.159615 27.0219 57.7557 Tsa 150 36 127.206 184.413 47.3654 0 47.3654 249.019 249.019
46 0.159615 22.3343 58.2591 Tsa 150 36 117.208 169.919 27.4162 0 27.4162 216.89 216.89
47 0.159615 17.5507 58.7697 Tsa 150 36 106.197 153.956 5.4452 0 5.4452 180.589 180.589
48 0.159615 12.6665 59.288 Tsa 150 36 93.8839 136.105 -19.1243 0 -19.1243 138.919 138.919
49 0.159615 7.67729 59.8142 Tsa 150 36 79.8716 115.791 -47.0841 0 -47.0841 90.2274 90.2274
50 0.159615 2.5779 60.3489 Tsa 150 36 63.6414 92.2622 -79.4692 0 -79.4692 32.3278 32.3278
14/18
Thursday, July 18, 20242940 Cacatua Street
Interslice Data
Global Minimum Query (bishop simplified) - Safety Factor: 1.3698
Slice Number X coordinate [ft]Y coordinate - Bottom
[ft]
Interslice Normal Force
[lbs]
Interslice Shear Force
[lbs]
Interslice Force Angle
[deg]
1 37.0002 510.001 0 0 0
2 37.1157 510.062 12.6369 0 0
3 37.2311 510.125 25.2909 0 0
4 37.3465 510.19 37.8762 0 0
5 37.4619 510.256 50.3071 0 0
6 37.5774 510.325 62.4978 0 0
7 37.6928 510.396 74.3629 0 0
8 37.8082 510.468 85.8167 0 0
9 37.9236 510.543 96.7735 0 0
10 38.039 510.62 107.148 0 0
11 38.1545 510.699 116.853 0 0
12 38.2699 510.78 125.804 0 0
13 38.3853 510.864 133.914 0 0
14 38.5007 510.949 141.096 0 0
15 38.6162 511.038 147.264 0 0
16 38.7316 511.129 152.329 0 0
17 38.847 511.222 156.204 0 0
18 38.9624 511.318 158.8 0 0
19 39.0779 511.417 160.028 0 0
20 39.1933 511.519 159.798 0 0
21 39.3087 511.624 158.02 0 0
22 39.4241 511.732 154.602 0 0
23 39.5396 511.843 149.453 0 0
24 39.655 511.958 142.479 0 0
25 39.7704 512.076 133.587 0 0
26 39.8858 512.198 122.682 0 0
27 40.0013 512.323 109.668 0 0
28 40.1167 512.453 95.219 0 0
29 40.2321 512.588 80.091 0 0
30 40.3475 512.726 64.343 0 0
31 40.463 512.87 48.0421 0 0
32 40.5784 513.019 31.2644 0 0
33 40.6938 513.174 14.0965 0 0
34 40.8092 513.334 -3.36243 0 0
35 40.9247 513.501 -20.9981 0 0
36 41.0401 513.676 -38.6775 0 0
37 41.1555 513.857 -56.2452 0 0
38 41.2709 514.048 -73.5172 0 0
39 41.3864 514.247 -90.2732 0 0
40 41.5018 514.458 -106.247 0 0
41 41.6172 514.68 -121.11 0 0
42 41.7326 514.915 -134.452 0 0
43 41.8481 515.166 -145.746 0 0
44 41.9635 515.436 -154.301 0 0
45 42.0789 515.729 -159.173 0 0
46 42.1943 516.05 -159.017 0 0
47 42.3097 516.408 -151.589 0 0
48 42.4252 516.818 -133.204 0 0
49 42.5406 517.309 -97.2962 0 0
50 42.656 517.953 -27.3872 0 0
51 42.7714 519.524 0 0 0
15/18
Thursday, July 18, 20242940 Cacatua Street
Global Minimum Query (spencer) - Safety Factor: 1.44956
Slice Number X coordinate [ft]Y coordinate - Bottom
[ft]
Interslice Normal Force
[lbs]
Interslice Shear Force
[lbs]
Interslice Force Angle
[deg]
1 37.0182 510.053 0 0 0
2 37.1778 510.186 15.7654 14.1712 41.9517
3 37.3374 510.321 30.3164 27.2509 41.9518
4 37.497 510.458 43.6078 39.1983 41.9518
5 37.6567 510.596 55.5949 49.9732 41.9518
6 37.8163 510.736 66.2338 59.5364 41.9518
7 37.9759 510.878 75.4815 67.849 41.9518
8 38.1355 511.022 83.2958 74.8731 41.9518
9 38.2951 511.167 89.6352 80.5715 41.9518
10 38.4547 511.315 94.4591 84.9076 41.9518
11 38.6144 511.464 97.7278 87.8458 41.9518
12 38.774 511.615 99.4023 89.351 41.9518
13 38.9336 511.768 99.4448 89.3892 41.9518
14 39.0932 511.923 97.8181 87.927 41.9518
15 39.2528 512.08 94.4863 84.9321 41.9518
16 39.4124 512.239 89.4142 80.3729 41.9518
17 39.572 512.401 82.5679 74.2188 41.9518
18 39.7317 512.564 73.9144 66.4403 41.9518
19 39.8913 512.73 63.4219 57.0088 41.9518
20 40.0509 512.898 51.1651 45.9914 41.9518
21 40.2105 513.068 38.6261 34.7204 41.9519
22 40.3701 513.24 26.3196 23.6582 41.9518
23 40.5297 513.415 14.2802 12.8362 41.9518
24 40.6894 513.593 2.54378 2.28656 41.9518
25 40.849 513.773 -8.85317 -7.95796 41.9518
26 41.0086 513.955 -19.8731 -17.8636 41.9518
27 41.1682 514.14 -30.4777 -27.3959 41.9518
28 41.3278 514.328 -40.6274 -36.5193 41.9519
29 41.4874 514.519 -50.2819 -45.1975 41.9518
30 41.647 514.712 -59.3999 -53.3935 41.9518
31 41.8067 514.908 -67.9388 -61.069 41.9518
32 41.9663 515.108 -75.8552 -68.1849 41.9518
33 42.1259 515.31 -83.1047 -74.7014 41.9518
34 42.2855 515.516 -89.6003 -80.5401 41.9518
35 42.4451 515.725 -95.076 -85.4622 41.9518
36 42.6047 515.937 -99.4471 -89.3912 41.9518
37 42.7643 516.153 -102.659 -92.2783 41.9518
38 42.924 516.372 -104.656 -94.0738 41.9519
39 43.0836 516.595 -105.384 -94.7275 41.9517
40 43.2432 516.822 -104.784 -94.1887 41.9519
41 43.4028 517.053 -102.801 -92.4064 41.9519
42 43.5624 517.288 -99.3781 -89.3292 41.9518
43 43.722 517.527 -94.4573 -84.906 41.9518
44 43.8817 517.771 -87.9821 -79.0855 41.9518
45 44.0413 518.019 -79.8962 -71.8173 41.9518
46 44.2009 518.272 -70.1443 -63.0515 41.9518
47 44.3605 518.53 -58.6726 -52.7398 41.9518
48 44.5201 518.793 -45.4292 -40.8355 41.9518
49 44.6797 519.062 -30.365 -27.2946 41.9519
50 44.8393 519.336 -13.4347 -12.0762 41.9518
51 44.999 519.617 0 0 0
16/18
Thursday, July 18, 20242940 Cacatua Street
Global Minimum Query (gle/morgenstern-price) - Safety Factor: 1.44972
Slice Number X coordinate [ft]Y coordinate - Bottom
[ft]
Interslice Normal Force
[lbs]
Interslice Shear Force
[lbs]
Interslice Force Angle
[deg]
1 37.0182 510.053 0 0 0
2 37.1778 510.186 18.7186 1.52664 4.66257
3 37.3374 510.321 35.3902 5.76128 9.24625
4 37.497 510.458 50.0413 12.1794 13.6791
5 37.6567 510.596 62.7077 20.2558 17.9015
6 37.8163 510.736 73.4319 29.4739 21.8694
7 37.9759 510.878 82.2608 39.333 25.5548
8 38.1355 511.022 89.2438 49.3552 28.9443
9 38.2951 511.167 94.4314 59.0896 32.0359
10 38.4547 511.315 97.8738 68.1178 34.837
11 38.6144 511.464 99.6202 76.0564 37.3604
12 38.774 511.615 99.7188 82.561 39.6227
13 38.9336 511.768 98.2163 87.3287 41.6418
14 39.0932 511.923 95.1585 90.1003 43.436
15 39.2528 512.08 90.5895 90.6625 45.0231
16 39.4124 512.239 84.5524 88.8491 46.4194
17 39.572 512.401 77.0877 84.5407 47.6401
18 39.7317 512.564 68.2328 77.6639 48.6986
19 39.8913 512.73 58.0198 68.1885 49.6064
20 40.0509 512.898 46.5669 56.2375 50.3739
21 40.2105 513.068 35.2208 43.5086 51.0094
22 40.3701 513.24 24.3984 30.695 51.52
23 40.5297 513.415 14.0719 17.954 51.9115
24 40.6894 513.593 4.20536 5.4192 52.1881
25 40.849 513.773 -5.24502 -6.79923 52.3529
26 41.0086 513.955 -14.3296 -18.6125 52.4076
27 41.1682 514.14 -23.1036 -29.9497 52.3529
28 41.3278 514.328 -31.6242 -40.7522 52.1881
29 41.4874 514.519 -39.9476 -50.9681 51.9115
30 41.647 514.712 -48.1249 -60.5448 51.5201
31 41.8067 514.908 -56.1984 -69.4225 51.0094
32 41.9663 515.108 -64.1972 -77.529 50.3738
33 42.1259 515.31 -72.133 -84.7753 49.6064
34 42.2855 515.516 -79.9608 -91.013 48.6986
35 42.4451 515.725 -87.4502 -95.9051 47.6402
36 42.6047 515.937 -94.4903 -99.2921 46.4195
37 42.7643 516.153 -100.965 -101.047 45.0233
38 42.924 516.372 -106.728 -101.055 43.4361
39 43.0836 516.595 -111.603 -99.2318 41.6419
40 43.2432 516.822 -115.389 -95.5349 39.6226
41 43.4028 517.053 -117.858 -89.9804 37.3604
42 43.5624 517.288 -118.763 -82.6559 34.8369
43 43.722 517.527 -117.831 -73.7317 32.0359
44 43.8817 517.771 -114.765 -63.4696 28.9443
45 44.0413 518.019 -109.233 -52.2297 25.5548
46 44.2009 518.272 -100.849 -40.4784 21.8694
47 44.3605 518.53 -89.1551 -28.7988 17.9014
48 44.5201 518.793 -73.5837 -17.9093 13.6791
49 44.6797 519.062 -53.412 -8.69511 9.24625
50 44.8393 519.336 -27.7026 -2.25936 4.66259
51 44.999 519.617 0 0 0
17/18
Thursday, July 18, 20242940 Cacatua Street
Discharge Sections
Entity Information
External Boundary
X Y
0 510
0 480
80 480
80 520
54.2 520
42.2 519.5
40 518.75
37 510
35 510
35 508.5
33.5 508.5
33.5 510
20 510
Material Boundary
X Y
20 510
20 508.5
33.5 508.5
Material Boundary
X Y
35 508.5
37 508.5
37 510
18/18
Thursday, July 18, 20242940 Cacatua Street