6_Gustin_Levee_Geotechnical_Report_7-23-15
GEOTECHNICAL EVALUATION
GUSTIN LEVEE EVALUATION
PARCEL NO. 45344.9108
SPOKANE COUNTY, WASHINGTON
Inland Pacific Engineering Company Project No. 14-037B
July 23, 2015
IPEC
Inland Pacific Engineering Company
Geotechnical Engineering and Consulting
GEOTECHNICAL EVALUATION
GUSTIN LEVEE EVALUATION
PARCEL NO. 45344.9108
SPOKANE COUNTY, WASHINGTON
Inland Pacific Engineering Company Project No. 14-037B
July 23, 2015
Prepared for:
NAI Black
Spokane, Washington
IPEC
Inland Pacific Engineering Company
Geotechnical Engineering and Consulting
TABLE OF CONTENTS
Project No. 14-037B
Gustin Levee Evaluation
Parcel No. 45344.9108
Spokane County, Washington
page
1.0 INTRODUCTION ................................................................................................................ 1
1.1 Project Description .................................................................................................... 1
1.2 Purpose ...................................................................................................................... 1
1.3 Scope ......................................................................................................................... 1
1.4 Available Information ............................................................................................... 1
1.5 Locations and Elevations .......................................................................................... 1
2.0 RESULTS .............................................................................................................................. 2
2.1 Logs........................................................................................................................... 2
2.2 Site Conditions .......................................................................................................... 2
2.3 Soils........................................................................................................................... 2
2.4 Penetration Resistances ............................................................................................. 3
2.5 Groundwater ............................................................................................................. 3
2.6 Laboratory Testing .................................................................................................... 3
3.0 ANALYSIS AND RECOMMENDATIONS ......................................................................... 3
3.1 Discussion ................................................................................................................. 3
3.2 History....................................................................................................................... 3
3.3 Freeboard .................................................................................................................. 3
3.4 Closures..................................................................................................................... 4
3.5 Embankment Protection ............................................................................................ 4
3.6 Embankment and Foundation Stability ..................................................................... 4
3.7 Settlement ................................................................................................................. 5
3.8 Interior Drainage ....................................................................................................... 5
3.9 Operation Plans ......................................................................................................... 5
3.10 Maintenance Plan .................................................................................................... 5
4.0 PROCEDURES ..................................................................................................................... 6
4.1 Excavation and Sampling ......................................................................................... 6
4.2 Soil Classification ..................................................................................................... 6
5.0 GENERAL RECOMMENDATIONS.................................................................................... 6
5.1 Basis of Recommendations ....................................................................................... 6
5.2 Groundwater Fluctuations ......................................................................................... 6
5.3 Use of Report ............................................................................................................ 6
5.4 Level of Care............................................................................................................. 7
5.5 Professional Certification .......................................................................................... 7
Appendix A – Site Location Map, NRCS Map, Boring and Test Pit Location Map
Appendix B – Logs of Borings, Logs of Test Pits, Descriptive Terminology
Appendix C – Laboratory Test Results
1.0 INTRODUCTION
1.1 Project Description
We understand that the proposed Painted Hills project may consist of a residential development.
The site consists of 91 acres currently developed as a golf course. Stormwater runoff will be treated
using drywells and/or gravel galleries for subsurface infiltration. These type of facilities will also be
used to manage potential floodwaters, if needed. In addition, runoff from the drainage east of the
site will require a FEMA certified levee. The existing levee is located on the Gustin property off
State Highway 27.
1.2 Purpose
The purpose of our services is to evaluate the existing levee for conformance to 44 CFR 65.10 of
the Code of Federal Regulations for certification by the Federal Emergency Management
Agency (FEMA).
1.3 Scope
Our services were requested by Mr. Bryan Walker of NAI Black. Mr. Walker authorized us to
proceed on April 28, 2015. The scope of work agreed upon consisted of the following:
review of existing geotechnical data and reports for the development, if available
drill 8 penetration test borings at the site to a depth of 15 feet,
excavate 6 test pits through the existing levee embankment,
performing laboratory tests on samples obtained from the test pits,
classifying the soils and preparing boring logs, and
submitting a geotechnical report containing logs of the borings, results of our field
investigation and laboratory testing, and our analyses, opinions, and recommendations
relative to the conformance of the existing levee to FEMA standards.
1.4 Available Information
We were provided a topographic survey for the project site by WCE. This topographic survey
showed the existing roadways, existing structures, property lines, and existing ground surface
elevation contours. This plan was prepared by WCE and was not dated.
We also performed a preliminary geotechnical evaluation for the golf course property in December
2013. The results of that evaluation, along with our opinions and recommendations, are
summarized in our Preliminary Geotechnical Evaluation dated December 31, 2013.
In conjunction with this evaluation, West Consultants, Inc. (WEST) has been contracted by NAI
Black to provide a FEMA Conditional Letter of Map Revision submittal (CLOMR). They have
provided Inland Pacific Engineering Company (IPEC) water surface elevations and velocity output
from their revised RAS model to assist us in our evaluation.
1.5 Locations and Elevations
The borings and test pits were drilled and/or excavated at or near locations selected by us. The
boring and test pit locations are shown on the Boring Location Map in Appendix A. The borings
Geotechnical Evaluation Project No. 14-037
Gustin Property Levee Parcel No. 45344.9108
Spokane County, WA July 23, 2015
Inland Pacific Engineering Company Page 2
were staked by Whipple Consulting Engineers, Inc. (WCE). The test pits were staked by IPEC.
Ground surface elevations at the borings were provided by WCE. Ground surface elevations at
the test pits were interpolated from the topographic survey provided by WCE.
2.0 RESULTS
2.1 Logs
Log of Boring and Log of Test Pit sheets indicating the vertical sequence of soils and materials
encountered and groundwater observations are included in Appendix B. The strata changes were
inferred from the changes in the penetration test samples and auger cuttings brought to the
surface or measured from the surface in the test pits. Please note that the depths shown as
changes between the strata are only approximate. The changes are likely transitions and the
depths of changes vary between the borings. Geologic origins for each stratum are based on the
soil type, available geologic maps, previous geotechnical reports for this and adjacent sites, and
available common knowledge of the depositional history of the site.
2.2 Site Conditions
The site is an open field with no trees and is primarily grass-covered with scattered trees along the
fairways and pine trees in the undeveloped area to the northwest. The existing levee extends from
the culvert under State Highway 27 on the east side of the property and extends west to the west
side of the parcel. The creek side of the levee is typically at a 1.5:1 to 1:1 (H:V) slope. The land
side of the levee is typically at a 2.5:1 to 1.5:1 slope. There are two existing crossings where the
levee embankment is not present. The crossings consist of embankments with culverts.
2.3 Soils
Geologic maps indicate the soils in this area consist primarily of alluvial and/or glacially
deposited silts, clays, sands, and gravels. According to the Soil Survey of Spokane County, the
site soils are classified by the Natural Resource Conservation Service (NRCS) as Hardesty ashy
silt loam and Urban land-Springdale, disturbed complex. The native soils encountered in the
borings and test pits were consistent with the NRCS data.
The borings encountered approximately 1 foot of topsoil at the surface. Below the topsoil, the
borings encountered alluvial or glacial silty to clayey sands and/or poorly graded sands to their
termination depths. Borings B-1 and B-3 encountered silty clay between the 4 and 9-foot depths.
The test pits were excavated through the existing levee embankment. They encountered existing fill
in the upper 4 to 5½ feet. The embankment fill consisted primarily of silty sand. Below the fill, the
test pits encountered alluvial or glacial silty to clayey sands and/or gravels to their termination
depths.
Geotechnical Evaluation Project No. 14-037
Gustin Property Levee Parcel No. 45344.9108
Spokane County, WA July 23, 2015
Inland Pacific Engineering Company Page 3
2.4 Penetration Resistances
Penetration resistances (N-values) in the sands and gravels ranged from 6 to 59 blows per foot
(BPF) and averaged 23 BPF indicating that these soils were loose to very dense, but were typically
medium dense. Penetration resistances in the clays ranged from 8 to 18 BPF indicating they were
medium to very stiff in consistency.
2.5 Groundwater
Groundwater was not encountered in the borings or test pits. Groundwater is believed to currently
exist at some depth below the termination depths of the borings and test pits. Well log data in the
vicinity of the site indicate that groundwater is typically 50 to 80 feet below the surface.
2.6 Laboratory Testing
We obtained soil samples from the borings during our site investigation. The tests performed
included the following:
1. ASTM D 6913, Sieve Analysis
2. ASTM D 4318, Atterberg Limits’
These tests were used to aid in classifying the soils and in the engineering analyses and formulation
of engineering opinions and recommendations. The tests were performed by IPEC. Attached are
data sheets summarizing the tests performed.
3.0 ANALYSIS AND RECOMMENDATIONS
3.1 Discussion
Based on the results of the borings and test pits, along with topographic data from WCE, the
existing levee will need significant modification in order to meet the FEMA standard. At this
time, we understand that the existing crossings will be removed. As such, additional freeboard
will not be required at these locations. The sideslopes of the levee will need to be sloped flatter
to maintain slope stability during flooding. In addition, the crown will need to be widened. It is
our opinion that the levee embankment materials are suitable but will need to be re-worked to
provide adequate flood protection. In summary, the levee as it exists cannot be certified at this
time.
3.2 History
The levee was constructed prior to 1945, when the Gustin family purchased the land. As such,
design plans or as-built drawings are not available. However, an as-built survey was completed
by WCE in 2015.
3.3 Freeboard
We were provided 100-year flood elevations by WEST. They provided us a plan view of the
levee with flood elevations at 9 locations starting at the culvert on State Highway 27 and ending
Geotechnical Evaluation Project No. 14-037
Gustin Property Levee Parcel No. 45344.9108
Spokane County, WA July 23, 2015
Inland Pacific Engineering Company Page 4
at the proposed triangle stormwater pond north of 40th Avenue west of the Gustin property. The
elevations ranged from 2020.02 at State Highway 27 to 2008.85 at the triangle pond. Please
refer to the WEST report for a complete summary of the floodplain analysis.
According to 44 CFR Section 65.10(b)(1), an additional 1 foot of freeboard is required within
100 feet of bridge structures. This will require the top of the levee to be at elevation 2024.02 at
the State Highway 27 crossing and extending 100 feet west. Since the existing levee is at
approximately elevation 2020 in this area, it will need additional fill to meet the minimum
freeboard requirements.
3.4 Closures
There are no penetrations of the levee so closure devices are not required.
3.5 Embankment Protection
The levee is currently grass-covered for erosion protection. We evaluated the erosion protection
for the creek side of the levee using the results of the HEC-RAS analysis by WEST. They
provided flow velocities for the 100-year flood event. The flow velocities are shown in the
following table.
FEMA FIS Station 100-year Channel
Velocity (ft/sec)
1962.72 3.71
2027.72 2.67
2295.08 1.26
2848.82 4.34
2886.75 2.15
2904.75 0.91
2933.32 1.33
3338.84 2.30
3364.84 2.11
As shown in the table, the average flow velocity is typically less than 3 feet per second. At these
velocities, it is our opinion that the vegetative erosion protection is adequate for levee slope
protection.
3.6 Embankment and Foundation Stability
We evaluated the embankment and foundation stability for conditions described in EM 1110-2-
1913, “Design and Construction of Levees, by the US Corps of Engineers dated April 30, 2000,
Chapter 6. We analyzed the existing levee embankment for the following cases:
1. CASE I, End of construction.
2. CASE II: Sudden drawdown.
3. CASE III: Steady state seepage from full flood stage.
Geotechnical Evaluation Project No. 14-037
Gustin Property Levee Parcel No. 45344.9108
Spokane County, WA July 23, 2015
Inland Pacific Engineering Company Page 5
We performed slope stability analyses for each case. We analyzed the levee embankment with 1:1
slopes. This configuration is considered to have the lowest factor of safety. For our analyses, we
used XSTABL software which is based on a software program developed at Purdue University.
For these cases, we calculated the minimum factors of safety as shown in the following table.
CASE Minimum Factor of Safety
I 1.03
II 0.92
III 0.50
For stability, a minimum factor of safety of 1.5 is generally considered acceptable. Based on this
analysis, it is our opinion that the levee will not be stable with respect to global slope stability with
its current geometry.
We recommend that the levee be improved to have maximum 3:1 (H:V) slopes for stability. We
recommend a minimum crown width of 8 feet. We recommend that the levee embankment
materials consist of a granular soil having 10 to 30 percent by weight passing a 200 sieve to
reduce the permeability and limit seepage. We have assumed that on-site soils will be used as
borrow to construct the embankment.
3.7 Settlement
The average depth of fill is approximately 5 feet. This would result in a loading increase of
approximately 625 pounds per square foot (psf) on the bearing soils. Based on the data obtained
from the borings, the levee was constructed above medium dense sands. Settlement in these
soils would have occurred shortly after construction. Also, given the age of the levee, it is our
opinion that significant additional long term settlement will not occur even with addition of 1 to
2 feet in areas requiring additional fill to meet the freeboard requirements.
3.8 Interior Drainage
Interior drainage systems have been designed by WCE. We understand that these systems will
include the proposed triangle stormwater pond with multiple drywells to control flood waters and
infiltrate them into the ground. Please refer to the WCE report for a comprehensive description
of the interior drainage system.
3.9 Operation Plans
The Operation Plan will be prepared as part of the final levee certification.
3.10 Maintenance Plan
The Maintenance Plan will be prepared as part of the final levee certification.
Geotechnical Evaluation Project No. 14-037
Gustin Property Levee Parcel No. 45344.9108
Spokane County, WA July 23, 2015
Inland Pacific Engineering Company Page 6
4.0 PROCEDURES
4.1 Excavation and Sampling
The borings were completed on July 13 and 14, 2015 using a truck-mounted drill rig operated by
an independent firm working under subcontract to IPEC. After we logged the borings, they were
abandoned in accordance with state requirements. The test pits were excavated on July 21, 2015
using a rubber-tired backhoe operated by an independent firm working under subcontract to
IPEC. After we logged the test pits, the test pits were backfilled. A geotechnical engineer from
our firm continuously observed the borings and test pits and logged the surface and subsurface
conditions.
4.2 Soil Classification
The soils encountered in the borings were visually and manually classified in the field by our field
personnel in accordance with ASTM D 2488, “Description and Identification of Soils (Visual-
Manual Procedures)”.
5.0 GENERAL RECOMMENDATIONS
5.1 Basis of Recommendations
The analyses and recommendations submitted in this report are based on the data obtained from
the borings and test pits performed at the locations indicated on the Boring and Test Pit Location
Map in Appendix A. It should be recognized that the explorations performed for this evaluation
reveal subsurface conditions only at discreet locations across the project site and that actual
conditions in other areas could vary. Furthermore, the nature and extent of any such variations
would not become evident until additional explorations are performed or until construction activities
have begun. If significant variations are observed at that time, we may need to modify our
conclusions and recommendations contained in this report to reflect the actual site conditions.
5.2 Groundwater Fluctuations
We made water level observations in the borings and test pits at the times and conditions stated on
the boring and test pit logs. These data were interpreted in the text of this report. The period of
observation was relatively short and fluctuation in the groundwater level may occur due to rainfall,
flooding, irrigation, spring thaw and other seasonal and annual factors not evident at the time the
observations were made. Design drawings and specifications and construction planning should
recognize the possibility of fluctuations.
5.3 Use of Report
This report is for the exclusive use of the addressee and the copied parties to use in design of the
proposed project and to prepare construction documents. In the absence of our written approval, we
make no representations and assume no responsibility to other parties regarding this report. The
data, analyses, and recommendations may not be appropriate for other structures or purposes. We
recommend that parties contemplating other structures or purposes contact us.
APPENDIX A
SITE LOCATION MAP, NRCS MAP, BORING AND TEST
PIT LOCATION MAP
FIGURE 1 Site Location Map Project No. 14-037B July 22, 2015 Gustin Levee Parcel No. 45344.9108 Spokane County, WA
FIGURE 2 NRCS Map Project No. 14-037B July 22, 2015 Gustin Levee Parcel No. 45344.9108 Spokane County, WA
FIGURE 3 Boring Location Map Project No. 14-037B July 22, 2015 Gustin Levee Parcel No. 45344.9108 Spokane County, WA
APPENDIX B
LOGS OF BORINGS, LOGS OF TEST PITS, DECRIPTIVE
TERMINOLOGY
SS
SS
SS
SS
SS
5-4(9)
4-4(8)
6-8(14)
12-13(25)
14-15(29)
21 24 20 4 774
(SM) SILTY SAND, fine grained, with roots, dark brown, moist.
(Topsoil)
(SM) SILTY SAND, fine to medium grained, brown, moist, loose.
(Alluvium)
(CL-ML) SANDY SILTY CLAY, brown, moist to wet, medium tostiff.(Alluvium)
(SM) SILTY SAND, fine to medium grained, a trace of Gravel,brown, moist, medium dense.(Alluvium)
(SM) SILTY SAND with GRAVEL, medium to coarse grained,brown, moist to wet, medium dense.
(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2010.8 ft
LOGGED BY DD
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/13/15 COMPLETED 7/13/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-1
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:32 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
3-3(6)
7-8(15)
6-8(14)
5-8(13)
15-11(26)
34
6
(SM) SILTY SAND, fine grained, with roots, dark brown, moist.
(Topsoil)
(SM) SILTY SAND, fine to medium grained, brown, moist, loose to
medium dense.(Alluvium)
(SP) POORLY GRADED SAND with GRAVEL, medium to coarsegrained, brown, moist, medium dense.
(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2010.7 ft
LOGGED BY DD
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/13/15 COMPLETED 7/13/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-2
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:32 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
3-3(6)
8-10(18)
7-6(13)
7-9(16)
9-9(18)
17 23 19 4 62
8
4
(SM) SILTY SAND, fine grained, with roots, dark brown, moist.
(Topsoil)
(SM) SILTY SAND, very fine to fine grained, brown, moist, loose.
(Alluvium)
(CL-ML) SANDY SILTY CLAY, brown, moist to wet, very stiff.(Alluvium)
(SP-SM) POORLY GRADED SAND with SILT, medium to coarsegrained, a trace of Gravel, brown, moist, medium dense.
(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2012.4 ft
LOGGED BY DD
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/13/15 COMPLETED 7/13/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-3
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:32 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
4-4(8)
10-9(19)
6-7(13)
20-21(41)
13-13(26)
36
4
(SM) SILTY SAND, fine grained, with roots, dark brown, moist.
(Topsoil)
(SM) SILTY SAND, fine to medium grained, brown, moist, loose.
(Alluvium)
(SP) POORLY GRADED SAND with GRAVEL, medium to coarsegrained, brown, moist, medium dense to dense.(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2013 ft
LOGGED BY DD
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/13/15 COMPLETED 7/13/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-4
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:32 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
11-10(21)
15-10(25)
5-6(11)
6-9(15)
13-17(30)
8
(SM) SILTY SAND, fine to mediium grained, with roots, dark
brown, moist.(Topsoil)
(SM) SILTY SAND with GRAVEL, fine to medium grained, brown,
moist, medium dense.(Glacial Outwash)
(SP-SM) POORLY GRADED SAND with SILT and GRAVEL,
medium to coarse grained, brown, moist, medium dense.(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2013.9 ft
LOGGED BY SLN
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/14/15 COMPLETED 7/14/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-5
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:32 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
16-16(32)
7-15(22)
43-15(58)
17-16(33)
12-12(24)
(SM) SILTY SAND, fine to mediium grained, with roots, dark
brown, moist.(Topsoil)
(SM) SILTY SAND with GRAVEL, fine to coarse grained, brown,
moist, dense to medium dense.(Glacial Outwash)
(SP) POORLY GRADED SAND with GRAVEL, medium to coarse
grained, brown, moist,very dense to medium dense.(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2015.1 ft
LOGGED BY SLN
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/14/15 COMPLETED 7/14/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-6
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:33 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
5-13(18)
24-18(42)
25-16(41)
8-15(23)
50
(SM) SILTY SAND, fine to mediium grained, with roots, dark
brown, moist.(Topsoil)
(SM) SILTY SAND with GRAVEL, fine to coarse grained, brown,
moist, medium dense.(Glacial Outwash)
(SP) POORLY GRADED SAND with GRAVEL, medium to coarsegrained, brown, moist, dense to very dense.(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2015.9 ft
LOGGED BY SLN
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/14/15 COMPLETED 7/14/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-7
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:33 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
SS
SS
SS
SS
SS
9-8(17)
5-7(12)
7-7(14)
20-19(39)
27-32(59)
7
(SM) SILTY SAND, fine to mediium grained, with roots, dark
brown, moist.(Topsoil)
(SM) SILTY SAND with GRAVEL, fine to coarse grained, brown,
moist, medium dense.(Glacial Outwash)
(GP-GM) POORLY GRADED GRAVEL with SILT and SAND, finegrained, brown, moist, dense to very dense.(Glacial Outwash)
End of boring.
Groundwater not encountered with 14' of hollow-stem auger in theground.
Groundwater not encountered immediately after withdrawal of theauger.
Bore hole then grouted to the surface.
NOTES
GROUND ELEVATION 2020 ft
LOGGED BY SLN
DRILLING METHOD Hollow Stem Auger
DRILLING CONTRACTOR Johnson Exploration Drilling GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/14/15 COMPLETED 7/14/15
AT TIME OF DRILLING --- Not encountered
AT END OF DRILLING --- Not encountered
AFTER DRILLING --- Not encountered
HOLE SIZE 8 inches
SAMPLE TYPENUMBERRECOVERY %(RQD)BLOWCOUNTS(N VALUE)DRY UNIT WT.(pcf)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITPLASTICITYINDEXFINES CONTENT(%)ATTERBERGLIMITS
PLASTICITYINDEXGRAPHICLOGDEPTH(ft)0
5
10
15 POCKET PEN.(tsf)MATERIAL DESCRIPTION
PAGE 1 OF 1
BORING NUMBER B-8
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
IPEC BORING LOG - GINT STD US LAB.GDT - 7/23/15 15:33 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
2011.0
2009.0
MC = 16%Fines = 44%
SM
SC-
SM
5.0
7.0
(SM) FILL: Silty Clayey Sand, fine grained, a trace of fibers, brown,moist.
(SC-SM) SILTY CLAYEY SAND, fine grained, brown, moist.(Alluvium)
End of test pit.
Groundwater not encountered
Test pit immediately backfilled.
NOTES
GROUND ELEVATION 2016 ft
LOGGED BY PTN
EXCAVATION METHOD Backhoe
EXCAVATION CONTRACTOR Alpine Excavating GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/21/15 COMPLETED 7/21/15
AT TIME OF EXCAVATION --- Not encountered
AT END OF EXCAVATION --- Not encountered
AFTER EXCAVATION --- Not encountered
TEST PIT SIZE 30 inches
SAMPLE TYPENUMBERDEPTH(ft)0.0
2.5
5.0
PAGE 1 OF 1
TEST PIT NUMBER TP-1
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GENERAL BH / TP / WELL - GINT STD US LAB.GDT - 7/23/15 15:54 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
TESTS
U.S.C.S.GRAPHICLOGMATERIAL DESCRIPTION
2012.0
2008.0
SM
SM
4.0
8.0
(SM) FILL: Silty Sand, fine to medium grained, brown, moist.
(SM) SILTY SAND, fine to medium grained, brown, moist.
(Alluvium)
End of test pit.
Groundwater not encountered
Test pit immediately backfilled.
NOTES
GROUND ELEVATION 2016 ft
LOGGED BY PTN
EXCAVATION METHOD Backhoe
EXCAVATION CONTRACTOR Alpine Excavating GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/21/15 COMPLETED 7/21/15
AT TIME OF EXCAVATION --- Not encountered
AT END OF EXCAVATION --- Not encountered
AFTER EXCAVATION --- Not encountered
TEST PIT SIZE 30 inches
SAMPLE TYPENUMBERDEPTH(ft)0.0
2.5
5.0
7.5
PAGE 1 OF 1
TEST PIT NUMBER TP-2
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GENERAL BH / TP / WELL - GINT STD US LAB.GDT - 7/23/15 15:54 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
U.S.C.S.GRAPHICLOGMATERIAL DESCRIPTION
2009.5
2008.0
MC = 6%
Fines = 22%
SM
SM
5.5
7.0
(SM) FILL: Silty Sand with Gravel, fine to medium grained, brown,moist.
(SM) SILTY SAND, fine to coarse grained, a trace of Gravel, brown,
moist.(Glacial Outwash)
End of test pit.
Groundwater not encountered
Test pit immediately backfilled.
NOTES
GROUND ELEVATION 2015 ft
LOGGED BY PTN
EXCAVATION METHOD Backhoe
EXCAVATION CONTRACTOR Alpine Excavating GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/21/15 COMPLETED 7/21/15
AT TIME OF EXCAVATION --- Not encountered
AT END OF EXCAVATION --- Not encountered
AFTER EXCAVATION --- Not encountered
TEST PIT SIZE 30 inches
SAMPLE TYPENUMBERDEPTH(ft)0.0
2.5
5.0
PAGE 1 OF 1
TEST PIT NUMBER TP-3
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GENERAL BH / TP / WELL - GINT STD US LAB.GDT - 7/23/15 15:54 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
TESTS
U.S.C.S.GRAPHICLOGMATERIAL DESCRIPTION
2012.0
2010.0
SM
SM
5.0
7.0
(SM) FILL: Silty Sand with Gravel, fine to coarse grained, brown, moist.
(SM) SILTY SAND with GRAVEL, fine to coarse grained, brown, moist.(Glacial Outwash)
End of test pit.
Groundwater not encountered
Test pit immediately backfilled.
NOTES
GROUND ELEVATION 2017 ft
LOGGED BY PTN
EXCAVATION METHOD Backhoe
EXCAVATION CONTRACTOR Alpine Excavating GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/21/15 COMPLETED 7/21/15
AT TIME OF EXCAVATION --- Not encountered
AT END OF EXCAVATION --- Not encountered
AFTER EXCAVATION --- Not encountered
TEST PIT SIZE 30 inches
SAMPLE TYPENUMBERDEPTH(ft)0.0
2.5
5.0
PAGE 1 OF 1
TEST PIT NUMBER TP-4
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GENERAL BH / TP / WELL - GINT STD US LAB.GDT - 7/23/15 15:54 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
U.S.C.S.GRAPHICLOGMATERIAL DESCRIPTION
2016.0
2014.0
MC = 7%Fines = 48%
SM
SM
5.0
7.0
(SM) FILL: Silty Sand, fine grained, brown, moist.
(SM) SILTY SAND with GRAVEL, fine to coarse grained, brown, moist.(Glacial Outwash)
End of test pit.
Groundwater not encountered
Test pit immediately backfilled.
NOTES
GROUND ELEVATION 2021 ft
LOGGED BY PTN
EXCAVATION METHOD Backhoe
EXCAVATION CONTRACTOR Alpine Excavating GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/21/15 COMPLETED 7/21/15
AT TIME OF EXCAVATION --- Not encountered
AT END OF EXCAVATION --- Not encountered
AFTER EXCAVATION --- Not encountered
TEST PIT SIZE 30 inches
SAMPLE TYPENUMBERDEPTH(ft)0.0
2.5
5.0
PAGE 1 OF 1
TEST PIT NUMBER TP-5
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GENERAL BH / TP / WELL - GINT STD US LAB.GDT - 7/23/15 15:54 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
TESTS
U.S.C.S.GRAPHICLOGMATERIAL DESCRIPTION
2016.0
2014.0
Fines = 25%
SM
GM
5.0
7.0
(SM) FILL: Silty Sand with Gravel, fine to coarse grained, brown, moist.
(GM) SILTY GRAVEL with SAND, fine to coarse grained, brown, moist.(Glacial Outwash)
End of test pit.
Groundwater not encountered
Test pit immediately backfilled.
NOTES
GROUND ELEVATION 2021 ft
LOGGED BY PTN
EXCAVATION METHOD Backhoe
EXCAVATION CONTRACTOR Alpine Excavating GROUND WATER LEVELS:
CHECKED BY PTN
DATE STARTED 7/21/15 COMPLETED 7/21/15
AT TIME OF EXCAVATION --- Not encountered
AT END OF EXCAVATION --- Not encountered
AFTER EXCAVATION --- Not encountered
TEST PIT SIZE 30 inches
SAMPLE TYPENUMBERDEPTH(ft)0.0
2.5
5.0
PAGE 1 OF 1
TEST PIT NUMBER TP-6
CLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GENERAL BH / TP / WELL - GINT STD US LAB.GDT - 7/23/15 15:54 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
TESTS
U.S.C.S.GRAPHICLOGMATERIAL DESCRIPTION
DENSITY
Very Loose 0 - 4
Loose 4 - 10
Coarse-Gravel and Gravel GW
Grained Gravelly Soils (with little or no fines)GP
Soils <50% coarse fraction Gravel GM
passes #4 sieve (with >12% fines)GC
<50% Sandy and Sand SW
passes #200 Sandy Soils (with little or no fines)SP
sieve >50% coarse fraction Sand SM
passes #4 sieve (with >12% fines)SC
Fine-ML
Grained CL
Soils OL
>50% MH
passes #200 CH
sieve OH
PT Peat
DESCRIPTION RANGE
Occasional <5%
Trace 5% - 12%
With >12%
Coarse Fine Coarse Medium Fine
MODIFIERS
Hard > 30
USCS SOIL CLASSIFICATION
Liquid Limit > 50
Highly Organic Soils
Silt and Clay
MAJOR DIVISIONS
Liquid Limit < 50
Salt and Clay
Organic Clay and Silt (med to high plasticity)
Muck
Well Graded Sand
Inorganic Silt
Fat Clay
MOISTURE CONTENT
Gravel SandBoulders Cobbles
GRAIN SIZE (INCHES)
Silt and Clay
12 3 0.75 0.19 0.079 0.0171 0.0029
17 - 30
Soft
Rather Soft
Medium
Rather Stiff
Stiff
Very Stiff
2 - 3
4 - 5
6 - 8
9 - 12
RELATIVE DENSITY OR CONSISTENCY VERSUS SPT N-VALVE
FINE-GRAINED SOILS
N(BLOWS/FT) CONSISTENCY N(BLOWS/FT)
Very Soft 0 - 1
MAJOR DIVISIONS WITH GRAIN SIZE
SIEVE SIZE
12" 3" 3/4" 4 10 40 200
COARSE-GRAINED SOILS
Poorly Graded Sand
Silty Sand
Clayey Sand
Silt
Lean Clay
Organic Silt and Clay (low plasticity)
GROUP DESCRIPTIONS
Well Graded Gravel
Poorly Graded Gravel
Silty Gravel
Clayey Gravel
13 - 16
FIELD OBSERVATION
Absence of moisture, dusty, dry to the touch
Dry of optimum moisture content
Wet of optimum moisture content
DESCRIPTION
Dry
Moist
Wet
Very Dense > 50
Dense 31 - 50
Medium-Dense 11 - 30
APPENDIX C
LABORATORY TEST RESULTS
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.0010.010.1110100
PI Cc
20
19
24
23
CuLLPL
12.01
7.85
1.39
1.48
4
4
GRAIN SIZE DISTRIBUTION
COBBLES GRAVEL
77.0
34.2
6.1
61.7
7.8
0.075
9.5
19
0.075
15.9
SAND
GRAIN SIZE IN MILLIMETERS
coarse fine
CL-ML Sandy Silty Clay
SM Silty Sand
SP-SM Poorly Graded Sand with Silt and Gravel
CL-ML Sandy Silty Clay
SP-SM Poorly Graded Sand with Silt
Classification
D100 D60 D30 D10 %Gravel
0.411
4.142
1.234
B-1
B-2
B-2
B-3
B-3
coarse SILT OR CLAYfinemedium
5.0
7.5
15.0
5.0
10.0
%Sand %Silt %Clay
1.408
0.537
0.345
0.157
1.9
35.7
12.8
63.9
58.2
79.4
BOREHOLE DEPTH
BOREHOLE DEPTH
3 100
B-1
B-2
B-2
B-3
B-3
24 16 301 200610501/2 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403420406601.5 8 143/4 3/8
5.0
7.5
15.0
5.0
10.0PERCENT FINER BY WEIGHTCLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GRAIN SIZE - GINT STD US LAB.GDT - 7/23/15 15:31 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.0010.010.1110100
PI Cc CuLLPL
6.63
13.93
20.18
0.45
2.37
2.50
GRAIN SIZE DISTRIBUTION
COBBLES GRAVEL
36.1
4.4
7.8
6.8
44.0
9.5
12.5
25
25
9.5
SAND
GRAIN SIZE IN MILLIMETERS
coarse fine
SM Silty Sand
SP Poorly Graded Sand with Gravel
SP-SM Poorly Graded Sand with Silt and Gravel
GP-GM Poorly Graded Gravel with Silt and Sand
SM Silty Sand
Classification
D100 D60 D30 D10 %Gravel
0.494
2.893
3.369
7.153
0.233
B-4
B-4
B-5
B-8
TP-1
coarse SILT OR CLAYfinemedium
2.5
15.0
10.0
10.0
4.0
%Sand %Silt %Clay
0.751
1.391
2.518
0.436
0.242
0.354
2.3
24.7
25.5
54.8
1.2
61.7
70.9
66.8
38.4
54.7
BOREHOLE DEPTH
BOREHOLE DEPTH
3 100
B-4
B-4
B-5
B-8
TP-1
24 16 301 200610501/2 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403420406601.5 8 143/4 3/8
2.5
15.0
10.0
10.0
4.0PERCENT FINER BY WEIGHTCLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GRAIN SIZE - GINT STD US LAB.GDT - 7/23/15 15:31 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.0010.010.1110100
PI Cc CuLLPL
GRAIN SIZE DISTRIBUTION
COBBLES GRAVEL
21.8
48.5
25.4
25
19
37.5
SAND
GRAIN SIZE IN MILLIMETERS
coarse fine
SM Silty Sand with Gravel
SM SIlty Sand
SM Silty Sand with Gravel
Classification
D100 D60 D30 D10 %Gravel
2.902
0.179
3.959
TP-3
TP-5
TP-6
coarse SILT OR CLAYfinemedium
3.5
4.0
4.0
%Sand %Silt %Clay
0.336
0.195
30.4
12.6
36.9
47.8
38.9
37.6
BOREHOLE DEPTH
BOREHOLE DEPTH
3 100
TP-3
TP-5
TP-6
24 16 301 200610501/2 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403420406601.5 8 143/4 3/8
3.5
4.0
4.0PERCENT FINER BY WEIGHTCLIENT NAI Black
PROJECT NUMBER 14-037B
PROJECT NAME Gustin Levee
PROJECT LOCATION Spokane County
GRAIN SIZE - GINT STD US LAB.GDT - 7/23/15 15:31 - J:\_IPEC PROJECTS\_2014 PROJECTS\14-037B GUSTIN LEVEE FOR PAINTED HILLS\GINT\14-037B GUSTIN LEVEE.GPJInland Pacific Engineering Company
3012 North Sullivan Road, Suite C
Spokane Valley, WA 99216
Telephone: 509-209-6262
Fax: 509-290-5734