7239 - ADDENDUM #2 - Soil Boring DataDenton Enterprise Airport Landside Paving Improvements
Soil Boring Data
This information is to be used for general information only and is provided in
accordance with Section 4.2 of the Instructions to Bidders.
SEQ.
SHEETNO.ISSUESVERIFY SCALE01BYDATEF&N JOB NO.DTN18561DATEDESIGNEDDRAWNREVISEDCHECKEDFILE NAMEcv-trt-gn-siteplan_borings.shtTEXAS REGISTERED ENGINEERING FIRM F-2144FREESE AND NICHOLS, INC.Date:Plotter:$ACCOUNT$Nov. 12, 2018 - 07:10:02 PMJ:\Plotdrv_V8.11\PDF_File\PDF-Wysiwyg-Half.plt02516N:\IF\Drawings\1. General\cv-trt-gn-siteplan_borings.sht600.000 ' / in.Plot Scale:MicroStation V8 User:Date: Nov. 12, 2018 - 07:10:02 PM User:02516 File:$ACCOUNT$Fort WorthOffice:Fort WorthOffice:N:\IF\Drawings\1. General\cv-trt-gn-siteplan_borings.shtProject:Freese and Nichols, Inc. - True Type Fonts$MODEL$Model:NOT FOR CONSTRUCTIONDATE:THIS DOCUMENT IS RELEASED FOR THEPURPOSE OF INTERIM REVIEW UNDER THEAUTHORITY OFTEXAS NO:IT IS NOT TO BE USED FOR CONSTRUCTION,BIDDING OR PERMIT PURPOSES.this sheet, adjust scale.drawing. If not one inch onBar is one inch on originalCITY OF DENTON, TEXASDENTON ENTERPRISE AIRPORTNOV, 201899316NOV 2018SPENCER B MAXWELL600'300'0
SCALE IN FEETFM 1515Westcourt Rd
ZGJPCIVILBORINGS-1N BORING LOCATIONS1) Schweizer St2) Clear Star St3) Lockheed Ln4) John Carrell Rd5) Spartan Dr6) Skylane
7) Masch Branch Rd8) Wa
r
bir
d Dr 9)
Sabr
e Ln10) Aeronca Dr
SITE PLANB-01
B-02
B-03 B-04
B-05
B-06
B-07
B-08
B-09
B-10
B-11
B-12
24 36223.0 (P)
3.75 (P)
38
46
0.5/
3/
6" HMAC
(CH) FAT CLAY, dark brown, very stiff
(CH) FAT CLAY, brown, very stiff
Total boring depth 5.0 ft.
5887U-1
U-2 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.194885 Longitude:-97.192319
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-01
23 4119
0
1.0 (P)
2.75 (P)
22
63
0.4/
1.8/
2.1/
5" HMAC
(CH) FAT CLAY, dark brown, very soft,scattered asphalt fragments
Asphalt
(CH) FAT CLAY, brown to reddish-brown,medium stiff to stiff
Total boring depth 5.0 ft.
6085
U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.195954 Longitude:-97.192535
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-02
10025 4321
4.5+ (P)
4.5 (P)
2.25 (P)
2.75 (P)
25
25
25
54
0.3/
1.8/
4/
4" HMAC
(CH) FAT CLAY, brown, hard, with asphaltfragments
(CH) FAT CLAY, dark brown, stiff
(CH) FAT CLAY, reddish-brown, stiff, withtrace fine sandstone gravel
Total boring depth 5.0 ft.
6486
U-1
U-2
U-3
U-4 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.196179 Longitude:-97.192300
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-03
10920 22193.5 (P)
2.25 (P)
29
31
0.25/
1.9/
3" HMAC
(CL) LEAN CLAY, with sand,reddish-brown
(CH) FAT CLAY, dark gray, very stiff, withtrace of fine sandstone gravel
Total boring depth 5.0 ft.
4176U-1
U-2 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.197296 Longitude:-97.192266
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-04
24 41213.25 (P)
3.25 (P)
27
42
0.25/
1/
3/
3" HMAC
(CH) FAT CLAY, brown, hard, mixed withgravel base material
(CH) FAT CLAY, brown, very stiff,scattered limestone gravel
(CL) LEAN CLAY, reddish-brown, very stiff,scattered limestone gravel
Total boring depth 5.0 ft.
6286U-1
U-2 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.197769 Longitude:-97.193730
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-05
31 37292.25 (P)
1.75 (P)
2.25 (P)
19
44
71
0.25/
4/
3" HMAC
(CH) SANDY CLAY, dark gray, stiff tomedium stiff
(CH) FAT CLAY, brown, stiff
Total boring depth 5.0 ft.
6659U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.197740 Longitude:-97.191873
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-06
25 3620
4.5+ (P)
4.0 (P)
1.75 (P)
17
54
92
0.5/
6" HMAC
FAT CLAY, reddish-brown, very stiff tomedium stiff, slightly calcareous, tracefine limestone gravel
Total boring depth 5.0 ft.
5686
U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.197727 Longitude:-97.190997
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-07
39 19424.5+ (P)
3.25 (P)
4.5+ (P)
28
44
67
0.25/
2/
4/
3" HMAC
(CH) FAT CLAY, reddish-brown, hard(possible lime treatment)
(CL) LEAN CLAY, reddish-brown, very stiff,with calcareous deposits
(CL) LEAN CLAY, reddish-brown,calcareous, some fine limestone gravel
Total boring depth 5.0 ft.
6122U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.198473 Longitude:-97.192234
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-08
10125 40232.0 (P)
3.25 (P)
3.25 (P)
44
41
83
0.25/3" HMAC
(CH) FAT CLAY, with sand, reddish-brown,stiff to very stiff
Total boring depth 5.0 ft.
6383U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.199285 Longitude:-97.194122
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-09
23 3921
NT
3.0 (P)
4.5+ (P)
11
33
75
0.25/
2/
4/
3" HMAC
(CL) LEAN CLAY, reddish-brown, gravelly
(CH) FAT CLAY, with sand, reddish-brown,very stiff
(CL) LEAN CLAY, reddish-brown, hard,calcareous
Total boring depth 5.0 ft.
6083
U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Sample 0.5 to 2 feet fell apart upon extrusion. Boring backfilled and pavementpatched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.199237 Longitude:-97.192907
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-10
9924 33212.25 (P)
2.25 (P)
29
17
0.33/4" HMAC
(CH) FAT CLAY, with sand, darkreddish-brown, stiff
Total boring depth 5.0 ft.
5481
U-1
U-2
U-3 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling No sample recovery 1 to 2 feet-probable gravelly base material. Boring backfilledand pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.203171 Longitude:-97.192709
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-11
110
20
22
33213.5 (P)
3.5 (P)
33
25
0.33/
3/
4" HMAC
(CH) FAT CLAY, with sand, dark brown togray, very stiff
(CL) LEAN CLAY, reddish-brown, very stiff,calcareous
Total boring depth 5.0 ft.
5474U-1
U-2 UNIT DRY WEIGHT, pcfWATER CONTENT, %ELEVATION, ftSTRAIN AT FAILURE, %UNC. COMPRESSIVESTRENGTH, tsfPLASTICITY INDEXPLASTIC LIMITDEPTH, ftBLOW COUNTSHAND PENE-TROMETER (P) /TORVANE (T), tsfRECOVERY, %RQD, %SYMBOLMATERIAL DESCRIPTION
LIQUID LIMIT% PASSINGNO. 200 SIEVETYPESAMPLE
Dry At Time Of Drilling Boring backfilled and pavement patched at completion.
Date Drilling Started:10/26/2018
Project Description:Denton Airport Roads
Project Location:Denton, Texas
Logged By:D. Rohmer
Rig Type:CME 75
Elevation:
Hammer Type:-
Drilling Co.:Texplor of Dallas, Inc.
Latitude:33.204795 Longitude:-97.193800
Project No.:DTN18561
Phase No.:****
Date Drilling Completed:10/26/2018
Drill Method:Auger and Undisturbed
The stratification lines represent approximate strata boundaries. In situ, the transition may be gradual. These logsare subject to the limitations, conclusions, and recommendations in the associated report.Sheet 1 of 1
Water Observations:Remarks:
5
10
15
LOG OF BORING NO. B-12
Copyright Freese and Nichols, Inc., Version 1.4 (September 8, 2014)
BORING LOG LEGEND AND NOMENCLATURE
Abbreviations
U – Undisturbed Sample (tube) SPT – Standard Penetration Test NT – Not Testable
A – Auger Sample TCP – Texas Cone Penetration NP – Non Plastic
CS – Continuous Sample CFA – Continuous Flight Auger ATD – At Time of Drilling
C – Rock Core HSA – Hollow Stem Auger AD – After Drilling
General Terms
Term Description
Blow Counts Results from either the Standard Penetration Test (SPT) or the Texas Cone Penetration (TCP) test.
Recovery Length of sample or core recovered divided by the total length pushed, driven, or cored (expressed as a %)
Rock Quality Designation (RQD) Cumulative length of unfractured pieces of core material more than 4 inches in length divided by the total
length of material cored (expressed as a percentage)
Consistency of Cohesive Soil
Description Comp. Strength, tsf Criteria SPT Blows TCP Blows
Very Soft < 0.25 Sample sags under its own weight and is easily deformed 0 – 2 0 – 8
Soft ≥ 0.25 – < 0.5 Easily pinched between fingers and remolded with light finger pressure > 2 – 4 > 8 – 20
Medium Stiff ≥ 0.5 – < 1.0 Imprinted easily with fingers and remolded with firm finger pressure > 4 – 8 N/A for TxDOT
Stiff ≥ 1.0 – < 2.0 Imprinted with strong finger pressure or indented easily with fingernail > 8 – 15 >20 – 40
Very Stiff ≥ 2.0 – < 4.0 Light imprint from finger or light indent with fingernail > 15 – 30 > 40 to 80
Hard ≥ 4.0 Difficult to indent with fingernail > 30 >80
Apparent Density of Cohesionless Soil
Description SPT Blow Count Texas Cone Blow Count
Very Loose 0 – 4 0 – 8
Loose > 4 – 10 > 8 – 20
Medium Dense > 10 – 30 > 20 to 80
Dense > 30 – 50 80 to ≥ 5”
Very Dense > 50 0” to < 5”
Textural Adjectives
Textural Item Description
Pit Pinhole sized openings
Vug Small openings up to 4 inches in size
Cavity Opening larger than 4 inches
Honeycomb Numerous and grouped pits and vugs
Vesicle Small openings in volcanic rocks
Soil Structure
Description Criteria
Stratified Alternating layers of varying material/color with layers ≥ 1/4-inch thick
Laminated Alternating layers of varying material/color with layers < 1/4-inch thick
Fissured Breaks along definite planes with little resistance
Slickensided Fracture planes appear polished or glossy; shows movement direction
Blocky Cohesive soil that can be broken into small, angular lumps
Lensed Inclusion of small pockets of soil that is different from dominate type
Homogenous Same color and appearance throughout
Moisture Condition
Description Criteria
Dry Absence of moisture, dusty, dry to the touch
Moist Damp but no visible water
Wet Visible free water
Page 1 of 2
Copyright Freese and Nichols, Inc., Version 1.4 (September 8, 2014)
BORING LOG LEGEND AND NOMENCLATURE
Rock Hardness Descriptors
Grade Approx. Comp.
Strength, tsf
Approx.
TCP Range Field Test
Very Soft < 10 - 100 >6” Can be peeled with pocket knife, crumbles under firm blows of geological hammer
Soft 100 - 500 4” - 6” Can be peeled with pocket knife with difficulty, indented by firm blows of geological hammer
Hard 500 - 1000 1” - 5” Cannot be peeled with pocket knife, can be fractured by single firm blow of hammer
Very Hard 1000 - 2000 0” - 2” Specimen requires more than one blow of geological hammer to fracture it
Extremely Hard > 2000 0” Specimen requires many blows of geological hammer to fracture it
Degree of Rock Weathering
Description Criteria
Unweathered No evidence of chemical or mechanical alteration
Slightly Weathered Slight discoloration of surface or discontinuities; < 10% volume altered
Weathered Discoloring evident; 10 to 50% of volume altered
Highly Weathered Entire mass discolored; alteration through majority of rock
Decomposed Rock reduced to soil consistency with some rock-like texture
Page 2 of 2
Rock Bedding Structure
Description Criteria
Laminated < 3/8 inch
Very Thinly Bedded 3/8—1 inch
Thinly Bedded 1 inch—4 inches
Moderately Bedded 4 inches—1 foot
Thickly Bedded 1 foot—3 feet
Very Thickly Bedded 3– 10 feet
Massive > 10 feet
Soil Column Graphic Symbols*
Graphic Represented Soil Types Graphic Represented Soil Types
Fat Clay, Fat Clay with sand, Sandy Fat Clay Well-Graded Sand or Poorly-Graded Sand; little to no fines
Lean Clay, Lean Clay with sand, Sandy Lean Clay, Silty Clay Clayey Gravel, Gravel-Sand-Clay Mixtures
Inorganic Silt and Organic Silt Silty Gravel, Gravel-Sand-Silt Mixtures
Clayey Sand, Clay-Sand Mixtures Well-Graded Gravel or Poorly-Graded Gravel; little to no fines
Silty Sands, Sand-Silt Mixtures Fill with Significant Debris or Deleterious Material
Rock Column Graphic Symbols*
Graphic Represented Rock Types Graphic Represented Rock Types
Limestone, Shaly/Marly Limestone, Limestone with Shale Marl, Marl with Limestone, Marl with Shale
Shale, Shale with Limestone Sandstone, Shaly Sandstone, Sandstone with Shale
Mudstone Generic Bedrock Symbol
* Combined graphics may be used for dual classifications. Not all graphics represented. Refer to lithology description for soil classification or rock type.