HomeMy WebLinkAboutSUB201900156 Certified Engineer's Report 2020-10-30 (2)Harrisonburg Office
1356 N. Main Street
Harrisonburg, VA22802
Phone:540-434-0400
Fax:540-434-0447
June 17, 2020
Mr. Timothy S. Culpepper, VP
Robinson Development Group
150 W. Main Street
Norfolk, VA 23510
Nile
Viola Engineering, PC
RE: Updated Bridge and Retaining Wall Design Parameters
Rivanna Village - Phase 2
Richmond Road, Albemarle County, VA
Project No: PTL-172379
Mr. Culpepper:
Winchester Office
402 ButFlick Road
Winchester, VA 22602
Phone: 540-313-4270
Fax:540-434-0447
We understand that design work has been completed for bridge and retaining wall structures for the
referenced project above. Bridge structures designed by Contech Engineered Solutions LLC and CBC
Engineers and retaining wall structures have been submitted and reviewed by personnel at the VDOT
Central Office. We provide the following updates to the Report of Geotechnical Investigation and
subsequent updates as it pertains to foundation design comments received. All design recommendations
and construction requirements given in the original report shall be utilized unless altered herein.
We expect that bridge foundations will bear on undisturbed weathered bedrock of uniform support
characteristics. Based on planned site grading, retaining walls will bear predominantly in residual site soils
of reduced support strength. Shallow spread footings may be used for support of the bridge abutments,
wingwalls, and retaining walls. Further, shallow bridge foundations can be designed with a factored
resistance of 6,750 psf (3.375 tsf) when bearing on dense weathered rock (N60> 40). It is recommended
that retaining walls, bearing on approved residual soils, be designed with a factored resistance of 3,375 psf
(1.688 tsf). A resistance factor of 0.45 was utilized to determine factored resistance values in accordance
with Table 10.5.5.2.2-1 of the AASHTO LRFD Design Specifications. We recommend that a resistance
factor of 0.85 be used for sliding between bearing strata and planned foundations. A resistance factor of
0.50 maybe used for passive soil resistance. Retaining walls and ancillary structures residing outside of
the VDOTRight of -Way maybe designed employing Allow Strength Design (ASD) methodology utilizing
a net allowable foundation bearing pressure of2,500 psf.
Bearing resistance for bridge foundations and retaining walls of 15,000 psf, and 7,500 psf may be used for
the extreme limit states when bearing on dense weathered rock. A resistance factor (cp) of 1.0 is used to
determine the resistance for extreme limit states. The factored resistance values, previously mentioned,
may also be used for service limit state analysis. Estimated highest foundation bearing elevations for bridge
abutments, and wing walls are presented in Table 1.0 on the following page. A minimum footing depth of
three (3) feet shall be maintained in accordance with latest revisions of the VDOT Modifications to the
AASHTO LRFD Bridge Design _Specification.
GEOTECHNICAL • GEOPHYSICAL A ENVMONMENTAL • MATERIALS
AA]
ACCREDITED
Updated Bridge and Retaining Wall Design Parameters
Rivanna Village - Phase 2, Albemarle County, VA
June 17, 2020
Page 2
Table 1.0 Estimated Highest Bridge Foundation Bearing Elevations
VEW
Boring
Structure
Structure
Roadway
Ground
SPT
Factored
Bearing
Bearing
Number
Type
Location
(Site Location)
Elevation
Bearing
Elevation
Depth
(It)
(Nbo)
(psf)
(ft)
from
Ground
ft
B-07a
Bridge
Foundation
East
Abutment
Lazy Branch
Lane
349.2
40
6750
346
3.2
B-07b
348.9
40
6750
346
2.9
B-07c
Bridge
Foundation
West
Abutment
Lazy Branch
Lane
349.1
40
6750
346
3.1
B-07d
348.7
40
6750
346
2.7
B-08a
Bridge
Foundation
West
Abutment
Terrapin Trace
362
40
6750
346
16
B-08b
360.2
40
6750
346
14.2
B-08c
Bridge
Foundation
East
Abutment
Terrapin Trace
362
40
6750
346
16
B-OSd
360.4
40
6750
346
14.4
It is our understanding that scour analyses have been conducted by others for the proposed bridge structures.
Continuous foundations shall be designed with a minimum width of two (2) feet to prevent localized shear
failure. Incorporating these foundation parameters for this project and good construction practices, we
expect settlement will be less than 1 inch with differential settlement no greater than 0.5 inches based on
vertical foundation loading resulting in bearing pressures equal to or less than specified in this letter.
Foundation excavations and subgrades should be observed and approved by the GER prior to placement of
concrete or backfill materials to ascertain that footings are placed on suitable bearing materials as
recommended herein. Disturbance of footing subgrades by exposure to water seepage or weather conditions
should be avoided. Any existing fill, disturbed, frozen, or soft subgrade soils should be removed prior to
placing footing concrete. Foundation elevations which are undercut due to accidental over excavation or
unsuitable bearing soils shall be backfilled with VDOT A3 concrete to design bearing elevations.
Compacted dense aggregate comparable to VDOT 21A may be used as backfill material if approved by the
GER upon review of site and foundation bearing conditions.
Good site management practices shall be employed to prevent water from entering foundation trenches at
all times. Furthermore, foundation trenches shall not be opened unless concrete or backfill materials can be
placed immediately thereafter to prevent the possibility of precipitation or water from entering and
softening the exposed bearing surfaces. Ephemeral stream water may infiltrate excavations depending on
the time of construction. As such, provisions shall be made to ensure the excavation is maintained in a dry
state until backfill is placed. The finished subgrade should be graded to promote positive drainage
accordingly. All construction activities shall be conducted in accordance with the latest revisions of the
VDOT Road and Bridge Specifications as required by approved design documents.
Updated design parameters and construction recommendations have been prepared to aid in the evaluation
of the suitability for the planned structures. Our scope is limited to the specific project and location
described, and the project description represents our understanding of the significant aspects relevant to soil
and foundation characteristics. Subsurface conditions may vary from those encountered at the test locations.
GEOTECHNICAL • GEOPHYSICAL A ENVMONMENTAL • MATERIALS
AA]
ACCREDITED
Updated Bridge and Retaining Wall Design Parameters
Rivanna Village - Phase 2, Albemarle County, VA
June 17, 2020
Page 3
VEW
I, I I I N1.111I KIAq_P,
The logs are intended to only represent the conditions at the test boring locations where the sampling
occurred. Classification of evaluated soils are based on recognized standards.
The interpretations and recommendations in this report are based solely on the information available at the
time this report was prepared. If the location or design of the structure is altered, the conclusions and
recommendations presented herein should not be considered valid unless we have been given the
opportunity to review the changes. We recommend that we be provided the opportunity to review the final
plans so it can be determined if revisions to the recommendations contained herein are warranted. If you
have any questions with regard to the information and recommendations presented herein, or if we can be
of further assistance, please do not hesitate to contact us.
Respectfully, �1tH`- I ^ CF
(�10
06/17/2020
TIMOTHY P. VIOLA
Timothy P. Viola, P.E. Lic. No. 0402056657
Project Engineer
Attachments: Updated Test Boring Location Plans and Logs
GEOTECHNICAL • GEOPHYSICAL A ENVMONMENTAL • MATERIALS
AA]
ACCREDITED
A I1010WXUM A "DIVU41
Richmond Road, Albemarle County, Virginia
y VEPC Project No: PTL-172379
e Date of Exploration: 6/20/18 - 7112118
n EPSG:2925 NAD83(HARN) / Virginia South (ftUS)
°n
a Paper Size: 11 "x17" 450 dpi
i
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,
' Lazy Branch Lane Civil Sheet: 32
3S4. ' Precast Concrete Single Box Culvert
' Span: 8 It Rise: 4 it Length: 80 ft
'-invert/Stream Bed In: 349 It
'-Invert/Stream Bed Out: 348 It
� 352-ft
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G 40 Sh t: 3 Contech Bridge Single Radius Steel
G-41 Arch Span on Concrete Strip Footing
y> Span: 28.83 it Rise: 7.42 ft Length: 90.25 ft
-invert/Stream Bed In: 349.9It
S-InvergSlream Bed Out: 348 ft
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60 0 60 120 ft\ Background obtained from OpenStreetMap. Site plans prepared by Alan Franklin PE, LLC
(4/26/18). Boring locations, elevation profile, and sanitary sewer profile provided by Blossom
Scale: 1 = 720 or tin = 60ft Rotation: 0 deg. clockwise Consulting and Engineering, Inc (11/3/17). Locations and elevations are approximate.
X 11518920 It X 11519040 ft X 11519160 ft X 11519280 ft X 11519400 ft
,I I
■E
■E
1t
,Ir
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I►E
1>
Legend
Borings
Auger Probe
Test Boring
X Notes
�Atlas Grid
Future Sanitary Sewer
Station No.
/ 100 ft
10 ft
Future Sewer Profile
B
Existing Contour
- 10 ft Contour
1 It Contour
Elevation Grid
Existing Topo
- 328 It
340 ft
352 It
0 364 ft
0 376 It
0 388 ft
- 400 ft
VEVIOLA ENGINEERING, PC
Geotechoicat • Geophysical • Eovir000eou it • Materials
VYinchester Office: Harrisonburg Office:
402 BufOick Road, Winchester, VA 22602 1356 N. Main Street, Havisonbmg VA 22802
Offcc 540-31342701 Fee: 540 34-(W7 Office: 540434 01 Fax: 540434-W7
Test Boring Location Plan Sheet: 3 of 11
Rivanna Village Phase 2 (Blocks F, G, H, I, & J)
Name
Elevation
Description
Inv/Bed
Drill Date
Condition
Termination
B-07a
349.16 ft
Bridge Foundation
-0.67 ft
06/26/18
Full Depth
25.5 It
B-07b
348.89 ft
Bridge Foundation
-0.94 ft
07/05/18
Full Depth
25.5 it
B-07c
349.05 It
Bridge Foundation
-0.78 ft
06/26/18
Full Depth
20 ft
B-07d
348.73 ft
Bridge Foundation
-1.1 ft
07/05/18
Full Depth
25.5 it
B-07e
351.71 ft
Retaining Wall
1.88 ft
06/26/18
Full Depth
15.5 ft
B-07f
351.25 ft
Retaining Wall
1.42 ft
06/25/18
Full Depth
15.5 it
B-07g
350.98 It
Retainin Wall
1.15 It
07/05/18
Full Depth
15.5 ft
B-07h
349.44 It
Retaining Wall
-0.39 ft
07/03/18
1 Full Depth
15.5 ft
B-10a
352 It
Box Culvert
3.5 It
07/03/18
Full Depth
10.5 ft
B-10b
348.11 ft
Box Culvert
-0.39 ft
07/03/18
Full Depth
10.5 ft
B-10c
354.25 It
Retaining Wall
5.75 It
07/03/18
Full Depth
10.5 ft
B-10d
352.21 ft
Retaining Wall
3.71 ft
07/05/18
Full Depth
10.5 It
B-10e
352.27 ft
Retaining Wall
3.77 It
07/03/18
Full Depth
10.5 ft
B-10f
350.75 ft
Retaining Wall
2.25 ft
07/05/18
Full Depth
10.5 it
AP-36
351.17 ft
-64 ft N MH B-8
07/12/18
Full Depth
8 It
AP-37
351.66 ft
Adjacent MH B-9
07/12/18
Full Depth
1 8 ft
AP-33
351.99 ft
-75 It NW MH B-7
07/12/18
Full Depth
loft
AP-34
350.97 ft
-128 it NW MH B-7
07/12/18
Full Depth
8 ft
AP-35
349.58 ft
Adjacent MH B-8
07/12/18
Full Depth
7 ft
Inv/Bed: Depth to invert or stream bed from existing grade. Negative value indicate boring below Inv/Bed elevation.
rc
Viola Engineering, PC BORING NUMBER B-07a
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 6/26/18 COMPLETED 6/26/18 GROUND ELEVATION 349.2 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889698.3 EASTING 11519274.2
DRILLING METHOD 2 1/4 HSA GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING -- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING —
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING —
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❑ FINES CONTENT (%) ❑
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TOPSOIL layer: 6"
SS
63
2-2
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RESIDUUM: orange brown, SILTY GRAVEL WITH
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SS
2-2-3-3
345
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5
SS
2-6-19-21
dense, dry, weathered shale, vertically bedded, (SM)
SS
4
100
16-26-50
(76)
layer: 20.5'
>60
• >>
>60
>>
SS
100
50
340
::
10
5
SS
100
50
>60
»
6
335
15
SS
100
50
>60
»
7
330
.:
20
SS
100
50
>>
>60
8
325
25
SS
9
100
50
>60
»
Bottom of borehole at 25.5' bgs
Backfilled with auger cuttings.
rc
Viola Engineering, PC BORING NUMBER B-07b
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 715118 COMPLETED 7/5/18 GROUND ELEVATION 348.9 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889666.3 EASTING 11519265.2
DRILLING METHOD 2 1/4 HSA GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING -- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING —
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING —
p
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15 30 45 60
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20 40 60 80
❑ FINES CONTENT (%) ❑
20 40 60 80
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TOPSOIL layer: 6"
'S
75
2 (6)�
9•
RESIDUUM: orange brown, SILTY GRAVEL WITH
SAND, loose to medium dense, moist, (GM) layer: 4.5'
345
0
5
2
(8)
14
SS
3
83
4A-5-5
(9)
RESIDUUM: orange brown, SILTY SAND, laminated,
moist, relic rock structure, (SM) layer: 2'
RESIDUUM purple brown, SILTY SAND, laminated, very
4
(28)
dense, dry, weathered shale, vertically bedded, (SM)
SS
5
78
17-38-50
(88)
340
..:
layer: 18.5'
>60
• »
10
SS
100
50
>60
>>
6
335
.:
15
SS
100
50
>60
»
7
330
20
SS
100
50
>>
>60
8
325
:.
25
SS
9
100
50
>60
>>
Bottom of borehole at 25.5' bgs
Backfilled with auger cuttings.
5
Viola Engineering, PC BORING NUMBER B-07C
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 6/26/18 COMPLETED 6/26/18 GROUND ELEVATION 349.1 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889679.2 EASTING 11519302.1
DRILLING METHOD 3 1/4" HSAINO Core GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING --- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING --
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING -
zU
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MATERIAL DESCRIPTION
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15 30 45 60
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20 40 60 80
❑ FINES CONTENT (%) ❑
20 40 60 80
—.777
TOPSOIL layer: 12"
SS
1
50
1-3-2-4RESIDUUM:
(5)
8
orange brown, SILTY GRAVEL WITH
°
SAND, loose, moist, (GM) layer: 4'
SS
3-2-3-5
345
°
5
V
SS
16-15-1
HLwLjUUW. gray Drown, b amina e , moss ,
relic rock structure, (SM) layer: 2'
SS
4
100
11-24-4
(35)
53
•
RESIDUUM gray brown, SILTY SAND, laminated, very
340
.:
10
dense, dry, weathered shale, vertically bedded, (SM)
layer: 3'
>60
• >>
S5S
100
38-50
Moderately weathered, thin bedded, light to dark gray,
SHALE, intensely fractured, [Candler Formation]
moderately hard layer: 10'
RC
90
6
(0)
335
15
RC
100
7
(0)
330
20
Bottom of borehole at 20.0' bgs
Backfilled with auger cuttings.
Viola Engineering, PC BORING NUMBER B-07d
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 715118 COMPLETED 7/5/18 GROUND ELEVATION 348.7 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889644.4 EASTING 11519292.3
DRILLING METHOD 2 1/4 HSA GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING -- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING —
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING —
p
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MATERIAL DESCRIPTION
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♦ SPT N60 VALUE
15 30 45 60
PL LL
20 40 60 80
❑ FINES CONTENT (%) ❑
20 40 60 80
}
— 77
°
TOPSOIL layer: 9"
SS
83
2-3-4-5
11
0
RESIDUUM: orange brown, SILTY GRAVEL WITH
SAND, moist, (GM) layer: 2.3'
345
::
2
11
RESIDUUM: orange brown, SILTY SAND, laminated,
moist, relic rock structure, (SM) layer: 2'
3
>60dense,
RESIDUUM: purple brown, SILTY SAND, laminated, very
dry, weathered shale, vertically bedded, (SMlayer: 20.5'4S
>60
• >>340
t75
;
>60
>>
SS
5
10
SS
100
50
>60
»
6
335
15
SS
100
50
: »
>60
7
330
20
SS
100
50
>>
>60
8
325
25
SS
9
100
50
>60
»
Bottom of borehole at 25.5' bgs
Backfilled with auger cuttings.
Richmond Road, Albemarle County, Virginia
VEPC Project No: PTL.172379
Date of Exploration: 6/20/18 - 7112118
EPSG:2925 NAD83(HARN) / Virginia South (ftUS)
ii Paper Size: 11'x17" 450 dpi
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Scale: 1 = 720 or 1 in = 601t Rotation: 0 deg. clockwise
X 11519880 ft X 11520000 ft
120 ft
SIGHT \
0%
TY P.
Terrapin Tr ce Civil Sheet: 29
Contech Badge Multiplate Steel
Arch on Concrete Strip Footing
Span: 28.83 It Rise: 7.42 ft Length: 71.5 it
-invert/Stream Bed In: 362 it
-Invert/Stream Bed Out: 360 It
I _ 1 07
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PROPOSED 200' '
(SEE ATTACHED
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- -o-- --- .fir-- ------- - � � �-
Background obtained from OpenStreetMap. Site plans prepared by Alan Franklin PE, LLC
(4/26/18). Boring locations, elevation profile, and sanitary sewer profile provided by Blossom
Consulting and Engineering, Inc (11/3/17). Locations and elevations are approximate.
AJAAM
X 11520120 ft X 11520240 ft X 11520360 ft
ME
IP
Legend
Borings
Auger Probe
Test Boring
X Notes
�Atlas Grid
Future Sanitary Sewer
Station No.
\ 100 ft
10 ft
Future Sewer Profile
R
R4-1
Existing Contour
— 10 ft Contour
1 ft Contour
OpenStreetMap
Line
roads
primary & trunk
mary & trunk
500 - 1000
nor street
500 - 1000
Elevation Grid
Fxistina Tone
VeGeowchoka],Geoph"ka],Envimouenta1,Materials
VIOLA ENGINEERING, P
winchester Office: Ma onburg Office:
402 BufOick Road, Winchester, VA 22602 1356 N. Main Street, Ham..bmg VA 22802
Offcc 540-31342701 Fee: 540 34-0 7 Office: 5,W434 01 Fax: 540434-W7
Test Boring Location Plan Sheet: 9 of 11
Rivanna Village Phase 2 (Blocks F, G, H, I, & J)
Overview Scale. 1 = 12000 or Tin 10000 r
... °ate ` r• ._ _ rl
•
m
t I
Name
Elevation
Description
Inv/Bed
Drill Date
Condition
Termination
B-08a
362 ft
Bridge Foundation
1 ft
06/22/18
Full Depth
25.5 ft
B-08c
362 ft
Bridge Foundation
1 ft
06/22/18
Full Depth
25.5 ft
B-08e
360.93 ft
Retaining Wall
-0.07 ft
06/22/18
Full Depth
15.5 ft
B-08g
363.27 ft
Retaining Wall
2.27 ft
06/22/18
Full Depth
15.5 ft
B-08h
363.06 ft
Retaining Wall
2.06 ft
06/21/18
Full Depth
25.5 ft
AP-18
366.09 ft
Adjacent MH R4-1
07/10/18
Full Depth
5 ft
AP-19
364.45 ft
I Adjacent MH R-4
07/11/18
Full Depth
1 7 It
Inv/Bed: Depth to invert or stream bed from existing grade. Negative value indicate boring below Inv/Bed elevation.
A 1101VOavn A11JLuvuvn A11JLu1cun A 1101UL4un All JLwoUn
Richmond Road, Albemarle County, Virginia
VEPC Project No: PTL-172379 36z-h 1 c
Date of Exploration: 6/20/18 - 7/12/18
w - EPSG:2925 NAD83(HARN) / Virginia South (ftUS) '^— - - - — -- Jr
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60 0 60 120 ft Background obtained from OpenStreetMap. Site plans prepared by Alan Franklin PE, LLC
g (4/26/18). Boring locations, elevation profile, and sanitary sewer profile provided by Blossom
Scale: 1 = 720 or tin = 6011: Rotation: 0 deg. clockwise 58 Consulting and Engineering, Inc (11/3/17). Locations and elevations are approximate.
J.
X 11519880 ft X 11520000 ft X 11520120 ft X 11520240 ft X 11520360 ft
Legend
Borings
Auger Probe
Test Boring
Atlas Grid
Future Sanitary Sewer
Station No.
\ 100 ft
loft
Future Sewer Profile
T
T7-1
Existing Contour
— 10 ft Contour
1 ft Contour
OpenStreetMap
Line
roads
—inor street
500 - 1000
Elevation Grid
Existing Topo
- 328 It
- 340 It
0 352 It
VeGeowchoka],Geoph"ka],Envimouenta1,Materials
VIOLA ENGINEERING, P
wmch"ter Office: Harrisonburg Office:
402 BufOick Road, Wmche ier, VA 22602 1356 N. Mam Street, Hadsonbmg VA 22902
Offcc 540 31342701 Far: 540 34-1 7 Office: 540434L4001 Fax: 540434-(W7
Test Boring Location Plan Sheet: 10 of 11
Rivanna Village Phase 2 (Blocks F, G, H, I, & J)
Overview Scale: 1 = 12000 or 1 in = 1000ft
-_
� s
o
... oaf
;Oo
m
v �
1
�
t
Name
Elevation
Description
Inv/Bed
Drill Date
Condition
Termination
B-08b
360.18 It
Bridge Foundation
-0.82 ft
06/25/18
Full Depth
15 ft
B-08d
360.4 ft
Bridge Foundation
-0.6 ft
06/25/18
Full Depth
25.5 ft
B-081'
361.32 It
Retaining Wall
0.32 ft
06/25/18
Full Depth
15.5 ft
B-09a
394.02 ft
Borrow Area
06/20/18
Full Depth
20.5 ft
B-09c
382.45 ft
Borrow Area
06/20/18
Full Depth
25.5 ft
AP-17
370.42 ft
Adjacent MH T-5
07/10/18
Full Depth
17 ft
AP-01
394.2 It
Adjacent MH T7-1
06/21/18
Full Depth
14 ft
AP-02
395.93 It
Between MH T7-1 & MH T-7
06/21/18
Full Depth
15 ft
AP-03
393.99 ft
Adjacent MH T-7
06/21/18
Full Depth
18 It
AP-07
383.39 ft
Between MH T-7 & MH T-6
06/21/18
Full Depth
1 15 ft
AP-08
373.77 It
Adjacent MH T-6
06/21/18
Full Depth
13 ft
AP-16
366.15 ft
Between MH T-4 & MH T-5
07/10/18
Auger
Refusal
5 ft
Inv/Bed: Depth to invert or stream bed from existing grade. Negative value indicate boring below Inv/Bed elevation.
5
Viola Engineering, PC BORING NUMBER B-08a
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 6/22/18 COMPLETED 6/22/18 GROUND ELEVATION 362 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889829.5 EASTING 11520114.2
DRILLING METHOD 2 1/4 HSA GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV V AT TIME OF DRILLING 11.00 ft / Elev 351.00 ft
NOTES Locations and elevations are approximate. AT END OF DRILLING —
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING -
ZO
Q =K
Lu
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c�
o_ O
¢�
C7
E
w`
0
MATERIAL DESCRIPTION
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X
a�
2Z
N
e
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N w
p j Q
m0>
0z
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Z
a
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0
5
d
Zw
m❑
♦ SPT N60 VALUE
15 30 45 60
PL LL
20 40 60 80
FINES CONTENT (%) ❑
20 40 60 80
360,,
Ir —1=1
TOPSOIL Approximate Invert or Stream Bed Elevation.
layer:l2"-------------------J
RESIDUUM: red brown, SILTY SAND, laminated, moist,
relic rock structure, (SM) layer: 2'
1
71
1 (4)`1
6
•
5
SS
100
`�-1514
32
•
RESIDUUM. gr
dense, dry, weathered shale, vertically bedded, (SM)
layer: 22.5'
>60
• >>
S3
100
9-50
>60
>>
SS
100
50
355
4
>60
>>
SS
100
50
5
10
SS
100
50
>60
>>
SZ
6
350
:.
15
SS
100
50
>60
>>
345
20
SS
100
50
>>
>60
8
340
25
SS
9
100
50
>60
>>
Bottom of borehole at 25.5' bgs
Backfilled with auger cuttings.
Viola Engineering, PC BORING NUMBER B-08b
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 6/25/18 COMPLETED 6/25/18 GROUND ELEVATION 360.2 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889788.0 EASTING 11520081.5
DRILLING METHOD 3 1/4" HSAINO Core GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING --- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING --
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING -
z0
Q i
w`"
w
o_ O
��
C7
E
Lu
0
MATERIAL DESCRIPTION
w
o_�
2z
<
e
O
O�
0
Lu
p j Q
m0>
0z
"'
Z
a
w y
�"'
0
5
d
m
zw
m
♦ SPT N60 VALUE
15 30 45 60
PL LL
20 40 60 80
❑ FINES CONTENT (%) ❑
20 40 60 80
777
a o
TOPSOIL layer: 6"
SS
67
1-�3)-3
5
!M
RESIDUUM: red orange, SILTY GRAVEL WITH SAND,
loose, moist, (GM) layer: 2'
SS
2
100
15-22-1
(37)
56
RESIDUUM: gray brown, SILTY SAND, laminated, very
dense, dry, weathered shale, vertically bedded, (SM)
355
5
layer: 2.5'
>60
• >>
SS
3
100
25-50
Highly weathered, gray brown, SHALE, intensely
fractured, [Candler Formation] moderately hard layer: 5'
RC
100
4
(8)
350
10
Moderately weathered, light gray, SHALE, intensely
fractured, [Candler Formation] moderately hard layer: 5'
RC
100
5
(47)
15
Bottom of borehole at 15.0' bgs
Backfilled with auger cuttings.
rc
Viola Engineering, PC BORING NUMBER B-08C
PAGE 1 OF 1
VAF 1356 N. Main Street Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 6/22/18 COMPLETED 6/22/18 GROUND ELEVATION 362 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889821.1 EASTING 11520125.6
DRILLING METHOD 2 1/4 HSA GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING --- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING --
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING -
ZO
Q =K
Lu
w
c�
o_ O
��
C7
E
w`
0
MATERIAL DESCRIPTION
w
X
o_�
2Z
<
e
>
O
O�
0
Lu
N w
p j Q
m0>
0z
Z
a
I-- y
�"'
0
5
d
zw
m
♦ SPT N60 VALUE
15 30 45 60
PL LL
20 40 60 80
❑ FINES CONTENT (%) ❑
20 40 60 80
360
=
°
TOPSOIL layer: 6"
1
1
54
1-1-1-1
(2)
3
� •
RESIDUUM: orange brown, SILTY GRAVEL WITH r
t` SAND, very loose to loose, moist, (GM) layer: 4.5' _ _ _I
Approximate Invert or Stream Bed Elevation. layer: 0"
°
SS
2
100
1-2-2-2
(4)
6
•
°
5
SS
3
83
4-5-38-50
(43)
>60
RESIDUUM: gray brown, SILTY SAND, laminated, very
355�
dense, dry, weathered shale, vertically bedded, (SM)
layer: 20.5'
>60
>60
»
»
SS
100
50
SS
100
50
5
10
SS
100
50
>60
>>
6
350
15
SS
100
50
1 >60
»
345
20
SS
100
50
>>
>60
8
25
]340
SS
9
100
50
>60
>>
Bottom of borehole at 25.5' bgs
Backfilled with auger cuttings.
11
5
Viola Engineering, PC BORING NUMBER B-08d
PAGE 1 OF 1
VAF 1356 N. Main Street
Red line denotes approximate 6750psf
Harrisonburg, VA 22802 factored bearing elevation (N60: 40)
CLIENT Timothy Culpepper, VP, Robinson Development Group PROJECT NAME Rivanna Village
PROJECT NUMBER PTL-172379 PROJECT LOCATION Albemarle County, Virginia
DATE STARTED 6/25/18 COMPLETED 6/25/18 GROUND ELEVATION 360.4 ft HOLE SIZE 6 in
DRILLING CONTRACTOR Viola Engineering, PC NORTHING 3889775.1 EASTING 11520089.2
DRILLING METHOD 2 1/4 HSA GROUND WATER LEVELS:
LOGGED BY CLA CHECKED BY TPV AT TIME OF DRILLING --- Not encountered.
NOTES Locations and elevations are approximate. AT END OF DRILLING --
Blue line denotes approximate foundation bearing elevation. AFTER DRILLING -
w
e
Z
5
♦ SPT N60 VALUE
z0
a
d
15 30 45 60
PL LL
Q i
o_ O
E
MATERIAL DESCRIPTION
O
p j Q
w y
m
zw
W`
��
Lu
o_�
O�
m0>
�"'
20 40 60 80
w
C7
2z
<
0
Lu
0z
"'
0
m
❑ FINES CONTENT (%) ❑
0
20 40 60 80
= ^
TOPSOIL layer. 6"
a o
X
SS
1
88
1 )-3
6VO
RESIDUUM: red orange, SILTY GRAVEL WITH SAND,
loose to medium dense, moist, (GM) layer: 3.5'
SS
100
3-4-9-20
a
20
>60
8 >>
RESIDUUM gray brown, SILTY SAND, laminated, very
SS
100
16-50
355
5
dense, dry, weathered shale, vertically bedded, (SM)
layer: 21.5'
LN 3
>60
>>
SS
100
50
4
>60
>>
SS
100
50
5
10
350
>60
SS
6
100
50
>>
15
345
>60
SS
7
100
50
>>
20
340
>60
SS
8
100
50
>>
25
335
::
Bottom of borehole at 25.5' bgs
>60
SS
9
100
50
>>
Backfilled with auger cuttings.