McCandless_Avenue_Substructure_Boring_Logs.pdf
PDF 5 MB Posted
- Attached to
- Stanton Ave/McCandless Ave Stairs Construction
- Solicitation number
- 2024-IFB-309
- Issued by
- Allegheny County, Pennsylvania
About this file
The document is a subsurface exploration report for the Stanton Avenue Steps project, prepared by D'Appolonia Engineering for the City of Pittsburgh's Department of Mobility and Infrastructure (DOMI). The report details geotechnical boring logs from four separate borings (B-1, B-2, B-3, and B-4) conducted in the Stanton Heights neighborhood between March 23 and April 1, 2021. The borings were performed to investigate subsurface conditions for a planned stair construction project along Stanton Avenue and McCandless Avenue, with depths ranging from 22.5 to 45 feet.
The boring logs reveal a complex geological profile consisting primarily of fill materials, silty clay, claystone, and shale. Soil conditions vary from very soft to stiff, with fill layers containing construction debris, gravelly sand, and trace organics. Rock cores show varying degrees of weathering, from completely to slightly weathered, with colors ranging from red to gray. The borings encountered auger refusal at depths between 10.2 and 21.5 feet, indicating challenging subsurface conditions that will likely require specialized construction techniques. The investigation provides critical geotechnical data to inform design and construction strategies for the proposed stair project, helping engineers understand potential foundation and excavation challenges.
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STANTON AVENUE STEPS
SUBSURFACE EXPLORATION
701 RODI ROAD, FLOOR 2
(412) 856-9440
PITTSBURGH, PENNSYLVANIA 15235-4559
FAX (412) 856-9535
STATE MAP
1-800-242-1776
701 RODI ROAD, FLOOR 2
(412) 856-9440
PITTSBURGH, PENNSYLVANIA 15235-4559
FAX (412) 856-9535
701 RODI ROAD, FLOOR 2
(412) 856-9440
PITTSBURGH, PENNSYLVANIA 15235-4559
FAX (412) 856-9535
2.0
9.3
10.4
13.0
21.5
S-1
S-2
S-3
GS-1
S-4
S-5
S-6
S-7
S-8
GS-2
S-9
S-10
S-11
S-12
GS-3
R-1
R-2
R-3
R-4
0.7 (47) 0.2
(100)
0.2 (67)
0.2 (100)
0.2 (100)
0.1 (100)
1.0 (91)
0.1 (33)
0.0 (0)
1.1 (73)
1.0 (67)
0.9 (75)
0.6 (30)
0.0 (0)
0.0 (0)
0.0 (0)
1.0 3.0
968.0
960.7
959.6
957.0
948.5
CL
Gravelly Sand, Trace Organics, Very Soft, Dark Brown, Dry, [Fill], (2.0 Auger refusal, switch to NQ2 for drilling)
Construction Debris, Hard, Brown And Gray, Dry, [Fill], Cobble to boulder size broken concrete debris
Sandy Gravel, Trace Brick, Very Soft To Soft, Brown, Dry To Moist, [Fill]
Construction Debris, Hard, Brown And Gray, Dry, [Fill], Cobble to boulder size broken concrete debris
Silty Clay, Trace Gravel, Stiff To Very Stiff, Pale Tannish Red, Dry To Moist
Claystone, Completely Weathered To Moderately Weathered, Very Broken, Soft To Medium Hard, Red
(The drill rig's slow pace of rock coring likely led to claystone washout and resulting poor recovery)
D E
P T
H (f t)
20 40 60 80
PL LLMC
SPT N VALUE
20 40 60 80
G R
A P
H
IC
LO
G
(Continued Next Page)
VISUAL CLASSIFICATION LOG
S A
M P
LE
T
Y P
E N
U M
B E
R
R E
C O
V E
R Y
, f t
E S
T q u
(t sf
LA
B
U S
C S
FIELD DESCRIPTION
BORING B-1
FINES CONTENT (%)
20 40 60 80
DATE STARTED: 03/23/2021
DATE COMPLETED: 03/26/2021
LOGGED BY: MJG
CHECKED BY: ZSG/LTP
LOCATION: City of
Pittsburgh
ELEVATION:970 ft.
(N) 424,563.70 (E) 1,357,273.30
TIME OF DRILLING: N/A
END OF DRILLING: N/A
98hrs AFTER DRILLING: 14.0 ft / El. 956.0 ft
DRILLING CONTRACTOR: Terra Testing Inc.DRILLING CONTRACTOR: Terra Testing Inc.
DRILLER: Mike Powell
CORING METHOD: NQ2 (Cuttings Rem. w/H2O)
DRILLING METHOD: 2-1/4" ID HSA, 2" OD SBS (6")
GROUND WATER LEVELS:
BORING B-1
NOTES:
- The stratification lines represent the approximate boundary lines between soil types. In situ, the transitions may be gradual.
- Estimated qu for soil samples are based on pocket penetrometer tests.
- Estimated qu for intact rock core are based on laboratory tests.
BORING B-1
PROJECT: Stanton Avenue Steps
PROJECT NUMBER: 214224
LOCATION: Stanton Heights
CLIENT: City of Pittsburgh - DOMI
D A
P P
B O
R
IN
G L
O G
S
T A
N T
O N
A V
E N
U E
S T
E P
S .G
P J
N O
LA
N
R U
N D
A T
A B
A S
E T
E M
P .G
D T
/2
/2
3-8-30 (38)
50/0.2'
50/0.3'
50/0.2'
50/0.2'
50/0.1'
37-21- 50/0.1'
50/0.3'
16-8-11 (19)
12-14-16 (30)
18-31-32 (63)
23-48- 50/0.2'
0.0 (0)
0.0 (0)
0.0 (0)
0.0 (0)
SPT
BLOW
COUNT
(N / ft)
RQD, ft
(% RQD)
37.0
41.3
45.0
R-5
R-6
R-7
R-8
R-9
0.2 (20) 0.5 (50) 1.0
(100)
3.3 (83)
0.8 (27)
933.0
928.7
925.0
Claystone, Completely Weathered To Moderately Weathered, Very Broken, Soft To Medium Hard, Red
Shale, Moderately Weathered, Very Broken To Slightly Broken, Hard, Gray
Shaley Claystone, Highly Weathered To Moderately Weathered, Very Broken, Medium Hard To Hard, Gray To Red
SPT Refusal at 21.5 feet.
Bottom of Boring at 45.0 feet.
D E
P T
H (f t)
20 40 60 80
PL LLMC
SPT N VALUE
20 40 60 80
G R
A P
H
IC
LO
G
VISUAL CLASSIFICATION LOG
S A
M P
LE
T
Y P
E N
U M
B E
R
R E
C O
V E
R Y
, f t
E S
T q u
(t sf
LA
B
U S
C S
FIELD DESCRIPTION
BORING B-1
FINES CONTENT (%)
20 40 60 80
DATE STARTED: 03/23/2021
DATE COMPLETED: 03/26/2021
LOGGED BY: MJG
CHECKED BY: ZSG/LTP
LOCATION: City of
Pittsburgh
ELEVATION:970 ft.
(N) 424,563.70 (E) 1,357,273.30
TIME OF DRILLING: N/A
END OF DRILLING: N/A
98hrs AFTER DRILLING: 14.0 ft / El. 956.0 ft
DRILLING CONTRACTOR: Terra Testing Inc.DRILLING CONTRACTOR: Terra Testing Inc.
DRILLER: Mike Powell
CORING METHOD: NQ2 (Cuttings Rem. w/H2O)
DRILLING METHOD: 2-1/4" ID HSA, 2" OD SBS (6")
GROUND WATER LEVELS:
BORING B-1
NOTES:
- The stratification lines represent the approximate boundary lines between soil types. In situ, the transitions may be gradual.
- Estimated qu for soil samples are based on pocket penetrometer tests.
- Estimated qu for intact rock core are based on laboratory tests.
BORING B-1
PROJECT: Stanton Avenue Steps
PROJECT NUMBER: 214224
LOCATION: Stanton Heights
CLIENT: City of Pittsburgh - DOMI
D A
P P
B O
R
IN
G L
O G
S
T A
N T
O N
A V
E N
U E
S T
E P
S .G
P J
N O
LA
N
R U
N D
A T
A B
A S
E T
E M
P .G
D T
/2
/2
0.0 (0) 0.0 (0) 0.4 (40)
1.9 (48)
0.0 (0)
SPT
BLOW
COUNT
(N / ft)
0.5 1.0 2.0
10.0
13.5
22.5
S-1
S-2
S-3
S-4
S-5
S-6
S-7
S-8
S-9
S-10
R-1
1.3 (87)
0.7 (47)
0.9 (60)
1.4 (93)
0.6 (40)
1.3 (87)
0.7 (47)
1.5 (100)
0.7 (50)
1.0 (100)
1.7 (34)
1.0
2.0 2.5 3.0 3.7
0.8 2.3 3.0
940.8 940.3 939.3
931.3
927.8
918.8
CL
Asphalt, Dry
Subbase, Dry, [Subsoil]
Limestone, Unweathered, Hard, Gray
Silty Clay, Some Gravel, Trace To Some Sand, Medium Stiff To Very Stiff, Brown To Red, Dry To Moist
Silty Clay, Trace Rock Fragments, Trace To Some Sand, Medium Stiff To Very Stiff, Tan, Dry To Moist, [Completely weathered Shale]
Claystone, Completely Weathered To Moderately Weathered, Broken To Slightly Broken, Very Soft To Soft, Red
SPT/Auger Refusal at 17.5 feet.
Bottom of Boring at 22.5 feet.
D E
P T
H (f t)
20 40 60 80
PL LLMC
SPT N VALUE
20 40 60 80
G R
A P
H
IC
LO
G
VISUAL CLASSIFICATION LOG
S A
M P
LE
T
Y P
E N
U M
B E
R
R E
C O
V E
R Y
, f t
E S
T q u
(t sf
LA
B
U S
C S
FIELD DESCRIPTION
BORING B-2
FINES CONTENT (%)
20 40 60 80
DATE STARTED: 03/25/2021
DATE COMPLETED: 03/25/2021
LOGGED BY: MJG
CHECKED BY: ZSG/LTP
LOCATION: City of
Pittsburgh
ELEVATION:941.3 ft.
(N) 424,527.20 (E) 1,357,224.70
TIME OF DRILLING: DNE
END OF DRILLING: N/A
16hrs AFTER DRILLING: 2.6 ft / El. 938.7 ft
DRILLING CONTRACTOR: Terra Testing Inc.DRILLING CONTRACTOR: Terra Testing Inc.
DRILLER: Mike Powell
CORING METHOD: NQ2 (Cuttings Rem. w/H2O)
DRILLING METHOD: 3-1/4" ID HSA, 2" OD SBS (7")
GROUND WATER LEVELS:
BORING B-2
NOTES:
- The stratification lines represent the approximate boundary lines between soil types. In situ, the transitions may be gradual.
- Estimated qu for soil samples are based on pocket penetrometer tests.
- Estimated qu for intact rock core are based on laboratory tests.
BORING B-2
PROJECT: Stanton Avenue Steps
PROJECT NUMBER: 214224
LOCATION: Stanton Heights
CLIENT: City of Pittsburgh - DOMI
D A
P P
B O
R
IN
G L
O G
S
T A
N T
O N
A V
E N
U E
S T
E P
S .G
P J
N O
LA
N
R U
N D
A T
A B
A S
E T
E M
P .G
D T
/2
/2
5-4-5 (9)
4-4-3 (7)
4-5-6 (11)
10-11-11 (22)
13-16-14 (30)
7-6-9 (15)
10-14-23 (37)
24-28-34 (62)
12-20- 50/0.4'
34-50
0.0 (0)
SPT
BLOW
COUNT
(N / ft)
1.6
4.8
8.0
14.2
20.7
S-1
S-2
S-3
S-4
S-5
S-6
S-7 R-1
R-2
R-3
0.5 (33)
1.1 (73)
1.0 (67)
1.2 (80)
0.8 (57)
1.4 (93) 0.7
(100) 0.5
(100)
4.5 (90)
4.5 (90)
4.0
4.5
941.7
938.5
935.3
929.1
922.6
Clayey Sand, Trace Organics, Very Soft, Brown To Red, Dry To Moist, [Colluvium]
Silty Clay, Very Soft, Red And Brown, Dry To Moist
3.5-4.4 brown/gray sandstone fragments
Claystone, Completely Weathered, Very Broken, Soft, Pale Tannish Red
Shale, Completely Weathered To Highly Weathered, Very Broken To Broken, Medium Hard To Hard, Gray
Claystone, Highly Weathered, Very Broken, Soft To Medium Hard, Red
SPT/Auger Refusal at 10.2 feet.
Bottom of Boring at 20.7 feet.
D E
P T
H (f t)
20 40 60 80
PL LLMC
SPT N VALUE
20 40 60 80
G R
A P
H
IC
LO
G
VISUAL CLASSIFICATION LOG
S A
M P
LE
T
Y P
E N
U M
B E
R
R E
C O
V E
R Y
, f t
E S
T q u
(t sf
LA
B
U S
C S
FIELD DESCRIPTION
BORING B-3
FINES CONTENT (%)
20 40 60 80
DATE STARTED: 03/25/2021
DATE COMPLETED: 03/25/2021
LOGGED BY: MJG
CHECKED BY: ZSG/LTP
LOCATION: City of
Pittsburgh
ELEVATION:943.3 ft.
(N) 424,510.00 (E) 1,357,273.70
TIME OF DRILLING: DNE
END OF DRILLING: N/A
32hrs AFTER DRILLING: 7.6 ft / El. 935.7 ft
DRILLING CONTRACTOR: Terra Testing Inc.DRILLING CONTRACTOR: Terra Testing Inc.
DRILLER: Mike Powell
CORING METHOD: NQ2 (Cuttings Rem. w/H2O)
DRILLING METHOD: 3-1/4" ID HSA, 2" OD SBS (7")
GROUND WATER LEVELS:
BORING B-3
NOTES:
- The stratification lines represent the approximate boundary lines between soil types. In situ, the transitions may be gradual.
- Estimated qu for soil samples are based on pocket penetrometer tests.
- Estimated qu for intact rock core are based on laboratory tests.
BORING B-3
PROJECT: Stanton Avenue Steps
PROJECT NUMBER: 214224
LOCATION: Stanton Heights
CLIENT: City of Pittsburgh - DOMI
D A
P P
B O
R
IN
G L
O G
S
T A
N T
O N
A V
E N
U E
S T
E P
S .G
P J
N O
LA
N
R U
N D
A T
A B
A S
E T
E M
P .G
D T
/2
/2
3-4-34 (38)
5-10-10 (20)
17-26-25 (51)
32-36-36 (72)
17-28- 50/0.4'
37-46-39 (85)
31-50/0.2' 0.0 (0)
0.0 (0)
0.0 (0)
SPT
BLOW
COUNT
(N / ft)
8.3
22.2
28.3
32.0
S-1
S-2
S-3
S-4
S-5
S-6
S-7
S-8
R-1
R-2
R-3
R-4
R-5
R-6
R-7
R-8
R-9
R-10
R-11
0.8 (53)
0.8 (53)
0.7 (47)
0.8 (53)
0.8 (53)
1.4 (93) 0.4
(100) 0.0 (0)
0.0 (0)
0.6 (60) 0.0 (0) 0.0 (0) 0.4 (40) 0.8 (25)
1.8 (64)
2.9 (88)
0.2 (7)
0.8 (80)
1.7 1.8
4.5947.9
934.0
927.9
924.2
CL
Silty Clay, Trace Rock Fragments, Trace Organics, Trace Sand, Stiff, Brown To Red, Dry To Moist
Claystone, Completely Weathered To Highly Weathered, Very Soft To Medium Hard, Red
10.5 Auger refusal, begin rock coring
Shale, Highly Weathered, Medium Hard To Hard, Gray
Shaley Claystone, Slightly Weathered, Medium Hard
SPT/Auger Refusal at 10.9 feet.
Bottom of Boring at 32.0 feet.
D E
P T
H (f t)
20 40 60 80
PL LLMC
SPT N VALUE
20 40 60 80
G R
A P
H
IC
LO
G
VISUAL CLASSIFICATION LOG
S A
M P
LE
T
Y P
E N
U M
B E
R
R E
C O
V E
R Y
, f t
E S
T q u
(t sf
LA
B
U S
C S
FIELD DESCRIPTION
BORING B-4
FINES CONTENT (%)
20 40 60 80
DATE STARTED: 03/30/2021
DATE COMPLETED: 04/01/2021
LOGGED BY: MJG
CHECKED BY: LTP
LOCATION: City of
Pittsburgh
ELEVATION:956.2 ft.
(N) 424,534.90 (E) 1,357,272.90
TIME OF DRILLING: DNE
END OF DRILLING: N/A
AFTER DRILLING: N/A
DRILLING CONTRACTOR: Terra Testing Inc.DRILLING CONTRACTOR: Terra Testing Inc.
DRILLER: Justin Winters
CORING METHOD: NQ2 (Cuttings Rem. w/H2O)
DRILLING METHOD: 2 1/2" ID HSA, 2" OD SBS (6")
GROUND WATER LEVELS:
BORING B-4
NOTES:
- The stratification lines represent the approximate boundary lines between soil types. In situ, the transitions may be gradual.
- Estimated qu for soil samples are based on pocket penetrometer tests.
- Estimated qu for intact rock core are based on laboratory tests.
BORING B-4
PROJECT: Stanton Avenue Steps
PROJECT NUMBER: 214224
LOCATION: Stanton Heights
CLIENT: City of Pittsburgh - DOMI
D A
P P
B O
R
IN
G L
O G
S
T A
N T
O N
A V
E N
U E
S T
E P
S .G
P J
N O
LA
N
R U
N D
A T
A B
A S
E T
E M
P .G
D T
/2
/2
1-1-2 (3)
4-5-6 (11)
7-5-6 (11)
9-7-10 (17)
4-8-11 (19)
28-30-30 (60)
10-38-40 (78)
50/0.4'
0.0 (0)
0.0 (0)
0.0 (0) 0.0 (0) 0.0 (0) 0.0 (0) 0.0 (0)
0.0 (0)
0.5 (15)
0.0 (0)
0.3 (32)
SPT
BLOW
COUNT
(N / ft)
Subsurface Exploration Stanton Avenue Steps Stanton Heights Neighborhood, 10th Ward, City of Pittsburgh, Pennsylvania
D’Appolonia Project No. 214224
Photo 1 - Boring B-1 Box 1 of 2 Depth: 23.0’ – 45.0’
Photo 2 - Boring B-2 Box 2 of 2 Depth: 17.5’ – 22.5’
Subsurface Exploration Stanton Avenue Steps Stanton Heights Neighborhood, 10th Ward, City of Pittsburgh, Pennsylvania
D’Appolonia Project No. 214224
Photo 3 – Boring B-3 Box 1 of 1 Depth: 10.2’ – 20.7’
Photo 4 – Boring B-7 Box 1 of 2 Depth: 10.5’ – 32.0’
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