Geotechnical Report Addendum - Letter 1_AC-893579_HWY-264.pdf
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- Attached to
- Landslide Repairs in Morovis, Puerto Rico
- Solicitation number
- 693C73-24-B-000015
About this file
This document appears to be a Geotechnical Report Addendum related to a federal contract opportunity for Landslide Repairs in Morovis, Puerto Rico.
The report provides additional recommendations for the remedial measures along PR-155, Km 45.5, Morovis, Puerto Rico. It reviews the design drawings and notes that an intermediate bench with a concrete drainage swale should be added to the 1:1 and 1:1.5 cut slope design to properly dispose of surface runoff. The report includes revised boring logs from four soil borings taken at the project site.
The related federal contract opportunity is for the Landslide Repairs in Morovis, Puerto Rico project, Solicitation Number 693C73-24-B-000015. The project consists of repairing landslides and washouts caused by Hurricanes Irma and Maria on PR-155 and PR-159, and includes embankment reconstruction, wall construction, drainage system installation, paving, and other miscellaneous work. The contract will be awarded to a certified Small Business Concern, with a total project cost expected to be between $10,000,000 and $15,000,000. Bid documents are expected to be issued around July 23, 2024.
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Text version
Suelos, PSC
Soil & Construction Materials Laboratory and Environmental Drilling Services
Figure 1
August 26, 2022
CMA, Architects & Engineers P O Box 11490 San Juan, P.R. PR 00922-1490
Attention : Eng. José O. Colón Reference: Additional Recommendations for Landslide Remedial Measures along PR-155, Km 45.5, Morovis, P.R.
Gentlemen:
We have review the design drawings in connection with the reference project. In summary, the remedial works presented in drawings SS-01, PP-0 and GR-05 consist of a cut slope having 1:1 and 1:1.5 geometries, which is consistent with our recommendations.
From drawing GR-05 (see Figure 1), an intermediate bench has been provided between these 2 different slope geometries. It is also noted that a concrete paved waterway type II is shown at the toe of the cut slope but no swale has been considered at the intermediate bench.
To prevent excessive the run-off from spilling over the face of the cut, a longitudinal concrete drainage swale needs to be provided at the intermediate bench. The drainage swale shall be provided with proper gradients so as to properly dispose the surface run-off through the swale and into outlets.
Respectfully submitted, Ivan Jackson Maduro, PE, MSCE, CWI
Provide intermediate swale mailto:jcarro@cmapr.com
Suelos, PSC
Soil & Construction Materials Laboratory and Environmental Drilling Services
REVISED
BORING LOGS
50/3"
50/4"
ASPHALT
Medium-dense, medium coarse grained sand, strong to light brown (saprolitic sand)
-silty sand (SM);
-same as above;
-silty sand (SM);
Silty sand (SM)
-same as above; with severely weathered friable rock fragments
SUELOS, INC.
BORING NO. B-1
SHEET 1 OF
SUBSURFACE EXPLORATION LOG
LOCATION
NORTHING
EAST
PROJECT PR-155 MOROVIS, PR CODE NO. DATE 01/30/19
CASING: SAMPLER: GROUND ELEV.
HAMMER: WT DROP HAMMER: WT 140# DROP 30" DEPTH OF HOLE 22
TYPE SIZE TYPE SIZE DRILL MACHINE CME-55
DEPTH OF WATER: N/O M. AFTER COMPLETION DRILLER: N. ANDINO
M. HOURS AFTER COMPLETION DRILL METHOD: AUGER
*qu - UNCONFINED COMPRESSION STRENGTH; REPORTED VALUES
OBTAINED FROM:
A. POCKET PENETROMETER
B. SPRING TEST
C. UNCONFINED COMPRESSION TEST
1 - INCLUDES AASHTO CLASSIFICATION Rev. May 20, 1999
D E
P T
H
F T
S A
M P
L E
R S
B L
O W
S /6
S P
T N
V A
L U
E (B
L O
W S
/F T
R
E C
O V
E R
Y
S A
M P
L E
N O
S Y
M B
O L
MATERIAL DESCRIPTION1
U .S
.C .S
D
E S
IG
N
A T
IO
N
R .Q
.D
(R .M
.R
W n
W l
W p
I p q u
50/3"
50/4"
202749.0779
253336.4756
246.02
50/2"
50/3"
Asphalt, coarse angular gravel (fill)
Medium to very dense, gray to brown residual sand (saprolite sand)
-same as above;
-same as above;
-silty sand (SM);
Silty sand (SM)
-same as above;
SUELOS, INC.
BORING NO. B-2
SHEET 1 OF
SUBSURFACE EXPLORATION LOG
LOCATION
NORTHING
EAST
PROJECT PR-155 MOROVIS, PR CODE NO. DATE 01/30/19
CASING: SAMPLER: GROUND ELEV.
HAMMER: WT DROP HAMMER: WT 140# DROP 30" DEPTH OF HOLE 23
TYPE SIZE TYPE SIZE DRILL MACHINE CME-55
DEPTH OF WATER: N/O M. AFTER COMPLETION DRILLER: N. ANDINO
M. HOURS AFTER COMPLETION DRILL METHOD: AUGER
*qu - UNCONFINED COMPRESSION STRENGTH; REPORTED VALUES
OBTAINED FROM:
A. POCKET PENETROMETER
B. SPRING TEST
C. UNCONFINED COMPRESSION TEST
1 - INCLUDES AASHTO CLASSIFICATION Rev. May 20, 1999
D E
P T
H
F T
S A
M P
L E
R S
B L
O W
S /6
S P
T N
V A
L U
E (B
L O
W S
/F T
R
E C
O V
E R
Y
S A
M P
L E
N O
S Y
M B
O L
MATERIAL DESCRIPTION1
U .S
.C .S
D
E S
IG
N
A T
IO
N
R .Q
.D
(R .M
.R
W n
W l
W p
I p q u
50/2"
50/3"
202752.5407
253330.1076
246.11
50/3"
50/4"
50/3"
50/4"
Fill: asphalt with small-coarse angular gravel, sand
Dense to very dense, fine-coarse saprolitic sand with some severely weathered, friable rock fragments -same as above;
silty sand (SM)
-same as above;
-same as above;
-same as above;
SUELOS, INC.
BORING NO. B-3
SHEET 1 OF
SUBSURFACE EXPLORATION LOG
LOCATION
NORTHING
EAST
PROJECT PR-155 MOROVIS, PR CODE NO. DATE 01/31/19
CASING: SAMPLER: GROUND ELEV.
HAMMER: WT DROP HAMMER: WT 140# DROP 30" DEPTH OF HOLE 20.5
TYPE SIZE TYPE SIZE DRILL MACHINE CME-55
DEPTH OF WATER: N/O M. AFTER COMPLETION DRILLER: N. ANDINO
M. HOURS AFTER COMPLETION DRILL METHOD: AUGER
*qu - UNCONFINED COMPRESSION STRENGTH; REPORTED VALUES
OBTAINED FROM:
A. POCKET PENETROMETER
B. SPRING TEST
C. UNCONFINED COMPRESSION TEST
1 - INCLUDES AASHTO CLASSIFICATION Rev. May 20, 1999
D E
P T
H
F T
S A
M P
L E
R S
B L
O W
S /6
S P
T N
V A
L U
E (B
L O
W S
/F T
R
E C
O V
E R
Y
S A
M P
L E
N O
S Y
M B
O L
MATERIAL DESCRIPTION1
U .S
.C .S
D
E S
IG
N
A T
IO
N
R .Q
.D
(R .M
.R
W n
W l
W p
I p q u
50/3"
50/4"
50/3"
50/4"
202755.1367
253322.6395
246.19
50/2"
50/3"
50/2"
50/5"
50/4"
Fill: small-coarse angular gravel with clay pockets
Very dense, gray-brown saprolitic sand fine coarse grained
Silty sand (SM)
-same as above;
Silty sand with some severely weathered friable, rock fragments
Silty sand (SM)
-same as above;
SUELOS, INC.
BORING NO. B-4
SHEET 1 OF
SUBSURFACE EXPLORATION LOG
LOCATION
NORTHING
EAST
PROJECT PR-155 MOROVIS, PR CODE NO. DATE 01/31/19
CASING: SAMPLER: GROUND ELEV.
HAMMER: WT DROP HAMMER: WT 140# DROP 30" DEPTH OF HOLE 20.5
TYPE SIZE TYPE SIZE DRILL MACHINE CME-55
DEPTH OF WATER: N/O M. AFTER COMPLETION DRILLER: N. ANDINO
M. HOURS AFTER COMPLETION DRILL METHOD: AUGER
*qu - UNCONFINED COMPRESSION STRENGTH; REPORTED VALUES
OBTAINED FROM:
A. POCKET PENETROMETER
B. SPRING TEST
C. UNCONFINED COMPRESSION TEST
1 - INCLUDES AASHTO CLASSIFICATION Rev. May 20, 1999
D E
P T
H
F T
S A
M P
L E
R S
B L
O W
S /6
S P
T N
V A
L U
E (B
L O
W S
/F T
R
E C
O V
E R
Y
S A
M P
L E
N O
S Y
M B
O L
MATERIAL DESCRIPTION1
U .S
.C .S
D
E S
IG
N
A T
IO
N
R .Q
.D
(R .M
.R
W n
W l
W p
I p q u
50/2"
50/3"
50/2"
50/5"
50/4"
202756.0890
253313.6064
246.20
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