Preview
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
Exhibit C
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
NEW YORK STATE DEPARTMENT OF TRANSPORTATION
NYSDOT REGION 8 BRIDGE REPLACEMENTS DESIGN-BUILD PROJECT
WESTCHESTER COUNTY, NEW YORK
CONTRACT D900036
GEOTECHNICAL WORK PLAN
July 2017
Prepared By:
Cr
engineering that moves you
CONFIDENTIAL INFORMATION SEDGWICK07377
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
NYSDOT Region 8 Bridge Replacements - Geotechnical Work Plan
Project Understanding
The proposed project involves the replacement of three (3)bridges located within Westchester County
with a new widened structure (Refer to table below for details). The scope of the project includes: a)
Removal of the existing substructure and superstructure; b) Replacement of the existing bridges,
including new foundations, substructures, superstructures and approach slabs; c) Approach roadway
reconstruction necessary to connect existing roadways to new bridge; d) Implementation of aWZTC
plan for each site; and e) construction of one temporary structure for Maintenance and Protection of
Traffic (MPT) during construction of replacement structures.
BIN County Municipality Carries Crosses
5500050] Westchester| Village of Pelham East 3rd Street |Hutchinson River Parkway
5500719] Westchester |Town of Greenburgh |Route987D Saw Mill River
5500739] Westchester |Town of Greenburgh |Route987D Saw Mill River
As per the RFP requirement, allstructures crossing water shall be supported on piles or drilled shafts
unless founded on rock. Due to geometric limitations a minimum freeboard of 2 feet for the 50-year
flood is not attainable for the Route 987D bridge (5500719 and 5500739); however, the current negative
freeboard will be notably reduced. To maintain vertical clearance of +12.6 feet at East 3 Street Bridge
(5500050) the roadway elevations of the Hutchinson River Parkway will remain and a flood wall is
proposed along the Parkway in order to avoid future flooding of the roadway.
Route 987D Bridges will be replaced with three span continuous galvanized steel superstructures with
concrete slab. East 3 Street Bridge will be replaced with a two span continuous galvanized steel
superstructure with concrete deck.
Geotechnical Scope
The geotechnical scope for the project includes the design and construction of all permanent and
temporary substructures, including assessing available information; planning and implementing
subsurface investigations; geotechnical analysis and reporting; and protection of existing infrastructure,
structures and utilitiesin accordance with the requirements of the RFP. Final analysis results will be
included in the Geotechnical Reports under separate covers as per the RFP.
in our opinion, assessment of available subsurface information provided by the DOT is limited;
therefore, we plan to implement a supplemental exploration program to further investigate the
subsurface conditions at all three (3) bridges. The available borings in conjunction with the borings from
the supplemental boring program will allow us to establish the geotechnical conditions and perform
geotechnical analyses and foundation design. The test borings will be inspected and samples will be
classified in accordance with NYSDOT guidelines. Selected samples will be subjected to laboratory
testing to evaluate their engineering index parameters. During construction, appropriate means of
CONFIDENTIAL INFORMATION SEDGWICK07378
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
construction will be implemented to ensure the protection of existing infrastructure, structures and
utilities in accordance with the requirements of the RFP.
Geological and Hvdrogeological Project Setting
The three (3) proposed bridges are within the Lower Hudson region. They fall within the Manhattan
Prong of the Hudson Highlands physiographic provinces where they alllie east of the Hudson River. The
geomorphological features predominantly consist of bedrock with superimposed glacial deposits,
alluvial deposits, and swamps. Bedrock in Westchester County consists of folded igneous and
metamorphic rock dating to the Precambrian to Ordovician epochs. The principal bedrock units are
"
Fordham Gneiss, Inwood Marble, and Manhattan Schist ["Goeteg, of Moo York Slate Phester
Westchester County is within the Hudson River drainage basin and is subject to aquifers through allsoil
strata. For the most part bedrock formations encountered in Westchester County are recognized as
aquifers. [Perimutter, Nathaniel. "Source of Ground Water in Southeastern New York" (1960): 8-9].
Seismic Setting
The new structures seismic design will be in accordance with current AASHTO LRFD codes and standards
~
This section summarizes the general subsurface condition for all three (3) bridges. In general, the
subsurface soils at the project limits exhibit favorable engineering characteristics to support
replacement bridge structures, and soil settlement is not of concern. For the purpose of engineering
analysis, the subsurface soils can be divided into three (3) distinct soil layers that are recognized
throughout the project sites: cohesionless soils, weathered rock, and bedrock. The general strata
descriptions are summarized in the order they were encountered.
A review of existing information indicates that the top stratum consists of cohesionless material
primarily containing Sand and Gravel with varying percentages of silt,and at some locations
cobbles/boulders were encountered. The cohesionless material was observed at the ground surface at
allsites. The thickness of this stratum varies from 19 feet to beyond 67 feet thick at the Route 987D
Bridges (5500719 and 5500739) and from 71 feet to 80 feet thick at the E.3" St Bridge (5500050). The
relative density varies from loose to very dense based on the existing field SPT data. The cohesionless
soil overlies Weathered Rock, which was encountered at all of the sites but not at every borehole
location. The stratum varies in thickness from 1 foot to 22 feet and has relative density of dense to very
dense with majority being very dense. Underlying the Weathered Rock stratum, bedrock is encountered
at varying depths. At the Route 987D Bridges (5500719 and 5500739), depth to bedrock varies
approximately from 19 feet to beyond 67 feet. At the E. 3"? StBridge (5500050), depth to bedrock varies
approximately from 71 feet to 86 feet. Recovery values vary from 13% to 100%, with most values falling
between 50% and 100%.
Refer to Appendix B for the existing subsurface exploration information.
CONFIDENTIAL INFORMATION SEDGWICK07379
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
Recommendations and Construction Considerations
Permanent Bridge Substructures
Several foundation alternatives were considered for the proposed substructures. Due to allof the sites
having favorable subsurface conditions of attainable bedrock, driven piles to bedrock and drilled shafts
socketed into bedrock offer the most practical foundation options. The new substructures at E. 3°?
Street Bridge (5500050), as well as the abutments of the Route 987D Bridges (5500719 and 5500739),
are proposed to be supported on driven piles. The piers of the Route 987D Bridges (5500719 and
5500739) are envisioned to be supported on drilled shafts used as a single row bent type. The driven
piles and drilled shafts will be designed to resist axial and lateral bridge loads in accordance with
AASHTO LRFD.
Considerations
H-Piles Foundation
As previously mentioned, foundations supported by H-piles will be driven to bedrock/refusal. A
drivability analysis will be performed during final design to verify adequacy of pile installation
procedure, as well as determine the pile capacity required and the structural integrity of the piles
throughout driving. Additionally, PDA dynamic testing may be required if the tips of any piles are to be
terminated in soil. At some locations it is anticipated that piles supporting the integral abutments at the
Route 987D Bridges (5500719 and 5500739) will be inserted into pre-excavated holes to accommodate
bridge lengths of 100 feet or more and/or to set pile tips below bedrock to achieve lateral stability.
Drilled Shaft Foundation
Crosshole Sonic Logging (CSL) shall be performed at each drilled shaft conforming to ASTM D6760-08 in
order to assess concrete quality. The quality of bedrock is anticipated to vary throughout the project and
within the rock sockets of individual shafts. The quality and performance of drilled shafts are sensitive to
construction procedures; therefore the selection of drilled shaft techniques used should be carefully
considered. An O-cell load test or Statnamic load test may be required on only 1 shaft on the project
where its tip is to be terminated in soil.
Temporary Bridge Substructures
Two temporary structures are projected to be constructed during replacement of the existing structures
for staging purposes. At the E. 3'¢ St Bridge (5500050) a single span full width temporary bridge is
proposed. The subsurface condition at this project site exhibits favorable engineering characteristics
with overburden granular soils at the top and bedrock at a deep depth. Due to the anticipated loads the
abutment is proposed to be supported on spread footings situated above temporary Geosynthetically
Reinforced Soil System Walls (GRSS walls). The GRSS walls will be designed to resist the additional
surcharge loads generated from the bridge loads. At the Route 987D Bridge 5500719 a temporary
extension of the bridge is proposed. This site also exhibits favorable soil conditions; based on the
CONFIDENTIAL INFORMATION SEDGWICK07380
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
anticipated loads, it is proposed to be supported on spread footings bearing on the overburden soil
stratum. Both the GRSS wall at bridge 5500050 and the spread footing supporting bridge 5500719 will
be directly supported on the existing ground and evaluated for overturning, sliding, bearing and global
stability.Construction considerations for the temporary structures includes removal of any soft or loose
material and provide a level surface prior to placement of the spread footings.
Subsurface Investigation
Geotechnical Subsurface Investigation
The proposed subsurface investigation program for the NYSDOT Region 8 Bridge Replacements Design-
Build project will be conducted on all three (3) bridges for the purposes of confirming existing
information and obtaining additional information in the proposed location of the abutments and piers.
The proposed subsurface investigation shall consist of seventeen (17) geotechnical borings. The table
below summarizes the proposed boring program.
Estimated Soil
BIN Boring No. Location Rock Core (ft)
Sampling (ft}
5500719)|SMB-1 West Abutment 25 10
5500719|SMB-2 West Abutment 25 10
5500719)|SMB-3 Pier 1 75 20
5500719 |SMB-4 Pier 1 50 20
5500719)|SMB-5 Pier 1 40 20
5500719|SMB-6 Pier 2 75 20
5500719|SMB-7 Pier 2 50 20
5500719|SMB-8 Pier 2 40 20
5500719)|SMB-9 East Abutment 45 10
5500739 |SMB-10 West Abutment 45 10
5500739|SMB-11 Pier 1 45 20
5500739 SMB-12 Pier 2 45 20
5500739|SMB-13 East Abutment 45 10
5500050 HRB-1 West Abutment 85 10
5500050 | HRB-2 Center Abutment 85 10
5500050 HRB-3 Center Abutment 85 10
5500050 |HRB-4 East Abutment 85 10
Field Soil classification and general boring inspection willbe performed by H&H, LLC and willprovide
boring logs of each borehole in accordance with ASTM D1i586 Standard Test Method for Standard
Penetration Test (SPT). Continuous SPT testing will be performed for the first 12 feet and 24-inch
samples taken every 5 feet thereafter.
Selected samples will be subjected to laboratory testing including but not limited to Combined Sieve and
Hydrometer Analysis, and Unconfined Compressive Strength of Rock. Please refer to Appendix A for the
boring location plans. The contractor willobtain allrequired permits including but not limited to the
highway work prior to commencement of work.
CONFIDENTIAL INFORMATION SEDGWICK07381
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
Environmental Soil Investigation
The preliminary soil disturbance estimate for the BIN 5500050 and BINs 5500719 and 5500739 are 5.32
and 7 acres, respectively. The scope of the project includes dredging and excavating of the river bed and
riparian areas and use of the excavated/dredged sediments as fillmaterial. EnTech will conduct a
Sediment and Soil Investigation, following the New York State Department of Environmental
Conservation (NYSDEC) regulations, to determine ifthe dredge sediment is proper for using as fill
material, following the generic beneficial use determination (BUD) under NYCRR Part 360-1.15(b)(7).
Prior to conducting the investigation, EnTech will prepare two Sampling Plans (one for BIN 5500050 and
one for BIN 5500739 and BIN 5500719). The Sampling Plans will include boring locations and depths,
number of samples to be collected, Quality Assurance/Quality Control procedures and proposed
laboratory testing and analysis. The Sampling Plans will be prepared using the guidance of the NYSDEC
Technical and Operational Guidance Series (TOGS) 5.1.9. and will be submitted NYSDEC for review and
approval. EnTech willundertake the sampling upon receiving the approval of the Sampling Plans. The
collected samples will be sent to a New York State Department of Health (NYSDOH) ELAP certified
laboratory for analysis. EnTech will utilize the results of the laboratory analysis to prepare and submit a
Soil and Sediment Investigation report, which includes: summary of the investigative findings,
description of impacted soils, summary of analytical results in tabular form, comparison of the analytical
results with TOGS 5.1.9 and NYSDEC cleanup objective (SCO), a written narrative describing the testing
and laboratory findings, boring logs, updated site map depicting soil boring locations, and
recommendation for handling and disposal of the contaminated soil as applicable. The prepared report
will be submitted to NYCDEC for review and approval. Sampling of the subsurface will be consistent with
the geotechnical borings procedures.
Bridge ID Environmental Design Boring
Number Boring iD Number 10 Number
HREBL NA
HREG? HRB-2
5500050
HREBS NA
HREB4 NA
SMEBL |
SMB-4
5500719 SMES? SMB-5
SMEB3 SMB-8
SMEB4 SMB-10
5500739 SMEBS SMB-L1
SMEBG SMB-12
Pe
pe fb ae af Pee
As described in the table above seven (7) of the proposed environmental borings match with the
Geotechnical borings and therefore samples collected at these specified locations will be provided to
Entech on an as-needed basis in order to perform all necessary testing. Please refer to Appendix C for
the Environmental Soil Investigation location plans.
CONFIDENTIAL INFORMATION SEDGWICK07382
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
APPENDIX A
Proposed Boring Location Plans
CONFIDENTIAL INFORMATION SEDGWICK07383
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
BORE HOLE LOCATION PLAN %
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CONFIDENTIAL INFORMATION SEDGWICK07384
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
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CONFIDENTIAL INFORMATION SEDGWICK07385
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020
NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022
NEW YORK STATE OO
DEPARTMENT OF TRANSPORTATION
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Preview
FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 Exhibit C FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 NEW YORK STATE DEPARTMENT OF TRANSPORTATION NYSDOT REGION 8 BRIDGE REPLACEMENTS DESIGN-BUILD PROJECT WESTCHESTER COUNTY, NEW YORK CONTRACT D900036 GEOTECHNICAL WORK PLAN July 2017 Prepared By: Cr engineering that moves you CONFIDENTIAL INFORMATION SEDGWICK07377 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 NYSDOT Region 8 Bridge Replacements - Geotechnical Work Plan Project Understanding The proposed project involves the replacement of three (3)bridges located within Westchester County with a new widened structure (Refer to table below for details). The scope of the project includes: a) Removal of the existing substructure and superstructure; b) Replacement of the existing bridges, including new foundations, substructures, superstructures and approach slabs; c) Approach roadway reconstruction necessary to connect existing roadways to new bridge; d) Implementation of aWZTC plan for each site; and e) construction of one temporary structure for Maintenance and Protection of Traffic (MPT) during construction of replacement structures. BIN County Municipality Carries Crosses 5500050] Westchester| Village of Pelham East 3rd Street |Hutchinson River Parkway 5500719] Westchester |Town of Greenburgh |Route987D Saw Mill River 5500739] Westchester |Town of Greenburgh |Route987D Saw Mill River As per the RFP requirement, allstructures crossing water shall be supported on piles or drilled shafts unless founded on rock. Due to geometric limitations a minimum freeboard of 2 feet for the 50-year flood is not attainable for the Route 987D bridge (5500719 and 5500739); however, the current negative freeboard will be notably reduced. To maintain vertical clearance of +12.6 feet at East 3 Street Bridge (5500050) the roadway elevations of the Hutchinson River Parkway will remain and a flood wall is proposed along the Parkway in order to avoid future flooding of the roadway. Route 987D Bridges will be replaced with three span continuous galvanized steel superstructures with concrete slab. East 3 Street Bridge will be replaced with a two span continuous galvanized steel superstructure with concrete deck. Geotechnical Scope The geotechnical scope for the project includes the design and construction of all permanent and temporary substructures, including assessing available information; planning and implementing subsurface investigations; geotechnical analysis and reporting; and protection of existing infrastructure, structures and utilitiesin accordance with the requirements of the RFP. Final analysis results will be included in the Geotechnical Reports under separate covers as per the RFP. in our opinion, assessment of available subsurface information provided by the DOT is limited; therefore, we plan to implement a supplemental exploration program to further investigate the subsurface conditions at all three (3) bridges. The available borings in conjunction with the borings from the supplemental boring program will allow us to establish the geotechnical conditions and perform geotechnical analyses and foundation design. The test borings will be inspected and samples will be classified in accordance with NYSDOT guidelines. Selected samples will be subjected to laboratory testing to evaluate their engineering index parameters. During construction, appropriate means of CONFIDENTIAL INFORMATION SEDGWICK07378 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 construction will be implemented to ensure the protection of existing infrastructure, structures and utilities in accordance with the requirements of the RFP. Geological and Hvdrogeological Project Setting The three (3) proposed bridges are within the Lower Hudson region. They fall within the Manhattan Prong of the Hudson Highlands physiographic provinces where they alllie east of the Hudson River. The geomorphological features predominantly consist of bedrock with superimposed glacial deposits, alluvial deposits, and swamps. Bedrock in Westchester County consists of folded igneous and metamorphic rock dating to the Precambrian to Ordovician epochs. The principal bedrock units are " Fordham Gneiss, Inwood Marble, and Manhattan Schist ["Goeteg, of Moo York Slate Phester Westchester County is within the Hudson River drainage basin and is subject to aquifers through allsoil strata. For the most part bedrock formations encountered in Westchester County are recognized as aquifers. [Perimutter, Nathaniel. "Source of Ground Water in Southeastern New York" (1960): 8-9]. Seismic Setting The new structures seismic design will be in accordance with current AASHTO LRFD codes and standards ~ This section summarizes the general subsurface condition for all three (3) bridges. In general, the subsurface soils at the project limits exhibit favorable engineering characteristics to support replacement bridge structures, and soil settlement is not of concern. For the purpose of engineering analysis, the subsurface soils can be divided into three (3) distinct soil layers that are recognized throughout the project sites: cohesionless soils, weathered rock, and bedrock. The general strata descriptions are summarized in the order they were encountered. A review of existing information indicates that the top stratum consists of cohesionless material primarily containing Sand and Gravel with varying percentages of silt,and at some locations cobbles/boulders were encountered. The cohesionless material was observed at the ground surface at allsites. The thickness of this stratum varies from 19 feet to beyond 67 feet thick at the Route 987D Bridges (5500719 and 5500739) and from 71 feet to 80 feet thick at the E.3" St Bridge (5500050). The relative density varies from loose to very dense based on the existing field SPT data. The cohesionless soil overlies Weathered Rock, which was encountered at all of the sites but not at every borehole location. The stratum varies in thickness from 1 foot to 22 feet and has relative density of dense to very dense with majority being very dense. Underlying the Weathered Rock stratum, bedrock is encountered at varying depths. At the Route 987D Bridges (5500719 and 5500739), depth to bedrock varies approximately from 19 feet to beyond 67 feet. At the E. 3"? StBridge (5500050), depth to bedrock varies approximately from 71 feet to 86 feet. Recovery values vary from 13% to 100%, with most values falling between 50% and 100%. Refer to Appendix B for the existing subsurface exploration information. CONFIDENTIAL INFORMATION SEDGWICK07379 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 Recommendations and Construction Considerations Permanent Bridge Substructures Several foundation alternatives were considered for the proposed substructures. Due to allof the sites having favorable subsurface conditions of attainable bedrock, driven piles to bedrock and drilled shafts socketed into bedrock offer the most practical foundation options. The new substructures at E. 3°? Street Bridge (5500050), as well as the abutments of the Route 987D Bridges (5500719 and 5500739), are proposed to be supported on driven piles. The piers of the Route 987D Bridges (5500719 and 5500739) are envisioned to be supported on drilled shafts used as a single row bent type. The driven piles and drilled shafts will be designed to resist axial and lateral bridge loads in accordance with AASHTO LRFD. Considerations H-Piles Foundation As previously mentioned, foundations supported by H-piles will be driven to bedrock/refusal. A drivability analysis will be performed during final design to verify adequacy of pile installation procedure, as well as determine the pile capacity required and the structural integrity of the piles throughout driving. Additionally, PDA dynamic testing may be required if the tips of any piles are to be terminated in soil. At some locations it is anticipated that piles supporting the integral abutments at the Route 987D Bridges (5500719 and 5500739) will be inserted into pre-excavated holes to accommodate bridge lengths of 100 feet or more and/or to set pile tips below bedrock to achieve lateral stability. Drilled Shaft Foundation Crosshole Sonic Logging (CSL) shall be performed at each drilled shaft conforming to ASTM D6760-08 in order to assess concrete quality. The quality of bedrock is anticipated to vary throughout the project and within the rock sockets of individual shafts. The quality and performance of drilled shafts are sensitive to construction procedures; therefore the selection of drilled shaft techniques used should be carefully considered. An O-cell load test or Statnamic load test may be required on only 1 shaft on the project where its tip is to be terminated in soil. Temporary Bridge Substructures Two temporary structures are projected to be constructed during replacement of the existing structures for staging purposes. At the E. 3'¢ St Bridge (5500050) a single span full width temporary bridge is proposed. The subsurface condition at this project site exhibits favorable engineering characteristics with overburden granular soils at the top and bedrock at a deep depth. Due to the anticipated loads the abutment is proposed to be supported on spread footings situated above temporary Geosynthetically Reinforced Soil System Walls (GRSS walls). The GRSS walls will be designed to resist the additional surcharge loads generated from the bridge loads. At the Route 987D Bridge 5500719 a temporary extension of the bridge is proposed. This site also exhibits favorable soil conditions; based on the CONFIDENTIAL INFORMATION SEDGWICK07380 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 anticipated loads, it is proposed to be supported on spread footings bearing on the overburden soil stratum. Both the GRSS wall at bridge 5500050 and the spread footing supporting bridge 5500719 will be directly supported on the existing ground and evaluated for overturning, sliding, bearing and global stability.Construction considerations for the temporary structures includes removal of any soft or loose material and provide a level surface prior to placement of the spread footings. Subsurface Investigation Geotechnical Subsurface Investigation The proposed subsurface investigation program for the NYSDOT Region 8 Bridge Replacements Design- Build project will be conducted on all three (3) bridges for the purposes of confirming existing information and obtaining additional information in the proposed location of the abutments and piers. The proposed subsurface investigation shall consist of seventeen (17) geotechnical borings. The table below summarizes the proposed boring program. Estimated Soil BIN Boring No. Location Rock Core (ft) Sampling (ft} 5500719)|SMB-1 West Abutment 25 10 5500719|SMB-2 West Abutment 25 10 5500719)|SMB-3 Pier 1 75 20 5500719 |SMB-4 Pier 1 50 20 5500719)|SMB-5 Pier 1 40 20 5500719|SMB-6 Pier 2 75 20 5500719|SMB-7 Pier 2 50 20 5500719|SMB-8 Pier 2 40 20 5500719)|SMB-9 East Abutment 45 10 5500739 |SMB-10 West Abutment 45 10 5500739|SMB-11 Pier 1 45 20 5500739 SMB-12 Pier 2 45 20 5500739|SMB-13 East Abutment 45 10 5500050 HRB-1 West Abutment 85 10 5500050 | HRB-2 Center Abutment 85 10 5500050 HRB-3 Center Abutment 85 10 5500050 |HRB-4 East Abutment 85 10 Field Soil classification and general boring inspection willbe performed by H&H, LLC and willprovide boring logs of each borehole in accordance with ASTM D1i586 Standard Test Method for Standard Penetration Test (SPT). Continuous SPT testing will be performed for the first 12 feet and 24-inch samples taken every 5 feet thereafter. Selected samples will be subjected to laboratory testing including but not limited to Combined Sieve and Hydrometer Analysis, and Unconfined Compressive Strength of Rock. Please refer to Appendix A for the boring location plans. The contractor willobtain allrequired permits including but not limited to the highway work prior to commencement of work. CONFIDENTIAL INFORMATION SEDGWICK07381 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 Environmental Soil Investigation The preliminary soil disturbance estimate for the BIN 5500050 and BINs 5500719 and 5500739 are 5.32 and 7 acres, respectively. The scope of the project includes dredging and excavating of the river bed and riparian areas and use of the excavated/dredged sediments as fillmaterial. EnTech will conduct a Sediment and Soil Investigation, following the New York State Department of Environmental Conservation (NYSDEC) regulations, to determine ifthe dredge sediment is proper for using as fill material, following the generic beneficial use determination (BUD) under NYCRR Part 360-1.15(b)(7). Prior to conducting the investigation, EnTech will prepare two Sampling Plans (one for BIN 5500050 and one for BIN 5500739 and BIN 5500719). The Sampling Plans will include boring locations and depths, number of samples to be collected, Quality Assurance/Quality Control procedures and proposed laboratory testing and analysis. The Sampling Plans will be prepared using the guidance of the NYSDEC Technical and Operational Guidance Series (TOGS) 5.1.9. and will be submitted NYSDEC for review and approval. EnTech willundertake the sampling upon receiving the approval of the Sampling Plans. The collected samples will be sent to a New York State Department of Health (NYSDOH) ELAP certified laboratory for analysis. EnTech will utilize the results of the laboratory analysis to prepare and submit a Soil and Sediment Investigation report, which includes: summary of the investigative findings, description of impacted soils, summary of analytical results in tabular form, comparison of the analytical results with TOGS 5.1.9 and NYSDEC cleanup objective (SCO), a written narrative describing the testing and laboratory findings, boring logs, updated site map depicting soil boring locations, and recommendation for handling and disposal of the contaminated soil as applicable. The prepared report will be submitted to NYCDEC for review and approval. Sampling of the subsurface will be consistent with the geotechnical borings procedures. Bridge ID Environmental Design Boring Number Boring iD Number 10 Number HREBL NA HREG? HRB-2 5500050 HREBS NA HREB4 NA SMEBL | SMB-4 5500719 SMES? SMB-5 SMEB3 SMB-8 SMEB4 SMB-10 5500739 SMEBS SMB-L1 SMEBG SMB-12 Pe pe fb ae af Pee As described in the table above seven (7) of the proposed environmental borings match with the Geotechnical borings and therefore samples collected at these specified locations will be provided to Entech on an as-needed basis in order to perform all necessary testing. Please refer to Appendix C for the Environmental Soil Investigation location plans. CONFIDENTIAL INFORMATION SEDGWICK07382 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 APPENDIX A Proposed Boring Location Plans CONFIDENTIAL INFORMATION SEDGWICK07383 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 BORE HOLE LOCATION PLAN % PROJECT MAWAGER BRIDGES OVER WATER SITE 25 ROUTE 967D (SMRP) OVER SAWMILL RIVER TOWN OF GREENBURGH, WESTCHESTER COUNTY .LN. 5500719 & 5500739 P.ILN. 8BOW.23 CHEER rn MATCHLINE 1 SHER i\ “TPMT7 2 2 OF CHECK INS SNe RS4%, Be at My DESIGN | AW PBT SP Wa Lo] wih eV ~~ I I Voi Weta 3 ah, We Sonn S22 ~ Was on \ ' a \ BAL NA N BAe \ = { \ i % ~ ie i ch & Vy i Wu / 5. viel MigSe iwtS ! \ eit eee Whi AA \ Fh 4 BIN blah! vi 1Afe ve . 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IF AM (TEM BEARING THE STAMP OF A LICERSEG PROFESSIONAL 1S ALTERED, THE ALTERING ENGINEER, ARCHITECT, LANDSCAPE ARCHITECT, OR LARD SURVEYOR SHALL STAMP THE OGCUMENT AND INCLUDE THE NOTATION “ALTERED BY" FOLLOWED BY THEIR SIGNATURE, THE DATE OF SUCH ALTERATION, AMD A SPECIFIC DESCRIPTION OF THE ALTERATION, NAME: + CONFIDENTIAL INFORMATION SEDGWICK07384 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 PROJECT MANAGER CHECK OF 1 2 ORAF TING MATCHLINE SHEET CHECK JOG MANAGER AFFIX SEAL: ALTERED BY: Oe Me DGNRSYTIMESIZ3456 OGNSUSERNAME AS-BUILT REVISIONS Pik 8608.23 CULVERTS: BRIDGES. ft ALL DIMERSIONS IN UNLESS OTHERWISE WOTED CONTRACT HUMBER QESCRIPTION OF ALTERATIONS: 5500739 BORE HOLE LOCATION PLAN = DESIGN SUPERVISOR DRAWING NO. = = = COUNTY: RESTCHESTER SHEET 2 OF 2 NO. USER FILE NAME DATE/TIME {T 1S & TOALTER AN ITEM Ari ae GAY. IF AN TEM BEARINO THE $7. AMP OF IN ANY Se DIRECTION GF & LICENSED PROFESSIONAL ERGINEER, ARCHITECT, OF LA® FOR ANY PERSON, UNLESS THEY ARE ACTING ARCHITECT, OF LAND (ORLAND SURVEYOR FESSIONAL 1S ‘ALTERED, THE ALTERING ENGINEER, ARCHITECT, LANDSCAPE ARCHITECT, BRC STATE DEPARTMENT OF TRANSPORTATION REGION NEW YORE BY THEIR SIGNATURE, THE QATE OF SUCH ALTERATION, AND A ‘SPECIFIC DESCRIPTION GF THE ALTERATION, STAMP THE DOCUMENT AMO INCLUDE THE NOTATION “ALTEREO BY" FOLLOWED SHALL DOCUMENT RABE: + CONFIDENTIAL INFORMATION SEDGWICK07385 FILED: NEW YORK COUNTY CLERK 12/09/2022 08:41 PM INDEX NO. 652321/2020 NYSCEF DOC. NO. 112 RECEIVED NYSCEF: 12/09/2022 NEW YORK STATE OO DEPARTMENT OF TRANSPORTATION I Se BORE HOLE LOCATION PLAN