Specs - Boston Harbor Phase 3 Rock Removal.pdf

Solicitation Number:

W912WJ20B0003

Boston Harbor Navigation Improvement Project – Phase 3, Rock Removal

Boston Harbor Boston, Massachusetts

Construction Solicitation and Specifications

August 2020

Boston Harbor Navigation Improvement Project-Phase 3 Rock Removal

PROJECT TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

00 32 00 GEOTECHNICAL DATA

00 41 00 BIDDING SCHEDULE

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 SUMMARY OF WORK

01 22 00 MEASUREMENT AND PAYMENT

01 30 00 ADMINISTRATIVE REQUIREMENTS

01 32 01 PROJECT SCHEDULE

01 33 00 SUBMITTAL PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00 QUALITY CONTROL

01 45 01 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE(RMS CM)

01 50 00 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS

01 54 50 DREDGING AND DRILL BARGE PLANT AND EQUIPMENT

01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS

01 58 00 PROJECT IDENTIFICATION

01 71 23 FIELD ENGINEERING FOR DREDGING

DIVISION 02 - EXISTING CONDITIONS

02 32 00 SUBSURFACE BORINGS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 20 23 DREDGING

35 20 24 NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM: SCOW -

MONITORING PROFILE

35 25 00 UNDERWATER DIVING WORK

35 30 00 UNDERWATER DRILLING AND CONFINED BLASTING

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1

Boston Harbor Navigation Improvement Project-Phase3 Rock Removal

SECTION TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

DOCUMENT 00 32 00

GEOTECHNICAL DATA

02/13

PART 1 GENERAL

1.1 SUMMARY

1.2 REFERENCES

1.3 EXAMINATION OF SAMPLES

1.4 EXISTING REPORTS AND HISTORICAL DATA

1.5 MATERIAL CLASSIFICATION

1.6 INTERPRETATION

PART 2 PRODUCTS

PART 3 EXECUTION

-- End of Section Table of Contents --

DOCUMENT 00 32 00 Page 1

DOCUMENT 00 32 00

GEOTECHNICAL DATA

02/13

PART 1 GENERAL

1.1 SUMMARY

The material to be removed under this contract is material consisting primarily of rock with limited amounts of ordinary and hard material (clays, silts, sands and gravel) remaining as overburden.

Rock material as defined for this contract consists of rock that shall require blasting, prior to removal by using standard dredging methods.

Engineering properties of the rock are included in the available reports and are summarized in subpart "MATERIAL CLASSIFICATION".

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D2113 (2014) Rock Core Drilling and Sampling of Rock for Site Investigation

ASTM D2487 (2011) Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)

ASTM D2488 (2009a) Standard Practice for Description and Identification of Soils (Visual- Manual Procedure)

ASTM D3148 (2010) Standard Test Method for Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression

ASTM D3967 (2016) Standard Test Method for Splitting Tensile Strength of Intact Rock Core Specimens

ASTM D4543 (2008) Standard Practices for Preparing Rock Core as Cylindrical Test Specimens and Verifying Conformance to Dimensional and Shape Tolerances

ASTM D5731 (2016) Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications

ASTM D7012 (2014) Standard Test Methods for

DOCUMENT 00 32 00 Page 2

Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures

1.3 EXAMINATION OF SAMPLES

Through the above referenced geotechnical data investigations, subsurface explorations were performed by the U.S. Army Corps of Engineers. Pertinent subsurface information is located in the attachment at the end of the specifications.

Soil and rock samples are available for examination by the Contractor at Fort Devens, Massachusetts. Arrangements to see the samples must be made at least seven days in advance by contacting the U.S. Army Corps of Engineers, New England District. The Point-of-Contact is as follows:

Mr. Stephen Potts, Ph.D., P.G.

Telephone 978-318-8311

1.4 EXISTING REPORTS AND HISTORICAL DATA

In addition to data referenced in Section 01 11 00 SUMMARY OF WORK, Subpart "PHYSICAL DATA", existing reports and historical data, relative to the dredging of Boston Harbor are available. Contact the Contract Specialist if you would like to view any of the below listed reports.

- USACE-NED, 1989, Boston Harbor, Massachusetts, Navigation Improvement Project, Feasibility Study. (Study of deepening Reserved Channel, Mystic River/Inner Confluence, and Chelsea River).

- USACE-NED, April 1996, Boston Harbor, Massachusetts, Navigation Improvement Project, Design Memorandum.

- USACE-NAE, March 1998, Boston Harbor Navigation Improvement and Berth Dredging Project, Boston, Massachusetts, Construction Solicitation And Specifications, DACW33-98-B-0004.

- Battelle and Ocean Surveys, Inc., 2003, Geophysical Explorations:

Remote Sensing Archaeological Survey and Geologic Interpretation, Boston Harbor Navigation Improvement Study, Boston, MA. Two volumes:

Geology report by Ocean Surveys Inc., for Battelle, for the US Army Corps of Engineers. Archaeology report by UMASS Archaeological Services for Battelle, for the U.S. Army Corps of Engineers..

- GEI Consultants, Inc. June 2004, Geotechnical Explorations Boston Harbor, Mystic River, and Chelsea River, Navigation Improvement - Feasibility Study, Boston Massachusetts, US Army Corps of Engineers, Contract No. DACW33-02-D-0007, Task Order No. 0011.

- USACE-NAE, November 2006, Rock Removal, Providence River and Harbor and Boston Harbor, Rhode Island and Massachusetts, Construction Solicitation and Specifications, W912WJ-07-B-0001.

- e4Sciences/Earthworks LLC, September 15, 2010, Subsurface Exploration of Boston Harbor Ledge Characterization, Boston, Massachusetts, W912DS-09-0001, DB 01, Task 3 and Option 2.

- e4Sciences/Earthworks LLC, September 15, 2010, Subsurface Exploration of Boston Harbor Ledge Characterization, Boston, Massachusetts, DOCUMENT 00 32 00 Page 3

W912DS-09-0001, DB 01, Task 4 and Option 2, Appendices.

- USACE-NAE, May 2012, Rock Removal, Boston Harbor, Boston Massachusetts W912WJ-12-B-0001, Section 00 32 00 Geotechnical Data.

- USACE-NAE, April 2013, Appendix I, Geology and Geotechnical Investigations, Final Feasibility Report and Final Supplemental Environmental Impact Statement/Massachusetts Final Environmental Impact Report for Deep Draft Navigation Improvement, Boston Harbor, Boston, Chelsea and Revere, Massachusetts.

- USACE-NAE, April 2013, Appendix J, Geophysical Investigations, Final Feasibility Report and Final Supplemental Environmental Impact Statement/Massachusetts Final Environmental Impact Report for Deep Draft Navigation Improvement, Boston Harbor, Boston, Chelsea and Revere, Massachusetts.

- e4sciences/Earthworks LLC, June 15, 2015, Marine Geophysical and Geological Investigation, Boston Harbor, Boston Massachusetts, W912DS-12-D-0002, DB01. Boring locations provided in figure attached to the end of the specifications.

- USACE-NAE, August 2016, Maintenance Dredging Boston Inner Harbor 40-Foot Main Ship Channel,40-Foot Inner Confluence, And 35-Foot Channel, Section 00 32 00 Geotechnical Data, W912WJ-16-B-0018.

USACE-NAE, July 2018, Boston Harbor Improvement Dredging, W912WJ-18-C-0010: Weekly Geologist Report Submittals (Section 35 20 23; par. 1.9)

1.5 MATERIAL CLASSIFICATION

The material classification of the U.S. Army Corps of Engineers material samples was performed in accordance with ASTM D2488 in the field and ASTM D2487 in the laboratory.

The following tests were performed on the recovered samples (see e4sciences report):

- Sediment and Rock Core Logging ASTM D2488, ASTM D2487, and ASTM D2113.

- Rock Quality Designation and Core Recovery and the following rock mechanics laboratory tests:

- Unconfined Compressive Strength w/ Young's Modulus (ASTM D7012, Method D, and ASTM D3148, core preparation by ASTM D4543)

- Point Load Index (ASTM D5731)

- Splitting Tensile Strength (Brazilian) (ASTM D3967)

- Total Hardness

- Unit Weight and Classification Petrographic Analysis (ISRM procedures) Acoustic Velocity

The generalized Boston Harbor stratigraphy is presented in Section 1.2, Table 5, of the 2015 e4Sciences Marine Geophysical and Geological

DOCUMENT 00 32 00 Page 4

Investigation report.

The materials listed below are defined as "Ordinary Material" and may be encountered. From youngest to oldest these materials include Silt, Sands, Gravel, Clay and Silt, Peat, and Boston Blue Clay.

Silt is of Holocene/Recent/Industrial age and are fine-grained organic-rich silt.

Sands are of Holocene/Recent age and are medium grained sand with whole shells, shell material, and sand waves.

Gravel is of Holocene/Recent age and includes sand plus fine gravel, pebbles and cobbles, and reworked till.

Clay and Silt is of Holocene/Recent age and includes estuarine fine-grained deposits.

Peat is of Holocene/Recent age and is composed of organic soils.

Boston Blue Clay is of Pleistocene age and is composed of fine-grained, highly layered, glacial marine clay.

The materials listed below are defined as "Hard Material" and may be encountered. From youngest to oldest these materials include Pleistocene Till #2, Pleistocene Till #1, and Weathered Cambridge Argillite.

Pleistocene Till #2 consists of Pleistocene age till with boulders, gravels and sands.

Pleistocene Till #1 consists of Pleistocene age sandy till.

Weathered Cambridge Argillite is of Neoproterozoic age and is a slightly metamorphosed, weathered, layered, sedimentary rock.

The materials listed below are defined as "Fast Rock". The majority of the material under this contract is anticipated to be "Fast Rock." From youngest to oldest these materials include Jurassic or Paleozoic Diabase and Unweathered Cambridge Argillite.

Jurassic or Paleozoic Diabase is of Mesozoic or Paleozoic age and is a fine grained diabase, intrusive igneous rock with seismic compressional wave velocity greater than 2,700 m/s (8,855 ft./sec).

Unweathered Cambridge Argillite is of Neoproterozoic age and is a slightly metamorphosed, layered, sedimentary rock with seismic compressional wave velocity greater than 2,700 meters per second (8,855ft./sec).

The density of till was estimated based upon N values from SPT blow counts. The estimated density of till ranges from approximately 110 to 130 lbs./cubic ft.

The density of weathered rock was estimated based upon N values from SPT blow counts. The estimated density of weathered rock ranges from approximately 110 to 140 lbs./cubic ft.

The density of Cambridge Argillite fast rock was measured in the laboratory and ranges from 164.5 to 171.6 lbs./cubic ft.

DOCUMENT 00 32 00 Page 5

The density of diabase fast rock was measured in the laboratory and ranges from 175.5 to 177.7 lbs./cubic ft.

During the Phase 2 improvement dredging contract, the majority of "Ordinary Material" and "Hard Material" was removed by ripping, clamshell dredge, and excavator dredge. The rock material left in place is "Fast Rock" which requires pre-treatment prior to mechanical removal. The presence of "Fast Rock" was documented by refusal of an excavator dredge.

1.6 INTERPRETATION

Subsurface investigation data are provided only for information purposes and for the convenience of the Contractor. The data shown on the boring logs are for the specific locations indicated only and no assurance is given that these conditions are representative of conditions between borings or areas adjacent thereto. The responsibility lies with the Contractor to interpret subsurface conditions that may affect his work.

PART 2 PRODUCTS

Not used.

PART 3 EXECUTION

Not used.

-- End of Section --

DOCUMENT 00 32 00 Page 6

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 WORK COVERED BY CONTRACT DOCUMENTS

1.1.1 Project Site Background

1.1.2 Project Description

1.2 FISHERIES PROTECTION WINDOWS

1.3 REFERENCES

1.4 SUBMITTALS

1.5 PHYSICAL DATA

1.6 SUPERINTENDENCE BY THE CONTRACTOR

1.7 SEQUENCING AND SCHEDULING

1.7.1 Waterways Navigation and Marine Traffic Management Plan

1.7.2 Two Week Schedule of Work Activities

1.7.3 Hours of Operations

1.7.4 Restricted Operations Associated with Logan Airport

1.7.5 Work Sequence

1.7.5.1 General

1.7.6 Organization at the Site

1.7.6.1 General

1.7.6.2 Rate of Progress

1.8 CONTRACTOR USE OF PREMISES

1.8.1 Storage Areas

1.8.1.1 Work Limits

1.8.2 Contractor's Receipt of Supplies

1.8.3 Access to Work Site

1.8.4 Protection and Security

1.8.5 Work By Other Contractors

1.8.6 Emergency Contacts

1.8.7 Damaged Property

1.8.8 Contractor's Receipt of Supplies

1.8.9 Daily Clean Up

1.8.10 Government Sanitary Facilities

1.9 QUALITY ASSURANCE

1.9.1 POLICE DETAILS

1.10 COORDINATION

1.10.1 Daily Drill, Blast and Dredge Operations Location Map

1.10.2 South Boston Community Advisory Community Meeting Attendance

1.10.3 Coast Guard

1.10.4 Notice to Mariners

1.10.5 Aids to Navigation

1.10.6 Harbormaster

1.10.7 Boston Lobstermen

1.10.8 Pilots

1.10.9 Weekly Schedule to Users of the Harbor

1.10.10 Points of Contact

1.11 PRE-BLAST STRUCTURE CONDITION SURVEY REPORT

1.12 GENERAL SAFETY REQUIREMENTS

1.12.1 General

SECTION 01 11 00 Page 1

1.12.2 Contractor's Project Superintendent

1.13 ENVIRONMENTAL PROTECTION

1.14 PRECONSTRUCTION CONFERENCE

PART 2 PRODUCTS

PART 3 EXECUTION

SECTION 01 11 00 Page 2

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 WORK COVERED BY CONTRACT DOCUMENTS

The general description below is given to indicate the approximate scope of this project only. It does not limit the work required under the project drawings and specifications.

1.1.1 Project Site Background

The Port of Boston is the largest port in New England and one of the principal ports on the east coast of the United States. Each year more than 16 million tons of cargo (2018) pass through this regional economic anchor.

Over 130 cruise ships visited the Port of Boston in 2019. Users of the harbor include commercial and private fishermen, law enforcement, lobstermen, commuters, sea planes, recreational boaters, swimmers, and many more. Vessel traffic may impact the work under these specifications. The Contractor's effective coordination of blasting and dredging operations with the users of the harbor is essential to the success of this contract.

1.1.2 Project Description

The work of this project is intended to complete the third and final phase of the Boston Harbor Improvement Project authorized by Congress, Section 7002 of the Water Resources Reform and Development Act of 2014, which included deepening and strategic widening, of the Boston Harbor Federal Navigation Project (FNP).

In 2018, the USACE New England District awarded Phase 2 of the Boston Harbor Improvement Project, "Improvement Dredging, Boston Harbor, Boston, Massachusetts" contract to begin the removal of oridinary and hard improvement material. The project features included: deepening and widening the Broad Sound North Channel to -51 feet MLLW, deepening and widening the Main Ship Channel (MSC) to the Conley Terminal, including the turning basin or "MSC Notch", to -47 feet MLLW, and deepening the President Roads Anchorage and the lower Reserved Channel to -47 feet MLLW. In areas where hard material was encountered, the Contract required the Contractor to dredge to a required depth of -53 feet MLLW in the Broad Sound North Channel, and -49 feet MLLW in the remaining areas.

The third phase of the improvement project, this contract, shall remove the remaining material in the FNP to achieve authorized project depth. The project features include: removal of material in the Main Ship Channel (MSC) to the Conley Terminal, including the turning basin or "MSC Notch", to -49 feet MLLW, removal of material in the Reserved Channel to -49 feet MLLW, and removal of material in the President Roads Anchorage to -49 feet MLLW. A CAD file with the -49 foot MLLW Contour Limits will be provided to the Contractor. The Contractor shall be required to remove all material within that limit to -49 feet MLLW, with an allowable 2-foot overdepth.

The Government recognizes that the Contractor's means methods will likely require the Contractor to remove material outside of Government Pay Limit in order to achieve grade, however, the Government will not include any

SECTION 01 11 00 Page 3 material removed outside of the Government Pay Limit in the payment volume. The Government Pay Limit is shown on the Contract drawings, sheet C-301, and further described in Section 35 20 23 DREDGING.

In addition to the improvement work, there is a high spot within the 40-foot Main Ship Channel (MSC). Similar to the other areas, a -42 foot MLLW Contour Limit will be provided, and the Contractor shall be required to remove material within that limit to -42 feet MLLW, with an allowable 2-foot overdepth.

Prior to the commencement of any underwater blasting, all pre-construction submittals shall be submitted and approved, all necessary permits and licenses shall be obtained and submitted, all vibration monitoring equipment shall be installed, and any other necessary documents, coordination or inspections that needs to take place prior to blasting shall be completed

In addition to the work described above, the Contractor shall install all vibration monitoring equipment and hydroacoustic and underwater pressure monitoring equipment prior to beginning any blasting work, other than submittals.

Once the material has been blasted, the Contractor shall use mechanical means to transport and place the material at the Massachusetts Bay Disposal Site (MBDS).

1.2 FISHERIES PROTECTION WINDOWS

Unless otherwise notified by the Contracting Officer, the Contractor shall avoid blasting operations to the maximum extent possible within the Main Ship Channel between Station 350+00 and Station 370+00, from 1 April through 31 May, inclusive, of any year. This time of year restriction will not apply to the Reserved Channel or the Turning Area immediately adjacent to the Black Falcon Cruise Terminal. This shall be reflected in the Contractor's initial Project Schedule and Work Plan and periodic updates, as required by Section 01 32 01 PROGRESS SCHEDULE.

1.3 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Notice to Mariners

SECTION 01 11 00 Page 4

Submit a copy of Notice to Mariners to the Contracting Officer.

Aids to Navigation

Submit proof of coordination with the USCG for any necessary relocation or movement of aids to navigation.

Safe Harbor Plan; G, RO

The Contractor shall submit a Safe Harbor Plan to the Contracting Officer for approval prior to the start of on-site work. The Safe Harbor Plan shall include a written description of the Contractor's plan to provide for the safety and security of floating plant, equipment, and personnel in the event of a storm or other site emergency. The location for the docking of floating plant and the off-loading of equipment and crews shall be clearly indicated.

Marine Traffic Management Plan; G, RO

Daily Drill, Blast and Dredge Operations Location Map; G, RO

The Contractor shall submit a draft map to the Contracting Officer for approval prior to sending to recipients on the distribution list.

Two Week Schedule Of Work Activities; G, RO

1.5 PHYSICAL DATA

Data and information furnished or referred to below is for the Contractor's information. The Government shall not be responsible for any interpretation of or conclusion drawn from the data or information by the Contractor.

a. Site Conditions: The indications of physical conditions on the drawings and in the specifications are the result of site investigations and surveys. The conditions represented prevailed at the time the investigations and surveys were made. Before commencing work at the site, the Contractor shall verify the existing conditions indicated on the drawings and in the specifications. See CONTRACT CLAUSE entitled "SITE INVESTIGATION AND CONDITIONS AFFECTING THE WORK". As-built information and previous inspection reports for structures within the Reserved Channel are available. Contact the Contract Specialist to view these documents.

b. Weather Conditions: The monthly normal mean temperature and the monthly normal mean precipitation for the site may be obtained by the Contractor from the nearest U.S. National Weather Service Office.

c. The average tide range is 9.5 feet with spring tidal ranges often in excess of 11.0 feet. The typical fastest tidal currents in Boston Harbor occur in the deep ship channels (up to 1.4 knots) during spring tides in the southern lane of the Main Ship Channel (Corps/Massport, 1994)

d. Transportation facilities: The Contractor shall make its own investigations on the use of municipal, State and Federal highways, SECTION 01 11 00 Page 5 roads, streets, bridges, and waterways. The Government will not undertake to keep the waterways free from vessels or other obstructions, except to the extent of such regulations, if any, as may be prescribed by the Secretary of the Army, in accordance with the provisions of Section 7 of the River and Harbor Act approved 8 August 1917 (see Title 33, U.S.C.A. Sec. 1).

e. Conditions of Channel: Soundings shown on the contract drawings are the results of surveys conducted during the time period indicated on the drawings and are believed to indicate existing conditions.

Recent work executed to maintain and deepen the Boston Harbor Federal Navigation Project is summarized below:

Contract no. W912WJ-18-C-0010 (expected to be complete by November 2020) "Improvement Dredging, Boston Harbor, Boston, Massachusetts". This contract was awarded in 2018. The work of W912WJ-18-C-0010 consists of the deepening and strategic widening of the Boston Harbor Federal Navigation Project. Project features include deepening and widening the south lane of the Broad Sound North Channel to -51 feet Mean Lower Low Water (MLLW), deepening and widening the Main Ship Channel (MSC) to the Conley Terminal, including the turning basin or "MSC Notch", to -47 feet MLLW, deepening the President Roads Anchorage and the lower Reserved Channel to -47 feet MLLW. Materials removed as a part of this contract include both ordinary and hard materials, removed by mechanical means only. In a limited area located within the Turning Basin, ordinary or hard overburden material remains above the rock to be blasted. In order to estimate the depths of the overburden, test pits were performed in February 2020. Location of Test pits and results of test pits are included in Figure TP-1 attached to the end of the specifications.

Contract no. W912WJ-19-C-0015 "Maintenance Dredging, Boston Harbor, Boston, Massachusetts". This contract was completed in 2020, and consisted of maintenance dredging of the Boston Harbor Federal Navigation Project. Work included dredging the following channels to their full authorized depths, each with a 2-foot allowable overdepth: (1) the north lane of the Broad Sound North Channel to a required depth of -35 MLLW, (2) the Broad Sound South Channel to a required depth of -30 MLLW, (3) the Nubble Channel to a required depth of -15 MLLW, (4) the 35-foot Anchorage to a required depth of -35 MLLW, and (5) the north (35-foot) lane of the Main Ship Channel between the Reserved Channel and the vicinity of Commonwealth Pier

Other less recent USACE works include:

2004-2005: Maintenance dredging of Broad Sound North Channel, the Main Ship Channel seaward of Spectacle Island, and the President Roads Anchorage

2007-2008: Partial removal of rock pinnacles from the Broad Sound North Channel, President Roads Anchorage, and the Main Ship Channel southeast of Castle Island

2008: Maintenance of the 40-foot lane of the main ship channel above Spectacle Island, the 35-foot lane of the main ship channel below the turning basin (MSC Notch), and the Reserved Channel, the

SECTION 01 11 00 Page 6 turning basin or "MSC Notch", and the Drydock Channel

2017: Main Ship Channel CAD Cell construction in the upper inner harbor between Charlestown and East Boston

In addition to the above-summarized USACE works, the following other projects are either ongoing or have been completed in and around the Federal Navigation Project footprint:

Eversource Energy of Westwood, Mass., recently replaced an electric cable from South Boston to Deer Island, Mass. and removed the preceding cable through a combination of dredging and winching. The new cable location has been indicated on the plans.

(status is complete)

Massport's Conley Terminal Berth 10 and 11 improvement projects (status ongoing)

Conley Terminal Berth 16/17 rehabilitation

Conley Terminal Gate Processing Facilities (including the re-construction of the triangular area behind berths 16/17)

Construction at 88 Black Falcon.

Information provided above may not be all inclusive. The Contractor is responsible for obtaining, reviewing and considering all other applicable project(s) in and around the Federal Navigation Project as is necessary to estimate and plan for this contract. Refer to subpart "Work by Other Contractors" in this section for additional information on other work in and around the contract area.

f. Channel Traffic: Boston Harbor and the adjacent areas are mainly used by deep draft commercial vessels, fishing vessels, and numerous small recreation and commercial craft, which may cause some interference with contract operations. Oil barges frequent the harbor during the winter heating season. Certain restrictions on vessel movement are in place when liquid natural gas tankers traverse the harbor. Refer to Subpart "Waterways Navigation and Marine Traffic Management Plan" for more information.

g. Height Limitations: Aeronautical studies with the Federal Aviation Association analyzed if equipment to be used within the contract area would be considered a hazard to air navigation. At the completion of the studies, the FAA issued determination letters regarding the impact to air navigation.

The following aeronautical studies and subsequent determinations, including all restrictions and required mitigation measures that are detailed in the Determinations shall be considered part of this contract.

Details of each Determined Case, which include all restrictions and required mitigation measures, are attached at the end of the specifications.

A map of the study locations is attached at the end the specifications.

Aeronautical Study/Case Numbers:

SECTION 01 11 00 Page 7

2020-ANE-818-OE 2020-ANE-831-OE

2020-ANE-819-OE 2020-ANE-832-OE

2020-ANE-820-OE 2020-ANE-833-OE

2020-ANE-821-OE 2020-ANE-834-OE

2020-ANE-822-OE 2020-ANE-835-OE

2020-ANE-823-OE 2020-ANE-836-OE

2020-ANE-824-OE 2020-ANE-837-OE

2020-ANE-825-OE 2020-ANE-838-OE

2020-ANE-826-OE 2020-ANE-839-OE

2020-ANE-827-OE 2020-ANE-840-OE

2020-ANE-828-OE 2020-ANE-841-OE

2020-ANE-829-OE 2020-ANE-842-OE

2020-ANE-830-OE 2020-ANE-843-OE

1.6 SUPERINTENDENCE BY THE CONTRACTOR

a. At all times during the performance of the contract and until the work is completed and accepted, the Contractor shall directly superintend the work and have on the worksite a competent project superintendent who is satisfactory to the Contracting Officer and has the authority to act for the Contractor.

b. The qualified superintendent, and competent alternate, shall be capable of reading, writing, and conversing fluently in the English language.

c. The project superintendent must have a minimum of 10 years experience in marine work with at least 5 of those years as a superintendent on projects similar in size and complexity. The individual must be familiar with the requirements of EM 385-1-1 and have experience in the areas of hazard identification and safety compliance. The individual must be capable of interpreting a critical path schedule and construction drawings. The qualification requirements for the alternate superintendent are the same as for the project superintendent. The Contracting Officer may request proof of the superintendent's qualifications at any point in the project if the performance of the superintendent is in question.

d. The project superintendent is primarily responsible for managing and coordinating day-to-day production and schedule adherence on the project.

The superintendent is required to attend partnering meetings and quality control meetings.

e. The project superintendent shall maintain a physical presence at the site at all times and be responsible for all construction and related

SECTION 01 11 00 Page 8 activities at the site, except as otherwise acceptable to the Contracting Officer.

f. The Project Superintendent is subject to removal by the Contracting Officer for non-compliance with requirements specified in the contract and for failure to manage the project to insure timely completion.

Furthermore, the Contracting Officer may issue an order stopping all or part of the work until satisfactory corrective action has been taken. No part of the time lost due to such stop orders is acceptable as the subject of claim for extension of time for excess costs or damages by the Contractor.

1.7 SEQUENCING AND SCHEDULING

1.7.1 Waterways Navigation and Marine Traffic Management Plan

The Contractor is required to conduct its work in such manner as to obstruct navigation as little as possible and, in cases when the Contractor's plant so obstructs a channel as to make difficult or endanger the passage of vessels, said plant shall be promptly moved on the approach of any vessel to such an extent as may be necessary to afford a practicable safe passage.

For the purposes of planning and scheduling, the Contractor shall acquaint himself with all available information and regulations pertaining to navigation and vessel traffic within the waterways at the project site.

Sources are provided below but are not all inclusive of available data, which the Contractor is fully responsible for obtaining, reviewing and considering when estimating and planning for this contract.

Historic and scheduled information on cruise ship traffic within the project area may be found at the Massport Flynn Cruiseport website:

http://www.massport.com/flynn-cruiseport/ or by contacting Massport directly.

Historic information on other vessel traffic, such as cargo ships, liquefied natural gas (LNG) tankers, and other container vessels, may be found by contacting the Boston Pilots directly, contact information can be found here: http://www.bostonpilots.com/.

Above information and data furnished by sources or referred to above are provided for the Contractor's information. It is expressly understood that the Government or sources provided will not be responsible for any interpretation or conclusion drawn therefrom by the Contractor.

An initial Marine Traffic Management Plan shall be submitted by the Contractor at the same time as submittal of the Safety and Operational Blasting Plans. Daily updates to the marine traffic management plan are required. The plan shall include, but will not be limited to the following: the location of the Contractor's operations, a detailed scheduled for the area(s) they're currently drilling and subsequently blasting, location of all equipment, dredging activity for the day, surveying activity for the day, procedure for estimated all clear post-blast, and all of the above information for the following day. No drilling or blasting shall begin prior to the Contracting Officer's final review and approval of the Marine Traffic Management Plan.

The Contractor shall expect and include, as a part of this plan, to host and facilitate daily coordination calls and emails that will include

SECTION 01 11 00 Page 9 representatives from USACE and representatives from all or some of the following major stakeholders: USCG, Boston Pilots, MassDOT (ferries), Docking Pilots, and representatives from Massport Conley Terminal, Flynn Cruiseport, and Boston Logan International Airport. At the first coordination call the Contractor shall present the proposed project schedule and compile an email distribution list to provide daily coordination call "Meeting Minutes". The intended outcome of the daily coordination calls is that all entities will have played a role in assisting the contractor to identify the time when drilling and blasting will have the smallest impact possible to the operations of the harbor.

Contractor shall send "Meeting Minutes" to those on the distribution list no later than one hour after each daily coordination meeting closes.

Outside of previously coordinated blasting events, or unless otherwise permitted by the Contracting Officer and the USCG, the channel must be kept open to vessel traffic at all times. It shall be noted that navigational safety takes precedence over dredging and blasting operations.

Upon completion of the work, the Contractor shall promptly remove its plant, including ranges, buoys, piles, and other marks placed by it under the contract in navigable waters or on shore.

1.7.2 Two Week Schedule of Work Activities

In addition to the scheduling and notification requirements specified elsewhere in the contract, the Contractor shall provide to the Contracting Officer, and distribute by email to a distribution list to be provided by the Contracting Officer, a detailed schedule of work activities, which the Contractor intends to perform over the following two week period (Sunday thru Saturday for two weeks). The schedule of work activities shall be updated and submitted by the Contractor to the Contracting Officer on a weekly basis, by noon on every Thursday during the prosecution of work period. The schedule of work activities will be used as the basis for coordinating the Contractor's work with base activities, officials, and occupants. Failure to provide the two-week schedule of work activities may result in a stop work order being issued by the Contracting Officer. The denial of work activities due to the contractor's failure to submit the two-week schedule of work activities shall not be the basis for a government caused delay claim.

1.7.3 Hours of Operations

Except as specified for particular items of work and in the sections below, the Contractor will be allowed to perform non-blasting work 24 hours per day, 7 days per week, including holidays, for the entire performance period. All blasting work shall be conducted between sunrise and sunset, 7 days per week, including holidays, for the entire performance period.

Refer to Specification Sections 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS, 35 20 23 DREDGING, and 35 30 00 UNDERWATER DRILLING AND CONFINED BLASTING for restrictions to blasting, dredging, and disposal activities.

The Contractor shall include five days of no site work in the project schedule to accomodate future events in Boston Harbor. The events and their corresponding times and dates have not yet been determined.

1.7.4 Restricted Operations Associated with Logan Airport

In advance of contract award, USACE New England District initiated aeronautical studies with the Federal Aviation Association to determine if

SECTION 01 11 00 Page 10 equipment to be used within the contract area would be considered a hazard to air navigation. The FAA issued determinations at the completion of these studies. Determinations were issued regarding the impact to air navigation. See Subpart PHYSICAL DATA, g. Height Limitations, for more detail on restrictions and limitations.

Within the areas affected by the Boston Logan International Airport and Massport Aviation Operations, the Contractor may be required to stop work or move position in the event of declining weather conditions that hinder visibility to the extent that the Contractor's plant becomes a hazard to flying aircraft, or any other unforeseen conditions. Close coordination with Logan Operations will be required. Additional compensation will not be due to the Contractor for impacts to the work caused by Massport Aviation Operations.

Prior to the start of work The Contractor shall:

Contact the Boston Air Traffic Control Tower (ATCT) supervisor a minimum of fifteen (15) calendar days prior to the start of work.

Facilitate a meeting with the Contracting Officer, Massport Aviation Operations and the Boston (ATCT) to determine a Standard Operating Procedure for coordination of work within the affected work area. The airport runs multiple runway configurations depending on wind directions and when planning for the crane with respect to airspace, the Contractor shall account for the radius of boom movement that goes beyond the base of the crane as it could create a wider area of higher penetration of airspace. Results from this meeting and the agreed upon standard operating procedure for coordination shall be summarized and submitted as part of the Operational Blasting Plan described in Section

35 30 00 UNDERWATER DRILLING AND CONFINED BLASTING.

Assign a Point-of-Contact (the "POC") who is responsible for communicating with Massport Aviation Operations and the Boston ATCT to coordinate; (1) ongoing work, (2) the next day's work area and (3) any restrictions specific to that work area. The Contractor shall provide complete contact information of the POC including title, name, address, phone number(s) and email. The contractor shall also assign, prior to the start of work, a secondary POC in case the main POC is unavailable. The Contractor shall communicate a minimum of twice daily with Massport Aviation Operations and the Boston ATCT.

Points of Contact for the aforementioned requirements are shown in subpart "Points of Contact" of this section.

At the completion of the work of this contract, the Contractor shall notify the Boston ATCT and Massport Aviation Operations.

1.7.5 Work Sequence

1.7.5.1 General

There are certain time-restrictions relative to the work sequence and time schedule which the Contractor will be required to implement and follow during the prosecution of work. Minor variations in the sequence of the items of work as approved may be made by the Contractor, provided such variations do not conflict with critical elements of the schedule and permit requirements. Variations shall be approved by the Contracting Officer prior to implementation.

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1.7.6 Organization at the Site

1.7.6.1 General

The Contractor shall employ ample personnel and sufficient equipment to accomplish the work of this contract in the least amount of time, within the prosecution period specified in the SPECIAL CONTRACT REQUIREMENTS.

1.7.6.2 Rate of Progress

Should the Contractor fail to maintain a satisfactory rate of progress, the Contracting Officer may require that additional personnel and equipment be placed on the work, in order that the work be brought up to schedule and maintained at no additional cost to the Government. See Subpart WORK COVERED BY CONTRACT DOCUMENTS for additional information.

1.8 CONTRACTOR USE OF PREMISES

1.8.1 Storage Areas

See Section 01 50 00 TEMPORARY FACILITIES AND CONTROLS.

1.8.1.1 Work Limits

The limits of work consist of the Federal Channel and Anchorage limits as shown on the Contract Drawings and as described in Section 35 20 23 DREDGING, paragraph OVERDEPTH AND SIDE SLOPES. In the work areas shown on the contract drawings, the Contracter must achieve the required depth.

1.8.2 Contractor's Receipt of Supplies

The Contractor shall be responsible for all arrangements for the receipt of materials and supplies at the job site. Government personnel are not permitted to receive or sign for items delivered to the site.

1.8.3 Access to Work Site

Prior to the start of work, the Contractor shall ensure that the Government has access to the project site. Access to the project site will be discussed at the Preconstruction Conference. The Contractor shall obtain wharf facilities required for this project.

1.8.4 Protection and Security

a. Protection to Contractor personnel or their equipment cannot be provided at the worksite by the Government.

b. The Contractor shall protect all its personnel, Government personnel, and the general public from injury.

c. The Contractor shall conduct all its work so as to prevent injury or unsafe conditions during construction.

1.8.5 Work By Other Contractors

During the performance period of this contract, other work may be occurring at the Conley Terminal and at the Black Falcon Terminal, both in the Reserve Channel. In addition, dredging disposal activities may be occuring

SECTION 01 11 00 Page 12 at the Main Ship Channel CAD Cell. The Contractor for this project shall plan his work activities to minimize interference with this other work. In case of dispute regarding work operations or the use of work areas, resolution will be by the Contracting Officer and his decision shall be final, with no additional cost to the Government.

1.8.6 Emergency Contacts

The Contractor shall provide a list of emergency contacts in the event of an emergency. The list shall include the contact names, addresses, and telephone numbers. As changes occur and additional information becomes available, correct and change the information contained in previous lists.

1.8.7 Damaged Property

Work shall proceed in a manner which will minimize disturbance or risk of damage to boats, structures, and surrounding lands. The Contractor shall repair such items damaged in the course of carrying out the work at no additional cost to the Government. All repairs shall match similar existing items in all aspects. All replacements shall be in kind.

1.8.8 Contractor's Receipt of Supplies

The Contractor shall be responsible for all arrangements for the receipt of materials and supplies at the job site. Government personnel are not permitted to receive or sign for items delivered to the site.

1.8.9 Daily Clean Up

The Contractor shall at all times keep rubbish from entering surrounding lands and water. Rubbish accumulated at the temporary facilities shall be removed from the premises daily.

1.8.10 Government Sanitary Facilities

Toilet facilities are not available on site for Contractor's use. The Contractor shall provide portable toilets for its personnel and subcontractors as specified in Section 01 50 00 TEMPORARY CONSTRUCTION

FACILITIES AND CONTROLS.

1.9 QUALITY ASSURANCE

a. All items of work not addressed in the contract documents shall be completed in strict accordance with the manufacturers’ specifications.

b. The Government is not obligated to inspect the Contractor’s work, or to protect the Contractor from the consequences of its work. Government inspections are a general examination of the Contractor’s conduct and workmanship and are solely for the purpose of the Government.

Government-designated Quality Assurance Representatives (QARs) do not have the authority to accept work, nor is a Government inspection to be construed as conclusive.

c. Government agents including QARs and project engineers are not authorized to change the contract without the written approval of the Contracting Officer; this lack of authority extends to all situations in which the action of these agents could be construed as constituting a change.

SECTION 01 11 00 Page 13

d. The quality of workmanship is subject to audit by Government or Government-designated QARs at any time during the contract. The Contractor shall cooperate fully and provide all information necessary for this audit.

e. The Contractor shall submit all requests for changes in writing to the CONTRACTING OFFICER. Do not proceed with changes without possession of written authorization of the Contracting Officer.

f. The Contractor shall not conceal any work unless the Contracting Officer has approved all items of work which are to be concealed. The Contractor shall notify the Contracting Officer of its intention to conceal work at least 24 hours in advance of concealment.

1.9.1 POLICE DETAILS

Unless otherwise determined by the USCG Captain of the Port, the Contractor shall expect that two Federal, Commonwealth of Massachusetts, or local law enforcement vessels shall be required to assist in enforcing the Coast Guard Limited Access Area, i.e. Blasting Safety Zone, to keep non-authorized vessels and personnel from entering into the safety zone.

The Contractor shall coordinate with Sergeant Michael Coyne of the Boston Police for Boston Harbor Police details for this project (see point of contact information in Subpart "Weekly Schedule to Users of the Harbor" in this section). The Contractor is responsible for all costs associated with the Boston Harbor Police details.

1.10 COORDINATION

1.10.1 Daily Drill, Blast and Dredge Operations Location Map

The Contractor shall prepare a Drill, Blast and Dredge Operations Location Map (hereafter in this subpart referred to as the "Map") for each work day that drilling, blasting, and/or dredging activities are planned for this contract. The Map shall indicate the locations where drill barges, dredge(s), and scows shall be working during a specific 24 hour period.

The Map shall be sent to a distribution list (to be provided to the Contractor after receipt of the Notice to Proceed) in PDF format. The Map shall be distributed a minimum of 18 hours prior to the start of the period addressed in the specific Map. The plan background shall be the NOAA navigation chart. Information to be shown on the Map shall include, but is not limited to,: all working equipment location, munition storage and transport plans, work footprint, maps, channel stations, etc. A draft will be prepared and submitted to the Contracting Officer for approval prior to the first distribution and start of work. An example Map is attached at the end of the specifications.

1.10.2 South Boston Community Advisory Community Meeting Attendance

Prior to start of work, the Contractor shall expect to attend a South Boston Community Advisory Committee meeting. Attendees of this meeting may include business, government, community and civic representatives with interests in and around the Port of Boston. The Contractor shall be expected to present their Operational Blasting Plan and Schedule, safety precautions, vibration monitoring protocols, etc,. as well as a point of contact and phone number for public questions.

1.10.3 Coast Guard

All work associated with the project shall be coordinated with the U.S.

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Coast Guard.

1.10.4 Notice to Mariners

Before beginning dredging and blasting operations, the Contractor shall coordinate with the U.S. Coast Guard (USGG) to issue a "Notice to Mariners" regarding the work to be performed and the Contractor's proposed operations.

The Corps of Engineers and the USCG have agreed to phraseology when issuing navigational bulletins and notices. The information furnished shall be consistent with USCG Broadcast Notice to Mariners and Local Notice to Mariners. When requesting local USCG offices to issue navigational information for Corps of Engineers work involving marine construction, the following terminology shall be used, as applicable:

For cautionary areas: "Mariners are urged to use extreme caution in the area."

For drilling, blasting, dredging, and work operations: "Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made."

1.10.5 Aids to Navigation

Aids to navigation (beacons, buoys, markers, etc.) have been placed by the USCG in the vicinity of the project area. The Contractor shall not remove, change the location of, obstruct, willfully damage, make fast to, or interfere with these aids to navigation. If the work of this project requires the temporary movement or relocation of any aid to navigation, the Contractor shall notify the USCG and the Contracting Officer of the requirement 30 days in advance, in writing. USCG personnel will then move or relocate the aid to navigation as appropriate for the progress of the work. Under no circumstances shall the Contractor move or relocate an aid to navigation under his own authority with his own personnel. The Contractor shall also contact the USCG at the completion of all work and the removal of all marine plant.

1.10.6 Harbormaster

Before beginning dredging operations and barge transport of dredged materials, the Contractor shall coordinate his work operations with the Boston Harbor Master, Sergeant Michael Coyne, Boston Police Department:

Office: 1-617-343-4721 Cell: 1-857-337-4095 e-mail: michael.coyne@pd.boston.gov

1.10.7 Boston Lobstermen

A minimum of three days before beginning dredging operations and barge transport of dredged materials, the Contractor shall send out a notice with a map showing the locations in which the Contractor is expected to be drilling, blasting and dredging, including anticipated scow transit lanes, for the next seven (7) days to a list of e-mail recipients that will be provided by the Government after Notice to Proceed (NTP). A point-of-contact and contact information shall be provided with each distribution. Once dredging operations are underway, the Contractor shall provide a weekly update to the map via e-mail to the mailing list by 8:00 p.m. each Thursday for the following Sunday to Saturday period. If for

SECTION 01 11 00 Page 15 unforeseen reasons, the Contractor needs to move into an area that was not identified in the weekly update, the Contractor, insofar as possible, shall send out another notice 18 hours in advance of moving into the added area.

Additionally, the Contractor shall make two daily broadcasts (8:00 a.m. and 1:00 p.m.) on two different VHF radio channels used by the loberstermen, providing daily updates. The channels used for these broadcasts will be identified in the pre-construction conference.

Finally, the Contractor shall be responsible for all coordination with the Boston Lobstermen regarding Gear Conflict or…