Specs.pdf

Solicitation No.:

W912WJ21B0015

MAINTENANCE AND IMPROVEMENT

DREDGING

Portsmouth Harbor and Piscataqua River Newington, New Hampshire and Eliot, Maine

Construction Solicitation and Specifications

August 2021

IMPROVEMENT AND MAINTENANCE DREDGING

PORTSMOUTH HARBOR AND PISCATAQUA RIVER, NH/ME AUGUST 2021

PROJECT TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

00 32 00 GEOTECHNICAL DATA

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 SUMMARY OF WORK

01 22 00 MEASUREMENT AND PAYMENT

01 30 00 ADMINISTRATIVE REQUIREMENTS

01 33 00 SUBMITTAL PROCEDURES

01 33 29 SUSTAINABILITY REPORTING

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 FOR

DREDGING WORK AND OPEN WATER DISPOSAL

01 50 01 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS FOR BEACH

FILL PLACEMENT WORK

01 54 50 DREDGING PLANT AND EQUIPMENT

01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS

01 71 23 FIELD ENGINEERING FOR DREDGING

01 71 24 FIELD ENGINEERING FOR BEACH FILL PLACEMENT

01 74 19 CONSTRUCTION WASTE MANAGEMENT AND DISPOSAL

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 20 23 MECHANICAL DREDGING

35 20 24 NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM SCOW -

MONITORING PROFILE

35 20 25 NATIONAL DREDGING QUALITY MANAGEMENT PROGRAM PIPELINE

HYDRAULIC DREDGE

35 20 26 BEACH FILL PLACEMENT

35 25 00 UNDERWATER DIVING WORK

35 30 00 UNDERWATER DRILLING AND CONFINED BLASTING

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS

ISSUED FOR SOLICITATION

SECTION TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

SECTION 00 32 00

GEOTECHNICAL DATA

PART 1 GENERAL

1.1 SUMMARY

1.2 REFERENCES

1.3 GEOTECHNICAL SUBSURFACE INVESTIGATIONS

1.3.1 General

1.3.2 Sample Testing

1.3.3 Geotechnical Reports

1.3.4 Examination of Samples

1.4 SOIL AND ROCK CLASSIFICATION

1.5 INTERPRETATION

1.6 LABORATORY SOIL TESTS

PART 2 PRODUCTS

PART 3 EXECUTION

-- End of Section Table of Contents --

DOCUMENT 00 32 00 Page 1

SECTION 00 32 00

GEOTECHNICAL DATA

PART 1 GENERAL

1.1 SUMMARY

The surface conditions indicated in the contract drawings and in the specifications are the result of site surveys, probes, borings, laboratory tests. Logs of explorations, laboratory test results, and locations at the site where subsurface investigations were performed can be found at the link provided below under subpart "Geotechnical Reports". Boring locations are shown on Contract Drawing sheet G-002 for reference only.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referenced to 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) Soils for Engineering Purposes (Unified Soil Classification System)

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

ASTM D2845 (2008) Pulse Velocities and Ultrasonic Elastic Constants of Rock

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

ASTM D422 (1963; R 2007; E 2014; E 2014)

Particle-Size Analysis of Soils

ASTM D4318 (2017) Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

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

ASTM D7012 (2014) Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures

DOCUMENT 00 32 00 Page 2

ASTM D7625 (2010) Standard Test Method for Laboratory Determination of Abrasiveness of Rock Using the CERCHAR Method

1.3 GEOTECHNICAL SUBSURFACE INVESTIGATIONS

1.3.1 General

The U.S. Army Corps of Engineers, New England District (USACE-NAE) and its contractor's Ocean Survey, Inc. (OSI) and GZA GeoEnvironmental, Inc. (GZA) conducted geotechnical investigations in 2006 and 2007, and 2016, respectively, within the proposed footprint of the turning basin expansion area. Results of the geotechnical investigations can be found in geotechnical reports by OSI and GZA (refer to subpart below titled "Geotechnical Reports" for OSI and GZA report titles and how to obtain the reports). Bathymetry data were collected by USACE-NAE.

An independent geotechnical investigation was conducted by the Massachusetts Department of Conservation and Recreation (DCR) and its contractor Louis Berger in 2017 (refer to subpart below titled "Geotechnical Reports" for Louis Berger report title and how to obtain the report). USACE-NAE was not party to the Louis Berger work and had no input to the scoping, execution, review, or conclusions of the report.

1.3.2 Sample Testing

The following tests were performed on the recovered samples (see GZA GeoEnvironmental 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:

Elastic Moduli in Uniaxial Compression ( ASTM D7012) Axial Point Load Index ( ASTM D5731) Diametral Point Load Index ( ASTM D5731) Splitting Tensile Strength ( ASTM D3967) Hardness (Tarkoy) CERCHAR Abrasivity ( ASTM D7625) Average Dry Unit Weights (ISRM 3 Method) Average Bulk Specific Gravity (ISRM 3 Method) Average Porosity (ISRM 3 Method) Petrographic Analysis (ISRM procedures) Pulse Velocity and Ultrasonic Elastic Constants ( ASTM D2845)

1.3.3 Geotechnical Reports

In addition to basic data referenced in Section 35 20 23 MECHANICAL DREDGING under part "MATERIALS TO BE DREDGED", the geotechnical reports listed below are available for viewing. Bidders may obtain a copy of the geotechnical reports at the following public website:

https://www.nae.usace.army.mil/Missions/Projects-Topics/Portsmouth-Harbor/

- OSI's "Final Report, Marine Geophysical Investigation, Navigation Channel Improvement Project, Piscataqua River, Portsmouth, New Hampshire, OSI Report No. 06ES102-NH", September 2008.

DOCUMENT 00 32 00 Page 3

- GZA's "Report of Geotechnical Explorations, Portsmouth Harbor Turning Basin and Piscataqua River Subsurface Investigation, Newington, NH and Eliot, ME", October 2016

- Louis Berger's "Suitability Assessment of Piscataqua River Sand Source for Nourishment of Nantasket Beach", February 2018.

1.3.4 Examination of Samples

Soil and rock samples of OSI and GZA geotechnical investigations are available for examination by the Contractor at U.S. Army Garrison Fort Devens, Massachusetts. Arrangements to see the samples shall be made at least 7 days in advance by contacting the U.S. Army Corps of Engineers, New England District. Contact is as follows:

Mr. Stephen Potts, Ph.D., P.G.(Telephone 978-318-8311).

1.4 SOIL AND ROCK CLASSIFICATION

Soil classification was performed in accordance with ASTM D2488 in the field and ASTM D2487 in the laboratory.

The generalized Portsmouth Harbor stratigraphy is presented in Section 5.0, Table 2, and Figures 4 and 5 of the 2016 GZA GeoEnvironmental Report of Geotechnical Explorations.

For dredging purposes the materials listed below are defined as "Ordinary Material".

From youngest to oldest these materials include: Shoaled material, Glaciomarine Clay; Glaciofluvial/Glaciomarine Outwash; and Glacial Till.

Glaciomarine Clay is of Pleistocene age and is a lean clay with sand or gravel with low N values indicative of very soft to soft clay. The glaciomarine clay is equivalent to the Presumpscot Formation which is a gray and blue-gray (weathering brown) silt, clay, and sand deposited on the sea floor, and ranges from massive to laminated silt and clay that occurs as a blanket deposit over bedrock and older glacial sediments. The Presumpscot Formation may locally contain boulders, sand, and gravel.

Glaciofluvial/Glaciomarine Outwash is of Pleistocene age and is a stratified sand and gravel deposit consisting of fine to coarse sand with fine gravel and silt ranging from loose to very dense. The glaciofluvial/glaciomarine outwash is equivalent to on-shore units mapped in Maine as Marine Regressive Sand Deposits and is described as massive to stratified and cross-stratified, well-sorted, brown to gray-brown sand.

Glacial Till is of Pleistocene age and consists of dense silty gravel and sand. The material has been describes as a poorly sorted mixture of silt, sand, clay, cobbles and boulders, typically not stratified.

For dredging purposes the rock materials listed below are defined as "Hard Material".

From youngest to oldest these materials include Basalt and Phyllite of the Eliot Formation.

DOCUMENT 00 32 00 Page 4

Basalt consists of isolated, intrusive, dikes and/or sills of altered basalt. Basalt dikes have been mapped nearby on-shore within the Eliot Formation.

Phyllite consists of altered carbonate-sericite-quartz schist. The phyllite was described as gray, hard, fresh to slightly weathered, and fine grained. Discontinuities were closely to very closely spaced, ranging from low to high angle with some vertical joints. Joint surfaces ranged from planar and smooth to stepped and rough. Joint surface weathering ranged from fresh to discolored and apertures ranged from tight to open. The Eliot Formation consists of gray to green phyllite, calcareous quartzite, quartz-mica schist, and well bedded calc-silicate.

1.5 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 the work.

1.6 LABORATORY SOIL TESTS

Laboratory tests of soils were generally performed in accordance with the following test methods:

a. Particle-Size Analysis: ASTM D422.

b. Atterberg Limits: ASTM D4318.

c. Classification of Soils for Engineering Purposes (Unified Soil Classification System): ASTM D2487.

d. Classification: AASHTO (Standard test methods pertaining to soils and aggregate)

Note: Not all samples were tested in the laboratory using all the methods described above.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

Not Used

-- End of Section --

DOCUMENT 00 32 00 Page 5

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 PROJECT LOCATION

1.2 PILOT AND PILOTAGE

1.3 MARINE TRAFFIC CONTROL AND COMMUNICATION

1.4 WORK COVERED BY CONTRACT DOCUMENTS

1.4.1 General

1.4.2 Work Restrictions

1.4.3 General Description of Work

1.4.3.1 BASE BID ITEMS

1.4.3.2 OPTIONAL BID ITEMS

1.5 REFERENCES

1.6 SUBMITTALS

1.7 PROJECT SITE CONDITIONS

1.7.1 Physical Data

1.8 WORK COMMENCEMENT AND COMPLETION REQUIREMENTS

1.9 WORK SEQUENCING AND SCHEDULING

1.9.1 Work Sequence

1.9.1.1 Base Bid Items (Optional Items 0004 and 0005 NOT AWARDED)

1.9.1.2 Base Bid Items (Optional Items 0004 and 0005 AWARDED)

1.9.2 Hours of Operations

1.9.3 Scheduling

1.9.3.1 Initial Project Schedule

1.9.4 Rate of Progress

1.10 PRE-DREDGING PHOTOGRAPHIC SURVEY

1.11 SUPERINTENDENCE BY THE CONTRACTOR

1.12 WORK SITE AND CONTRACTOR'S USE OF PREMISES

1.12.1 General

1.12.2 Staging and Storage Areas

1.12.3 Work Limits

1.12.4 Access to Work Site

1.12.5 Protection and Security

1.12.6 Work By Other Contractors

1.12.7 Emergency Contacts

1.12.8 Damaged Property

1.12.9 Contractor's Receipt of Supplies

1.12.10 Daily Clean Up

1.12.11 Government Sanitary Facilities

1.13 CONTRACTOR'S USE OF UPLAND FACILITIES AND HAULING ROUTES

1.14 QUALITY ASSURANCE

1.15 LIFT BRIDGE OPERATIONS

1.15.1 General

1.15.2 Memorial Bridge

1.15.3 Sarah Mildred Long Bridge

1.16 COORDINATION

1.16.1 Daily Dredge Operations Location Map (DOLM)

1.16.2 Public Notice

1.16.3 Coast Guard

1.16.4 Notice to Mariners

1.16.5 Aids to Navigation

SECTION 01 11 00 Page 1

1.16.6 Points of Contact

1.17 GENERAL SAFETY REQUIREMENTS

1.17.1 General

1.17.2 Contractor's Project Superintendent

1.18 ENVIRONMENTAL PROTECTION

1.19 COORDINATION AND DIRECTION DURING CONSTRUCTION

1.20 PRECONSTRUCTION CONFERENCE

PART 2 PRODUCTS

PART 3 EXECUTION

-- End of Section Table of Contents --

SECTION 01 11 00 Page 2

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 PROJECT LOCATION

The Piscataqua River forms a portion of the state boundary between Maine and New Hampshire. Formed by the confluence of the Salmon Falls and Cocheco rivers, the Piscataqua River originates at the boundary of Dover, New Hampshire, and Eliot, Maine, and flows southeasterly for 13 miles to Portsmouth Harbor, comprising a partial border between the two states.

The last 8.8 miles of the Piscataqua River constitute Portsmouth Harbor, which stretches across New Castle, Portsmouth, and Newington, and the Maine communities of Kittery and Eliot.

Portsmouth Harbor, located at the mouth of the Piscataqua River, is about 45 miles northeast of Boston Harbor, Massachusetts, and 37 miles southwest of Portland Harbor, Maine.

1.2 PILOT AND PILOTAGE

a. All vessels, except pleasure or fishing vessels or vessels of 150 gross tons or under, are required to be piloted by a pilot appointed by the Pease Development Authority (PDA) into and out of the Piscataqua River and harbor.

b. PDA Appointed Pilots for Vessels Over 150 Gross Tons

(1) Each vessel of over 10,000 gross tons shall be piloted by a class I pilot as described in PDA 305.01(c).

(2) Each vessel from 150 to 10,000 gross tons shall be piloted by a class I or class II pilot as described in pilot and pilotage rules PDA 305.01(c).

(3) Pilot and pilotage rules can be found under "PDA 300 PILOT AND PILOTAGE RULES" at the following website:

https://peasedev.org/division-of-ports-harbors/#pilotPilotage

c. The pilot may also be licensed through the U.S. Coast Guard with endorsement for class I Pilotage for the Piscataqua River.

1.3 MARINE TRAFFIC CONTROL AND COMMUNICATION

a. This project requires that all movements of the Contractor's plant and equipment and set-up within the confines of the channel and turning basin areas, and approaches to and from the harbor entrance, be continually coordinated with the Pease Development Authority (PDA), Division of Ports and Harbors and the U.S. Coast Guard. Points of contact are listed below.

b. The Contractor shall continually monitor the harbor's radio communications and shall establish and maintain radio communication with PDA's traffic control dispatcher(s) and the U.S. Coast Guard for

SECTION 01 11 00 Page 3 the duration of the project.

c. The Contractor will be required at times to stop work and move its plant and equipment to provide clearance within the channel or turning basin for marine traffic. Such movements shall be accomplished by the Contractor as quickly as possible in the interest of marine safety.

1.4 WORK COVERED BY CONTRACT DOCUMENTS

1.4.1 General

a. The Base Bid work involves the dredging of ordinary shoaled material at the upper end of Portsmouth Harbor Federal Navigation Project (FNP) which includes the existing turning basin and a short portion of existing channel just prior to the existing turning basin; the dredging of ordinary and hard (rock) materials to expand the area of the aforementioned existing turning basin; and the disposal of dredged ordinary material and hard (rock) material at the Isles of Shoals North (IOS-N) Disposal Site. Refer to Contract Drawing sheet G-002 for location of dredging work at the upper end of the FNP.

(1) The Contractor shall be aware that the fast currents in the channel, typically 5 knots or greater, could potentially make the work difficult. Prior to the start of construction, the Contractor shall become familiar with the project site.

b. The project also includes Optional Bid work, that if awarded, will involve taking a specified volume from the total volume of the dredged ordinary material that was to be disposed of at the Isles of Shoals North (IOS-N) Disposal Site under the Base Bid and disposing of the specified volume amongst three separate disposal sites: Nantasket Beach in Hull, Massachusetts; Salisbury Nearshore Disposal Site just offshore of Salisbury Beach in Massachusetts; and Newbury Nearshore Disposal Site just offshore of Plum Island in Massachusetts.

c. Due to environmental windows and the relatively long haul from the dredge site to Nantasket Beach and back, the time needed to complete the work may require two dredge seasons (2021/2022 and 2022/2023).

Whether one or two dredge seasons will be necessary shall be left at the discretion of the Contractor and his means and methods chosen to complete the work. If the low bidder's price includes a second dredge season, the contract will be modified to extend the performance period an additional 364 days.

(1) If Optional Bid Items 0004 and 0005 are awarded and the Contractor chooses to complete the work in two dredge seasons, all work to transport, and place and grade ordinary material on Nantasket Beach shall be completed within the first dredge season (2021/2022).

(2) The additional 364 days includes 196 calendar days of non-dredge days due to the environmental time of year restriction (No Dredge Season) of 2 April 2022 through 14 October 2022, and 168 calendar days of dredging and disposal from 15 October 2022 to 1 April 2023.

d. The description of the work as follows is general in nature and is only given to indicate the approximate scope of work under this contract. The general description below neither provides the work sequence (refer below to subparagraph titled "Work Sequence") nor the complete contract work as required under the Contract Drawings and

SECTION 01 11 00 Page 4

Specifications. Location and description for each disposal site can be found in Section 35 20 23 MECHANICAL DREDGING.

e. The project description is further defined in the Contract Drawings and Specifications.

1.4.2 Work Restrictions

a. The work described below must commence and be completed within specified environmental windows in order to minimize interference with, disturbance to, and damage to particular species of fish, marine mammals, birds, and other aquatic wildlife.

b. Refer to subparagraph titled "Environmental Windows" in Section 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS for designated environmental windows pertaining to dredging, drilling, blasting, and disposal work.

1.4.3 General Description of Work

1.4.3.1 BASE BID ITEMS

Refer to Section 01 22 00 for a description and breakdown of what is part of the pricing for each Base Bid Item.

a. Mobilization and Demobilization (See Base Bid Item 0001 on Bid Schedule)

(1) Perform mobilization and demobilization as necessary to complete all base bid contract work in accordance with the contract documents.

(2) If the Contractor elects to include a second dredge season to complete the work, the costs associated with the second mobilization and demobilization will be included so that the total price for Base Bid Item 0001 is for two mobilizations and two demobilizations. Refer above to subpart c under subpart "General".

b. Dredging of Ordinary Material and Ocean Disposal Work ( See Base Bid Item 0002 on Bid Schedule )

(1) Perform maintenance dredging work in the existing 35-foot federal navigation channel (from approximately Station 285+00 to Station 309+67) and the existing 35-foot turning basin (from Station 309+67 northwesterly), to the required depth of -35 feet Mean Lower Low Water (MLLW) with an allowable overdepth of two feet to -37 feet MLLW to remove approximately 2,300 cubic yards of shoaled material as indicated on the Contract Drawings and Section 35 20 23 MECHANICAL DREDGING. Shoaled material removed shall be loaded into scows, and transported to and disposed of at the Isles of Shoals North (IOS-N) Disposal Site. Disposal at the IOS-N shall be within the designated disposal target site titled "PORTSMOUTH/PISCATAQUA DISPOSAL TARGET 500 FT RADIUS" as shown on the sketch attached at the end of this specification section. The target site coordinates for this disposal location can be found on Contract Drawing sheet C-103.

(2) Perform improvement dredging to remove approximately 674,800 cubic yards of ordinary material within the lines of the specified expanded footprint to the required depth of -35 feet MLLW with an allowable overdepth of two feet to -37 feet MLLW and dispose of

SECTION 01 11 00 Page 5 dredged ordinary material at the Isles of Shoals North (IOS-N) as indicated on the Contract Drawings and as specified in Section 35 20 23 MECHANICAL DREDGING. Disposal at the IOS-N shall be within the designated disposal target site titled "PORTSMOUTH/PISCATAQUA DISPOSAL TARGET 500 FT RADIUS" as shown on the sketch attached at the end of this specification section. The target site coordinates for this disposal location can be found on Contract Drawing sheet C-103. Refer to Section 00 32 00 GEOTECHNICAL DATA for soil classification and definition for the types of ordinary material to be encountered during dredging operations.

(3) Perform progress survey(s) in accordance with Section 01 71 23

FIELD ENGINEERING FOR DREDGING.

(4) Quantity of ordinary material noted above under subparts (1) and

(2) includes both the required depth and overdepth quantities.

c. Dredging of Hard (Rock) Material and Ocean Disposal Work ( See Base Bi d I t em 0003 on Bi d Schedul e)

(1) Perform dredging and pre-treatment, if necessary, to remove approximately 14,700 cubic yards of hard (rock) material to a depth of -37 feet MLLW with an allowable overdepth of two feet to -39 feet MLLW by using mechanical means (such as hoe-ramming, ripping, or splitting) or drilling and blasting, or a combination of methods to the specified depths. The Contractor is encouraged to utilize rock removal techniques that will limit the amount of blasting required for this project. The Contractor shall be aware that drilling and confined blasting of the hard (rock) material may require underwater diving; refer to Section 35 25 00 UNDERWATER DIVING WORK. Before commencing with any underwater blasting, all pre-construction submittals including pre-rock removal surveys shall be submitted and approved, all necessary permits and licenses shall be obtained and submitted, all vibration monitoring equipment and hydroacoustic and underwater pressure monitoring equipment shall be installed, and any other necessary documents, coordination, or inspections that needs to take place prior to blasting shall be completed. The Contractor shall coordinate all pre-blasting and blasting work with the Contracting Officer and the Pease Development Authority Harbormaster. Quantity of hard (rock) material noted above includes both the required depth and overdepth quantities.

(2) Once hard (rock) material has been pre-treated using mechanical methods and/or drilling and blasting, the Contractor shall use mechanical equipment to remove and load the rock material onto scows/barges, and transport it to and dispose of it at the Isles of Shoals North (IOS-N) Disposal Site. Disposal at the IOS-N shall be within the designated disposal target site titled "ROCK PLACEMENT AREA 500 FT RADIUS" as shown on the sketch attached at the end of this specification section. The target site coordinates for this disposal location can be found on Contract Drawing sheet C-103.

(3) Perform progress survey(s) in accordance with Section 01 71 23

FIELD ENGINEERING FOR DREDGING.

d. If Optional Bid Items 0004 and 0005 ARE NOT AWARDED, the general

SECTION 01 11 00 Page 6 description of the work stops here and the total volume of 674,800 cubic yards of dredged ordinary material removed from the turning basin expansion area shall be transported to and disposed of at Isles of Shoals North (IOS-N).

e. If Optional Bid Items 0004 and 0005 ARE AWARDED, the general description of the work is continued below under subparagraph titled "Optional Bid Items" and becomes part of this contract. With the award of Optional Bid Item 0005, the turning basin expansion area will be broken up into five Regions, R1 through R5 (see Detail C7 on Contract Drawing sheet C-101 for location of each region within the turning basin expansion area). Of the total volume of 674,800 cubic yards of dredged ordinary material from the turning basin expansion area, 492,500 cubic yards of the dredged ordinary material will be divided up and transported to and disposed of at three separate disposal site locations: Nantasket Beach in Hull, Massachusetts;

Salisbury Nearshore Disposal Site just offshore of Salisbury Beach in Massachusetts; and Newbury Nearshore Disposal Site just offshore of Plum Island in Massachusetts (refer below under subpart titled "Transportation and Disposal of Dredged Ordinary Material"). The remaining volume of 182,300 cubic yards of dredged ordinary material will be transported and disposed of at the Isles of Shoals North (IOS-N) Disposal Site under Base Bid Item 0002. Note to Bidder: all dredging work will be under Base Bid Item 0002.

1.4.3.2 OPTI ONAL BI D I TEMS

Refer to Section 01 22 00 for a description and breakdown of what is part of the pricing for Optional Bid Items.

a. Mobilization and Demobilization ( See Opt i onal Bi d I t em 0004 on Bi d Schedule )

(1) Perform mobilization and demobilization as necessary to complete the following work: transport a specified volume of ordinary material as measured in place at the dredge site to Nantasket Beach, and the Salisbury and Newbury Nearshore Disposal Sites;

placement and grading of ordinary material on Nantasket Beach; and the disposal of ordinary material at the Salisbury and Newbury Nearshore Disposal Sites.

b. Transportation and Disposal of Dredged Ordinary Material ( See Opt i onal Bi d I t em 0005 on Bi d Schedul e)

(1) General:

(a) All dredging work to remove ordinary material will be paid for under Base Bid Item 0002.

(b) The quantity of ordinary material to be placed at each disposal site, as specified below, shall be ordinary material that is measured in place at the dredge site from within the turning basin expansion area (see Detail C7 on Contract Drawing sheet C-101). Refer below to subpart "Base Bid Items with Optional Items 0004 and 0005 AWARDED" under subpart "Work Sequence" for the regions that make up the quantities noted below.

(c) Refer below to subpart "Base Bid Items with Optional Items 0004 and 0005 AWARDED" under subpart "Work Sequence" for required

SECTION 01 11 00 Page 7 sequence of work.

(2) Transport and Placement at Nantasket Beach

(a) Transport 300,000 cubic yards of ordinary material from the dredge site to Nantasket Beach. Hydraulically place, spread, and grade 300,000 cubic yards of ordinary material on Nantasket Beach within the designated limits and location along the beach to the lines, grades, and slopes as indicated on Contract Drawings C-102, C-103, and C-303, and as specified in Section 35 20 26 BEACH FILL PLACEMENT. Perform field engineering and survey work in accordance with Section 01 71 24 FIELD ENGINEERING FOR BEACH FILL

PLACEMENT.

(b) Refer to general notes on sheet C-102 for Contractor's responsibility for loss of ordinary material following Contracting Officer's acceptance of material placement along beach.

(3) Transport and Disposal at Salisbury and Newbury Nearshore Disposal Sites

(a) Transport 192,500 cubic yards of ordinary material from the dredge site to the Salisbury and Newbury Nearshore Disposal Sites and dispose of the 192,500 cubic yards of ordinary material at the Salisbury and Newbury Nearshore Disposal Sites. Of the 192,500 cubic yards, dispose approximately 50 percent of it at the Salisbury Nearshore Disposal Site (Salisbury, Massachusetts) and approximately 50 percent of it at the Newbury Nearshore Disposal Sites (Newbury, Massachusetts).

(b) Refer to sketch titled "Nearshore Disposal Site Locations" attached at the end of this specification section. Target site coordinates can be found on Contract Drawing sheet C-103.

Disposal requirements for each nearshore disposal site can be found in Section 35 20 23 MECHANICAL DREDGING under subparagraph titled "Nearshore Disposal Sites".

c. Geotechnical Field Technician ( See Opt i onal Bi d I t em 0006 on Bi d Schedule )

Refer to Section 35 20 23 MECHANICAL DREDGING for details.

1.5 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

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

33 CFR 117.11 Unnecessary Opening of The Draw

33 CFR 117.531 Piscataqua River

SECTION 01 11 00 Page 8

1.6 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

Initial Project Schedule ; G, RO

In accordance with the contract clauses, the Contractor shall, within 5 days after receipt of Notice to Proceed (NTP) or as otherwise determined by the Contracting Officer, submit for approval a practicable project schedule. When changes are authorized that result in contract time extensions, the Contractor shall submit a revised project schedule for approval by the Contracting Officer.

Pre-Dredging Photographic Survey ; G, RO

The Contractor shall submit a pre-dredging photographic survey as described in this section.

Public Notice ; G, RO

Submit a copy of the proposed wording of the Public Notice to the Contracting Officer for approval.

Notice to Mariners

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.

Utility Plan

SD-07 Certificates

Periodic Schedule Updates ; G, RO

SECTION 01 11 00 Page 9

1.7 PROJECT SITE CONDITIONS

1.7.1 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. A pre-dredge survey may be performed by the Government prior to the start of Contractor dredging operations at the site. 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".

b. Weather Conditions: Weather conditions for the site may be obtained by the Contractor from the National Oceanic and Atmospheric Administration's National Weather Service; www.NOAA.gov.

c. Tide Conditions: The mean tidal range in the project area is 6.4 feet mean higher high water (MHHW) to mean lower low water (MLLW). Tidal currents in the dredging areas are extremely strong and are typically 5 knots or greater. The site of the work is sheltered from the worst effects of coastal storms. Predicted times and heights of tides for each day of the year can be obtained from the National Oceanic and Atmospheric Administration, National Ocean Service, "Tidal Current Tables, Atlantic Coast of North America."

d. Transportation facilities: The Contractor shall make its own investigations on the use of local, State and Federal highways, roads, streets, bridges, and waterways.

e. Conditions of Channel: The Federal Navigation Channel was last maintained in 2013. Soundings shown on the Contract Drawings are the results of surveys conducted during the time period indicated on the Contract Drawings and are believed to indicate existing conditions.

f. Channel Traffic:

(1) Portsmouth Harbor is used extensively by deep draft vessels including petroleum tankers with drafts of 30 to 36 feet, a large lobstering fleet, charter fishing vessels, commercial fishermen, excursion boats to the Isles of Shoals situated nine miles offshore, and local and transient boats based at or visiting the nearly 20 boating facilities in the area. The harbor is also used by submarines from the Portsmouth Naval Shipyard in Kittery and for fuel deliveries to Pease International Tradeport in Newington.

(2) The Government will not undertake to keep the channel free from vessels or other obstructions, except to the extent of applicable regulations. The Contractor shall conduct the work in such a manner as to obstruct navigation as little as possible, and in the event the Contractor's plant so obstructs the channel as to make difficult or endanger the passage of any vessels, the plant shall be promptly moved on the approach of any vessel to such an extent as may be necessary to

SECTION 01 11 00 Page 10 afford a practicable passage.

(3) Daily channel traffic and vessel movements shall be coordinated with the Pease Development Authority (PDA), Division of Ports and Harbors and the US Coast Guard as specified above under part "MARINE

TRAFFIC CONTROL AND COMMUNICATION".

g. Utilities:

(1) A 30-inch diameter steel natural gas pipeline exists within the work area between stations 286+00 and 288+00; depth of pipeline ranges between 120 to 135 feet below Mean Lower Low Water (MLLW).

(2) The Contractor shall also make its own investigation and conduct utility research concerning other utility lines crossing the channel along the route from the harbor entrance to the turning basin and in areas to be dredged. Submit to the Contracting Officer a Utility Plan showing all utilities found as a result of investigation and utility research.

h. Bridges: The Contractor's plant and equipment will be required to pass under bridges, two of which are lift bridges, along the channel enroute to the project work site. Refer below to paragraph titled

"LIFT BRIDGE OPERATIONS".

1.8 WORK COMMENCEMENT AND COMPLETION REQUIREMENTS

a. To ensure immediate readiness to commence with dredging under this contract within 30 calendar days after the date the Contractor receives the Notice to Proceed (NTP), the Contractor shall commence on preliminary contract administrative work by promptly placing all orders, awarding subcontracts, and preparing, processing, and submitting a project schedule and all other required submittals and details.

b. Complete the entire work ready for use on or before 1 April 2022 (if contract is set up for one dredge season) or 1 April 2023 (if contract is set up for two dredge seasons). Refer above to subpart "General" under part "WORK COVERED BY CONTRACT DOCUMENTS" for information pertaining to number of dredge seasons. The time stated for completion shall include final cleanup of the premises and demobilization.

1.9 WORK SEQUENCING AND SCHEDULING

1.9.1 Work Sequence

There are certain essential criteria relative to the preparation of a work sequence and time schedule which the Contractor will be required to implement and follow during the prosecution of the 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. Proposed minor variations shall be noted on the progress charts submittal required by CONTRACT CLAUSE, entitled "SCHEDULES FOR CONSTRUCTION CONTRACTS." Variations shall be approved by the Contracting Officer prior to implementation.

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1.9.1.1 Base Bid Items (Optional Items 0004 and 0005 NOT AWARDED)

If Optional Items 0004 and 0005 ARE NOT AWARDED, the work sequence to complete the dredging and disposal work shall be as follows:

(1) Remove ordinary material (overburden) to expose top and sides of rock to -39 feet MLLW. Transport to and dispose of dredged ordinary material at the Isles of Shoals North (IOS-N) Disposal Site. Removal of ordinary material around and beyond the rock footprint shall be such that it allows for enough exposure of rock to survey from the top of rock elevation to at least -39 feet MLLW (refer to cross-sections C and D on sheet C-301).

(2) Upon completing the removal of overburden and enough ordinary material from around footprint of rock, and prior to the removal of rock, perform a pre-rock removal progress Contractor Quality Control Survey of the exposed top and sides of rock. Perform survey as specified in Section 01 71 23 FIELD ENGINEERING FOR DREDGING and submit results of survey to the Contracting Officer.

(a) Prior to any rock removal the Government will also perform an independent pre-rock removal survey. The Contractor shall not proceed with any rock removal until the Government's pre-rock removal survey has been completed and the notice to proceed with the rock removal has been given by the Contracting Officer.

(b) The Contractor shall provide the Government with at least 72 hours notice that exposed rock is ready to be surveyed.

(3) The sequence of work at this point shall be at the Contractor's discretion with acceptance by the Contracting Officer.

1.9.1.2 Base Bid Items (Optional Items 0004 and 0005 AWARDED)

a. If Optional Items 0004 and 0005 ARE AWARDED, the work sequence to complete the dredging and disposal work shall be as follows. All quantities for ordinary material noted below includes both the required depth and overdepth quantities.

(1) Remove ordinary material (overburden) from Region R1 to expose top and sides of rock to -39 feet MLLW. Transport dredged ordinary material removed from Region R1 and dispose of it at Nantasket Beach.

See Sequence Notes (1) and (2) below. Removal of ordinary material around and beyond the rock footprint shall be such that it allows for enough exposure of rock to survey from the top of rock elevation to at least -39 feet MLLW (refer to cross-sections C and D on sheet C-303).

(2) Upon completing the removal of overburden and enough ordinary material from around footprint of rock, and prior to the removal of rock, perform a pre-rock removal progress Contractor Quality Control Survey of the exposed top and sides of rock. Perform survey as specified in Section 01 71 23 FIELD ENGINEERING FOR DREDGING and submit results of survey to the Contracting Officer. See Sequence Note (3) below.

(3) After survey of rock is complete and accepted by the Contracting Officer, continue transporting and disposing of ordinary material at Nantasket Beach by using ordinary material removed from either Region R2 or Region R3, or from a combination of Regions R2 and R3 until the

SECTION 01 11 00 Page 12 total required volume of 300,000 cubic yards has been placed at Nantasket Beach. See Sequence Notes (1) and (2) below.

(4) After completing the placement of at least 300,000 cubic yards of ordinary material at Nantasket Beach, remove the remaining volume of ordinary material from Regions R2 and R3 (approximately 170,600 cubic yards of which includes both the required depth and overdepth quantities) and transport and dispose of it at the Salisbury and Newbury Nearshore Disposal Sites. Of the 170,600 cubic yards, dispose approximately 50 percent of it at the Salisbury Nearshore Disposal Site (Salisbury, Massachusetts) and approximately 50 percent of it at the Newbury Nearshore Disposal Sites (Newbury, Massachusetts). The disposal quantity at each nearshore disposal site shall be kept approximately equal throughout the project.

(5) Remove all of the ordinary material from Region R4 (approximately 21,900 cubic yards which includes both the required depth and overdepth quantities) and transport and dispose of it at the Salisbury and Newbury Nearshore Disposal Sites. Of the 21,900 cubic yards, dispose approximately 50 percent of it at the Salisbury Nearshore Disposal Site (Salisbury, Massachusetts) and approximately 50 percent of it at the Newbury Nearshore Disposal Sites (Newbury, Massachusetts). Material dredged from Region R4 MUST NOT be disposed of at Nantasket Beach.

(6) After all ordinary material has been removed from Regions R1 through R4 to the lines and depths as indicated in the Contract Documents and prior to removing the ordinary material from Region R5, perform a progress Contractor Quality Control Survey of Regions R1 through R4. Perform progress survey as specified in Section 01 71 23 FIELD ENGINEERING FOR DREDGING and submit results of survey to the Contracting Officer.

(7) After progress survey of Regions R1 through R4 is complete and accepted by the Contracting Officer, remove ordinary material from Region R5 (approximately 182,300 cubic yards) and ordinary material from the existing channel and existing turning basin (approximately 2,300 cubic yards), and transport material to and dispose of it at the Isles of Shoals North (IOS-N) Disposal Site. See Sequence Note (4).

(8) Request after dredge survey, perform clean-up, any remaining close-out requirements in accordance with the Contract Documents, and demobilization.

b. Sequence Notes:

(1) Ordinary material removed from Regions R1, R2, and R3 is considered acceptable for beach placement. The Contractor is not responsible for determining if material is suitable for beach placement. The Contractor is responsible for assessing the material before the scow/barge leaves the dredge site to make sure that the material is suitable for hydraulic pumping onto the beach through a hydraulic pipeline.

(2) If the Contractor determines that the material is found not suitable for being hydraulically pumped through an offloader the scow/barge shall be sent from the dredge site to either the Salisbury Nearshore Disposal Site or the Newbury Nearshore Disposal Site for disposal. Alternate disposals at each nearshore disposal site once

SECTION 01 11 00 Page 13 the disposal location for the first load has been selected.

(3) After pre-rock removal progress survey is complete, the sequencing order to prep and remove the hard (rock) material to the specified depths and transport it to and dispose of it at the Isles of Shoals North (IOS-N) Disposal Site is at the discretion of the Contractor.

The order of which the removal and disposal fits into the schedule must comply with and be completed within the environmental windows.

The schedule should take into account the sequencing for removal of the rock so that it is completed prior to the progress survey of Regions R1 through R4.

(4) Material dredged from Region R5 is considered glaciomarine clays and glacial till and shall not be disposed of at either Nantasket Beach or the Nearshore Disposal Sites.

1.9.2 Hours of Operations

a. The Contractor will be allowed under this contract to perform non-blasting work 24 hours per day, 7 days per week, including holidays.

b. The Contractor will be allowed to perform blasting work 7 days per week, including holidays. Blasting shall be confined to daylight hours during the period from 2 hours after sunrise to 1 hour before sunset but shall not be conducted before 9:00 A.M. or after 6:00 P.M.

on the day of blasting. Blasting shall not be conducted when temperature inversions or heavy, low-level cloud cover exists.

c. Dredging, blasting, and transportation and disposal work shall be performed within the allowable environmental windows as specified in Section 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS, part "SPECIAL

ENVIRONMENTAL REQUIREMENTS".

1.9.3 Scheduling

a. The Contractor shall fully and continually coordinate all work with the Pease Development Authority Harbormaster.

1.9.3.1 Initial Project Schedule

The initial project schedule shall be in the form of a chart graphically indicating the sequence proposed to accomplish each work feature or operation pursuant to FAR Clause 52.236-15 "Schedules for Construction Contracts". The chart shall be prepared to show the starting and completion dates of all work features on a linear horizontal time scale beginning with date of Notice to Proceed and indicating calendar days to completion. The Contractor shall indicate on the chart the important work features or operations that are critical to the timely overall completion of the project. Key dates for such important work features and portions of work features are milestone dates and shall be so indicated on the chart. This schedule will be the medium through which the timeliness of the Contractor's construction effort is appraised. Anticipated adverse weather delay days shall be included and clearly indicated in the schedule. Failure to develop the Project Schedule to an appropriate level of detail will result in its disapproval.

All work shall be carefully scheduled to prevent delays and any excessive interruptions with channel traffic.

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Periodic Schedule Updates

An updated schedule showing actual progress shall be submitted monthly and with each pay request. Changes to the base-line schedule shall be outlined in a narrative describing the reason for the change.

1.9.4 Rate of Progress

a. 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.

b. Prosecute the work diligently, and maintain a dredge production rate, based on working 24 hours a day, 7 days a week, of not less than 176,000 cubic yards for each 30 calendar day period of actual dredging work at the site.

c. Should the Contractor fail to maintain the required 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.

1.10 PRE-DREDGING PHOTOGRAPHIC SURVEY

The Contractor shall perform a pre-dredging photographic survey at the project site with the Contracting Officer. This pre-dredging photographic survey shall include still photographs and videos in sufficient quantity to fully document the existing condition of all, as applicable, bulkheads, piers, piles, fenders, and other shorefront structures and features within and adjacent to areas to be dredged as part of this contract. A written narrative shall be prepared by the Contractor which organizes and summarizes the findings of the pre-dredging survey photographs and videos. The narrative shall separately organize all items by individual owners. The condition of each item shall also be documented in writing.

The written narrative, together with the photographs and videos, shall constitute a "Pre-Dredging Photographic Survey Report", which shall be submitted to the Contracting Officer for approval. No on-site dredging work shall be performed until this "Pre-Dredging Photographic Survey Report" has been approved. Damage to features caused by the Contractor's operations shall be repaired by the Contractor at no additional expense to the Government.

1.11 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 or assign 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

SECTION 01 11 00 Page 15 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 all 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 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.

g. The project superintendent may neither serve as the Site Safety and Health Officer (SSHO) nor the Contractor Quality Control (CQC) System Manager.

1.12 WORK SITE AND CONTRACTOR'S USE OF PREMISES

1.12.1 General

All rules, regulations, and requirements covering such items as, but not limited to, general safety, security, sanitary requirements, environmental protection, pollution control, and traffic regulations…