Draft Specification.pdf

Solicitation No.:

W912WJ21X00XX

MAINTENANCE AND IMPROVEMENT

DREDGING

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

Construction Solicitation and Specifications

April 2021

PRELIMINARY SET

NOT FOR CONSTRUCTION

APRIL 20

IMPROVEMENT AND MAINTENANCE DREDGING PRESOLICITATION COPY

PORTSMOUTH HARBOR AND PISCATAQUA RIVER, NH/ME 04/26/21

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 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

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 Page 1

NOT FOR CONSTRUCTION

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 EXAMINATION OF SAMPLES

1.4 EXISTING REPORTS AND HISTORICAL DATA

1.5 SOIL AND ROCK CLASSIFICATION

1.6 INTERPRETATION

1.7 LABORATORY SOIL TESTS

PART 2 PRODUCTS

PART 3 EXECUTION

-- End of Section Table of Contents --

SECTION 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. Boring locations are shown on Contract Drawing sheet G-002.

The U.S. Army Corps of Engineers, New England District (USACE-NAE) and its contractors Ocean Survey, Inc. (OSI) and GZA GeoEnvironmental, Inc. (GZA) conducted geotechnical investigations of areas of Portsmouth Harbor shown in the contract drawings during 2006 and 2007 (see OSI's "Final Report, Marine Geophysical Investigation, Navigation Channel Improvement Project, Piscataqua River, Portsmouth, New Hampshire, OSI Report No. 06ES102-NH"), and 2016 (see GZA's "Report of Geotechnical Explorations, Portsmouth

Harbor Turning Basin and Piscataqua River Subsurface Investigation, Newington, NH and Eliot, ME, October 4, 2016", performed for USACE-NAE by

GZA). 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 (See Louis Berger's "Suitability

Assessment of Piscataqua River Sand Source for Nourishment of Nantasket

Beach"). USACE-NAE was not party to the Louis Berger work and had no input to the scoping, execution, review, or conclusions of the report.

The Ocean Survey, Inc. (OSI), GZA GeoEnvironmental, Inc. (GZA), and Louis

Berger reports can be found located on the USACE-NAE public website at the following address:

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

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

GeoEnvironmental report)

SECTION 00 32 00 Page 2

**REPORTS WILL NOT BE AVAILABLE DURING PRESOLICITATION**

- 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)

1.2 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

SECTION 00 32 00 Page 3

States of Stress and Temperatures

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

1.3 EXAMINATION OF SAMPLES

Ordinary and rock materials obtained from the subsurface explorations are available for examination.

Subsurface explorations were performed by the Corps of Engineers.

Pertinent subsurface information is located on the USACE-NAE public website:

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

Soil and rock samples 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 EXISTING REPORTS AND HISTORICAL DATA

Existing reports and historical data, relative to the dredging of

Portsmouth Harbor are available for viewing at the U.S. Army Corps of

Engineers New England District, 696 Virginia Road, Concord, MA. To review reports and data, contact Mr. Stephen Potts, Ph.D., P.G.(Telephone

978-318-8311) at least 7 days in advance to make arrangements.

1.5 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: Glaciomarine Clay;

Glaciofluvial/Glaciomarine Outwash; and Glacial Till.

SECTION 00 32 00 Page 4

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.

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.

1.6 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 the work.

1.7 LABORATORY SOIL TESTS

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

SECTION 00 32 00 Page 5

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 --

SECTION 00 32 00 Page 6

SECTION 00 41 00

BIDDING SCHEDULE

PART 1 GENERAL

Refer to Section 01 22 00 MEASUREMENT AND PAYMENT

1.1 LINE ITEMS

Item Estimated Unit Estimated

No. Description Quantity Unit Price Amount __

BASE BID ITEMS

0001 Mobilization and Demobilization for Dredging and Ocean Disposal

Work 1 JOB JOB $__________

0002 Dredging of 35-Foot Federal

Navigation Channel and Turning

Basin, and the Turning Basin

Expansion Area with Disposal of Ordinary Material at the

Isles of Shoals North (IOS-N)

Disposal Site

0002AA First 541,700 CD 541,700 CD $_______ $__________

0002AB Over 541,700 CD 135,400 CD $_______ $__________

0003 Removal of Hard (Rock) Material within the 35-Foot Turning

Basin Expansion Area with

Disposal of Rock at Isles of

Shoals North (IOS-N) Disposal

Site

0003AA First 8,000 CD 8,000 CD $_______ $__________

SECTION 00 41 00 Page 1

0003AB Over 8,000 CD 6,700 CD $_______ $__________

TOTAL ESTIMATED AMOUNT FOR BASE BID ITEMS $_____________

OPTIONAL BID ITEMS

0004 Mobilization and Demobilization for Disposal at Nantasket Beach and Nearshore Disposal Sites

(See Note 5, 7 and 8) 1 JOB JOB $__________

0005 Disposal of Dredged Ordinary

Material at Nantasket Beach and Nearshore Disposal Sites

(See Note 6, 7 and 8) 492,500 CD $_______ $__________

0006 Geotechnical Field

Technician 1 JOB JOB $__________

TOTAL ESTIMATED AMOUNT FOR OPTIONAL BID ITEMS $_____________

TOTAL ESTIMATED AMOUNT $_____________

1.2 BID NOTES

Note 1: "CD" = Cubic Yards.

Note 2: Bidders must bid all items. The work will be awarded as a whole to one bidder. Offers will be evaluated and the low bidder determined by the TOTAL ESTIMATED AMOUNT for Line Items 0001 through 0006, including the

Base Bid Items and the Optional Bid Items. The minimum work awarded will be the Base Bid work.

Note 3: All work shall be completed within the time period specified in the SPECIAL CONTRACT REQUIREMENTS, Subpart "COMMENCEMENT, PROSECUTION AND

SECTION 00 41 00 Page 2

COMPLETION OF WORK (APR 1984) FAR 52.211-10."

Note 4: Item Numbers 0002 and 0003 are subdivided into two estimated quantities and shall be separately priced. The Government will evaluate these items on the basis of the total price of their sub-items. (AFARS

5152.211-9001 Variations in Estimated Quantities -- Subline Items).

Note 5: Estimated amount for Item Number 0004 shall only be the cost for mobilization and demobilization that is above and beyond the cost that is required for the mobilization and demobilization for the dredging work and ocean disposal at the Isles of Shoals North (IOS-N) Disposal Site.

Note 6: Estimated amount for Item Number 0005 shall be the cost to transport and complete the beach fill placement work and disposal work at the nearshore disposal sites as specified in Section 01 22 00 MEASUREMENT AND PAYMENT less the cost to transport and dispose of the dredged material at the Isles of Shoals North (IOS-N) Disposal Site.

Note 7: Item Numbers 0004 and 0005 must be awarded together.

Note 8: If Item Number 0005 IS NOT awarded, progress payments for dredging and disposal will be based on the awarded contract price per cubic yard under Item Number 0002. If Item Number 0005 IS awarded, progress payments for dredging and disposal will be based on the summed total of the awarded contract price per cubic yard for Item Number 0002 and the awarded contract price per cubic yard for Item Number 0005. The

Contractor's estimated amount for Item No. 0005 shall be determined as specified under Note 6.

Note 9: Line Item Numbers 0004, 0005, and 0006 are Optional Bid Items that may, at the option of the Government, be exercised at any time up to receipt by the Contractor of the Notice to Proceed (NTP). If the Optional

Bid Items are awarded, no additional calendar days will be added to the project duration.

Note 10: Estimated quantities shown for Item Numbers 0002 and 0003 include the allowable overdepth as specified under paragraph titled

"DREDGING LIMITS" in Section 35 20 23 MECHANICAL DREDGING.

Note 11: All Offerors MUST be registered and active in SAM.GOV at the time of bid submission. Offerors not registered and active in SAM at time of submission will be rejected.

SECTION 00 41 00 Page 3

Note 12: All Offerors MUST submit an Electronic bid submissions and must include a scanned copy of the original bid guarantee. The original bid guarantee with “wet” signature and raised seal (if applicable) must be mailed or delivered to the address instructed on the “Virtual Bid Opening

Solicitation Instructions” and received by the bid opening time and date.

Note 13: Identify a point of contact e-mail for all correspondence related to this bid: ______________________@______________.

- End of Bidding Schedule -

SECTION 00 41 00 Page 4

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 PROJECT LOCATION

1.2 WORK COVERED BY CONTRACT DOCUMENTS

1.2.1 General

1.2.2 Work Restrictions

1.2.3 General Description of Work

1.2.3.1 Base Bid Items

1.2.3.2 OPTIONAL BID ITEMS 0004 AND 0005

1.3 REFERENCES

1.4 SUBMITTALS

1.5 PROJECT SITE CONDITIONS

1.5.1 Physical Data

1.6 WORK COMMENCEMENT AND COMPLETION REQUIREMENTS

1.7 WORK SEQUENCING AND SCHEDULING

1.7.1 Work Sequence

1.7.2 Hours of Operations

1.7.3 Scheduling

1.7.4 Rate of Progress

1.8 SUPERINTENDENCE BY THE CONTRACTOR

1.9 WORK SITE AND CONTRACTOR'S USE OF PREMISES

1.9.1 General

1.9.2 Staging and Storage Areas

1.9.3 Work Limits

1.9.4 Access to Work Site

1.9.5 Protection and Security

1.9.6 Work By Other Contractors

1.9.7 Emergency Contacts

1.9.8 Damaged Property

1.9.9 Contractor's Receipt of Supplies

1.9.10 Daily Clean Up

1.9.11 Government Sanitary Facilities

1.10 CONTRACTOR'S USE OF UPLAND FACILITIES AND HAULING ROUTES

1.11 QUALITY ASSURANCE

1.12 LIFT BRIDGE OPERATIONS

1.12.1 General

1.12.2 Memorial Bridge

1.12.3 Sarah Mildred Long Bridge

1.13 COORDINATION

1.13.1 Public Notice

1.13.2 Notice to Mariners

1.13.3 Aids to Navigation

1.13.4 Marine Traffic Control and Communication

1.13.5 Points of Contact

1.14 GENERAL SAFETY REQUIREMENTS

1.14.1 General

1.14.2 Contractor's Project Superintendent

1.15 ENVIRONMENTAL PROTECTION

1.16 COORDINATION AND DIRECTION DURING CONSTRUCTION

1.17 PRECONSTRUCTION CONFERENCE

SECTION 01 11 00 Page 1

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.

The dredging work under this contract is located at the upper end of the

Federal Navigation Project (FNP) as shown on Contract Drawing sheet

G-002. Location and description for each disposal site can be found in

Section 35 20 23 MECHANICAL DREDGING.

1.2 WORK COVERED BY CONTRACT DOCUMENTS

1.2.1 General

a. The work as required under this contract involves the dredging of the Portsmouth Harbor Federal Navigation Project (FNP) and the disposal of dredged ordinary material and hard (rock) material at at unconfined open ocean disposal site and the disposal of dredged ordinary material at two nearshore disposal sites and as beach fill at one beach.

b. 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 Specifications.

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

SECTION 01 11 00 Page 3

1.2.2 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.

1.2.3 General Description of Work

1.2.3.1 Base Bi d I t ems

a. Mobilization and Demobilization ( Base Bi d I t em 0001)

Perform mobilization and demobilization as necessary to complete all contract work in accordance with the contract documents and specified requirements. Refer to Notes in Bidding Schedule and Section 01 22 00 MEASUREMENT AND PAYMENT for a description of what is included as part of the Base Bid Items.

b. Dredging and Ocean Disposal Work ( Base Bi d I t em 0002)

(1) Perform dredging work in the existing 35-foot federal navigation channel (from approximately Station 285+00 to Station 309+67) and the 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 in Section 35 20 23 MECHANICAL DREDGING under subparagraph "Unconfined Ocean Disposal Site".

(2) Perform dredging 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 blasting of the hard (rock) material will 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

SECTION 01 11 00 Page 4

Contractor shall coordinate all pre-blasting and blasting work with the Contracting Officer and the Pease Development Authority Harbormaster.

Prior to rock removal, remove overburden (Region R1) to expose top of rock and perform a pre-rock removal Contractor Quality Control Survey. 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. Perform survey as specified in Section 01 71 23 FIELD ENGINEERING FOR DREDGING and submit results of survey to the Contracting Officer.

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 in Section 35 20 23 MECHANICAL DREDGING under subparagraph "Unconfined Ocean Disposal Site".

(3) Perform dredging to remove approximately 674,800 cubic yards of ordinary material within the 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 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 in Section 35 20 23 MECHANICAL DREDGING under subparagraph "Unconfined Ocean Disposal Site". 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.

Approximate volume to be removed from each region (see Detail D8 on Contract Drawing sheet C-101):

Region R1 - 86,300 cubic yards Region R2 - 364,400 cubic yards Region R3 - 19,900 cubic yards Region R4 - 21,900 cubic yards Region R5 - 182,300 cubic yards

(4) If Optional Bid Items 0004 and 0005 NOT AWARDED, the general description of the work stops here and the total volume of dredged ordinary material removed from Regions R1 through R5 shall be loaded into scows, and transported to and disposed of at Isles of Shoals North (IOS-N). Refer above for disposal target sites and location for IOS-N.

(5) If Optional Bid Items 0004 and 0005 are AWARDED, the general

SECTION 01 11 00 Page 5 description of the work continued below under subparagraph titled "Optional Bid Items 0004 and 0005" becomes part of this contract.

With the award of Optional Bid Items 0004 and 0005, the volume of dredged ordinary material removed from Regions R1 through R4 will be broken up and disposed of at Nantasket Beach and the Salisbury Nearshore Disposal Site and the Newbury Nearshore Disposal Site.

Material removed from Region R5 will be disposed of at the IOS-N.

1.2.3.2 OPTI ONAL BI D I TEMS 0004 AND 0005

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

Perform mobilization and demobilization as necessary to complete disposal work at Nantasket Beach and the Salisbury and Newbury Nearshore Disposal Sites in accordance with the contract documents and specified requirements. Refer to Notes in Bidding Schedule and Section 01 22 00 MEASUREMENT AND PAYMENT for a description of what is included and NOT included as part of the Optional Bid Items.

b. Dredging and Disposal Work ( Opt i onal Bi d I t em 0005)

(1) Remove 300,000 cubic yards of ordinary material from Regions R1 through R3, load into scows/barges, and transport to and dispose of the 300,000 cubic yards of ordinary material at Nantasket Beach in Hull, Massachusetts. The sequence and order of work for the removal of ordinary material from Regions R1 through R3 shall be as specified below under subparagraph titled "Work Sequence".

Material in Regions R4 and R5 MUST NOT be transported to or disposed of at Nantasket Beach.

Place, spread, and grade 300,000 cubic yards of dredged ordinary material along Nantasket Beach within the designated limits and location along the beach to the lines and grades as indicated on Contract Drawings C-102, C-103, and C-302, and as specified in Section 35 20 26 BEACH FILL PLACEMENT. Perform field engineering and survey work as specified in Section 01 71 24 FIELD ENGINEERING

FOR BEACH FILL PLACEMENT.

At least 300,000 cubic yards of material must be placed at Nantasket Beach. To meet the required total volume, the ordinary material will be a combination material dredged from Regions R1 through R3. The Contractor shall be responsible for verifying that the all dredged ordinary material being removed from Regions R1 through R3 to be used as beach fill is material that is suitable to hydraulically pump from scows/barges via hydraulic pipeline onto the beach. If a loaded scow/barge shows up at Nantasket Beach and is determined by the Contractor that the dredged ordinary material is not suitable for pumping, the scow/barge shall reroute the scow/barge to transport and dispose of the dredged ordinary material at either the Newbury Nearshore Disposal Site or the Salisbury Nearshore Disposal Site.

(2) After the required total volume of 300,000 cubic yards has been placed at Nantasket Beach, the volume of dredged ordinary material remaining in Regions R1 through R3 (approximately 170,600 cubic yards) and all of of the dredged ordinary material from Region R4 (approximately 21,900 cubic yards) shall be loaded into scows/barges, and transported to and disposed of at the designated nearshore disposal sites. Of the total remaining volume from

SECTION 01 11 00 Page 6

Regions R1 through R3 and the total volume from R4, approximately 96,300 cubic yards shall be disposed of at the Salisbury Nearshore Disposal Site (Salisbury, Massachusetts) and approximately 96,200 cubic yards shall be disposed of at the Newbury Nearshore Disposal Sites (Newbury, Massachusetts); see sketch titled "Nearshore Disposal Site Locations" attached at the end of this specification section. Target site coordinates and disposal requirements for each nearshore disposal site can be found in Section 35 20 23 MECHANICAL DREDGING under subparagraph titled "Nearshore Disposal Sites".

Upon completing the removal of all ordinary material from Regions R1 through R4 and the removal of hard (rock) material to required depths, and prior to starting the removal of ordinary material from Region R5, perform a progress afterdredge Contractor Quality Control Survey. Perform survey as specified in Section 01 71 23 FIELD ENGINEERING FOR DREDGING and submit results of survey to the Contracting Officer.

(3) Remove approximately 182,300 cubic yards of dredged ordinary material from Region R5, load into scows/barges, and transport it to and disposed 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 "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 be found in Section 35 20 23 MECHANICAL DREDGING under subparagraph "Unconfined Ocean Disposal Site". Dredged material removed from Region R5 is considered glaciomarine clays and glacial till and must not be disposed of at Nantasket Beach or at the Nearshore Disposal Sites.

(4) Remove and dispose of hard (rock) material as specified above under subpart (3) of subparagraph titled "Dredging and Ocean Disposal Work (Base Bid Item 0002)"

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

Refer to Section 35 20 23 MECHANICAL DREDGING for details.

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

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

33 CFR 117.11 Unnecessary Opening of The Draw

33 CFR 117.531 Piscataqua River

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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

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.

Two Week Schedule of Work Activities ; G, RO

1.5 PROJECT SITE CONDITIONS

1.5.1 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

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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 afford a practicable passage.

(3) Daily channel traffic and vessel movements shall be coordinated with the Pease Development Authority, Division of Ports and Harbors as specified below under subparagraph titled "Marine Traffic Control and Communication".

h. Utilities: 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). The Contractor shall also make its own investigations concerning other utility lines crossing in areas to be dredged.

i. 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".

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1.6 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. The time stated for completion shall include final cleanup of the premises and demobilization.

1.7 WORK SEQUENCING AND SCHEDULING

1.7.1 Work Sequence

a. 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.

b. The Contractor shall complete the dredging and disposal work using the following work sequence:

1. Remove ordinary material (overburden) from Region R1 to expose top and sides of rock. Transport to and dispose of dredged ordinary material removed from Region R1 at Nantasket Beach. See Sequence Note

(1) below.

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. Submit results of survey to the Contracting Officer. See Sequence Note (2) below.

3. After survey of rock is complete and accepted by the Contracting Officer, continue disposing of ordinary material at Nantasket Beach by removing ordinary material from either Region R2 or Region R3, or from a combination of Regions R2 and R3 until the total required volume of 300,000 cubic yards has been disposed of at Nantasket Beach. See Sequence Note (2) below.

4. After completing the placement of at least 300,000 cubic yards of ordinary material at Nantasket Beach, remove all remaining ordinary material from Regions R2 and R3 and the total required volume from Region R4, and transport it to and dispose of it at either the Salisbury Newbury Nearshore Disposal Site or the Newbury Nearshore Disposal Site.

5. After all ordinary material has been removed from Regions R1 through R4 to the lines and depths as indicated on the Contract

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Drawings and prior to removing the ordinary material from Region R5, perform a progress afterdredge Contractor Quality Control Survey of Regions R1 through R4. Submit results of survey to the Contracting Officer.

6. After progress survey of Regions R1 through R4 is complete and accepted by the Contracting Officer, remove ordinary material from Region R5 and shoaled material from the federal navigation channel and turning basin, and transport material to and dispose of it at the Isles of Shoals North (IOS-N) Disposal Site.

7. Perform clean-up, provide remaining progress and afterdredge Contractor Quality Control Surveys, and any remaining close-out requirements in accordance with the Contract Documents.

c. Sequence Notes

(1) Scows/barges loaded with material that is found not to be pumpable via hydraulic pipeline shall be rerouted for disposal of material at either the Salisbury Nearshore Disposal Site or the Newbury Nearshore Disposal Site.

(2) After progress pre-rock removal 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 afterdredge survey of Regions R1 through R4.

1.7.2 Hours of Operations

The Contractor will be allowed to perform non-blasting work 24 hours per day, 7 days per week, including holidays, for the entire period of performance of this contract. 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 MECHANICAL DREDGING, and 35 30 00 UNDERWATER DRILLING AND CONFINED BLASTING for restrictions to blasting, dredging, and disposal activities.

1.7.3 Scheduling

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

b. 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 two week 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

SECTION 01 11 00 Page 11 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.

1.7.4 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 200,000 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.

1.8 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 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.

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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.

1.9 WORK SITE AND CONTRACTOR'S USE OF PREMISES

1.9.1 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 shall be observed by the Contractor.

1.9.2 Staging and Storage Areas

Refer to Section 01 50 00 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS for dredging and disposal work at IOS-N and the nearshore disposal sites.

Refer to Section 01 50 01 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS for disposal and placement work at Nantasket Beach.

1.9.3 Work Limits

The limits of work are the Federal Channel and Turning Basin and the limits of the turning basin expansion. Specific dredging areas and side slope areas within these limits shall be dredged to obtain the required depths and side slopes as shown on the Contract Drawings and as specified in Section 35 20 23 MECHANICAL DREDGING.

1.9.4 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.

1.9.5 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.

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

d. The Contractor shall report any vandalism, suspicious activities, or devices to the Contracting Officer and local police as soon as possible.

1.9.6 Work By Other Contractors

Work by other contractors is not anticipated to occur during the performance period of this contract. However, the Contractor must be aware that the Portsmouth Harbor will maintain full operations during construction and usage of channel and turning basin must be coordinated with the harbor master at all times. Refer above to subparagraph "Channel

Traffic".

1.9.7 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.

1.9.8 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.

1.9.9 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.

1.9.10 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.

1.9.11 Government Sanitary Facilities

Toilet facilities are not available on site for Contractor's use. The

Contractor shall provide portable toilets for its personnel and

SECTION 01 11 00 Page 14 subcontractors as specified in EM 385-1-1 under Section 2, Sanitation.

1.10 CONTRACTOR'S USE OF UPLAND FACILITIES AND HAULING ROUTES

a. Unless obtained by the Government or specified otherwise in the contract documents, the Contractor shall be responsible for the following:

(1) Locating, coordinating, and obtaining permission to use any land-based water access (docks, piers, ramps, etc.) that the Contractor deems necessary to complete the work.

(2) Determining, if necessary, the trucking and hauling routes and associated restrictions to and from the work, to include the coordination for the use of such routes with local, state, and federal authorities.

(3) Complying with all local, state, and federal regulations and restrictions when using any upland facilities or hauling routes.

b. The Government and its representatives will be allowed the use of the same land-based water access obtained by the Contractor.

1.11 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.

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…