W912BU22B0008-Specs-AM0001.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

***************************THE BID OPENING DATE IS NOT EXTENDED*****************************

(See Continuation page) Please indicate receipt of this amendment on Standard Form 1442 (SOLI CI TATION, OFFER, AND AWAR D) as Amendment No. 0001. Failure to acknowledge all amendments may be cause for rejection of the bid.

Only a warranted Contracting Officer (either a Procuring Contracting Officer (PCO) or an Administrative Contracting Officer (ACO)), acting within their appointed limits, has the authority to issue modifications or otherwise change the terms and conditions of this contract. If an individual other than the Contracting Officer attempts to make changes to the terms and conditions of this contract, you shall not proceed with the change and shall immediately notify the Contracting Officer. Proceeding with any work not authorized by the Contracting Officer will be at the Contractor's own risk.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912BU22B0008

X 9B. DATED (SEE ITEM 11)

12-Aug-2022

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO.

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

01- SEP-2022

CODE

US ARMY ENGINEER DISTRICT, PHILADELPHIA

POC: ZAQUETTE EVERETT USACE, PHI

WANAMAKER BUILDING 100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W912BU 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912BU22B0008

SECTION SF 30 BLOCK 14 CONTINUATION PAGE SUMMARY OF CHANGES

RFI questions:

1. Can the government provide the contract drawing's bathymetric survey data of the dredging areas used to calculate the advertised quantities, in XYZ format?

Answer: Specific xyz data will be provided with before and after dredging surveys during execution of the contract to awardee of contract. Quantities shown on the bid schedule included existing and/or anticipated shoaling that will occur until start of dredging.

2. Additionally, please provide the current condition of the government-furnished upland disposal areas:

Pedricktown South, Killcohook, and Reedy Point North and South, in Autocad or XYZ format.

Answer: Please see appropriate notes on Sheets C-401, 403, 404, & 405 of Amendment 1 regarding existing conditions and site visits; FAR Clause 52.237-1, and Specification Section 35 20 23, Paragraph 1.7.

(End of Summary of Changes)

Amendment No. 0001

IFB W912BU22B0008

14. DESCRIPTION OF AMENDMENT (continued)

a. BIDDING SCHEDULE: Please delete the Bidding Schedule in its entirety, and substitute the revised Bidding Schedule, annotated Amendment No. 0001, attached hereto.

b. TECHNICAL SPECIFICATIONS:

(1) Section 35 20 23 – DREDGING: Please delete this section in its entirety, and substitute the revised section 35 20 23, annotated Amendment No. 0001, attached hereto.

c. CONTRACT DRAWINGS:

(1) Please delete the following drawings in their entirety and substitute the revised drawings of the same numbers, with the latest revision date of 26 August 2022, attached hereto:

G-001 C-401 C-001 C-403 C-101 C-404 C-102

(2) Please delete Sheet C-402 in its entirety.

(3) Please add new drawing sheet C-405 with an issue date of 26 August 2022.

d. Please indicate receipt of this amendment on Standard Form 1442 (SOLICITATION, OFFER, AND AWARD) as Amendment No. 0001. Failure to acknowledge all amendments may be cause for rejection of the bid.

This page was intentionally left blank for duplex printing.

Amendment 0001

00 10 00-3

BIDDING SCHEDULE

(To be attached to SF 1442)

Item Estimated Unit Estimated No. Description Quantity Unit Price Amount______

1. Mobilization and Demobilization 1 JOB L.S. $___________

2. Removal and Satisfactory Disposal of Material from Wilmington Harbor, Christina River 650,000 CY $________ $___________

3. Mobilization and Demobilization Between Wilmington Harbor, Marcus Hook, Deepwater Point, and New Castle Ranges (Dredge Movement and Pipeline Relocation) 3 EA $________ $___________

4. Removal and Satisfactory Disposal of Material from Marcus Hook and New Castle Ranges 1,800,000 CY $________ $___________

5. Removal and Satisfactory Disposal of Material from Deepwater Point 750,000 CY $________ $___________

TOTAL ESTIMATED BID AMOUNT $_________________

NOTE: Bidders must bid on all items.

SECTION 35 20 23

DREDGING

PART 1 GENERAL

1.1 WORK COVERED BY CONTRACT PRICE

The contract price per cubic yard for dredging shall include the cost of removal and disposal of all materials as specified herein or indicated on the drawings, with the exception of ledge rock, large boulders, rock fragments, wrecks, snags, stumps, and piles which cannot be removed or buried below project depth without blasting. Should ledge rock or other material which cannot be removed without blasting be encountered, the Contractor shall remove therefrom all overlying material which in the judgment of the Contracting Officer can be removed. Nothing in this paragraph shall be construed as prohibiting the removal of excepted material by special means at prices agreed upon and approved in accordance with FAR 52.236-2 "DIFFERING SITE CONDITIONS".

1.2 REFERENCES

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

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO M 43 (2005; R 2018) Standard Specification for Sizes of Aggregate for Road and Bridge Construction

AMERICAN WOOD PROTECTION ASSOCIATION (AWPA)

AWPA U1 (2021) Use Category System: User Specification for Treated Wood

AWPA M4 (2021) Standard for the Care of Preservative-Treated Wood Products

AWPA P5 (2015) Standard for Waterborne Preservatives

ASTM INTERNATIONAL (ASTM)

ASTM E100 (2017) Standard Specification for ASTM Hydrometers

PENNSYLVANIA DEPARTMENT OF TRANSPORTATION (PennDOT)

Publication 408 (2016, Rev Apr 2019) Publication 408 Specifications

SOUTHERN PINE INSPECTION BUREAU (SPIB))

SPIB 1003 (2014) Standard Grading Rules for Southern Pine Lumber

Section 35 20 23 Page 1

U.S. ARMY CORPS OF ENGINEERS (USACE)

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

EM 1110-2-1003 (2013) Hydrographic Surveying

U.S. DEPARTMENT OF COMMERCE (DOC)

DOC/NIST PS20 American Softwood Lumber Standard

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

33 CFR 156 (2013) Oil and Hazardous Material Transfer Operations

1.3 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 DESCRIPTIONS:

NOTE: Any submittals classified as "SD-01 Preconstruction Submittals" are submittals required to be submitted to, and approved by, the office indicated prior to mobilization to the contract work site. All other submittals, classified as "SD-02" through "SD-11", shall be submitted to, and approved or reviewed by, the office indicated prior to commencing the particular task to which the submittal is associated.

SD-01 Preconstruction Submittals

Disposal Area Plan; G,COR

Submit a plan for usage or modification of the disposal areas.

This plan shall show the areas or portions thereof to be used, the locations and cross-sections of proposed dikes, the locations of sluices and drainage structures, and the manner in which the dredged material will be distributed in the areas. Plans for any Contractor-furnished rehandling basins and enclosures, including character of materials to be used, means of placement, cross-sections of proposed dikes and other structures and required state and local permits, shall also be submitted for approval by the Contracting Officer.

Fall Protection Inspection Report; G,COR

Sluice Walkway Plan; G,COR

Submit a site specific plan of any proposed walkway to be installed or changed.

Outfall Extension Work Plan; G,COR

Submit a plan for the sluice outfall pipes extension at the Government-furnished Pedricktown South disposal area. Include in the plan a description of the proposed method for securing the

Section 35 20 23 Page 2 pipes as required by these specifications. Include sketches showing plan and elevation views and details for the proposed method and data on the materials to be used.

Discharge Pipe Support; G,COR

Submit a description of the proposed method for supporting the discharge pipe inside the disposal area as required by these specifications, to include sketches showing plan and elevation views and details for the proposed method, and data on the materials to be used.

Vessel and Equipment List; G,COR

Submit a complete list of all vessels and equipment to be used during the contract, including all dredging plants, supporting vessels, and equipment. Include on the list the types, the numbers of each, the draft of each, and all other pertinent information. The capacity of all scows shall be included in the equipment list. List the survey vessel, survey crew, type of survey equipment, and software that may be used.

SD-02 Shop Drawings

Sluice Walkway; G,DO

Submit a plan of the proposed walkway.

Submerged Pipeline

Soundings or Sweepings; G

Indicate pipeline location and installation details. Submit drawings of surveys during progress of work by soundings or sweepings.

SD-05 Design Data

Design Data; G,DO

SD-06 Test Reports

Daily Report of Operations; G,COR

Prepare, maintain, and submit daily, the Daily Report of Operations forms, and furnish signed copies thereof with the Quality Control Reports required in Section 01 45 00 QUALITY CONTROL. A sample Daily Report of Operations form is attached at the end of this Section. Further instructions on the preparation and submittal of this form will be provided at the Pre-Dredging Coordination Meeting. Submittals for the Daily Report of Operations are available to the public.

Daily Log of Surveys Performed; G,COR

When the Contractor conducts surveys of the contract work, a daily log of surveys performed shall be submitted. A sample is included at the end of this section. The log shall include the area surveyed, the tide gauge used, and the calibrations performed

Section 35 20 23 Page 3

(e.g. barchecks, SV probes).

Daily Dredgehead Positioning Records; G,COR Fuel Usage

Disposal Area Effluent Measurements; G,COR

Submit daily, the records of disposal area effluent measurements and corrective action taken.

SD-07 Certificates

Timber for Flashboards and Sluice Box Walkways; G,COR

Submit certificates of compliance attesting that the timber flashboards and sluice box walkway timber conform to the requirements of this specification.

Aggregate Material; G,COR

1.4 ORDER OF WORK AND DREDGING TIME RESTRICTIONS

Unless otherwise directed by the Contracting Officer, the dredging work shall commence in Wilmington Harbor, Christina River at the Delaware River end of the work area - Acceptance Section #4 and proceed upstream to Acceptance Section #1. The order of work for the New Castle, Deepwater Point, and Marcus Hook Ranges of the Delaware River will be determined by the Contracting Officer when the notice to proceed is issued. Dredging under this contract shall be subject to the requirements specified in Section 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS and the following seasonal time restrictions:

a. Dredging in Wilmington Harbor, Christina River will only be permitted from 1 July through 1 March to minimize impacts to migratory fish.

b. Dredging in the Delaware River will only be permitted from 1 July through 15 March in the Marcus Hook range.

1.5 SCHEDULING OF WORK ASSIGNMENTS

1.5.1 General

Complete each work assignment within the number of calendar days, computed in accordance with the method specified below, after the date of receipt of each successive notice to proceed provided that no work assignment will result in work being performed after the contract completion date stated in Contract Clauses. For the purpose of these specifications, work assignment is defined as the reach of a specific range(s) which is to be dredged to the dimensions specified herein or shown on the drawings to the depth required by the Contracting Officer. Work may be assigned in any, but not necessarily all, of the areas identified in the paragraph herein titled:

"ESTIMATED QUANTITIES", or may be assigned in additional areas as specified in Paragraph "PHYSICAL DATA" of Section 01 30 00 ADMINISTRATIVE REQUIREMENTS.

1.5.2 Plant and Equipment

Keep sufficient dredge plant and equipment capable of performing at the specified production rates for any required dredging on the job site, and

Section 35 20 23 Page 4 employ this equipment by continuously dredging from the start of the first work assignment until the completion of the last work assignment except for allowable down time for movement of pipe, etc. Any site work required at the Government-furnished disposal areas shall be completed in sufficient time so as not to delay any of the work assignments. Movement of equipment between successively used disposal areas will not be subject to assessment of liquidated damages except as specified under paragraph titled:

"MEASUREMENT AND PAYMENT".

1.5.3 Government Plant

The Government reserves the right to utilize another plant in any of the work assignment areas during the contract period.

1.5.4 Government-Furnished Information

The Government will provide to the Contractor, the second and subsequent work assignments not later than ten calendar days before the completion date of the current work assignment. If all data contained in the attached sample work assignment letter is not available at that time, an initial notice of work assignment will be issued. This notice will contain at a minimum, the work assignment commencement date, range, approximate stationing, order of work, 24-hour production rate and disposal area to be used. In such instances the before-dredging soundings, required depth, and acceptance sections will be furnished prior to the scheduled commencement date, with the remaining information to be furnished as soon as possible thereafter. The completion times and dates provided for work assignments will be estimated since subsequent before-dredging surveys will be obtained for each acceptance section as specified in paragraph titled: "MEASUREMENT AND PAYMENT". The scheduled work assignment completion date will be determined by the sum total of pay quantity available within all acceptance sections. If the Contractor projects completion of a work assignment prior to the completion date established by the Government, he shall advise the Contracting Officer as soon as possible so as to expedite issuance of the next work assignment. The actual completion date of each work assignment will be used to determine the commencement date for the next work assignment in order to maintain continuous dredging throughout the contract.

1.5.5 Computation of Completion Times

The number of cubic yards, in situ, and the production rates listed below will be used to establish the completion times for the contract areas included under this contract. The production rates are based on a working schedule of seven days per week with one eight hour lay shift per week.

Range/Anchorage 24-Hour Production Rate (C.Y.)

Marcus Hook 25,000

Deepwater Point 20,000

New Castle 20,000

The completion time in days will be computed by dividing the estimated dredging quantity by the above production rates, rounded to the next

Section 35 20 23 Page 5 highest whole number.

1.6 CHARACTER OF MATERIALS

a. The material to be removed to restore the depth within the limits called for in the specifications and drawings, is that composing the shoaling that has occurred since the channel was last dredged as noted in Section 01 30 00 ADMINISTRATIVE REQUIREMENTS. The character of the material is believed to be as indicated by the results of Government-conducted sampling. "Abstract of Bottom Samples" can be found in Appendix B40 of this specification.

b. It is the Government’s position that sufficient information has been provided in this contract package to enable the Contractor to establish the type and quantity of material to be removed. USACE Survey and Mapping hydrographic survey information is available online through the eHydro link at http://navigation.usace.army.mil/Survey/Hydro. Data on this or other websites are not appropriate for volume computations. Full datasets are available upon request. However, prior to bidding, the Contractor may, at his discretion and expense, conduct additional investigation to further determine conditions at the site.

1.7 SITE CONDITIONS

Bidders are expected to examine the site of the work, including the disposal areas and decide for themselves as to the conditions affecting their operations. See Contract Clause titled: "SITE INVESTIGATION AND CONDITIONS AFFECTING THE WORK". The entire work site is designated as a hard hat area in accordance with EM 385-1-1.

1.8 DAILY DREDGEHEAD POSITIONING RECORDS

For all dredging and for each dredge employed under this Contract, a computerized positioning system capable of representing the horizontal and vertical position of the hopper draghead, and/or hydraulic cutterhead, and/or clamshell bucket at any given time throughout the dredging cycle shall be utilized. Horizontal and vertical positioning of the draghead and/or cutterhead and/or bucket shall be recorded at intervals not greater than one minute in duration. The horizontal and vertical (x,y,z) positions of the dredge draghead, cutterhead, and/or bucket shall be provided to the COR in an approved electronic format. Commercially available systems such as those offered by companies under the registered trademarks of Dredgepak, Winops, or similar proprietary systems developed by the Contractor would be considered satisfactory. The system shall produce a record of the working locations, horizontal and vertical, of the draghead and/or cutterhead and/or bucket, in a continual display and in a submittal satisfactory to the COR. Submittals of this information shall be transmitted electronically to the COR daily at the same time as the Daily Operations Report.

1.9 HYDROGRAPHIC SURVEYS

Conduct hydrographic surveys to meet USACE Performance Standards for Navigation and Dredging Support, as defined in the Hydrographic Surveying Manual EM 1110-2-1003. Surveys shall be performed by single transducer sounding techniques, multi-beam sweep type surveys or both. Bottom soundings shall be obtained by the single beam fathometer operating at a frequency ranging from 190 to 210 kHz. When utilizing multi-beam technology, the operating frequency will range from 180 to 250 kHz. All

Section 35 20 23 Page 6 fathometers shall be calibrated following procedures outlined in the referenced EM.

1.10 FUEL OIL HANDLING

Ensure that all fuel oil transfer operations to or from the plant comply with all Federal, state, and municipal laws, codes and regulations.

Incorporate in the Accident Prevention Program, submitted in compliance with the Contract Clause: "ACCIDENT PREVENTION", sufficient information to demonstrate compliance with 33 CFR 156 and any other applicable laws, codes, and regulations. Submit on or before the last day of each month, a Fuel Usage report listing the totals of fuels consumed by the dredging plant and supporting vessels. Separately list the quantities of each type of fuel used. Each report shall cover the period from the 25th of the preceding month to the 25th of the current month.

PART 2 PRODUCTS

2.1 TIMBER FOR FLASHBOARDS AND SLUICE BOX WALKWAYS

Timber for flashboards and sluice box walkways shall be Southern Yellow Pine, Grade No. 1, and shall conform to the SPIB 1003 and the applicable requirements of U. S. Department of Commerce DOC/NIST PS20. The timber shall be surfaced on four sides and the dress size shall conform to U. S.

Department of Commerce DOC/NIST PS20. The timber shall be treated in accordance with Use Category UC5B of AWPA U1 with waterborne preservatives listed in AWPA P5. Flashboards shall be 4 inch nominal thickness.

2.1.1 Brush-Applied Preservative Treatment

AWPA M4.

2.2 AGGREGATE MATERIAL

Submit certificates from the aggregate material suppliers, attesting that the materials conform to the project requirements; based on independent laboratory tests performed within the last 5 years. If test results are not available, the required testing shall be performed before the material can be approved for use on this project. Submit certification that recycled material being used as graded aggregate is neither hazardous nor toxic.

2.2.1 Crushed Aggregate Ramp

Coarse aggregate shall be as specified in 703.2 of PennDOT Publication 408.

Quality of aggregate shall be as specified for Type B in Table B and gradation shall be as specified for PennDOT Type 2A in Table C of the same section, or an approved equal.

2.2.2 Aggregate Fill for Inlet Boxes

Aggregate gradation size No. 1 in accordance with AASHTO M 43.

PART 3 EXECUTION

3.1 INSPECTION

Inspect the work, keep records of work performed, and ensure that gages, targets, ranges, and other markers are in place and usable for the intended

Section 35 20 23 Page 7 purpose. Furnish, at the request of the Contracting Officer, boats, boatmen, laborers, and materials necessary for inspecting, supervising, and surveying the work. When required, provide transportation for the Contracting Officer and inspectors to and from the disposal area and between the dredging plant and adjacent points on shore.

3.2 CONDUCT OF DREDGING WORK

The Contractor must turn off the dredge cutterhead while moving anchors, until the anchors are relocated and the derrick is out of the cutterhead swing radius of the dredge.

3.2.1 Lights

Each night, between sunset and sunrise and during periods of restricted visibility, provide lights for floating plants, pipelines, ranges, and markers. Also, provide lights for buoys that could endanger or obstruct navigation. When night work is in progress, maintain lights from sunset to sunrise for the observation of dredging operations. Lighting shall conform to United States Coast Guard requirements for visibility and color.

3.2.2 Ranges, Gages, and Lines

Furnish, set, and maintain ranges, buoys, and markers needed to define the work and to facilitate inspection. Establish and maintain gages in locations observable from each part of the work so that the depth may be determined. Suspend dredging when the gages or ranges cannot be seen or followed. The Contracting Officer will furnish, upon request by the Contractor, survey lines, points, and elevations necessary for the setting of ranges, gages, and buoys.

3.2.3 Plant

Maintain the plant, scows, coamings, barges, pipelines, and associated equipment to meet the requirements of the work. Promptly repair leaks or breaks along pipelines. Remove dredged material placed due to leaks and breaks.

3.2.4 Dredging

The material excavated shall be transported, deposited, confined and graded to drain as specified within the disposal areas shown on the drawings. The following disposal areas will be available for use under this contract:

a. Pedricktown South

b. Fort Mifflin Cell C

c. Reedy Point North and South

Material from Wilmington Harbor shall only be placed in Pedricktown South Disposal Area.

3.2.5 Misplaced Material

Material deposited in places other than those designated or approved by the Contracting Officer, or which escapes from such places, is prohibited, and will not be paid for. The Contractor may be required to remove such misplaced material in accordance with Contract Clause titled: "OBSTRUCTION

Section 35 20 23 Page 8

OF NAVIGABLE WATERWAYS", and deposit it where directed at no additional cost to the Government.

3.2.6 Hopper Dredging

Hopper dredging will not be permitted under this contract.

3.2.7 Hydraulic Dredging

Excavate material by hydraulic pipeline dredge and transport the material by pipeline to final discharge position in the approved disposal area(s) without the use of rehandling basins or placing in scows or other similar vessels. Keep pipelines in good condition at all times, and promptly and properly repair leaks or breaks. Clear and remove materials that leak from pipelines on or around access roads, and place within the limits of the disposal area by a means which will preclude any loss of material to the river prior to deposition in the disposal areas.

3.2.8 Bucket Dredging

Bucket dredging will not be permitted under this contract.

3.2.9 Government Quality Control Monitor

The Government may place a Government monitor aboard the Contractor's dredge or supporting vessels to monitor quality control conditions during dredging and disposal operations. See Section 01 30 00 ADMINISTRATIVE REQUIREMENTS, of this specification, paragraph titled "ACCOMMODATIONS AND

MEALS FOR GOVERNMENT INSPECTORS".

3.2.10 Submerged Pipeline

If a leak occurs in the discharge pipeline, immediately discontinue using the line until leaks are repaired. Remove material placed due to leaks or breaks.

3.2.11 Floating Pipeline

Should the Contractor's pipeline not rest on the bottom, it will be considered a floating pipeline and shall be visible on the surface and clearly marked. In no case will the Contractor's pipeline be allowed to fluctuate between the surface and the bottom, or lie partly submerged.

Lights shall be installed on the floating pipeline as required in Section

01 30 00 "SIGNAL LIGHTS".

3.2.12 Navigation Warnings

Furnish and maintain navigation warning signs along the pipeline.

3.2.13 Method of Communication

Provide a system of communication between the dredge crew and the crew at the disposal area. A portable two-way radio is acceptable.

3.2.14 Salvaged Material

Anchors, chains, firearms, and other articles of value, which are brought to the surface during dredging operations, shall remain or become the property of the Government and shall be deposited on shore at a convenient

Section 35 20 23 Page 9 location near the site of the work, as directed.

3.2.15 Plant Removal

Upon completion of the work, promptly remove plant, including ranges, buoys, piles, and other markers or obstructions.

3.3 DEVELOPMENT AND OPERATION OF DISPOSAL AREAS

3.3.1 Contractor Coordination

a. No disposal area work shall begin prior to a disposal area preparatory meeting and site visit. Coordinate with Project Engineer at least 14 days prior to mobilization to disposal area.

b. At least 7 days prior to the use or modification of any Government-owned land or facilities, the Contractor shall contact Mr. Tim Rooney, Project Manager, at 215-656-6592.

3.3.2 General

a. Submit a Disposal Area Plan prior to the use or modification of any Government-furnished disposal areas. Include in the plan necessary site specific sluice modifications. Conduct all work in accordance with the approved plan; however, approval of the plan by the Contracting Officer does not in any manner relieve the Contractor of his responsibility for the adequacy of the design and construction of the required structures and drainage facilities. The Contractor is responsible for the maintenance and repair of all Government-owned land, roads, and facilities used by him under the contract. Remove all Contractor-owned dredging pipe(shore or submerged) used in the contract work, from the site within 30 days of completion of all dredging work.

b. Take all necessary measures to ensure that the condition of the disposal area, namely the dike, does not deteriorate or become damaged due to the pumping of dredged material into the site. Take every precaution to meet each of the requirements outlined in this specification in order to maintain the integrity of the disposal area. Stop pumping into the disposal area and contact the Contracting Officer immediately if seepage occurs on the exterior toe of the dike.

3.3.3 Outfall Extensions

a. Install temporary extensions to the three 30-inch diameter sluice outfall pipes at the Pedricktown South Disposal Area. Extend each sluice pipe into the Delaware River 500 feet or mean lower low water, whichever is greater. Follow USCG regulations concerning the location of pipeline structures in a waterway. Secure each pipe extension to the respective sluice outfall pipe to prevent dislodging during pipeline flow and inclement weather. Anchor the extensions to withstand the strong currents experienced during both flood and ebb tides in the work area to maintain alignment.

b. Prior to the performance of work on the sluice outfall pipe extensions, submit an Outfall Extension Work Plan which shows the proposed sluice outfall pipe extensions and anchoring details. Include a description of the proposed method for anchoring and securing the pipes as required by these specifications. Include sketches showing plan and elevation views and details for the proposed method and data on the materials to be used.

Section 35 20 23 Page 10

c. The extension pipes shall be temporary and upon completion of the work, the materials shall be removed and become the property of the Contractor.

d. No excavation will be required to perform this work.

3.3.4 Disposal Area

a. Existing Government-furnished retaining dikes, sluices and drainage structures are available for use. Clear the area within and around the sluices of all vegetation and debris, and make all repairs, strengthening, extensions and modifications to such facilities as are necessary for confining the excavated material and for controlling disposal area effluent, until acceptance of all work under the contract. The Contractor will be permitted, in the Government-furnished disposal area, to construct any other structures or use any means necessary to control the dredge effluent as required to meet these specifications, with prior approval from the Contracting Officer. All work done in the disposal area by the Contractor shall be consistent with the approved disposal area plan.

b. Maintain, repair and stabilize all land, dikes, roads and structures used under the contract, and inspect the dikes on a daily basis to assure their safety and stability. Restore all dikes, roads, structures and areas disturbed through contract operations to a satisfactory condition as approved by the Contracting Officer, at no additional cost to the Government. The Government will have the right to regulate the use of the disposal areas throughout the contract. Do not disturb existing piezometers and wells within the disposal area limits. Piezometers or wells disturbed by the Contractor will be replaced by the Government at the Contractor's expense.

c. Contractor-furnished pipeline(s) shall enter the approved disposal area only within the limits shown on the drawings. The Contracting Officer reserves the right to direct the extension of the Contractor-furnished pipeline beyond the discharge limits shown on the contract drawings, or to a specific location within the disposal area, if required for efficient management of the disposal area. Make provisions to prevent erosion of the dike embankment at the discharge point. Unless otherwise noted on the contract drawings, the end of the discharge pipe shall be located not less than 40 feet beyond the interior toe of the dike. This length of pipe inside the disposal area shall be sufficiently and safely supported along the entire length by timber cribbing, a compacted earthen embankment or other means approved by the Contracting Officer. In addition, the pipe shall be angled in the horizontal plane such that the discharge does not scour the slope face or the toe-of-slope in the vicinity of the discharge area. The Government reserves the right to make the Government-furnished disposal area available for use by others when not in use as part of any work assignment under this contract. Obtain written permission from the Contracting Officer prior to entering on or utilizing any property owned or leased by the Government other than the diked disposal areas.

d. Construct a crushed aggregate ramp as shown on the contract drawings to protect the discharge pipe where it crosses the existing access road.

Construct the access ramp to the width of the access road, and compact the aggregate around the discharge pipe.

3.3.5 Additional Disposal Area Requirements

a. Borrow for diking material may be obtained from within the disposal

Section 35 20 23 Page 11 areas but not closer than 50 feet from the inside toe of the dike sections. Wet or dry borrow material as required to obtain optimum practical moisture content. Borrow material and the ground surface upon which it is to be placed, shall be free of all debris, timber and accumulations of vegetation. Place dike material in approximately equal layers not exceeding 12 inches in loose thickness and compact by the controlled traffic of spreading and/or hauling equipment over each layer.

Borrowing of material from the area outside the existing perimeter dikes will not be permitted. Provide impervious material required for mitigation of seepage problems during disposal operations from an approved off-site source if suitable material is unavailable from within the disposal area.

b. Maintain a freeboard of two feet or more, measured vertically between the retained slurry and the top of the adjacent confining dikes. If the required freeboard is not met, stop pumping into the disposal area until corrective means that are satisfactory to the Contracting Officer have been taken.

c. Pipe type sluices are not permitted through exterior dikes, and the dredge pipe shall not enter the disposal area through an exterior dike.

The hydraulic placing of perimeter dikes is not permitted.

d. Perform modifications to the disposal areas that prevents obstruction of drainage on upland areas adjacent thereto, and to leave free, clear and unobstructed outfalls of sewers, drainage ditches, and other structures affected by the disposal operations. Distribute dredged material within the used portion of the disposal areas in a reasonably uniform manner that allows the disposal surface area to drain after disposal operations have ceased without creating excessive ponding on the fill surface.

e. Submit a detailed plan of the proposed Sluice Walkway. In accordance with the approved Sluice Walkway Plan, construct structurally sound access walkways with handrails on both sides of the walkway from the dikes to the sluices throughout their length, and a walkway in a "T" formation along the front of the sluices to enable the inspector to readily obtain the samples of the mixture going over the discharge box interior weir as hereinafter specified. Timber used to construct the walkways and handrails shall be in accordance with the requirements of the Paragraph titled "TIMBER FOR FLASHBOARDS AND SLUICE BOX WALKWAYS" and in accordance with Section 21 of

EM 385-1-1.

f. Prior to pumping material into the disposal areas, inspect the existing sluice fall protection by a qualified person as defined in EM 385-1-1.

Remove existing systems not meeting this approval, and install a new system in accordance with EM 385-1-1. Submit the Fall Protection Inspection Report of the existing system and design data for new systems. Submit a site specific plan of any proposed walkway to be installed or changed. For bidding purposes, assume new fall protection systems are required.

g. Provide full body safety harnesses for employees and Government inspectors during the installation and removal of flashboards and the taking of samples from the effluent sampling location in the discharge box. Each person working on the sluice shall wear a safety harness as described in the approved site specific fall protection plan. A competent person in fall protection is required at the sluice box when fall protection is being used to add or remove boards.

h. Provide a minimum of 2 personnel at a disposal area when work (disposal or other) is being performed at a disposal area. Provide a generator with

Section 35 20 23 Page 12 a light plant sufficient to light the sluice area during darkness. Provide disposal area personnel two-way radio communication with the dredge at all times.

i. Perform routine inspections of the dikes prior to the start of dredging operations and at least twice a day during dredging operations. Conduct inspections along the entire perimeter of the disposal area, concentrating on the condition of the dike to ensure its integrity. If any signs of distress are noted during any inspection, pumping of dredged material must stop immediately and the Contractor shall notify the appropriate Army Corps personnel. Typical signs of distress may include excessive seepage, fissures and slope failures.

j. Government Pipelines and Sluices: Unless otherwise shown, Government-owned pipelines will not be available for use by the Contractor. If the Contractor uses the existing sluices for this work, he shall be responsible for their maintenance. Prior to dredging operations, perform the following:

(1) Inspect sluice boxes for damage and/or deteriorated flashboards and steel framework in the presence of the Contracting Officer. Remove existing flashboards and provide new flashboards prior to deposition of dredged material into the structure, and any deteriorated or damaged steel framework shall be repaired as directed by the Contracting Officer.

(2) Remove dirt, mud, and debris from inside the sluice box.

(3) If not already completely filled, fill the entire bottom of the inlet box with 12 inches of AASHTO No. 1 coarse aggregate (nominal size

2.5 inches), as shown on the figure included at the end of this section.

(4) During dredging operations, if a flashboard(s) deteriorates and there is no viable disposal option, grafting of plywood to weakened sluice walls may be utilized as a temporary fix as directed by the Contracting Officer. Polyethylene sheeting may also be attached to the outside flashboards to control seepage through the boards as directed by the Contracting Officer. However, as soon as practicable, remove and replace deteriorated flashboards with new wood. These sluices shall be functional and returned to the Government at the completion of the work assignment and shall be free of all damage except for normal wear and tear.

(5) Conduct a preparatory meeting with the COR for the inspection of the disposal area, sluice and fall protection systems.

k. Government Modifications of Disposal Areas: The Government may perform modifications to its disposal areas during periods when they are not being used for work under this contract. The Government-constructed embankments will enclose sufficient volume for retention of the pumped discharge for the production rates specified in paragraph "Computation of Completion Times".

l. Inspect the disposal area and sluice after work is complete and after the water has drained from the area.

m. Report apparent seepage, stability, or safety problems immediately to the Contracting Officer and Project Engineer.

Section 35 20 23 Page 13

3.4 CONTROL OF DISPOSAL AREA EFFLUENT

3.4.1 General

Monitor disposal area conditions to preclude excessive ponding as described under paragraph titled: "Additional Requirements for Disposal Areas", and maintain effluent quality as prescribed below. Review sluice height on a continuing basis to insure that the optimum height needed to satisfy both of these requirements are employed at all times. Raise the elevation of the crest of the sluice or stop pumping into the disposal area and permit the fill to settle, to ensure that the density of the mixture of suspended solids discharged over the sluice remains less than 4 grams per liter.

This shall include disposal areas where material is being hydraulically rehandled in accordance with the Paragraph titled: "DISPOSAL OF DREDGED MATERIAL". In addition, the sluice height shall be managed in accordance with the special requirements described under paragraph "Sluice Management" below.

a. Do not allow the density of the effluent discharged over the sluice to exceed: 1) 4.0 grams/liter at any time.

b. Maintain the pH of the effluent between 6 and 9 standard units at all times.

3.4.2 Sluice Management

To prevent "floating" of the sluice during filling and to ensure its proper performance, follow the special sluice management practices listed below.

Refer to the attached figure at the end of this section for sluice box nomenclature.

a. Fill the inlet box on each sluice with water to stabilize the box and prevent it from floating. Such filling shall be done before raising the entire flashboard elevation and such that the following criteria is maintained at all times:

(1) At no time shall the head difference (i.e., difference in water elevations) between the inside and outside of the inlet box be more than half the height of water outside the box. For example, if it is anticipated that there will eventually be 6 feet of water outside the box, first allow half as much water into the inlet box, (i.e., 3 feet of water), before boarding up the inlet box to its required final elevation.

b. Maintain the top of exterior flashboards around the inlet box at the same elevation to the maximum extent possible.

c. Maintain the top of all exterior flashboards around the discharge box at least 8 inches, (i.e., 2 boards), above the top of the exterior flashboards around the inlet box.

d. Set the interior weir between the inlet and discharge boxes 1 to 2 feet lower than the elevation of the exterior flashboards around the inlet box.

e. Remove and properly dispose of all floating debris lodged in and around the sluice boxes.

f. In order to minimize leaks, place burlap bags or an approved

Section 35 20 23 Page 14 equivalent between the flashboards to act as a gasket and seal gaps that may exist between the boards. Weight or wedge flashboards into place to prevent them from floating.

3.4.3 Effluent Sampling and Testing

Take and test samples for density determination, and record the results.

Take samples at the sluice as often as required and at least twice daily at times when the flow is at the maximum rate and after the dredge has been operating continuously for not less than the time required for solids in suspension to flow from the discharge pipe to the sluice. Increase the minimum frequency of sampling at the sluice when effluent density increases or nears the maximum specified. Record density determinations, including times of sampling, on the Daily Report of Operations forms required in paragraph "CONTRACTOR QUALITY CONTROL" of this section. Include the hydrometer readings (expressed in Grams/Liter) in the daily reports in RMS.

Collect each sample at the sluice from the mixture flowing over the discharge box interior weir as shown on the attached figure. Make a composite sample by partially filling, without overflow, a one-quart container for five or six consecutive intervals such that a total of about 1 gallon is collected and combined in a bucket or other suitable container. Determine the composite sample density by the hydrometer method, no more than 5 minutes after collecting the first one-quart container sample, otherwise discard the sample and make up a new one.

a. Hydrometer Method: The hydrometer used to determine the composite sample density shall be a soil hydrometer conforming to ASTM E100, Hydrometer No. ASTM 152H, -5 to +60 grams per liter. This specified hydrometer reads density directly in grams per liter, so no other computations are required to determine density. Submit the proposed hydrometer brand and model for approval prior to commencing dredging operations. Use the hydrometer as specified by the manufacturer.

NOTE: The sampling required in this section is not to be confused with sampling and analysis that may be performed by others for the purpose of reporting data to Pennsylvania DEP.

3.4.4 Records

Submit records of disposal area effluent measurements and corrective action taken daily to the Contracting Officer.

3.4.5 Timber Flashboards

Prior to commencement of pumping, provide a sufficient number of flashboards for the sluices as required for the retention of dredged material under this contract and ensure that the entire sluice length is effective. Brush applied preservative treatment shall be available at the site and all cut surfaces shall be heavily brushed as specified in AWPA M4.

3.4.6 Continuing Effluent Control

Upon completion and acceptance of a work assignment, provide continuing, intermittent labor to ensure that effluent control is continued beyond the completion of dredged discharge into the disposal area. Continue the control, including the removal of flashboards, until water impoundment is reduced to that which existed prior to the commencement of disposal into this area. The time required for effluent control beyond completion and acceptance of the work assignment will not be considered part of the

Section 35 20 23 Page 15 completion time for the contract.

3.5 OVERDEPTH, SIDE SLOPES, AND EXCESSIVE DREDGING

3.5.1 Overdepth

Material removed from within a work assignment area or acceptance section, to a depth of not more than 1 foot below the required depth, limited by a vertical plane through the required depth contour, will be estimated and paid for at the contract unit price for removal and disposal of material.

3.5.2 Side and End Slopes

a. No side or end slopes are specified for this contract (box cut).

b. For Wilmington Harbor, Christina River, computation of payment quantities will be to the specified depth within the channel edges for areas requiring dredging, with the following exceptions: Dredging will be required to a distance of 25 feet outside the North Channel edge, north turning basin edges, and entrance widening (flare), when required dredging depths exist inside the channel and basin, along the perimeter of the north edge.

c. For the Delaware River channel, dredging is required to a distance of 25 feet outside the channel limits when required dredging depth exists at the toe of the channel.

d. See drawings for typical sections.

3.5.3 Excessive Dredging

Material taken from beyond the limits specified in the Paragraphs titled:

"Overdepth" and "Side and End Slopes", will be deducted from the total amount dredged as excessive dredging for which payment will not be made.

Nothing herein shall be construed to prevent payment for the removal of shoals performed in accordance with the applicable requirements of the Contract Clause "FINAL EXAMINATION AND ACCEPTANCE" and Section 01 30 00 ADMINISTRATIVE REQUIREMENTS, paragraph titled "SHOALING".

3.6 ESTIMATED QUANTITIES

The total estimated quantity of material necessary to be removed within the specified limits as shown on the drawings, including allowable overdepth and areas outside the channel and anchorage limits as previously specified, is as follows for each of the areas of work or work assignments:

WILMINGTON HARBOR, CHRISTINA RIVER Project Depth Available Total Required to Overdepth Available Area of Work Station to Station 35 ft (CY) (1 ft)(CY) (CY)

AS-1: 0+000 to 1+650 80,000 20,000 100,000

Project Depth Available Total Required to Overdepth Available Area of Work Station to Station 38 ft (CY) (1 ft)(CY) (CY)

AS-2: 1+650 to 3+600 230,000 40,000 270,000

Section 35 20 23 Page 16

AS-3: 3+600 to 4+600 150,000 15,000 165,000

AS-4: 4+600 to 6+236 100,000 15,000 115,000

Total Wilmington Harbor 560,000 90,000 650,000

DELAWARE RIVER Project Depth Available Total Required to Overdepth Available Work Assignment Station to Station 45 ft (CY) (1 ft)(CY) (CY)

Marcus Hook 117+000 to 129+000 750,000 150,000 900,000

Deepwater Point 187+000 to…