AMEND-0002_W9126G-17-B-0011.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

2. AMENDMENT/MODIFICAITON NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicble)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICIATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 11)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

Offers 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 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 your 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 APPROPIRATION DATA (If required)

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

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

CHECK ONE 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.

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.

15C. DATE SIGNED

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

16C. DATE SIGNED

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

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

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

NSN 7540-01-152-8070

Previous edition unusable m3adekaj

W9126G-17-B-0011

A0002-2

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

1. THE SPECIFICATIONS FOR SOLICITATION NO. W9126G-17-B-0011, GULF

INTRACOASTAL WATERWAY, TEXAS, MAIN CHANNEL ACROSS SAN ANTONIO BAY

IN CALHOUN AND ARANSAS COUNTIES, TEXAS, PIPELINE DREDGING, ARE HEREBY

AMENDED AS FOLLOWS:

a) Specifications.

(1) SECTION 35 20 23.16 45, PIPELINE DREDGING – The enclosed SECTION 35 20 23.16 45, entitled PIPELINE DREDGING, supersedes that issued with this Solicitation.

b) Drawings.

(1) None.

2. This amendment shall be attached to and become a part of the solicitation.

1 Encl:

1. SECTION 35 20 23.16 45, PIPELINE DREDGING

SWG FILE NO.IWW 1150-1128 SOLICITATION NO.W9126G-17-B-0011

SECTION TABLE OF CONTENTS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

SECTION 35 20 23.16 45

PIPELINE DREDGING

PART 1 GENERAL

1.1 SUMMARY

1.2 MEASUREMENT AND PAYMENT

1.3 WORK COVERED BY CONTRACT PRICE

1.3.1 Existing Conditions

1.4 REFERENCES

1.5 SUBMITTALS

1.6 CHARACTER OF MATERIAL

1.6.1 Debris Within the Dredging Limits

1.7 EASEMENTS

1.8 UTILITIES ACROSS THE LIMITS OF DREDGING

1.8.1 Known Pipeline/Utility Crossings

1.9 ORDER OF WORK

1.9.1 Dredging Options

1.10 OBSTRUCTION OF CHANNEL

1.11 TEMPORARY REMOVAL OF AIDS TO NAVIGATION

1.12 NOTIFICATION PRIOR TO COMMENCEMENT OF DREDGING OPERATIONS

1.13 SIGNAL LIGHTS (CESWG)

1.14 PLANT

1.14.1 General Requirements

1.14.2 Capacity

1.14.3 Inspectors (Government Agents) Transportation

PART 2 PRODUCTS

2.1 BRIDGE-TO-BRIDGE RADIOTELEPHONE EQUIPMENT

2.2 TURBIDITY BARRIERS

2.2.1 General

2.2.2 Turbidity Barrier Fabric

2.2.3 Floats

2.2.4 Anchors and Weights

2.2.5 Installation Advisor

PART 3 EXECUTION

3.1 ESTIMATED QUANTITY OF MATERIAL

3.1.1 Quantity Summary

3.1.2 Required Dredging Prism

3.1.3 Allowable Overdepth

3.1.4 Side And End Slopes

3.1.5 Excessive Dredging

3.2 AREAS TO BE DREDGED

3.3 CONDUCT OF DREDGING WORK

3.3.1 Protection of Existing Waterways

3.3.2 Adjacent Property and Structures

SECTION 35 20 23.16 45 Page 1

(TO ACCOMPANY AMENDMENT 0002 TO SOLICITATION NO. W9126G-17-B-0011)

3.4 PLACEMENT OF EXCAVATED MATERIAL

3.4.1 General

3.4.2 Placement Areas

3.4.2.1 Open Water or Partially Emergent Unconfined Placement Area

No. 123

3.4.2.2 Open Water or Partially Emergent Unconfined Placement Area

No. 125

3.4.2.3 Beneficial Use Site A (BUS A)

3.4.2.4 Beneficial Use Site B (BUS B)

3.4.2.5 Sidecast Retaining Berms

3.4.2.6 Matagorda Ship Channel (MSC) Placement Area No. 3 (Sundown

Island)

3.4.2.7 (AM#2)Placement Area No. 117A (Beach Nourishment)

3.4.2.7.1 Dredge-size Restrictions and Limitations

3.4.2.7.2 Beach Placement Activities

3.4.2.7.3 Protection of Existing Structures

3.5 PRESERVATION OF PUBLIC AND PRIVATE PROPERTY

3.5.1 Damages

3.5.2 Accountability and Restoration

3.6 ALTERNATE PLACEMENT AREA(S) PROPOSED BY CONTRACTOR WITH BID AFTER

AWARD OF CONTRACT

3.6.1 Data Submittal

3.7 METHOD OF PLACEMENT

3.7.1 Pipeline Route

3.8 DISPOSAL IN PLACEMENT AREA

3.8.1 Utilities within the Placement Area

3.8.2 Unauthorized Placement of Material

3.8.3 Debris Disposal

3.9 DREDGE PIPELINES

3.9.1 Submerged Pipeline

3.9.2 Submerged Pipeline Lighting Requirements

3.9.3 Floating Pipeline

3.9.4 Pipeline Leaks

3.9.5 Pipeline Inventory Management

3.10 WORK IN THE VICINITY OF OTHER GOVERNMENT CONTRACTORS

3.11 DREDGING AND DREDGE RELATED MARINE WORK (CESWG)

3.12 AUTOMATIC IDENTIFICATION SYSTEM

3.13 DREDGE PLANT INSTRUMENTATION

ATTACHMENTS:

Appendix 1 - QUANTITY SUMMARY TABLE

-- End of Section Table of Contents --

SECTION 35 20 23.16 45 Page 2

SECTION 35 20 23.16 45

PIPELINE DREDGING

AMENDMENT NO. 0002

PART 1 GENERAL

1.1 SUMMARY

The work in this Section consists of furnishing plant, labor, materials, and equipment and performing the operations necessary for the removal of materials to the required dimensions shown, satisfactory disposal thereof, and other operations incidental thereto.

1.2 MEASUREMENT AND PAYMENT

Measurement and payment for pipeline dredging will be paid for in accordance with provisions of the SECTION 01 22 00.10 MEASUREMENT AND

PAYMENT.

1.3 WORK COVERED BY CONTRACT PRICE

Base bids on the quantity of dredging indicated. If the total quantity of dredging varies from that specified as the basis for bidding, the Contract price will be adjusted in accordance with SECTION 01 10 00.01 45 NON-REGULATED SPECIAL CONTRACT REQUIREMENTS, Paragraph: VARIATION IN ESTIMATED QUANTITIES - DREDGING. The dredging conditions specified and indicated describe conditions which are known. However, the Contractor is responsible for other conditions encountered which are not unusual when compared to the conditions recognized in the dredging business as usual in dredging activities such as those required under this Contract. The Contract price for dredging will include the cost of removal and placement of the material as specified in the Paragraphs: CHARACTER OF MATERIAL and PLACEMENT OF EXCAVATED MATERIAL. The Contract price for dredging shall include the costs for maintenance of levees and ditches necessary to confine the material within the areas shown.

1.3.1 Existing Conditions

The drawings already prepared as specified in the CONTRACT CLAUSES Paragraph entitled CONTRACT DRAWINGS AND SPECIFICATIONS represent conditions existing as of the date of their preparation using average existing conditions. However, to reflect anticipated shoaling occurring between the dates of preparation of the drawings and the dates of the "before-dredging" sections, the estimated dredging quantities stated in the Bid Schedule have been adjusted accordingly. The depths and elevations shown will be verified and corrected by fathometer soundings taken by the Government before dredging. The Government will normally use a frequency of 200 kHz to conduct hydrographic surveys. If the surveys indicate the presence of fluff in the channel, a frequency of 40 kHz will be used.

Determination of quantities removed and the deductions made from them to determine quantities by in-place measurement to be paid for in the area specified, after having once been made will not be reopened, except on evidence of collusion, fraud, or obvious error.

SECTION 35 20 23.16 45 Page 3

1.4 REFERENCES

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

U.S. ARMY CORPS OF ENGINEERS (USACE)

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

1.5 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 the SECTION 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Notification Prior To Commencement of Dredging Operations; G

Indicate commencement of dredging operations, and location of dredge(s).

Temporary Removal of Aids To Navigation; G

SD-02 Shop Drawings

Submerged Pipeline; G

Indicate pipeline location and installation details as outlined in the Subparagraph: Submerged Dredge Pipeline.

Pipeline Route; G

A detailed pipeline diagram for each Placement Area detailing the pipeline route and anchor locations shall be submitted prior to commencing work on this project.

SD-04 Samples

Turbidity Barrier Fabric

Submit one sample of Turbidity Barrier Fabric as outlined in Subparagraph: Turbidity Barrier Fabric.

1.6 CHARACTER OF MATERIAL

The material to be removed is shoals which have accumulated over a period of time. This contract represents a transition from the use of the Mean Low Tide (MLT) datum to the Mean Lower Low Water (MLLW) datum. As a result, the Government anticipates that virgin material may be encountered in the allowable overdepth and/or side slope dredging. Bidders are expected to examine the worksite and the records of previous dredging, which are available upon request from the Corpus Christi Resident Office and after investigation decide for themselves the character of materials.

SECTION 35 20 23.16 45 Page 4

1.6.1 Debris Within the Dredging Limits

Debris including but not limited to, metal bands, pallets, pieces of broken cable, rope, stumps, and broken piles may be encountered. The Government has no knowledge of existing wrecks, wreckage, or other material of that size or character as to require the use of explosives or special or additional plant for its economical removal. Debris removed from the dredged area shall be removed from the water. Disposal shall be the responsibility of the Contractor and disposal shall be outside the limits of Government property. If the actual conditions differ from those stated or shown, an adjustment in Contract price or time of completion, or both, will be made in accordance with the CONTRACT CLAUSE entitled DIFFERING SITE

CONDITIONS.

1.7 EASEMENTS

Restrictions on laying of shore pipe and placement of dredge material in the Placement Area(s) are as shown in these specifications and attached drawings.

1.8 UTILITIES ACROSS THE LIMITS OF DREDGING

It is the Contractor's responsibility to investigate the location of utility crossings. The Contractor shall take precautions against damages which can result from dredging operations in the vicinity of the utility crossings. If damage occurs as a result of dredging operations, the Contractor will be required to suspend dredging until the damage is repaired and approved. Costs of these repairs and downtime of the dredge and attendant plant shall be at the Contractor's expense.

1.8.1 Known Pipeline/Utility Crossings

There are pipelines and or utilities which are within the work limits. The following pipeline/utilities cross the area(s) to be dredged:

Approximate Station

Permit No. Description Owner

1101+763 16247 One 2 and 7/8-inch pipeline One 4 and 1/2-inch pipeline

General Atlantic Resources, Inc.

1102+281 7461/3371 One 12-inch pipeline Houston Pipe Line Co.

1108+419 16715 One 24-inch pipeline Northern Natural Gas Co.

EVERY EFFORT HAS BEEN MADE TO GIVE ALL PERTINENT DETAILS ON THE LOCATION OF

PIPELINES/UTILITIES. THE DATA FURNISHED ON THE PLANS ARE BELIEVED TO BE

SUBSTANTIALLY CORRECT. HOWEVER, THE EXACT LOCATIONS MAY VARY FROM THAT

SHOWN: THEREFORE THE CONTRACTOR SHALL COOPERATE WITH THE RESPECTIVE OWNERS

TO ESTABLISH THE ACTUAL POSITION OF THE PIPELINES/UTILITIES. THE U.S. ARMY

CORPS OF ENGINEERS PERMITS OF THE RESPECTIVE PIPELINES AND PREVIOUS SURVEYS

ARE AVAILABLE UPON REQUEST FROM THE CORPUS CHRISTI RESIDENT OFFICE.

THE FOLLOWING IS FURNISHED FOR INFORMATION ON VERIFYING PIPELINE OWNERSHIPS:

Lonestar Notification Center

SECTION 35 20 23.16 45 Page 5

1-713-223-4567 or 1-800-669-8344

Texas 811 (Dig-Tess) 1-800-344-8377

1.9 ORDER OF WORK

There are two major environmental windows that affect the work to be performed under this contract. As such, the Contractor shall schedule dredging and placement operations as follows:

(1) The Contractor shall commence dredging Sections 1-10, Sections 11-13 (if awarded), and Sections 14-15 (if awarded) in the order it desires. These areas and associated placement locations are within the Whooping Crane Critical Habitat. All dredging in these sections and all placement activities at Beneficial Use Site A, Beneficial Use Site B, and Open Water Placement Area No. 125, must be completed by 15 October 2017 to avoid impacting the winter nesting of the Endangered Whooping Crane.

(2) The Contractor shall commence dredging Sections 16-18 (if awarded) in the order it desires. Placement activities at Sundown Island are restricted by the presence of nesting colonial water birds. Dredging of Sections 16-18(AM#2)17 and subsequent placement of dredge material at Sundown Island (AM#2)and Placement Area 117A shall begin no earlier than 01 September 2017.

The Government reserves the right to change the order of work at any time.

1.9.1 Dredging Options

The Government will award Dredging Options as specified.

1.10 OBSTRUCTION OF CHANNEL

The Government will not undertake to keep the Channel free from vessels or other obstructions, except to the extent of applicable regulations, if any, as may be prescribed by the Secretary of the Army, in accordance with the provisions of Section 7 of the River and Harbor Act approved 8 August 1917. The Contractor will be required to conduct the work using a method that will obstruct navigation as little as possible, and if the Contractor's plant does obstruct the Channel and makes passage of vessels difficult or endangers them, the plant shall be promptly moved on the approach of a vessel as far as may be necessary to afford a practicable passage.Upon completion of the work, the Contractor shall promptly remove its plant, including ranges, buoys, piles, and other marks placed under this Contract.

1.11 TEMPORARY REMOVAL OF AIDS TO NAVIGATION

The temporary removal or changes in locations of channel markers may be required to facilitate dredging operations. The Contractor shall notify the Contracting Officer at least 21 calendar days prior to the date that the removal or change in location of channel markers will be required so the U.S. Coast Guard can perform the work and so navigation interests may be informed sufficiently in advance of the proposed removal or change in location.

The Contractor shall not remove, change the location of, obstruct, SECTION 35 20 23.16 45 Page 6 willfully damage, make fast to, or interfere with aids to navigation.

Indicate temporary removal or changes in locations of channel markers required to facilitate dredging operations.

1.12 NOTIFICATION PRIOR TO COMMENCEMENT OF DREDGING OPERATIONS

Notify the Resident Engineer, Corpus Christi Resident Office, in writing, at least 10 calendar days prior to commencement of dredging operations, the location or locations at which a dredge or dredges will be placed on the work. This information is required in addition to the progress charts and schedule provided for in the CONTRACT CLAUSE entitled SCHEDULE FOR

CONSTRUCTION CONTRACTS.

1.13 SIGNAL LIGHTS (CESWG)

The Contractor shall display signal lights and conduct its operations in accordance with the General Regulations of the Department of the Army and of the U.S. Coast Guard governing the:

i) lights and day signals to be displayed by towing vessels with tows on which no signals can be displayed, vessels working on wrecks, dredges, and vessels engaged in laying cables or pipe or in submarine or bank protection operations;

ii) lights to be displayed on dredge pipe lines;

iii) day signals to be displayed by vessels of more than 65 feet in length moored or anchored in a fairway or channel;

iv) and the passing by other vessels of floating plant working in navigable channels as set forth in United States Coast Guard publication entitled Navigation Rules and Regulations Handbook. Web site location:

http://www.navcen.uscg.gov/?pageName=navRuleChanges

1.14 PLANT

1.14.1 General Requirements

Keep the necessary dredge equipment and attendant plant on the job to meet the requirements of the work. The dredge equipment and attendant plant shall be in satisfactory operating condition and capable of safely and efficiently performing the work as set forth in specifications and shall be subject to inspection by the Contracting Officer's representative at all times.

1.14.2 Capacity

No reduction in the capacity of the dredge equipment and attendant plant employed to execute the work shall be made except by written direction of the Contracting Officer. The measure of the "Capacity of the Dredge and Attendant Plant" shall be its actual performance on the work to which these specifications apply.

1.14.3 Inspectors (Government Agents) Transportation

Furnish throughout the Contract period, for the exclusive use of the Government: a motorboat, minimum 18 feet in length, with enclosed cabin, a

SECTION 35 20 23.16 45 Page 7 minimum of a 50 horsepower motor and equipped with safety equipment as required by EM 385-1-1. Furnish fuel, oil, and maintenance for the motorboat throughout the Contract period. Assume full responsibility for the storage and security of the motorboat when not in use by the Government employees. There shall be no separate payment for these items and the cost shall be distributed throughout the existing bid items. Equipment which fails to perform because of insufficient power or other mechanical deficiencies shall be replaced and inexperienced operators unable to operate the equipment shall be replaced within 12 hours after the Contractor is directed to do. No smoking shall be allowed inside the cabin and operator's space while occupied by Government personnel. No Smoking signs shall be posted.

PART 2 PRODUCTS

2.1 BRIDGE-TO-BRIDGE RADIOTELEPHONE EQUIPMENT

Dredge and self-propelled attendant floating plant shall be radiotelephone equipped to comply with the provisions of the Vessel Bridge-to-Bridge Radiotelephone Act (Public Law 92-63). This will require, as a minimum, the radiotelephone equipment capable of transmitting and receiving on

156.65 MHz (Channel 13). Multi-channel equipment will also require 156.8 MHz (Channel 16). Dredge tugs and tenders will be considered towing vessels within the meaning of the Act.

2.2 TURBIDITY BARRIERS

2.2.1 General

The Contractor shall not commence placement of dredged materials at Placement Area No. 123 until after installation of a turbidity barrier at the location(s) shown. The turbidity barriers shall be to the limits shown. The installed turbidity barrier shall be maintained until completion of dredging operations in the affected Placement Area.

The installed turbidity barrier shall not be removed until placement operations at the affected Placement Area has been completed. Erected turbidity barrier shall be inspected daily and rips or tears that occur in the turbidity barrier material during use shall be repaired or replaced immediately by the Contractor at its expense. Rips or tears in the turbidity barrier material that are not repaired or replaced immediately by the Contractor will result in suspension of dredging operations in the affected Placement Area. Required repairs or replacements will be a pre-requisite for resumption of dredging. The Contractor shall adequately mark the barrier and place signs along the barrier to identify it as an obstruction to navigation. The barrier and signs shall have lights installed as necessary to be visible during dark hours.

2.2.2 Turbidity Barrier Fabric

The barrier fabric shall be flexible and of sufficiently fine mesh to prevent passage of suspended material through the fabric. The barrier fabric material shall have a width of not less than 60 inches with a weight of not less than 22 ounces per square yard and tensile strength of not less than 500 pounds per inch. A 12-inch square sample of barrier fabric shall be submitted for approval.

2.2.3 Floats

The turbidity barrier shall be buoyed with floats of sufficient buoyancy

SECTION 35 20 23.16 45 Page 8 to prevent the top of barriers from submerging under all stages of tide and wind conditions. If the top of the barrier becomes submerged, dredging will be suspended until the condition is corrected.

2.2.4 Anchors and Weights

The Contractor shall provide and maintain an anchor system to secure the turbidity barrier in position. The barrier shall have weights attached as necessary to keep the fabric within an angle to the vertical of 30 degrees or less. The fabric shall not be attached to the existing bottom and will be allowed to rest freely on the bottom.

2.2.5 Installation Advisor

A manufacturer's representative, experienced in turbidity barrier installation, shall assist and instruct Contractor personnel in the initial installation of a complete turbidity barrier unit.

PART 3 EXECUTION

3.1 ESTIMATED QUANTITY OF MATERIAL

Within the limits of available funds, the Contractor will be required to excavate the entire quantity of material necessary to complete the work specified whether the quantities involved are greater or less than those estimated. The work is to be done in accordance with this Contract and at the Contract price or prices, subject to the provisions of the SECTION 01 10 00.01 45 NON-REGULATED SPECIAL CONTRACT REQUIREMENTS, Paragraph entitled VARIATIONS IN ESTIMATED QUANTITIES - DREDGING.

3.1.1 Quantity Summary

The quantities listed in Appendix 1 - QUANTITY SUMMARY TABLE include the volumes present at the time of the surveys indicated on the Contract drawings, plus anticipated shoaling before dredging begins. For the purpose of acceptance, the pipeline dredging work in the Bid Item(s) of the Bidding Schedule are divided into Sections.

3.1.2 Required Dredging Prism

The total estimated amount of material to be removed from within the specified limits, including side and end slopes and including anticipated shoaling occurring prior to the dates of the "before-dredging" surveys but excluding overdepths, in cubic yards is listed in Appendix 1 - QUANTITY

SUMMARY TABLE.

3.1.3 Allowable Overdepth

To cover unavoidable inaccuracies of the dredging process, material actually removed from the designated areas to be dredged, will be measured and paid for at full Contract price. The portion of the dredging template shown as allowable overdepth is optional and clearance of this area is not required for successful contract completion. The maximum amount of allowable overdepth dredging is estimated, including anticipated shoaling occurring prior to the dates of the "before-dredging" surveys, in cubic yards and is listed in Appendix 1 - QUANTITY SUMMARY TABLE.

SECTION 35 20 23.16 45 Page 9

3.1.4 Side And End Slopes

Dredging of the side and end slopes shall follow, as closely as practicable, the lines indicated or specified. Material actually removed from within the limits as approved, to provide for final side and end slopes as specified, but not in excess of the amounts originally above the limiting side and end slopes will be estimated and paid for, whether dredged in original position or by dredging the space below the pay slope plane at the bottom of the slope for upslope material capable of falling into the cut. In computing the limiting amount of side and end slope dredging, net dimensions, without allowance for overdepth, will be used.

3.1.5 Excessive Dredging

Material taken from beyond the limits specified will be deducted from the total amount dredged as excessive overdepth dredging or excessive side or end slope 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 provisions of the SECTION 01 10 00.01 45 NON-REGULATED SPECIAL CONTRACT REQUIREMENTS, Paragraph FINAL EXAMINATION AND ACCEPTANCE or Paragraph SHOALING.

3.2 AREAS TO BE DREDGED

Based on information currently available to the Government, areas known to require dredging are shown.

3.3 CONDUCT OF DREDGING WORK

3.3.1 Protection of Existing Waterways

Conduct dredging operations using a method that will ensure that material or other debris are not pushed outside of the dredging limits or otherwise deposited in existing side channels, basins, docking areas, or other areas being used by vessels. The Contractor will be required to change its method of operations as may be required to comply with the above requirements. If bottom material or other debris is pushed into areas noted above, as a result of the Contractor's operations, the same shall be promptly removed by and at the expense of the Contractor to the satisfaction of the Contracting Officer.

3.3.2 Adjacent Property and Structures

No dredging will be permitted within 25 feet of a structure. Damage to private or public property or structures resulting from the disposal or dredging operations shall be repaired promptly by and at the Contractor's expense. Damage to structures as a result of Contractor's negligence will result in suspension of dredging and require prompt repair at the Contractor's expense as a prerequisite to the resumption of dredging.

Where dredging to obtain the required dimensions might endanger a structure, the Contracting Officer, upon request, may reduce the required excavation in the vicinity of this structure.

3.4 PLACEMENT OF EXCAVATED MATERIAL

3.4.1 General

Material excavated shall be transported to and deposited in the Placement Area designated. Inspect the Placement Area to ensure that using the Area

SECTION 35 20 23.16 45 Page 10 for placement operations will not place it in violation of the applicable Federal, State, or local statutes concerning fish and wildlife. Particular statutes which the Contractor shall consider include, but are not limited to, the Federal Migratory Bird Treaty Act and the Endangered Species Act of 1973.

3.4.2 Placement Areas

3.4.2.1 Open Water or Partially Emergent Unconfined Placement Area No. 123

Placement operations shall not commence before turbidity barriers are erected to the limits and at the locations shown. Installation, requirements and maintenance of turbidity barriers shall conform to details in the Paragraph: TURBIDITY BARRIERS, above. Material shall be deposited within the Placement Corridor shown. The limiting lines of discharge denoting the Placement Corridor shall be prominently marked by the Contractor with conspicuous buoys or stakes at each corner. No material shall be placed outside of these limiting lines of discharge which define the Placement Corridor. Material deposited beyond these limiting lines of discharge shall be removed by the Contractor at no additional cost to the Government. The discharge end of the pipe shall be held at or near the bottom during placement operations to confine the material within the designated Area. A spreader shall be used at the submerged end of the discharge pipe to distribute the material evenly and reduce scouring.

Discharge in these Placement Areas shall be made over and beyond the crest of existing mounds of previous deposits. When the height of a deposit along the back or end limiting lines of discharge reaches an elevation of 2 feet above North American Vertical Datum of 1988 (NAVD88), the point of discharge shall be relocated within the Placement Areas as many times as necessary to permit uniform build-up of the Area to an elevation 2 feet above NAVD88. Then the Contractor may either construct containment levees with spillways around the perimeter of the Area as shown or it may move its point of discharge to another authorized Placement Area.

3.4.2.2 Open Water or Partially Emergent Unconfined Placement Area No. 125

The limiting lines of discharge denoting the Placement Area shall be prominently marked by the Contractor with conspicuous buoys or stakes at each corner. No material shall be placed outside of these limiting lines of discharge which define the Placement Area. Material deposited beyond these limiting lines of discharge shall be removed by the Contractor at no additional cost to the Government. The discharge end of the pipe shall be held at or near the bottom during placement operations to confine the material within the designated Placement Area. A spreader shall be used at the submerged end of the discharge pipe to distribute the material evenly and reduce scouring. Discharge in the Placement Area shall be made over and beyond the crest of the existing mounds of previous deposits. When the height of a deposit along the back or end limiting lines of discharge reaches an elevation of 2 feet above NAVD88, the point of discharge shall be relocated within the Placement Area as many times as necessary to permit uniform buildup of the Area to an elevation 2 feet above NAVD88. Then the Contractor may either construct containment levees with spillways around the perimeter of the Area as shown or it may move its point of discharge to another authorized Placement Area.

3.4.2.3 Beneficial Use Site A (BUS A)

The goal of dredge material placement in BUS A is to encourage the creation of marsh habitat through the provision of variable topography. Material

SECTION 35 20 23.16 45 Page 11 placed under this contract will be shaped by natural and manmade forces under future endeavors. The available discharge points shall be prominently marked by the Contractor with conspicuous buoys or stakes. The Contractor shall place the dredged material at the discharge points in a manner that protects the existing material and marsh vegetation from erosion and scouring, and that promotes rapid settlement of suspended sediments. A total of seventy-two (72) discharge points are available as shown, but not all of the discharge points may be used for this contract. If, during placement, discharge points are too close together to promote water circulation between finished mounds, the Contractor shall only use every other discharge point in an alternating fashion. In the event that the total dredged material from Section Nos. 1-3, in Schedule No. 1, and Nos.

11-13, in Option No. 1 (if awarded), cannot be placed into BUS A due to lack of placement area capacity, the remaining material shall be placed into Placement Area No. 123.

3.4.2.4 Beneficial Use Site B (BUS B)

The goal of dredge material placement in BUS B is to encourage the creation of marsh habitat through the provision of variable topography. Material placed under this contract will be shaped by natural and manmade forces under future endeavors. The available discharge points shall be prominently marked by the Contractor with conspicuous buoys or stakes. The Contractor shall place the dredged material at the discharge points in a manner that protects the existing material and marsh vegetation from erosion and scouring, and that promotes rapid settlement of suspended sediments. A total of one hundred twenty (120) discharge points are available as shown, but not all of the discharge points may be used for this contract. If, during placement, discharge points are too close together to promote water circulation between finished mounds, the Contractor shall only use every other discharge point in an alternating fashion. In the event that the total dredged material from Section Nos. 9-10, in Schedule No. 1, and Nos.

14-15, in Option No. 2 (if awarded), cannot be placed into BUS B due to lack of placement area capacity, the remaining material shall be placed into Placement Area No. 125.

3.4.2.5 Sidecast Retaining Berms

If Option No. 5 is exercised, the Contractor shall establish sidecast retaining berms as shown. In all cases, the retaining berms shall be constructed to template(s) shown to minimize transport of dredge material out of BUSs. Borrow material for berm construction shall be excavated from inside the identified cells and a minimum of 100 feet from the identified berm locations and from any existing vegetated and/or emergent areas within the BUS. The Contractor shall excavate to depths necessary for obtaining suitable borrow material. There are a number of planned water circulation openings along the identified retaining berms, as shown. All delineated existing marsh areas shall be avoided during construction.

3.4.2.6 Matagorda Ship Channel (MSC) Placement Area No. 3 (Sundown Island)

The Contractor shall notify the Corpus Christi Resident Office 10 days in advance of commencement of work at MSC Placement Area No. 3 to schedule an on-site meeting to discuss layout of pipelines, sequence of material placement, and control of discharge. The Contractor shall also contact Ms.

Iliana Pena, Audubon Society, at 210-913-9798 to coordinate MSC Placement Area No. 3 construction activities.

(1) Equipment, Pipeline, and Personnel. In addition to the required

SECTION 35 20 23.16 45 Page 12 equipment and personnel for dredge pipeline operations, the Contractor shall arrange for the following:

(i) Two (2) Contractor personnel to be on-site full time;

(ii) Appropriate equipment to meet the requirements of these specifications for placing material on Sundown Island (PA 3);and

(iii) The Contractor shall install two (2) operating Wye valves with cutoffs along the pipeline, as directed to accomplish the placement of material at the locations specified.

(2) Pipe Layout and Access Restrictions. The Contractor shall present at the on-site meeting the methods that will be utilized for accomplishing the specified placement requirements, including pipe layout and Wye valve locations and procedures for Wye valve operation and drainage of effluent from the site. One (1) Wye valve shall be located whereby it can be used to direct discharges of soft fines and water during pipeline washing to an approved location within the discharge corridor to minimize wash loss of previously placed sand. The second Wye valve shall be located along the sand placement line, where it can be used to shunt sand from one (1) discharge location to another as required to accomplish the specified placement results. No personnel or equipment will be allowed on the existing island or beyond the existing line of geotextile tubes, except for an area defined and staked during the on-site meeting.

(3) Discharge Locations and Sequence. The Contractor shall discharge dredged material in the general location shown in the contract drawings.

Specific discharge plans will be finalized at the on-site meeting. Control of Discharge. The Contractor shall utilize the Wye valve to direct sand to the discharge locations specified and to direct fines and pipe wash water to the approved discharge locations. The Contractor shall use a spreader or pocket pipe at the ends of the sand discharge pipes to reduce sand wash.

3.4.2.7 (AM#2)Placement Area No. 117A (Beach Nourishment)

3.4.2.7.1 Dredge-size Restrictions and Limitations

The Contractor shall not be permitted to use dredges larger than 20 inches in diameter on any part of the work. This 20-inch maximum shall be measured at the pump discharge flange, certified by the pump manufacturer, and with no modifications made to the pump. If the Contractor uses a dredge larger than 20 inches, a WYE will be required for all discharge operations in this Placement Area. Each leg of the WYE shall be the same diameter as the main discharge pipe. This discharge point of each leg of the WYE shall be fitted with a baffle or energy dissipater to promote settling of solids, unless otherwise directed. Both legs of the WYE shall be completely unrestricted, and shall continuously carry 50 percent of the flow. Additionally, the discharge point of a single pipe, for all dredges, will be fitted with a baffle or energy dissipater, unless otherwise directed. The dredge limitations and placement requirements are for preventing erosion of the beach or breaching of the adjacent bulkhead while promoting settling of dredged material.

3.4.2.7.2 Beach Placement Activities

The Contractor shall advance and relocate discharge end(s) of the discharge pipe as often as necessary, or as directed, to prevent erosion or overloading of beach areas. The Contractor shall take the necessary precautions to avoid mounding the deposited material higher than the adjacent bulkhead. Mounds or areas that are over built shall be graded to

SECTION 35 20 23.16 45 Page 13 the required finish template before acceptance. The material to be dredged from Section No. 17 shall be transported and deposited into Placement Area No. 117A to the lines, grades and the typical cross-section shown. No construction equipment, pipe or personnel will be allowed within the limits of adjacent wetlands to the South and East of the Placement Area. The discharge limits shall be prominently marked by the Contractor with conspicuous buoys or stakes at each corner. The existing concrete bulkhead shall be marked at each corner of the Placement Area with stakes and flagging adjacent to the structure. Material shall be deposited and shaped to the limits and grades shown to re-nourish the existing recreational beach. Clay balls deposited shall be removed by he Contractor and disposed off-site using an approved method. No material shall be discharged outside of the corridor without approval. Material discharged outside of the corridor without approval will be removed at the Contractor's expense.

The discharge into Placement Area 117A shall be deposited along two (2) lines of discharge. The first line shall be approximately 50 feet from the bulkhead and parallel to it, terminating 50 feet from the northern edge of the Placement Area boundary. The second line shall be approximately 150 feet from the bulkhead and parallel to it, terminating 50 feet from the constructed pier. Unless otherwise directed, the Contractor shall begin discharge on the north side of the groin structure, approximately 50 feet from the bulkhead and proceed to place material as specified, along the first discharge line. Upon completing placement along the first line for the entire length of the Placement Area, the Contractor shall then move the discharge pipe to the north side of the groin structure, along the second line, and proceed with placement toward the north, as specified. In placing material along the second line, the Contractor shall ensure that discharge is sufficient to construct the full beach cross section, up to 100 feet from the constructed pier. The final 50 feet of the second line of discharge should taper back to the material deposited by the first line of discharge. This is to limit the amount of material deposited underneath the pier.

The Contractor shall take the action necessary, including using WYE connections and multiple discharge pipes, to construct the full template during the second pass. If necessary, a third line may be located approximately 200 feet from the bulkhead and parallel to it, terminating 100 feet from the constructed pier. The Contractor shall use a spreader or pocket pipe at the ends of the discharge pipe as necessary to retain the fill. The Contractor shall advance the discharge points along the lines of discharge as often as necessary so that the top of the finished mounded material will be no higher than 1-foot below the top of the bulkhead.

After an initial quantity of fill becomes emergent and as the work progresses, temporary dikes or mounds shall be constructed as necessary to aid in retaining additional fill. Upon completion of all filling operations, the fill shall be graded and dressed so as to eliminate un-drained pockets, abrupt humps and depressions. The Contractor shall make every effort to spread the material to a uniform elevation. A tolerance of 0.5 of 1-foot above the prescribed berm grade and slopes, above the wave zone, will be permitted in the finished surface. The bank caused by wave forces shall be graded down to a slope not steeper than 1 Vertical to 20 Horizontal. Construction references including stakes and flagging shall be removed after filling operations are complete.

3.4.2.7.3 Protection of Existing Structures

Existing signs, buoys or other structures within the work lines shall be

SECTION 35 20 23.16 45 Page 14 protected or removed and later replaced by the Contractor as directed. The Contractor shall exclude the public from the work areas in the immediate vicinity of the dredging, transporting and placement operations. The Contractor shall prevent public access to the discharge ends of the pipeline. The Contractor shall erect, maintain and relocate as often as necessary, a restrictive barrier around the discharge of the hydraulic pipeline. The Contractor shall post conspicuous signs stating "DANGER HIGH PRESSURE DISCHARGE - STAY CLEAR". The Contractor shall have a safety person on site until beach nourishment activity is completed. The safety person shall maintain radio communications between the dredge and the beach filling operations continuously. Enforcement shall be the Contractor's responsibility, shall be coordinated with the local enforcement agencies, and will be subject to approval.

(1) Beach Surveys. The existing concrete bulkhead shall be utilized as the beach baseline. The Contractor shall take crosssections at 100 foot intervals as a minimum, before and after completion, for acceptance. A copy of the surveys shall be submitted promptly.

(2) Care of Existing Structures. The Contractor shall adequately protect groins or jetties as necessary to prevent damage by the Contractor's pipelines. The Contractor shall exercise caution while working in the vicinity of the existing wooden pier. Fill operations shall be performed using a method that will evenly distribute any material deposited under the pier without causing damage. Advanced pipe shall be carefully laid under the pier to reach the beach fill area located on the north end of the beach. The Contractor shall be responsible for damage caused to the existing pier and to other structures existing in this area.

3.5 PRESERVATION OF PUBLIC AND PRIVATE PROPERTY

3.5.1 Damages

Fences, roads, ditches, private or public grounds, and other structures or improvements damaged as a result of the Contractor's operations herein specified shall be repaired or rebuilt by and at the Contractor's expense.

The areas used by the Contractor in laying and maintaining pipelines shall be restored to the same or as good a condition as existed prior to commencement of the work. Upon completion of the work, the ends of culverts shall be fully closed with wooden bulkheads and trenches and bank cuts shall be backfilled to original ground level.

3.5.2 Accountability and Restoration

Preserve and protect the existing informational and directional signs, camp facilities, water wells and tanks, station markers, mile markers, and mooring piles which have been established along either bank of the Waterway within the reaches of the dredging operations covered herein. The Contractor shall be accountable for and will be required to replace or restore at its expense the signs, camp facilities, water wells and tanks, markers, and mooring piles damaged or destroyed as a result of dredging operations herein specified.

3.6 ALTERNATE PLACEMENT AREA(S) PROPOSED BY CONTRACTOR WITH BID AFTER AWARD

OF CONTRACT

If, after award of this Contract, placement area(s) other than those specified herein are proposed, their acceptance will be subject to

SECTION 35 20 23.16 45 Page 15 approval. Furnish written permission from the owners for the use of the substitute placement area(s) and written permission from the owners of the properties involved in obtaining access to the substitute placement area(s). The Contractor shall coordinate the use of the substitute placement area(s) with Federal and State Natural Resource Agencies and shall submit, with its proposal, documentation that demonstrates compliance with the applicable laws and regulations pertinent to designation and coordination of dredged material placement area(s). The Galveston District shall be consulted for specific requirements. Expenses incurred in connection with providing and making available another placement area(s) shall be borne by the Contractor. Materials deposited thereon and operations in connection therewith shall be at the Contractor's risk.

3.6.1 Data Submittal

The award of the modification will be subject to the approval of the proposed Contractor-furnished Placement Area(s) and unless the foregoing required data are furnished with the Contractor's request, the modification for the use of the proposed substitute Placement Area(s) will not be considered.

3.7 METHOD OF PLACEMENT

Deposit dredged material by the hydraulic process. Pipeline for hydraulic dredging shall discharge into the Placement Area as shown or indicated.

3.7.1 Pipeline Route

The dredge pipeline route to the Placement Area shall follow closely the location shown or approved.

3.8 DISPOSAL IN PLACEMENT AREA

Dredged material shall be placed to the lines and grades shown and as specified. The order of work for construction is as specified in the paragraph entitled, ORDER OF WORK, above.

3.8.1 Utilities within the Placement Area

Every effort has been made to give pertinent details of the location of utilities, pipelines, and other facilities which may be encountered in trenching or jacking operations. The Contractor shall investigate existing conditions and shall be satisfied that no additional construction which may interfere with dredge pipeline laying specified herein exists.

3.8.2 Unauthorized Placement of Material

Excavated material that is deposited elsewhere than in places designated or approved will not be paid for and the Contractor may be required to remove the misplaced excavated material and deposit it where directed at Contractor's expense.

3.8.3 Debris Disposal

During the progress of the work, the Contractor shall not deposit worn out discharge pipe, wire rope, scrap metal, timbers, or other rubbish or obstructive material in the Placement Area, or along the banks of the navigable waters, except as specified herein. This material, together with scrap rope, wire cable, piles, pipe, or other obstructive material which

SECTION 35 20 23.16 45 Page 16 may be encountered during the dredging operations, shall be disposed by the Contractor at approved locations.

3.9 DREDGE PIPELINES

Plainly mark the pipeline access routes with conspicuous stakes, targets and buoys which shall be maintained throughout this Contract period. The pipeline shall be inspected at least twice daily for leaks; inspector's name and observations shall be recorded on daily reports. Reference the SECTION 01 35 26.01 45 GOVERNMENTAL SAFETY REQUIREMENTS for additional dredge pipeline safety requirements.

3.9.1 Submerged Pipeline

If the Contractor elects to use a submerged section in the dredge discharge pipeline for crossing a navigable channel it may do so without the formality of obtaining a Department of the Army permit for work or structures in navigable waters. The Contractor shall discuss the submerged section of dredge pipeline during the pre-operations safety meeting.

Coordinate the submerged pipeline crossing(s) with the U.S. Coast Guard Marine Safety Office (MSO), U.S. Coast Guard Vessel Traffic Service (VTS), and the Gulf Intracoastal Canal Association (GICA). At least 5 days shall be allowed for comments and their comments shall be coordinated with the Contracting Officer. Concerns regarding impact to navigation will be considered and final resolution will be made by the Contractor, Contracting Officer, MSO, VTS, and GICA. Detailed plans of the submerged pipeline section shall be submitted and approved prior to use of the submerged pipeline section. The plans shall indicate clearly the width and depth of the navigation opening and the method used to mark it by day and by night for the safety of navigation. The minimum bottom width of the submerged section shall not be less than 200-feet wide for channels whose authorized width is greater than 200 feet. The minimum bottom width of the submerged section for channels whose authorized width is less than 200 feet shall be the width of the authorized Federal Channel. The highest point on the pipe or ball connection occurring across the bottom width of a submerged section shall not be higher than the required depth of the channel. Submerged pipelines shall also be in accordance with SECTION 01 35 26.01 45

GOVERNMENTAL SAFETY REQUIREMENTS.

3.9.2 Submerged Pipeline Lighting Requirements

Lighted buoys, meeting…