J.1._PMV_50_Dredging_Specifications.pdf

SPECIFICATIONS

FOR

DREDGE BOAT BASIN AND ACCESS CHANNEL

AT

U. S. COAST GUARD STATION

BRUNSWICK, GEORGIA

PROJECT NO. 8759909

October 2017

COMMANDING OFFICER, CIVIL ENGINEERING UNIT MIAMI

15608 S.W. 117TH AVENUE

MIAMI, FLORIDA

33177

TABLE OF CONTENTS

TITLE PAGES

DIVISION 1 – GENERAL REQUIREMENTS

Section 01 11 00 – General Paragraphs 01 11 00 -1 thru 01 11 00 -4 Section 01 32 00 – Progress Schedule 01 32 00 -1 thru 01 32 00 -3 Section 01 33 00 – Submittals 01 33 00 -1 thru 01 33 00 -2

DIVISION 2 THRU 34 – NOT USED

DIVISION 35 – WATERWAYS AND MARINE

Section 35 20 23 – Dredging 35 20 23-1 thru 35 20 23-6

DIVISION 36 THRU 44 – NOT USED

APPENDIX A – Vicinity Map

DIVISION 1 GENERAL REQUIREMENTS

01 11 00-1

SECTION 01 11 00

GENERAL REQUIREMENTS

1 GENERAL

1.1 GENERAL DESCRIPTION

The Contractor shall furnish all labor, tools, equipment and material to dredge and dispose of sediment from the small boat basin and access channel at Station Brunswick, Georgia

1.2 BASIS FOR BIDS

1.2.1 Base Bid

Conduct a pre- and post-dredge hydrographic survey of the area around the pier. Mobilize and demobilize personnel and equipment including the dredge, hydraulic pipeline, and other equipment necessary to complete the work. Coordinate use of the Sediment Placement Facility on Andrews Island with the facility owner, U.S. Army Corps of Engineers. Include all direct costs not associated with the dredging operation.

1.2.2 Unit Price Item

Dredge Plantation Creek by hydraulic means to the indicated design depth of Elevation (-)10.0’ MLLW. Due to the variable control of dredging operations an overdepth of one foot below the design depth shall be allowed. The removal, transport and disposal of dredged material shall be paid for at the established unit price per cubic yard. Transport the dredge sediment by submerged hydraulic pipeline to the sediment placement facility. Contractor shall enter into an agreement with the U.S. Army Corps of Engineers and pay all expenses to use the facility. This disposal cost shall be included per cubic yard unit price. Payment for dredging including disposal fees shall not be made for dredging deeper than the allowable overdepth, dredging outside of authorized areas, or dredging of material disposed of in an unauthorized manner. The estimated unit price dredge quantity is 3,880 CY. This is based upon the volume to dredge to the design depth plus the volume to dredge to the allowable overdepth as indicated by the hydrographic survey by USACOE on September 20-21, 2016.

1.3 LOCATION

The dredging work shall be located in the boat basin and access channel of Coast Guard Station Brunswick, Georgia

1.4 INSPECTION PRIOR TO BID

Prospective bidders are encouraged to visit the site to familiarize themselves with the existing conditions.

Since the site is secured, prior arrangements for site visits should be made by contacting:

Commanding Officer Station Brunswick 2 Conservation Way Brunswick, GA 31520

Attn: Engineering Petty Officer

01 11 00-2

Tel: (912) 267-7999

1.5 DRAWING ACCOMPANYING SPECIFICATION:

Drawings to be used in conjunction with these specifications are listed below. The drawings are the property of the Government and shall not be used for any purpose other than that contemplated by the specification.

USCG Drawing M2219-D in 6 sheets.

1.6 PROJECT PERFORMANCE TIME

After work begins at the site, the Contractor shall work continuously during normal working hours and show daily progress until all work is complete. The total contract performance period shall be 90 calendar days, which includes the time needed to approve all material submittals, and construction of the dewatering facility.

1.7 PERMITS

Dredging of the boat basin and access channel, and placement of the dredge spoils shall be accomplished under the authority and in accordance with the conditions of U. S. Army Corps of Engineers Nationwide Permit No. 35.

1.8 SAFETY PROGRAM

1.8.1 General

The Contractor is wholly responsible for work site safety. The Contractor shall implement a safety program that protects the lives and health of personnel in the construction area, prevents damage to property and avoids work interruptions. The Contractor shall provide appropriate safety measures including but not limited to barricades, signs and signal lights as well as complying with the requirements of all applicable Federal, State and Local safety laws, rules and regulations.

1.8.2 Compliance

The Contractor is specifically required to comply with the requirements of the U. S. Army Corps of Engineers "Safety and Health Requirements Manual" (EM 385-1-1, latest version available) and the “Accident Prevention” clause (FAR 52.236-13). Once accepted, this safety plan shall become part of the contract requirements. Note: This review/acceptance does not in any way relinquish the Contractor from responsibility for work site safety nor the obligation to comply with the OSHA regulations found in 29 CFR 1910 & 1926 or any other State or Local safety law, rule or regulation applicable to the contract work. The Coast Guard will cooperate fully with the Department of Labor (Occupational Safety and Health Administration) in their enforcement of OSHA regulations.

1.8.3 Safety Plan

The Contractor shall submit a written safety plan. At a minimum, this plan shall describe the Contractor's general safety program and identify specific safety provisions for hazards incidental to the contract work such as elevated working surfaces, working over water, working from floating work platforms, overhead crane operations or similar conditions of the work.

1.8.4 Material Safety Data Sheets and Material Handling Procedures

01 11 00-3

1.8.4.1 Data Sheets

Submit a Material Safety Data Sheet (MSDS) for all materials containing hazardous substances required for contract execution. Information provided in MSDS’s shall meet the requirements of 29 CFR 1910.1200. MSDS’s require Contracting Officer review and acceptance prior to bringing these materials on site.

1.8.4.2 Material Storage

Limit the quantity of these materials stored on site to the amount needed for execution of work.

Storage of excess materials will not be permitted. Assure that the storage of these materials comply with all applicable federal, state, and local laws and regulations and provide additional storage facilities (paint lockers, etc.) as required for the storage of such materials. Coordinate the physical location of storage areas with the On-site Representative prior to bringing these materials on site.

1.8.4.3 Protective Measures

The Contractor shall take all protective measures outlined on the MSDS’s and as required by federal, state and local regulations to protect all personnel in the vicinity of the work area from exposure to these materials. The Contractor shall include any required protective measures in the Safety Plan.

The Contracting Officer's Representative shall review protective measures prior to allowing use of these materials.

1.8.4.4 Disposal of Excess Material

The Contractor shall dispose of all excess hazardous materials as required by the MSDS and all applicable federal, state, local laws and regulations.

1.9 AVAILABILITY OF UTILITY SERVICES

No commercial utilities are available. The Contractor shall pay all costs incurred in connecting, converting, and transferring the utilities to the work. Temporary toilet facilities, in accordance with applicable codes and health ordinances, shall be provided and maintained by the Contractor for the use of Contractor’s personnel.

1.10 WORK COORDINATION

The Contractor shall closely coordinate all work with the Contracting Officer's Representative (COR) in order to reduce to a minimum disturbances to personnel and operations. The Contractor and COR shall contact prior to start of any work and coordinate use and access to Andrews Island Sediment Placement Facility with:

U.S. Army Corps of Engineers. Attn: Burton C. Moore, Chief Dredging Section Savannah District E-mail: Burton.C.Moore@usace.army.mil Operations Division Tel: (912) 652-6086 100 West Oglethorpe Avenue Cell: (912) 656-9500 Savannah, GA 31402

1.11 CONTRACTOR USE OF PREMISES

The Contractor will be working on a military installation. Become familiar with and obey fire, traffic, and security regulations. Personnel shall not stray from the immediate area of work nor direct avenues of ingress and egress unless authorized in advance by the COR. Contractor shall coordinate dredging operations with CG Station Brunswick command to minimize disruption to Coast Guard operations and movement of CG boats throughout the basin and access channel.

mailto:Burton.C.Moore@usace.army.mil

01 11 00-4

1.12 STORAGE AREA

The Contractor will be provided a storage area in a location determined by the COR. The Contractor shall be responsible for restoring the area to its original condition at the completion of the work.

1.13 CLEANUP

The Contractor shall keep the work area, including storage area, free from accumulations of waste materials on a daily basis and comply with all federal, state and local regulations pertaining to the storage, transport and disposal of wastes. The Contractor shall not use Coast Guard waste disposal facilities including garbage cans, trash piles or dumpsters. The Contractor shall remove all debris at the disposal site which accumulated during his work.

1.14 RESTORATION

The Contractor shall be responsible for repair of any damage incurred to buildings, pavement, or turf areas as a result of his activities.

1.15 STORM PROTECTION

Should warnings of winds of gale force or stronger be issued, the Contractor shall take every practicable precaution to minimize danger to person, the work, and to adjacent property. Precautions shall include, but not be limited to, closing all openings, removing all loose materials, tools and equipment from exposed locations, anchoring and tying down barge, and removing or securing scaffolding and other temporary work.

1.16 RECEIPT OF MATERIALS

Shipment of equipment, materials, and supplies shall be addressed to the Contractor - not the Government. The Contractor must be on hand to accept shipments; the Government will not accept shipments.

1.17 SECURITY

1.17.1 PERSONNEL

The Contractor shall provide the COR with a list of names of all personnel who will be working on the site 72 hours in advance. The Contractor shall submit a revised list at any time during the project at least 24 hours before new personnel arrive. Only personnel on the approved listing will be allowed on the secured site.

1.17.2 IDENTIFICATION

All personnel shall carry proper identification (ID) when on site. Proper ID shall be any government issued ID. The identification must be laminated, and show a facial picture of the individual. Individuals without proper ID will be escorted off the Coast Guard premises.

1.18 FINAL INSPECTION AND ACCEPTANCE

When the work is complete and ready for final inspection, submit a written request for final inspection to the Contracting Officer at least 10 working days in advance of the date of final inspection. Final inspection will not be scheduled until all submittals have been approved.

--End of Section 01 11 00--

01 32 00-1

SECTION 01 32 00

PROGRESS SCHEDULE

Prepare a horizontal bar graph progress schedule using a time scale. The project should be divided and subdivided into a sufficient number of work activities that can accurately graphically display the work sequence, activity duration, interplay of activities, and dollar value of each activity.

1.1 RESPONSIBILITY

The Contractor is responsible for executing the work within the time stated in the contract.

1.2 SUBMITTALS

1.2.1 Final Progress Schedule

Submit final progress schedule no later than 5 calendar days after receiving the Notice To Proceed (NTP). A draft schedule is to be submitted before the preconstruction conference with time periods shown but without dates of NTP and completion shown. Once a NTP date has been established, the dates are to be filled in. By having the draft schedule at the preconstruction conference, the Contracting Officer and Contractor can discuss any apparent inconsistencies or omissions, and approval can be expedited.

1.2.2 Updated Progress Schedule

Submit updated progress schedule every month along with the request for payment.

2 PRODUCTS

2.1 PROGRESS SCHEDULE

Progress schedule shall have project name, location, contract number, and company name. The final progress schedule, with the NTP and completion dates filled in, shall be signed.

2.1.1 At the left side of the form, list in columns.

a. Activity Number and Description - At a minimum, break down the project into 10 activities. If enough detail is given on the progress schedule, then the activity breakdown may be done at the Contracting Officer's discretion. Activities can be of various origins (i.e. by specification section, by logical sequence of work, by breakdown used for bid estimates, etc.)

b. Specification Section Reference - This is optional. Use only if the breakdown of activities directly correlates with the specification sections.

c. The Activities Percentage (i.e. 50%) or Weight (i.e..5) of the entire contract based on Dollar Value -the cumulative percentage should add up to 100 percent.

d. Estimated Value of the Activity - Profit and overhead should be distributed throughout activities or listed as a separate line item and distributed over the entire length of the project. The total values should add to the contract amount.

2.1.2 Top of Form

01 32 00-2

Establish the time schedule across the top of the sheet for the entire project duration. Divide the project into months, weeks, or days depending on the length of the project and an appropriate time scale.

2.1.3 General

Lay out a bar graph opposite each activity, corresponding to the schedule start date and extended for the scheduled duration of the activity. Indicate the percentage of the activity which you intend to complete each week above or below each bar.

3 EXECUTION

3.1 UPDATING SCHEDULE

Update and submit progress schedule every month with progress payment showing actual progress.

Updated progress schedules shall include the original information and an updated actual progress curve using a broken line.

3.2 DELAYS

If the Contractor knows or has reason to believe that the delivery of any material or equipment, the shortage of qualified labor, delays caused by others, or the occurrence of any other difficulty may cause delay in executing the work as scheduled. He shall notify the Contracting Officer, in writing, within 3 calendar days.

3.3 SAMPLE CHART

A sample progress chart is shown on the following page. This should only be used as a guide. It displays the "type" of information which should be included in the submitted progress schedules.

END OF SECTION 01 32 00

01 32 00-3

01 33 00 - 1

SECTION 01 33 00

SUBMITTALS

PART 1 - GENERAL

1.1 SUBMITTALS REQUIRED

Items to be submitted are specified in each applicable Section of this specification. Submittals shall be approved before procurement, fabrication, or delivery of items to the job site. Partial submittals will not be acceptable and will be returned without review. Submittals shall include the size, layout dimensions, capacity, project specification and paragraph reference, applicable Federal, Military, industry and technical society publication references, and other information necessary to establish contract compliance of each item the Contractor proposes to furnish. The contractor shall indicate in the submittal which item(s) they are submitting.

1.2 TIMING OF SUBMITTALS

Submittals will be reviewed by the Contracting Officer and returned to the Contractor within 10 working days after receipt by the Contracting Officer.

1.3 DEFINITION

Contractor shall review individual sections for special submittal requirements and applicable publications relating to submittals, typical submittal types, and numbers of each required, are as follows:

1.3.1 Dredging Plan (1 electronic copy)

As required under specific section.

1.3.2 Hydrographic Survey (1 electronic copy)

Drawings shall show sizes, elevations, sectional views, details of structures in the vicinity of the proposed location, layout and arrangement of items of equipment, piping, and other items that must be shown to ensure a coordinated survey. Drawings shall also indicate adequate clearance for operation, and maintenance operating equipment devices. If any survey is disapproved, the drawings shall be revised to show an acceptable survey and be resubmitted.

1.3.3 Certified Test Reports (1 electronic copy)

Before delivery of equipment, certified copies of all test reports specified in the individual sections shall be submitted for approval.

1.3.4 Certificates of Conformance (1 electronic copy)

Submit certification from the manufacturer attesting that equipment to be furnished for this project conform to the requirements of this specification and of the referenced publications. Pre-printed certifications will not be acceptable; certifications shall be in the original. The certification shall not contain statements that could be interpreted to imply that the product does not meet all requirements specified, such as "as good as"; "achieve the same end use and results as materials formulated in accordance with the referenced publications"; "equal or exceed the service and performance of the specified materials". The certification shall simply state that the product conforms to the requirements specified.

1.3.5 Standards Compliance (1 electronic copy)

When equipment must conform to the standards of organizations such as the American National Standards Institute (ANSI), American Society for Testing and Materials (ASTM), and Underwriters

01 33 00 - 2

Laboratories (UL), proof of such conformance shall be submitted to the Contracting Officer for approval. If an organization uses a label or listing to indicate compliance with a particular standard, the label or listing, the Contractor shall submit a certificate from an independent testing organization, which is competent to perform acceptable tests and is approved by the Contracting Officer. The certificate shall state that the item has been tested in accordance with the specified organization's test methods and that the item conforms to the specified organization's standard. For equipment whose compliance with organizational standards or specifications is not regulated by an organization using its own listing or label as proof of compliance, a certificate of compliance from the manufacturer shall be submitted for approval. The certificate shall identify the manufacturer, the product, and the referenced standard and shall simply state that the manufacturer certifies that the product conforms to all requirements of the project specification and of the referenced standards listed.

End of Section 01 33 00

Notes:

RS - Resubmittal FC - Furnish as Corrected NR - Not Required

C - Contractor A - Approved

TBS - To be Selected

A/C - Approved with Comments S - Supplier

D - Disapproved CS - Color Selected

SUB- SPECIFICATION APPROVAL MATERIALS SUBMIT

MITTAL PARAGRAPH DESCRIPTION OF NEEDED NEEDED TO

No. No. ITEM SUBMITTED SUBMIT BY BY CODE DATE ENGINEER DATE REMARKS

Sec. 01010 General

1 1.14.1 Personnel Roster for Security

Sec. 01311 Progress Schedule

2 1.3.1 Final Progress Schedule (within 5 days of NTP)

3 1.3.2 Updated Progress Schedule

Sec. 02325 Dredging

10 1.4.1 Dredging Plan incl. Hurricane Plans

11 1.4.2 Hydrographic Survey Drawings (Pre Dredging)

12 1.4.2 Hydrographic Survey Drawings (Post Dredging)

13 1.4.3 Dredge Volume Calculations

CONTRACTOR:

CONTRACTOR

ACTION

CONTRACTOR

SCHEDULE DATES

ENGINEER

ACTION

SUBMITTAL REGISTER

ADDRESS: JOB NUMBER:

Dredge Station Brunswick Access Channel

PNUM 8759909

CONTRACT NUMBER:

OWNER: US DEPT OF HOMELAND SECURITY / US COAST GUARD

ENGINEER: US COAST GUARD CIVIL ENGINEERING UNIT MIAMI

CODE

DIVISION 35 WATERWAYS AND MARINE

35 20 23-1

SECTION 35 20 23

DREDGING

1.1 SUMMARY

Perform all operations necessary for the removal of all materials to the required dimensions as shown on the drawings, the satisfactory disposal thereof, and all operations thereto. The work includes providing and maintaining the hydraulic pipeline from dredging site to the disposal site, the construction and maintenance of disposal earth berm, and leveling the grade of all new disposed material within the disposal area. If nighttime operations are to be conducted the contractor shall inform the contracting officer and comply with lighting requirements listed in paragraph 3.2.2 of this section.

1.2 REFERENCES

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

CODE OF FEDERAL REGULATIONS (CFR)

29 CFR 1910 Occupational Safety and Health Standards

1.3 SUBMITTALS

Submit the following in accordance with Section 01300, "Submittals."

1.3.1 Dredging Plan

Submit a detailed plan of the entire dredging and dredge material disposal operation including a list of equipment, environmental controls, means of transport, and means and locations of intermediate storage or handling of dredge material. This submittal is required 21 days prior to start of work. Provide plans and procedures should gale force winds or higher be forecast. Precautions shall include, but not be limited to, closing all openings, removing all loose materials, tools and equipment from exposed locations, anchoring and tying down barge, and removing or securing scaffolding and other temporary work

1.3.2 Hydrographic Survey Drawings

Submit results of hydrographic surveys taken before and after dredging. The pre-dredge survey submittal is required prior to dredging operations and the post-survey submittal is required prior to final acceptance of the completed work.

1.3.3 Dredge Volume Calculations

Submit results of actual gross and design volume of dredged material. Cover sheet shall be signed, dated and sealed by the licensed surveyor.

1.4 CHARACTER OF MATERIALS

All shoal material within the basin limits has occurred since the last maintenance dredging job in fall 2012.

The shoal material is expected to be predominantly silty-clay and possibly construction debris (concrete rubble, etc). Insitu rock , if encountered, shall not be dredged. Debris (trash, junk) may exist in the channel.

35 20 23-2

1.5 ARTIFICIAL OBSTRUCTIONS

The Government anticipates debris such as, but not limited to, metal bands, pallets, pieces of broken cable, rope, hose, and broken piles. The Government has no knowledge of existing wrecks, wreckage, or other material of such size or character as to require the use of explosives or special or additional plant for its economical removal. Prior to dredging, the Contractor shall rake the dredge area and remove debris encountered. Debris removed from the dredged area shall be removed from the water. Explosives shall not be used under any circumstance. Disposal of debris shall be the responsibility of the Contractor and disposal shall be outside the limits of USCG Station New Orleans property.

1.6 QUANTITY OF MATERIAL

1.6.1 Overdepth Dredging

To cover unavoidable inaccuracies of dredging processes, removal of material to a depth of one foot below the elevation –10.0 feet MLLW depth specified and within the dredging limits will be allowed.

1.6.2 Side Slopes

Side slopes at the side limits of the dredge area shall be 4:1 (horizontal:vertical). Project the side slope from the dredged bottom elevation at the limits of the dredge area line outward until it intersects the existing bottom of the adjacent waterway. Dredging on side slopes shall follow, as closely as practicable, the lines indicated on referenced drawings. One of the sides of the dredged area along the pier as indicated in the site plan shall be a nearly vertical box cut.

1.6.3 Slides

In the event sliding occurs in any excavation after its completion but prior to its acceptance, the Contractor shall remove such portions of the slide at no additional cost to the Government. In particular, the contractor shall follow up on the vertical box cut in the vicinity of the South concrete bulkhead.

1.7 OBSTRUCTION OF WORK AREA

The Government will undertake to keep the boat basin free from vessels or other obstructions. The Contractor will be required to conduct the work in such manner as to obstruct navigation as little as possible, and in case the Contractor’s plant so obstructs the navigable waters as to make difficult, or endanger the passage of any vessels, said plant shall be promptly moved on the approach of any vessel to such an extent as may be necessary to afford a practicable passage. Upon completion of the work the Contractor shall promptly remove his plant, including pipeline, ranges, buoys, piles, pipeline, and other marks placed by him under the contract in navigable waters or on shore. The Coast Guard will need access to the facilities during the work period and in some instances it may be an emergency. The Contractor’s plant must have the ability to be maneuvered from the boat basin immediately following direction by the Coast Guard. One emergency movement of the Contractor’s plant should be included in the bid price.

2 PRODUCTS

Not used.

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 purpose. Furnish, at the request of the Contracting

35 20 23-3

Officer and/or COR, boats, boatmen, laborers, and materials necessary for inspecting, supervising, and surveying the work.

3.2 CONDUCT OF DREDGING WORK

3.2.1 Interference with Navigation

Minimize interference with the use of channels and passages. The Contracting Officer will direct the shifting or moving of dredges or the interruption of dredging operations to accommodate the movement of vessels and floating equipment, if necessary.

3.2.2 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.

3.2.3 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.

3.2.4 Plant

Maintain the plant, scows, coamings, barges, pipelines, and associated equipment to meet the requirements of the work. Monitor and promptly repair leaks or breaks along the pipeline.

3.2.5 Disposal of Excavated Material

Provide for safe transportation and disposal of dredged materials. Transport and dispose of dredged material in the area designated for disposal of dredged material. The deposit of dredged materials in unauthorized places is forbidden.

3.2.5.1 Method of Disposal

The material excavated from the boat basin shall be transported by hydraulic pipeline to the upland disposal location indicated. The use of floating and submerged discharge lines is authorized; the Contractor shall ensure compliance with the provisions in this Specification Section The contractor must also ensure minimal disturbance of the shoreline areas.

3.2.5.2 Disposal in Indicated Fill Area

Discharge into the disposal area shall be at the center of the disposal area. No alternate disposal will be allowed. The Contractor will pump the material via pipeline to the indicated disposal site. Provide and maintain necessary bulkheads, dikes, ditches, spillways, and other construction necessary to confine and retain the fill in the dredge fill area.

3.2.6 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 location near the site of the work, as directed.

35 20 23-4

3.2.7 Working in the Vicinity of Structures

The Contractor shall exercise caution when working in the vicinity of structures adjacent to and within the piers and bulkheads. Repair of any damage resulting from excessive or improper excavation of the basin shall be the responsibility of the Contractor. When dredging to obtain the required dimensions might endanger any structure, the Contracting Officer, upon request, may reduce the required excavation in the vicinity of such a structure.

3.2.8 Plant Removal

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

3.2.9 Work Safety

Comply with 29 CFR 1910.

3.3 DISPOSAL SITE

Transport the dredge sediment by submerged hydraulic pipeline to the U.S. Army Corps of Engineers Sediment Placement Facility on Andrews Island. Comply with all requirements the U.S. Army Corps of Engineers for use of the facility.

3.3.1 Prevention and Damage

The dredged material shall be transported and deposited in such a manner as to insure that no damage will concur to highways, levees, drainage systems, pipelines, utilities, structures, revetments, or other improvements.

3.3.2 Disposal Operation

During disposal operations the Contractor will provide constant radio contact between the personnel on the dredge, at the disposal area, and at the pipeline. The Contractor's disposal area and pipeline personnel are to quickly notify the dredge operator should the disposal area discharge exceed water quality standards, of dike failure, and of pipeline leakage. The Contractor shall inform the Contracting Officer’s Technical Representative (COTR) daily of all problems associated with the dikes, pipeline or disposal area discharge. The time or occurrence and of corrective action to problem should also be reported. Plant downtime to meet water quality standards or to make dike or pipeline repairs will be at no cost to the Government or a basis for a time extension.

3.3.3 Placement of Material

During placement in the disposal area, the Contractor shall perform inspections of the pipeline, dike, and weir discharge at least twice daily. Dredging shall be immediately suspended when necessary and for the time period required to achieve and maintain water quality standards of the discharge from the disposal area. Also, dredging shall be immediately suspended in the event of imminent or actual dike failure or pipeline leakage. Dredging will not resume until dike and/or pipeline repairs have been completed.

3.3.4 Misplaced Material

Material deposited outside of the disposal area or above the maximum indicated elevation will require removal or degrading of such material at the Contractor's expense.

3.3.5 Deposit in Non-Approved Areas

35 20 23-5

Any material that is deposited elsewhere than in the disposal area shown on the Site Plan will be required to be removed and deposited in the approved area at no additional expense to the Government.

3.3.6 Floating and Submerged Pipelines

Provide and maintain navigation warning signs along the 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.

3.3.6.1 Submerged

In the event that the Contractor elects to submerge a pipeline constructed of semi-buoyant material, such as PVC pipe or similar low density material, the Contractor shall securely anchor the pipeline to prevent the pipeline from lifting off the bottom under any conditions. The Contractor shall make daily underwater inspections of the submerged pipeline to ensure buoyancy has not loosened the anchors. The Contractor shall remove all anchors when the submerged pipeline is removed. The location of the entire length of pipeline shall be marked with signs, buoys, lights, an flags conforming to the Federal navigational regulations.

3.3.6.2 Floating

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 be clearly marked. In no case will the Contractor's pipeline be allowed to fluctuate between the surface and the bottom, or lie partially submerged. Lights shall be installed on the floating pipeline. The lights shall be supported either by buoys or by temporary piling, provided by the Contractor and approved by the Contracting Officer.

3.3.7 Excessive Discharge Pipe Leakage

Excessive leakage of the discharge pipe shall be sufficient cause for the Contracting Officer to require the Contractor to cease pumping until corrective measures are taken.

3.3.8 Disposal Site Maintenance

The contractor shall relocate the slurry control pipe as required to ensure an even distribution of material throughout the disposal area.

3.4 MEASUREMENT

Contractor shall provide hydrographic surveys before and after dredging. The hydrographic surveys shall be performed by an independent surveyor licensed to perform such work by the State of Georgia. The vertical datum for all soundings shall be Mean Lower low water (MLLW). These surveys shall be used to calculate the actual gross volume and design volume of dredged material removed.

3.4.1 Method of Measurement

The material removed will be measured by cubic yard in place, by means of soundings taken before and after dredging. The contract drawings represent existing conditions based on current available information, but will be verified and corrected by the Contractor, if necessary, by soundings taken before dredging. Prior to start of dredging operations five copies of the pre-dredge survey shall be submitted to the Contracting Officer. Upon completion of the dredge, the Contractor shall perform a post-dredge survey. This, along with the pre-dredge survey, shall be the sole source used to calculate the actual gross volume of dredged material. The design volume is the volume within the design template that consists of the bottom of basin at the dredge depth including the allowable overdepth and the specified side slopes. The surveyor who performed the surveys shall calculate the gross volume and design volume from the results of the surveys. The Contractor shall submit for approval, five copies of the post-

35 20 23-6 dredge survey, and the calculations along with sufficient documentation to verify the accuracy of the results.

3.4.2 Extent of Dredge Surveys

The dredge surveys shall cover all the bottom area within the dredge limits of the bottom and side slopes areas. Bottom elevations shall be determined to the nearest tenth of a foot at horizontal intervals of no more than 20 feet.

3.5 FINAL EXAMINATION AND ACCEPTANCE

As soon as practicable and no later than five (5) days after the completion of the entire work, the area will be examined by sounding or sweeping, or both. Remove shoals and lumps by dragging the bottom or by dredging. However, if the bottom is soft and the shoal areas form no material obstruction to navigation, removal may be waived at the discretion of the Contracting Officer. When areas are found to be in satisfactory condition, the work therein will be accepted as complete. Final volume for payment will be subject to deductions for excessive overdepth, dredging outside of authorized areas, or disposal of material in an unauthorized manner.

*** End of Section 35 20 23 ***

APPENDIX A

VICINITY MAP

1.18 FINAL INSPECTION AND ACCEPTANCE

1.7 OBSTRUCTION OF WORK AREA

3.5 FINAL EXAMINATION AND ACCEPTANCE