17-B-0004_VOL_II.pdf

IDIQ Contract for Rental of 27-30 inch W91278-17-B-0004 Cutterhead Pipeline Dredge for Dredging Mobile District Navigation Projects in Alabama, Mississippi and Florida

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Section 01 00 00

Statement of Work – Description/Specifications

INDEX

PARA NO. PARAGRAPH TITLE

1. SCOPE OF WORK

2. DREDGE AND ATTENDANT PLANT REQUIREMENTS

3. PERFORMANCE

4. PHYSICAL DATA

5. WORK LAYOUT AND ORDER OF WORK

6. RESERVED

7. DREDGING (EXCAVATING OF SHOALS)

8. DISPOSAL OF EXCAVATED MATERIALS

9. QUALITY CONTROL

10. QUALITY ASSURANCE

11. CONTRACT INVOICES/RECEIVING OFFICE

12. RESERVED

13. RESERVED

14. BIDDER’S QUALIFICATIONS AND PRE-AWARD INSPECTION OF

PLANT

15. PLANT

16. COMMUNICATION

17. EQUIPMENT OWNERSHIP AND OPERATING EXPENSE

SCHEDULE

18. PRECONSTRUCTION CONFERENCE/ADDITIONAL SAFETY

REQUIREMENTS

19. CREW

20. GENERAL SAFETY REQUIREMENTS

21. SPECIAL SAFETY REQUIREMENTS

22. PAYMENTS

23. TASK ORDER PROCEDURES

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SECTION 01 00 00

STATEMENT OF WORK – DESCRIPTION/SPECIFICATIONS

1. SCOPE OF WORK:

1.1. DREDGING: The work to be performed under this contract consists of dredging at various locations within the Mobile District. These sites include both deep and shallow draft projects and the Gulf Intracoastal Waterway as well as coastal restoration projects, beach nourishment projects and any other project requiring the use of a dredge in Alabama, Mississippi, and Florida. The scope of this contract also provides for any other size dredge other than those specifically called for in the specifications. The scope also includes supplying dredge related supplies and equipment such as tugs, barges, cranes, geotextile tubes, sheetpile, land based heavy equipment for disposal operations, and other marine equipment associated with channels and coastal restoration projects. Other marine equipment or materials such as geotextile tubes, sheetpile, additional hand labor crews, etc., that are not specifically called for within these specifications will be negotiated with the individual task order. The Contracting Officer may elect to negotiate cubic yard task orders for some projects in lieu of the standard dredge rental rate.

1.1.1 WORK FOR OTHERS: The work to be performed under this contract also consists of dredging for state ports in Alabama, Mississippi and Florida as well as other non federal entities. Material from these projects ranges from coarse sands to fine silt as well as heavy debris. The contractor can expect greater than normal debris such as steel wire, cable, driftwood and other industrial type products near the docks, piers and other structures located in the dredging template. The contractor will also be expected to dredge closer than normal to private docks, piers and other structures. All costs associated with work for others shall be included in Bid Item 2, DREDGING 100% Pay Time Work for Others.

1.2. DREDGE PLANT: The work to be performed under this contract consists of furnishing a hydraulic cutterhead pipeline dredge with pump discharge of not less than 27-inch diameter or more than 30-inch diameter and must be able to work in exposed marine environments along the Gulf Coast that are exposed to rough sea conditions. The dredge will be complete with all necessary materials, supplies, (including fuel, power, and water) labor, and transportation for maintenance dredging operations as specified in the above paragraph. More specific dredge and attendant plant requirements are discussed below.

1.2.1 ADDITIONAL DREDGE: The contractor may be required to provide additional dredges meeting all the qualifications in these specifications at the same bid rate (or converted rate if different dredge size/configuration).

If the government requires the services of a second dredge, ample

01 00 00 - 3 notification (not less than 60 days, in writing from the COR) will be given to the contractor to provide the second dredge.

1.3. DREDGED MATERIAL DISPOSAL: All removed materials will be placed in approved disposal areas as directed by the Contracting Officer or his Authorized Representative and as discussed in these specifications.

1.4. GENERAL: All work, material and services not expressly called for in these specifications which may be necessary for complete and proper operations to carry out the contract in good faith shall be performed, furnished and installed by the Contractor at no increase in cost to the Government. The Contracting Officer or his Authorized Representative may at any time require the Contractor to relocate to a different dredging site should shoaling rates, or other circumstances so dictate. The Government reserves the right to contract additional dredges to perform dredging work on the same projects and geographical area.

2. DREDGE AND ATTENDANT PLANT REQUIREMENTS:

2.1. DREDGE REQUIREMENTS: The dredge offered shall be capable of continuous operation with a minimum horsepower rate as shown below which includes the horsepower applied on the main dredge pump (and ladder pump, if applicable). For the requested dredge size, most of the work that is anticipated to be performed under this contract is considered a “walking job,” therefore, additional pump size and/or horsepower does not justify a competitive advantage in the number of hours in the bid schedule. The Contractor shall have available for use at all times a variety of serviceable interchangeable pump impellers (2 minimum), a spare pump case, and a spare serviceable cutter to permit the dredge to operate efficiently under varying conditions described in paragraph entitled, "PHYSICAL DATA". The dredge shall be capable of dredging upstream as well as downstream and will so operate as directed by the Contracting Officer.

The dredge shall be capable of dredging the full bottom dimension of up to 400 feet and depth of 52 feet, plus minimal over-swinging through one swing (cut) of the cutterhead from a given set of the dredge subject to a velocity of less than 2 feet per second given normal conditions. The cut coverage shall be accomplished in one set of the dredge and at or before the dredge reaches its normal set-ahead dredge spud positioning. That cut coverage is expected to be made while at the dredge’s maximum walking speed. The swing of the cutterhead will be accomplished through the use of conventional dredge swing anchors or previously placed deadmen. The dredge shall be equipped with an electronic positioning system and include the equipment which will record such data.

2.2. HORSEPOWER REQUIREMENTS: Dredge Minimum Horsepower - In

using the following table, only one (1) main dredge pump on board the dredge shall be used. The horsepower of auxiliary dredge pumps shall not be

01 00 00 - 4 considered. Horsepower is equal to the correlating connected brake horsepower applied to the dredge pump. Those dredges which have less horsepower or have less discharge diameter than the minimum shown below for the size dredge bid will be considered non-responsive.

27-inch Discharge main pump(s) 3750 H.P. (min) ladder pump 900 H.P. (min) 30-inch Discharge main pump(s) 5000 H.P. (min) ladder pump 1200 H.P. (min)

For the purpose of bidding and evaluating bids, it will be considered the dredge will be used for the number of hours (100% Pay Time) given in the following table. However, this is not to be construed by the Contractor that the Government guarantees that the dredge will be used for this number of hours. Bidders should use the hours given in the following TABLE for the appropriate size dredge that is being bid. Should the contractor have a dredge with a discharge diameter between 27 and 30 inches, the number of 100% Pay Time Hours to be placed on the bidding schedule shall be computed by the difference in the square diameter of the discharge pipe between the hours given in the TABLE for the 27 and 30 inch dredges, as applicable. The number of hours shown in the TABLE is estimated. The actual hours may be more or less than what is shown.

Dredge Size 100% Hours Work for Others 100% Hours 27 inch Basic Dredge 4211 27 inch Basic Dredge 500 With ladder pump 3579 With ladder pump 425 With traveling spuds 3579 With traveling spuds 425 With ladder and t. spuds 2948 With ladder and t. spuds 350

30 inch Basic Dredge 3411 30 inch Basic Dredge 405 With ladder pump 2900 With ladder pump 344 With traveling spuds 2900 With traveling spuds 344 With ladder and t. spuds 2388 With ladder and t. spuds 284

Differences in the basic dredge hours (27 and 30 inch) are computed on the difference in the square diameter of the discharge pipe.

Additional allowance in dredge production will be given for dredges with ladder pumps and/or traveling spuds (spud carriage). A 15% reduction is shown in the table hours for ladder pumps or traveling spuds.

The traveling spud must have a minimum of 20’ of travel to be considered for bid purposes. A pre-award inspection of the dredge will be conducted by the Government and the contractor must adequately demonstrate the dredge is

01 00 00 - 5 capable of traveling 20’ utilizing a traveling spud while the Government representative is present. If it is determined that the traveling spud does not meet this requirement then the contractors bid price will revert to the converted price based on the number of hours in the table above without a traveling spud. In addition, the contractor may elect to bid based on the number of 100% pay hours without a traveling spud and elect to add a traveling spud later in the contract.

The 100% bid price for the dredge will then be converted based on the number of hours with a traveling spud provided the traveling spud meets the requirements herein. The following equation was used to calculate the hours in the table for the bid schedule.

Equation: (1-(0.15 for ladder pump + 0.15 for traveling spud)) X Basic Dredge hours for the dredge size = Number of hours for bid schedule

Example: Dredge A has a 30 inch discharge diameter, a ladder pump and conventional walking spuds. Applying the equation yields: (1-(0.15+0)) X 3411 = 2900 hours.

2.3. ATTENDANT PLANT:

2.3.1. Attendant plant shall be composed of such barges, fuel, water, pipe derrick, anchor, etc., floating, submerged, and slip joint discharge pipe, and other attendant or auxiliary plant as may be required for operations under these specifications whether or not these items are specifically mentioned. The auxiliary and attendant plant shall be in good condition and of sufficient size and capability to efficiently serve the dredge.

2.3.2. The Contractor will have available at all times during the duration of work a minimum amount of 25,000 feet combination of floating, submerged, and shore pipeline. The Contractor shall determine for himself the lengths of floating and submerged line necessary. If the Contractor’s combination of floating and submerged line lengths is found to be inefficient, the Contractor may be directed to adjust the combination thereof to a more efficient combination all at no increase in cost to the contract. Also, at the option of the Government, the Contractor may be required to mobilize and utilize additional pipeline. The cost for the initial mobilization and final demobilization of the additional pipeline will be paid at the same rate as Bid Item 5 – Intermediate Mobilization and Demobilization of Pipeline per unit of 1,000 feet of pipe. After mobilization of the additional pipe, the pipe becomes part of the plant and setup and breakdown will be paid for under 70% time or intermediate mobilization and demobilization of pipeline, whichever is applicable, even if used on another task order under this contract at no additional cost to the Government.

Mobilization and demobilization payment of the pipe will be paid at 60% upon arrival and the remaining 40% upon final plant demobilization.

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The Contractor will be notified in writing and will be expected to have the additional pipeline on site within 20 days of receiving the written notice. If the additional pipeline is not on site within the 20 days, and no further dredging can be performed as a result of the lack of additional pipeline, then the dredge will be placed on 0% pay time until the entire required pipeline is in place ready for commencement of dredging. The Contractor would then be eligible for 100% pay time once material is satisfactorily passing through the pipeline. Any material that is deposited elsewhere than in places designated or approved by the Contracting Officer may be required to be removed, and the Contractor will be required to redeposit such misplaced material where directed at his expense (no additional costs to this contract). Floating lines and shore pipe will be capable of visual inspection for leaks at all times during the operation. Submerged pipelines shall be air tested before placed in operation. One swivel floating elbow section, or a flexible pipe section, shall be furnished. All pipeline shall be essentially the same diameter as the dredge discharge as designed by the pump manufacturer. If the Contractor mixes dredge pipeline sizes, it must be shown not to adversely affect the dredge production as compared to utilizing one pipeline size.

2.3.3. The attendant plant shall include a minimum of two vessels, each a twin screw shallow draft dredge tender. Both vessels shall be of sufficient size and horsepower, capable of performing all duties necessary to efficiently carry out dredging operations in normal currents and conditions and both shall be available at all times with one operator and one deckhand each to insure efficient operations. In the event the dredge is not self-propelled, the attendant plant shall include one additional towing vessel, with sufficient horsepower to be determined by the Contractor, to be available at all times to adequately move the dredging plant to allow passage of traffic, to move the dredging plant from one location to another, to completely move the dredge plant to safe harbor in case of adverse weather condition, and to assist in the total dredging operation. No division in pay will be made for the additional towing vessel and the two dredge tenders.

They will be considered as part of the dredging plant and shall be in operation at all times regardless of the pay status of the dredge.

2.3.3(a). For use in shore work and upland areas, the contractor shall furnish the following equipment: two crawler type low ground pressure tractors, at least equal in capability to a Caterpillar D-6. These tractors shall have a hydraulic operated dozer blade. These tractors shall have qualified operators and be available at all times regardless of the pay status of the dredge. A separate independent light plant with radio communication to the dredge shall be used in all upland disposal areas. The Contracting Officer may elect to have the contractor substitute a track mounted crawler hoe with minimum 1 cubic yard bucket for one of the dozers, at no additional cost. Additional equipment for performing disposal area maintenance may be required by the Contracting Officer and shall be negotiated in the individual task order. The cost of the additional equipment shall be paid for using the 100% time bid item and no contract mod shall be executed for the additional equipment.

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2.3.3(b). Spill Barge: The Contractor must also have, as part of the dredging plant, a “controllable spill barge” to disperse the dredged material in the open water D/A(s). The Contractor must have the mechanism built into the spill barge to allow full control of the barge’s movements, side to side, and forward/backward. The Contractor must have an electronic tracking system on-board this spill barge, with which the spill barge operator will know where the barge is at all times and be able to make controlled movements. The Contractor should submit information, as part of his DEPOSITION PLAN, explaining how this requirement will be met, mechanically, technically and functionally.

2.3.4. The dredge shall be equipped to capture real time slurry density and pump output side velocity, pump(s) vacuum, pump(s) RPM, line pressure, dredge load chart and computed dredge production. Legible printouts of the recordings shall be furnished to the Contracting Officer for each day's operation on a daily basis.

The creation of these charts shall be real time and observable by the Government Inspector(s) at all times.

2.3.5. Transport Vessel/Survey Boat: The Contractor shall provide one deep "V" hull transport vessel/survey boat, with twin propellers, not less than 40 feet in overall length, with enclosed space for three passengers after installation of all required Contractor furnished survey equipment and survey party crew (Survey Equipment/Personnel defined elsewhere), to adequately operate and survey in all channels included in the scope of work limits along with accompanying disposal areas. This vessel must have an operator and deckhand on site at all times; be capable of traveling at a speed of 20 knots (23 MPH) or greater in good weather and capable of traveling safely at night and in intense fog; (such vessel shall meet or exceed US Coast Guard regulations for vessels 65 feet or less in length); and the vessel shall have a Certificate of Inspection by the US Coast Guard, or at least from a Marine Surveyor. This vessel shall be for the primary use of Government Inspector shift changes and Government directed hydrographic surveying. The use of this vessel for Contractor’s crew changes, or any other use of this vessel by the Contractor shall be secondary to Government Inspector shift changes and Government directed hydrographic surveys. This vessel shall be equipped with the following at a minimum: built-in fuel tanks with correctly operating fuel gauges; marine and company radios; windshield wipers;

running and spot lights; and all required survey equipment. The Contractor shall secure satisfactory landing location for this vessel.

2.3.6. Survey Party: The Contractor shall furnish one full survey party available for 12 hr/day survey operations 7 days a week. The minimum full-time crew for the survey boat shall be one qualified survey boat operator for the daylight shift, plus up to a 4 man survey party to perform surveys to support the entire dredging process. Also, a person responsible for plotting of surveys should be on board the dredge during the daylight shift. The survey party should have a sufficient number of qualified personnel in order to adequately survey under any condition.

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The party shall survey the current conditions of the area being dredged and perform the survey assignments, operating all necessary electronic positioning and computer equipment.

2.3.7. Survey Equipment: The Contractor furnished survey equipment must meet or exceed all requirements listed below as well as any other requirements referred to in these specifications:

2.3.7(a). Positioning System: The positioning system must be capable of providing positional accuracies of the vessel within three meters or less. This system must have a proven track record and have the manufacturer’s written backing stating the accuracy thereof. The system utilized must be capable of providing twenty-four hour, seven days a week positional coverage within the above stated accuracies. The contractor, if properly equipped with a Global Positioning System, may utilize such a system as long as the accuracies are confirmed and documented during the use of the system. The positioning system and survey software will have the capability of providing visual guidance to the vessel operator and acquire positioning and guidance updates on no more than one second time increments.

2.3.7(b). Sounding Equipment: The sounding equipment will consist of a sounding machine/device capable of providing updated soundings on no more than 1/20 second intervals and have an accuracy rating of not less than +/-0.5 feet. Sounding device will have analog charting (real time) within the device and will have all the capabilities of calibrating to a bar check utilizing the Norfolk Method of bar checking. All depths acquired will consist of dual frequency soundings utilizing a high operating 208 kHz frequency transducer and a low operating 41 kHz or 24 kHz frequency transducer. All digitally acquired sounding data for the channel surveys and D/A surveys will be those acquired, as directed by the Contracting Officer Representative, utilizing either high operating 208 kHz frequency transducer or 41 kHz/24 kHz transducer, as applicable. The high frequency soundings will be shown in conjunction with the 41 kHz /24 kHz soundings on the analog chart of the sounding device. All soundings will be acquired on a continuous basis with plotting of data based on the scale and size of the plot and in clearly legible print.

2.3.7(c). Soundings: Soundings for the surveys for the channel and disposal areas as required by this contract shall be made by an electronic sounding device. The electronic sounding device shall be similar and equal to the Teledyne Odom Echotrac MKIII echo sounder, as requirements dictate. All costs associated with the required soundings and data compilation will be included in the contract price for dredging.

2.3.7(d). Acquired and Processed Data: The survey system shall use a computer and software capable of handling all required data points and plotting of those data points. If the Contractor is utilizing HYPACK to perform his

01 00 00 - 9 required surveys, the Contractor shall use the Government provided channel files. The Contractor shall submit the HYPACK project files for the specific survey performed. These files contain all the files that make up the survey including raw and edited, line, log, and tide files associated with each survey among others. Otherwise, the Contractor shall utilize a system capable of acquiring or converting all, unedited raw data (horizontal and vertical) to an IBM, ASCII compatible format prior to submittal to the Government. The ASCII format shall be compatible with the MS DOS Operation system. Sounding files shall contain single line records. Each record shall contain the easting, northing, depth, date, and time for one sounding. Each item in the record shall be separated by a space character (ASCII 32 (10)) and the record shall be terminated by a line feed with carriage return. All records shall conform to the format shown below:

EASTING NORTHING DEPTH DATE TIME

123456.78 876543.21 -42.3 01/15/91 14:22:13.3

Said survey system shall provide a means of plotting all data points for submittal in hard copy form according to the requirements listed herein.

Routine/verification surveys shall be submitted within 24 hours of the survey and larger surveys, such as for open water disposal areas, shall be submitted within 48 hours of the survey. Both surveys shall include plots and data collection information. All plots submitted shall be provided on full size 22” x 34” (ANSI ‘D’ size) plot paper (half size, 11” x 17” if approved by the Authorized Representative) and delineate no less than the following: all nav aids; north arrow; station data (corrected to MLLW); date of survey; grid ticks; surveyor’s name; vessel name; channel lines and any other pertinent information. Scale of plan view plots shall be 1” = 200’ and cross-sectional plots as specified by the Authorized Representative. Plan view plots shall delineate actual vessel track along the specific route taken and print depths acquired along the route on a scale clearly legible; cross-sectional plots shall be plotted on hard copies which delineate the channel dimensions in a template format. All hard copy plots shall be in the form of CADD drawing files in Microstation SE format. The CADD drawing files and data (Hypack files/folder) used to produce the hard copy plots shall be provided on a CD in the format previously specified and in unedited form. All submittals shall include both raw and edited data and all supporting field notes, squat tables, tide data, and scrolls, both in electronic form on a CD and a printed/plotted format on paper.

2.3.7(e). Dredge Electronic Tracking Position: The Contractor shall be able to visually display continuous real time positioning of the dredge, by track plot or CRT screen, in relation to the before-dredging surveyed shoals and/or more updated surveyed shoals. Dredge location accuracy shall meet the requirement of the Corps' "Manual of Survey Instructions". An identical dredge electronic tracking system shall be provided to the Government inspector and

01 00 00 - 10 equipped in the inspector’s office and a copy of the Contractor's survey plan.

A written discussion of the method the Contractor intends to use in order to satisfy these requirements shall be included in the Contractor's bidding schedule discussions.

2.3.8. BOOSTER PUMP: The Contractor shall furnish a booster pump within 20 calendar days of notice by the Contracting Officer. The brake horsepower of the booster pump shall be equal to or greater than 80 percent of the brake horsepower of the mobilized dredge pump. The diameter of the booster pump discharge shall be the same diameter as that of the mobilized dredge. The Contracting Officer may direct the demobilization of the booster pump at any time.

2.3.8(a) Booster Pump Requirements - For the purpose of bidding and evaluating bids, the booster will use the number of hours (100% Pay Time) given in the following table for the appropriate size dredge, however, this is not to be construed by the Contractor that the Government guarantees that the booster will be used for this number of hours. Bidders should use the hours given in the following table for the size dredge that is being bid.

100% Hrs

27-inch Discharge 494 30-inch Discharge 400

3. PERFORMANCE:

3.1. GENERAL: Upon initiation of work, the Contractor shall prosecute the work assigned him with faithfulness and energy, and at all times endeavor to meet the schedule of excavation (dredging) and disposal operations as determined by the Contracting Officer. The Contractor shall be expected to conduct excavation dredging and disposal operations seven days per week, twenty-four hours per day, including those days, which have been declared by Congress to be legal holidays for per diem employees of the Federal Government (applies only to the rental portion of this contract). The order of work to be performed under this contract cannot be determined except as the work progresses. The Contractor shall be expected to pre-construct dredge pipelines needed for this work. The Government will facilitate this by issuing excavation assignments far enough in advance for the Contractor to accomplish the pre-positioned pipeline construction. The Contractor shall bear all direct, overhead and collateral expenses incidental to the operation, upkeep and repair of all items of plant. He shall maintain the plant in a good state of repair, shall arrange for a supply of renewal parts to be on hand when needed for all plant and shall provide and maintain efficient personnel for each item of plant employed in connection with

01 00 00 - 11 the work. Equipment will be in condition to render efficient, economical and continuous service and shall be equipped with all mechanical devices and equipment required by Federal, State and local authorities, provided that nothing in the paragraph shall be construed to limit the authority of the Contracting Officer to prohibit the use of any piece of equipment which, in the opinion of the Contracting Officer, is mechanically unsafe for use. Equipment which the Contracting Officer or his authorized representative considers does not perform in a satisfactory or efficient manner shall be repaired or replaced by the Contractor at the Contractor's expense within 24 hours after notification by the Contracting Officer or his authorized representative. Failure of the equipment to perform to the satisfaction of the Contracting Officer, and failure by the Contractor to effect timely replacement of the unsatisfactory equipment, shall be sufficient cause for the Government to procure replacement equipment and charge the Contractor for any excess costs associated therewith. The equipment shall be registered by the Contractor with all Federal, State and local authorities requiring registration, and registration plates or other evidence of registration shall be displayed in accordance with the requirements of the registering authority.

3.2. INSPECTION OF PLANT: Upon arrival of the dredge and attendant plant, it will be inspected for any deficiency in safety or health requirements. The Contractor should have already inspected the plant and corrected all deficiencies found. In the absence of any deficiencies, the plant will be put to work. In the event that any plant is deficient safety wise or health wise to prevent safe operations, the plant will not be put to work, but will continue in a nonpayment status until the safety deficiencies are corrected to the satisfaction of the Contracting Officer, at which time the plant will be put to work.

3.3. TERMINATION OF WORK: It is anticipated that upon completion of the excavation assignment(s) all the plant will be released to the Contractor.

However, the Contracting officer, by written notice, may terminate any task order, in whole or in part, when it is in the Government's interest. If any task order is terminated, the Government shall be liable only for payment under the payment provisions of this contract for services rendered before the effective date of termination.

3.4 Plant Delivery: For bidding purposes, the assumed mobilization point will be Gulfport Harbor, MS, however the actual mobilization point will be determined upon issuance of the first task order. If the actual mobilization point differs from this assumed mobilization point of Gulfport, MS, then an adjustment for mobilization will be determined by computing the actual mileage difference between the two sites (either plus or minus depending upon whether the contractor’s plant transits more or less distance to the actual site from their original dredge location), by the paid rate for the Mobilization Bar to Bar bid item.

The actual point of delivery may be determined by the Contracting Officer as any

01 00 00 - 12 location within the scope described in paragraph 1 of this section on the basis of shoaling rates and channel conditions.

3.5. PRIVATE WORK RELEASE: By mutual agreement of both the Contractor and the Contracting Officer, the dredge may be released from this contract for short periods of time to perform work for others in the same vicinity. The dredge shall, however, be returned to operations under this contract within 48 hours after notice by the Contracting Officer to resume such contract work.

4. PHYSICAL DATA:

Data and information furnished or referred to below is for the Contractor's information. The Government will not be responsible for any interpretation or conclusion drawn therefrom by the Contractor.

4.1. General: The indications of physical conditions on the drawings (if provided in the solicitation package) and in the specifications are the result of site investigations and surveys.

4.2. Location: The work to be done under these specifications is located anywhere within the boundaries of Mobile District.

4.3. Subsurface Investigation: Contractor's Investigation Responsibility: The Contractor should make his own investigation of submerged, surface and overhead structures in the work areas and other locations he finds necessary to traverse. The exact location, depths and heights of submarine cables, pipes, highlines, docks, piers, bulkheads bridges, etc. (as applicable), are not known and it will be necessary for the Contractor to ascertain interference problems and notify the respective owners in advance of dredging operations. The Contractor shall make all arrangements with the respective owners of the structure to assure satisfactory completion of dredging in the vicinity with a minimum interruption of service, and shall perform his operations in such a manner as will avoid damage to these facilities. Considering the above specified structures and any others the Contractor might find in the work areas, the Contractor shall not dredge within 50 feet of and/or dispose of dredged material in the vicinity of any marine structure.

If the marine structures are damaged by the dredging operations, it will be the responsibility of the Contractor to repair or rebuild the damaged facility at no cost to the Government.

4.4. Weather Conditions: The sites of the work are exposed to local disturbances in Mississippi Sound, Mobile Bay, other coastal areas and upper Gulf of Mexico which may cause suspension of the work for short periods of time. Generally the sites of the work do not provide safe refuge from tropical hurricanes which may occur from June to December. Should a hurricane occur during the course of the work, it will be the responsibility of the Contractor to select a safe harbor. There are no known unusual currents at any of the sites except during extreme tidal

01 00 00 - 13 events when velocities of 2 to 4 miles per hour may be expected; however, the Contractor should investigate all the sites of the work and determine for himself the requirements of the work. The mean tidal range is approximately 1.5 feet.

The working season extends over the entire year. However, the work area(s) are affected by extended periods of strong winds, predominately from the South or Southeast. Lost time due to opposing adverse natural elements as outlined above will be considered justification for an extension of the contract time.

4.5. Transportation Facilities: The work areas are accessible by water via the Gulf Intracoastal Waterway and the Gulf of Mexico, leading from Mobile Bay and/or New Orleans harbor. Highway access (State, Federal and Local) is available to the near vicinity of all work areas.

4.6. Channel Traffic: The traffic using the channels to be dredged under these specifications is considered heavy and consists mainly of commercial vessels, charter boats and pleasure craft. There is ample room in the area to be dredged to accommodate traffic without undue interference with the dredging operations specified herein; however, at times the Contractor can be expected to be required to move his dredge plant completely clear of the channel due to the size of a particular vessel. CAUTION: When navigation conditions become hazardous due to inclement weather (fog, storm, etc) or other circumstances, the dredge and related equipment shall be moved to provide the maximum possible channel width (even full channel) for safe passage of any impending project traffic. The Contractor shall maintain appropriate communication with project traffic during such hazardous conditions. The Contractor shall particularly comply with all U.S. Coast Guard regulations pertaining to proper activation of fog (and any other) signaling devices (sound, light, etc).

4.7. Obstruction of Channel: The Government will not undertake to keep the area and channel free from vessels or other obstructions, except to the extent of such 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 in such manner as to obstruct navigation as little as possible, and in case the Contractor’s plant so obstructs the channel as to make difficult or endanger the passage of 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 the completion of the work, the Contractor shall promptly remove his plant, including ranges, buoys, piles, and other marks placed by him under the contract in navigable waters or on shore. Due caution shall be exercised in dredging adjacent to wharves and bulkheads in order that they will not sustain damage or be undermined by the dredging operations. No dredging shall be done within 50 feet of any established harbor line, wharf or other structure unless approved in advance by the Contracting Officer. Any such damaged structure shall be repaired or replaced by the Contractor at no expense to the Government.

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4.8. CHARACTER OF MATERIAL: The material to be removed will be highly variable between projects. It will vary from coarse sand to fine clays and silts and in some areas may have extreme levels of debris from storm related damages. For the purposes of this solicitation, the material to be dredged shall be considered as unclassified.

5. WORK LAYOUT AND ORDER OF WORK

5.1. WORK LAYOUT: Dredging limits will be designated at each assignment by coordinates and/or channel centerline station. The Contractor shall furnish, at its own expense, all stakes, pipe, equipment, range markers and labor as may be required to maintain any part of the work from the ranges and gages established by the Government and to check for verification starting and stopping points on each shoal area. It shall be the responsibility of the Contractor to maintain and preserve all stakes and other marks established by the Contracting Officer until authorized to remove them, and if such works are destroyed by the Contractor through his negligence prior to their authorized removal, they may be replaced by the Contracting Officer at his discretion. The expense of replacement will be deducted from any amounts due or to become due to the Contractor.

5.2. ORDER OF WORK:

5.2.1. The order of work to be performed under this contract cannot generally be determined except as the work progresses. Successive dredging location assignments may be either upstream or downstream from the previous assignments, and may not be at consecutive or contiguous locations. Repetitive dredging may also be required at a given location.

5.2.2. Dredging assignments shall be determined by the Contracting Officer or his representative, and will be given to the Contractor's representative aboard the plant who is in charge of the operations. Assignments may be changed at any time without any prior notice. The Contractor may also be required to stop work at any time without completing an assignment. There is no guarantee of specific work assignments under this contract.

5.2.3 Advanced Line Set-up. Before completion of an assignment and when the next work assignment is 5 miles or less away, the Contractor will be expected to pre-position available pipeline for the next work assignment to reduce non-productive time. This requirement can be waived or enforced at the discretion of the Contracting Officer.

6. RESERVED.

7. DREDGING (EXCAVATING OF SHOALS):

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7.1. General: The shoals removed from the before mentioned channels shall be transported and satisfactorily deposited into open water sites, upland disposal areas and/or beach disposal areas as discussed in the scope of work. Additional disposal requirements are covered in this section.

7.2. Dredge (Excavation) Plant Instrumentation: All dredge (excavation) plant utilized on this contract shall be instrumented to monitor the location of the dredge during excavation as specified herein. The data produced by this instrumentation will be collected by automated (computer-digitized) means and stored on a CD in an IBM compatible format, DOS Operating System, ASCII format. The Contractor’s proposed format for these data shall be submitted at the pre-construction conference and must be approved prior to the start of the work. The Contractor's initial submittal shall include written instructions to explain the data format used. Within 24 hours after commencement of dredging, the Contractor shall submit a hard copy and disk with the data in the format as previously approved for verification. All data will be tied to the date and real time of day with data point intervals not greater than five (5) minutes. Each disk can be used to its maximum storage space up to one week’s data, if capable. The original disks will be submitted to the Government as soon as full or at the end of each week’s collection (includes dredge and spill barge data).

7.2.1. The following elements will be monitored, as a minimum:

a. Dredge I.D. designation.

b. Dredge location by coordinates and by cut(s), i.e. east, west, center, 1, 2, 3, etc and whether first cut or redredge.

c. Dredge cutterhead location (at all times) both horizontally and vertically.

d. Dredge horizontal discharge location (at all times).

7.2.2. The Dredge Plant Instrumentation is a part of the dredge plant and must be functional at all times. If failure of any part thereof occurs, the Contractor will be expected to repair the failed part within the next 24 hours restoring full operations. If failure to repair does not occur in that period, the particular plant affected will be considered non-responsive to the contract requirement and will either be replaced or a redundancy part added to render the plant fully operational to include the monitored data, all at no additional increased price or time to the contract.

7.2.3. The requirements of paragraph 7.2 and accompanying paragraphs are in addition to the requirements set forth in paragraph 2.

8. DISPOSAL OF EXCAVATED MATERIALS:

8.1. General: Excavated material shall be transported to and disposed of in the proper disposal area as described below and as depicted on the contract

01 00 00 - 16 drawings (if provided). The Contractor will develop his disposal procedures based on these requirements/restrictions. The Contractor will submit a DEPOSITION PLAN to the Contracting Officer for approval prior to disposal of any dredged material under this contract. The Contractor's DEPOSITION PLAN shall be completely explanatory and include all assumptions, statements of fact, computations and a narrative to fully explain the procedures that the Contractor will follow during the contract. The Contractor's DEPOSITION PLAN will address each different disposal situation.

8.1.1. Permits have been procured by the Government for deposition of dredged material in the designated disposal areas.

8.1.2. The Contractor shall provide equipment and operators satisfactory to manipulate dredge material and move the outflow pipe as directed by the Contracting Officer for the duration of the dredging operations (24 hours per day) at a particular D/A. All operators shall have radio communication with the dredge at all times. The operators shall have available, and in operating condition at all times, a marine vessel or appropriate four wheel drive vehicle for transporting the crew-members to and from the D/A for inspection, monitoring and/or O&M purposes. The contractor shall furnish at least a two man crew, both first aid and CPR certified, on the spill barge/disposal area at all times during operations. The dump crew shall make at least one trip around the disposal area per shift to ensure that all disposal area dikes are in good condition with no leaks, failures, etc.

8.1.3. For dredged material pumped through a pipeline, the Contractor is responsible to select a pipeline route to the D/A and methodology of construction (type of pipeline and installation) and/or plant equipment layout that will not cause a hazard to existing navigation nor undue restriction to marine traffic, particularly in the marked navigation channels and the adjacent private docking/mooring/sailing fairways. Particular attention should be given to the pipeline route or other plant layout as related to the existing accesses of the businesses along the project banks. These accesses should not be blocked or restricted to those businesses. If the Contractor’s pipeline or equipment is found to be blocking or restricting any business’s access or use area, it will be the Contractor’s responsibility to coordinate with the business to bring a solution to that restriction problem, even if the Contractor’s pipeline or equipment has to be moved or relocated (all at no increase to contract price). Care shall be taken to avoid damaging private structures.

8.1.4. Except as otherwise authorized by the Contracting Officer’s Representative in writing, no deposition of dredged material shall be done

UNLESS AN INSPECTOR APPOINTED BY THE CONTRACTING OFFICER’S

REPRESENTATIVE IS PRESENT AT THE TIME.

8.2. RESERVED.

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8.3 WEIR BOX/DISCHARGE PIPES, UPLAND DISPOSAL:

8.3.1. Weir Box Maintenance: Dredged material shall be placed in the upland disposal site within containment areas sufficient in volume to effectively settle solids. At no time shall any material be allowed to enter the weir box. Any material escaping the upland disposal area will be considered misplaced material and cleanup provisions as stated in paragraph entitled OBSTRUCTION OF NAVIGABLE WATERWAYS, of SECTION 00700 will be enacted. Adequate settling time shall be maintained by raising the elevation of the weirs crest at the drainage structure as necessary. Sufficient size overflow boards shall be furnished by the Contractor to fill the slotted columns on all open sides of the weir box. Overflow boards shall not exceed six (6) inches in height. The Contractor shall be responsible for the maintenance of all weirs and drainage structures until completion and acceptance of work. Prior to dredging operations, discharge pipes through containment dikes should be inspected for obvious displacement due to settlement, and joints in the discharge pipes shall be sealed to prevent seepage through joints. Polyethylene may be used and supplied by the Contractor around the weir box as an additional safeguard against seepage. The polyethylene will be supplied and installed at no additional cost to the Government.

8.3.2. MATERIAL PLACEMENT IN UPLAND AREAS: Material shall be placed within upland disposal areas in such a manner that damage to the containment dike, weir box, or discharge pipes from the area does not occur. The Contractor will be responsible for any damage resulting from his disposal operations, inside or outside of the disposal area. Dredged material placement in each area will be discussed in the Preconstruction Conference. Material shall not be placed higher than that elevation which allows for two feet of freeboard along any portion of dike, nor shall material be allowed to cross the containment area in such a way as to block drainage from other portions of the containment area to the weir box.

All dredged material shall be sloped to drain toward the weir box.

8.3.3. Natural Drainage: The Contractor will be required to maintain the natural drainage within the disposal areas and shall construct all ditches as may be necessary to accomplish this purpose to the satisfaction of the Contracting Officer. Dredging operations shall be suspended should the Contractor fail to immediately restore to its normal condition any drainage system, either natural or artificial, which was damaged as a result of dredging operations.

8.3.4. Pipeline Corridor and Ramps: Existing pipeline corridor and ramps are the only approved access areas to upland disposal areas. No alterations to these corridors or ramps or construction or clearing of new areas are permitted, unless approved by the Contracting Officer.

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8.4. The Government will be monitoring turbidity in the Open Water Disposal Areas throughout the life of the contract to ensure the Contractor complies with permit requirements for Open Water Disposal Areas in this contract. The Contractor shall provide a turbidity meter equivalent to a HACH 2100 Portable Turbidimeter. Turbidity shall not exceed the limits specified in the Water Qualtity Certification for the project. If turbidity resulting from the project exceeds these levels, the Contractor will cease dredging and notify the Authorized Representative of the Contracting Officer.

8.5 “Thin Layer Dispersal” Process: The disposal (dispersal) process shall be operated in such a manner that the dredged material will settle out in the designated open water disposal areas (D/A) in thin layers. It is desired that the deposited material thickness not exceed a six (6) inch thick lift even if the deposited material settles immediately to the bottom after falling out of the dredge pipeline. However, due to the inaccuracies in the disposal process, material thickness up to a maximum of twelve (12) inches will be allowed. This specifically means that the existing bottom surfaces of disposal areas cannot be raised in elevation more than twelve (12) inches throughout the dredging operations. Any material deposited in excess of twelve (12) inches shall be removed by the Contractor at his own expense with no increase in contract price or time. The Contractor shall provide a positive means to disperse the dredged material deposit over enough D/A bottom surface area to accomplish this restriction. The Contractor’s Disposal Plan discussed in this contract will explain the procedure by which the Contractor intends to accomplish this requirement, stating all facts, assumptions, computations and operating procedures that will lead to anticipated success of the “Thin Layer Dispersal” process. The Contractor’s plan will be subject to the approval of the Contracting Officer’s Authorized Representative. No dredge discharge will take place in a particular disposal area prior to the Contractor’s submittal of the “before construction” survey (discussed elsewhere within this Specification), plotted in plan view. The “after construction” survey shall be made by the Contractor within one (1) week after dredge discharge into a particular disposal area ceases and that data plotted and submitted in plan view and in X-sections along with the “before construction” survey by the Contractor before final acceptance of the contract work in that area of channel is given. The Contractor shall prepare, operate and maintain the disposal areas in a manner to accomplish the contract required results.