B.08.03_-_Solicitation_Amendment_0001_(SECTION_02_31_11.00_34_Drainage_and_Site_Work_REVa)_-_W912HP19R5000_-_FY19_Daniels_Island_Ditching.pdf

POST 45 FY19 DANIEL ISLAND W912HP-19-R-5000

PLACEMENT AREA SITE WORK

SECOND ROUND DITCHING – ACCOMPANYING REVISION A

SECTION 02 31 11.00 34 PAGE 1

SECTION 02 31 11.00 34

DRAINAGE AND SITE WORK BY RENTAL EQUIPMENT

PART 1 GENERAL

1.1. SUMMARY

1.2. REFERENCES

1.3. MEASUREMENT AND PAYMENT

1.3.1. Work covered by Contract Price

1.3.2. Equipment Rental Estimated Quantities

1.4. SUBMITTALS

1.5. SITE CONDITIONS

1.5.1. Daily Transportation to Site

1.6. MINIMUM PERSONNEL FOR RENTAL CONTRACT

1.6.1. Equipment Operator

1.6.2. Job Superintendent

1.6.3. Oiler/Laborer Duties

PART 2 PRODUCTS

2.1. LONG-REACH EXCAVATOR

2.2. LOW GROUND PRESSURE BULLDOZER

(REV#A)

2.3 TRI-AXLE DUMP TRUCK

2.4 COMPOST FILTER SOCK

(/REV#A)

PART 3 EXECUTION

3.1. INSPECTION

3.2. ORDER OF WORK

3.3. CLEARING/BURNING

SECTION 02 31 11.00 34 PAGE 2

PART 1 GENERAL

1.1. SUMMARY

(REV#A)

The work covered by this section consists of furnishing all plant, equipment, labor, transportation, fuel, lubricant, supplies and materials, and performing all operations in connection with moving materials within Daniel Island Placement Area – Middle Cell, in accordance with these specifications and as directed by the Contracting Officer or his Authorized Representative.

Work will include but not be limited to construction of drainage ditches, clearing, grading of existing dikes and berms, spreading of excavated materials to dry, removal of excavated material from downstream of outlet control structure and relocation to within placement area, installation, maintenance, and removal of erosion control compost filter socks, and appurtenant items.

(/REV#A)

1.2. REFERENCES

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 Safety and Health Requirements Manual

EM 1110-2-1003 Hydrographic Surveying Manual

1.3. MEASUREMENT AND PAYMENT

Payment items for the work of this contract will be made as listed in the Bidding Schedule and described below. All costs for items of work which are not specifically mentioned or are incidental to completion of the work, are to be listed in a particular lump sum or unit price payment item that is most closely associated with the work involved. The lump sum price and payment made for each item listed shall constitute full compensation for furnishing all plant, labor, materials, and equipment, and performing any associated Contractor quality control, environmental protection, meeting safety requirements, and for performing all work required where separate payment is not otherwise provided.

Progress payments shall be made in accordance with the contract clause PAYMENTS UNDER FIXED-PRICE CONSTRUCTION CONTRACTS. Progress payments shall be based on a mutually agreeable percentage of completed work. Monthly progress payments will be based on approximate quantities estimated and agreed on with the construction representative.

1.3.1. Work covered by Contract Price

ITEM NO 0001, MOBILIZATION AND DEMOBILIZATION – DANIEL ISLAND PLACEMENT AREA

– MIDDLE CELL, shall include all cost connected with mobilization and demobilization of all the contractor’s plant, equipment and personnel to and from the construction site. This work item shall be measured as a lump sum.

Movement of equipment from designated mobilization points as shown on the

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contract drawings to areas where work is directed to begin and other movement within the placement area, as directed by the Contracting Officer, will be paid for at the contract hourly rate for the equipment.

(REV#A)

The Contractor shall mobilize the specified equipment (under ITEM NO 0002, 0003, and 0004), including all individual operating supplies, equipment and implements (V-buckets, mats, fuel, lubricants, miscellaneous materials and supplies, etc.) to the location indicated on Contract Drawings. Mobilization (under ITEM NO 0001) shall be considered complete when the machines with all necessary attachments and/or implements arrive within the placement area at the specified location where rental work will commence. No payment will be made for hourly work of the equipment until the equipment is mobilized to the mobilization point as is shown on the contract drawings. All equipment shall be mobilized so as to meet the requirements of SECTION 00 10 00 Paragraph SOLICITATION, CONTRACT LINE ITEM NUMBER (CLIN) SCHEDULE. The Government intends to commence work with long-reach excavators (ITEM NO 0002) and a tri-axle dump truck (ITEM 0004).

(/REV#A)

At the time of final demobilization (under ITEM NO 0001), the rental equipment may be situated at any location within the placement area where rental work was completed. It shall be the Contractor's responsibility to demobilize the equipment by matting/walking/moving the equipment to his chosen demobilization point and demobilize from there.

(REV#A)

ITEM NO 0002, LONG REACH EXCAVATOR RENTAL Two (2), shall include all cost connected with all ditching efforts in the Daniel Island Placement Area, and excavation and loading of material that has discharged from the northern outlet control structure. This work item shall be measured as an hourly unit price.

(/REV#A)

ITEM NO 0003, LGP BULLDOZER One (1), shall include all cost connected with all ditching efforts in the Daniel Island Placement Area. This work item shall be measured as an hourly unit price.

(REV#A)

ITEM NO 0004, TRI-AXLE DUMP TRUCK One (1), shall include all cost connected with hauling and relocating excavated material that has discharged from the northern outlet control structure to within the placement area.

ITEM NO 0005, COMPOST FILTER SOCK, shall include all material and labor costs connected with furnishing, installing, maintaining, and removal of compost filter sock for erosion control immediately adjacent to and surrounding all activities associated with the excavation of material that has discharged from the northern outlet control structure. This work item shall be measured as a lump sum.

ITEM NO 0006, CLEAN OUT OUTFALL PIPE, shall include all cost connected with

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the removal of all material from inside the discharge pipe at the northern outlet control structure and relocation to inside the placement area. This work item shall be measured as a lump sum.

(/REV#A)

1.3.2. Equipment Rental Estimated Quantities

Hourly payment will be made for each half-hour of actual operation of equipment in which satisfactory performance of work is accomplished, as determined by the Contracting Officer’s Representative at the site.

“Satisfactory Performance” shall be defined as operation of equipment in a safe and efficient manner (i.e. meeting or exceeding minimum production rates, as determined by the Contracting Officer's Representative) and performing only those operations which have been directed by the Contracting Officer's Representative.

The normal workday for the long-reach excavators shall be 10 hours per day Monday through Friday, excluding Federal holidays. The use of 43 hours per week assumes a total of 50 hours per week minus an estimated 15% down-time for equipment breakdown, operator absence, and weather. Maintenance and repair including routine fueling and lubrication are the Contractor’s responsibility and no payment shall be made for such downtime. This cost will also include clean-up of the site at completion of contract.

Work on Saturday and/or Sunday may be approved on a case-by-case basis as make-up days for days lost to weather during the normal work week. Any weekend work (dates and hours per day) shall be mutually agreeable between the Contractor and the Government.

If the equipment operators and oilers show up at the site ready for work but are prohibited from working by the Contracting Officer's Representative due to inclement weather or adverse conditions, payment will be made at the hourly rate for one-half hour (1/2 hour) “show time” for each operator present. This credit will not apply to equipment which would not have otherwise worked that day or to equipment which is broken down.

The estimated number of equipment hours stated in the bid schedule is for comparison of bids only. This time may be adjusted in accordance with the Variation Clause. The total estimated quantities for the rental work are as follows:

(REV#A)

EQUIPMENT DESCRIPTION ESTIMATED QUANTITY

LONG REACH EXCAVATOR RENTAL Two (2) 680 hours each 1,400 HRS

LGP BULLDOZER One (1) 700 HRS

TRI-AXLE DUMP TRUCK 80 HRS

SECTION 02 31 11.00 34 PAGE 5

1.4. SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with this section.

SD-01 Preconstruction Submittals

Plant & Equipment Schedule (Reference Paragraph “Equipment and Machinery)

(REV#A) Compost Filter Sock (/REV#A)

1.5. SITE CONDITIONS

The first round of ditching for this placement area was completed between March 2018 and November 2018. Daniel Island Placement Area – Middle Cell was last utilized/pumped in November of 2016, and was filled to capacity. Due to the recent dredging operation that used this site, it is expected that the material contained in the interior of the site will still be very soft during construction.

(REV#A)

In early 2019 a portion of the ditches partially collapsed, which resulted in a washout of material that discharged from the outlet control structure, and was deposited in the low-lying area immediately outside of the discharge pipe. This occurred at the north end of the placement area.

(/REV#A)

The maintenance and new work material placed in 2016 was hydraulically deposited in a slurry state and is comprised of predominately fine-grained material. Since November 2016, the material has undergone natural desiccation (drying) and consolidation (decrease in volume). Desiccation dries the surface layer of material by evaporation while consolidation removes water from the underlying material through compression, resulting in a desiccation crust. It has been found that, left to itself, fine-grained dredged material will, after an extended period of time, reach a water content (ratio of weight of water to weight of solids) of about its liquid limit (LL). The water content of the crust has been found to be approximately 1.2 times the material's plastic limit (1.2 X PL). The processes of consolidation and desiccation are enhanced/accelerated by removal of surface water from the material. The removal of surface water is accomplished by progressive ditching. As ditches in the material are progressively deepened, a thicker desiccation crust forms that compresses the wetter layers below. The seepage path for water being drained from the material is also shortened, thereby increasing the rate of consolidation.

Experience has shown that the dredged material crust will support LGP equipment but it usually will not support heavier construction equipment such as rubber-tired haulers or scrapers. The Contractor should anticipate

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localized ditch slope failures while ditching operations are conducted. Other items, including but not limited to installation of temporary drainage culverts and flapgates, shall be done as necessary.

1.5.1. Daily Transportation to Site

Daniel Island Placement Area is not legally accessible by land. The Contractor shall furnish all equipment and supplies, including skiffs or marine equipment, for the daily transportation of crews, supplies and equipment to and from the job site. The minimum plant to be used shall include all individual operating supplies, equipment, attachments, and implements, including all fuel, lubricants, materials, miscellaneous supplies, etc. Alternatively, it may be possible to access the site via land if an acceptable arrangement is made with the property owners of the adjacent properties, but any such arrangement is solely the responsibility of the bidder, and all liability, obligations, etc., will be solely between the bidder and the property owner. The Contractor shall obtain any and all rights-of-entry across private lands which he may use. The Contractor shall be held responsible for liabilities of any nature or kind arising from any trespassing or damage occasioned by his operations.

1.6. MINIMUM PERSONNEL FOR RENTAL CONTRACT

The Contractor shall be required to provide sufficiently trained and experienced operating personnel. In the event an operator or an oiler is found to be inefficient in performance of the duties assigned, the Contracting Officer may suspend operation of any or all equipment until sufficiently trained and experienced personnel are provided.

1.6.1. Equipment Operator

The Contractor shall provide a minimum of one (1) operator for each piece of equipment specified.

1.6.2. Job Superintendent

The Contractor shall appoint and provide one (1) job superintendent. He shall be familiar with the nature of the work and shall report to the Government Representative. He shall ensure that all equipment is operating and performing the work directed by the Contracting Officer in a safe and efficient manner.

1.6.3. Oiler/Laborer Duties

The Contractor shall provide a minimum of one (1) oiler per five (5) pieces of equipment specified. The oiler(s) will be required to perform other tasks besides normal duties, such as removing spillway boards, cleaning out spillway risers, removing minor blockages from drainage ditches with a shovel, etc. For purposes of the contract clause REQUIRED WAGE RATES an “oiler” is shall have a labor classification as LABORER, Common or General.

PART 2 PRODUCTS

All equipment shall be suitable for soft ground construction.

2.1. LONG-REACH EXCAVATOR

SECTION 02 31 11.00 34 PAGE 7

The Contractor shall furnish two (2) hydraulic excavators (long-reach excavator), with 3/4 cubic yard (minimum) heaped capacity bucket (bucket to be ditch cleaning bucket). Excavator shall be a manufacturer's standard factory-built long-reach machine, minimum ground level reach shall be a 50' measured from the center pin of the machine, and a minimum power of 125 SAE net engine (flywheel) horsepower. Each excavator shall be supplied with a minimum of twelve (12) suitable mats and shall be supplied with a trapezoidal “V” bucket in addition to the basic ditch cleaning bucket. The Contracting Officer shall have the right to inspect and require all mats be in a condition acceptable to the Government. Examples of excavators meeting these requirements include, but are not limited to, the Caterpillar EL240 Long- Reach Arrangement (60’ reach) and the Caterpillar 320BL.

2.2. LOW GROUND PRESSURE BULLDOZER

The Contractor shall furnish one (1) factory built low ground pressure (LGP) bulldozer with an angling blade and tilt (i.e. with long track and wide shoes). Bulldozer shall be a manufacturer’s standard factory-built bulldozer, minimum power of 130 SAE net engine (flywheel) horsepower and ground pressure not exceeding 4.6 psi. The bulldozer shall be furnished with and equipped to pull a disc harrow, disc to have 12’ minimum cutting width, 22” blades (min.), and 9” 13” blade spacing. The bulldozer shall be furnished with a rootrake in addition to the required blade. The bulldozer may have an optional winch (in good operating condition with minimum 100 feet of 7/8” dia. cable). An example of a bulldozer meeting these requirements includes, but is not limited to, a Caterpillar model D6M.

(REV#A)

2.3 TRI-AXLE DUMP TRUCK

The Contractor shall furnish one (1) Tri-axle Dump Truck with a minimum hauling capacity of 18 C.Y.

2.4 COMPOST FILTER SOCK

The Contractor shall furnish and install 1,000 Linear Feet (L.F.) of 18” diameter compost filter socks around the immediate perimeter of the excavation of material that has discharged from the northern outlet control structure. Install in accordance with manufacturer’s instructions and at locations directed by the Contracting Officer. Compost filter sock mesh material shall be at a minimum 5-mil HDPE with a 23% Ultraviolet Stability at 1,000 Hours (ASTM G-155) and a 9 month minimum functional longevity, similar to Filtrexx® 5 Mil HDPE SoxxTM, or approved equal. Compost filler material shall be a well decomposed, weed-free organic matter derived from agriculture, food, stump grindings, and yard or wood/bark organic matter sources. The compost should be aerobically composted. The compost should possess no objectionable odors and should be reasonably free (<1% by dry weight) of man-made foreign matter. The compost product should not resemble the raw material from which it was derived. Wood and bark chips, ground construction debris or reprocessed wood products are not acceptable as the organic component of the mix. The physical parameters of the compost shall comply with the standards in the following table:

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Compost Standards

Organic Matter Content 80% - 100% (dry weight basis) Organic Portion Fibrous and elongated pH 5.5 - 8.0 Moisture Content 35% - 55% Particle Size 98% pass through 1” screen Soluble Salt Concentration 5.0 dS/m (mmhos/cm) Maximum

PART 3 EXECUTION

3.1. INSPECTION

All rental work will be conducted under the direction of the Contracting Officer and shall be subject to full-time inspection by his appointed Government Representative.

3.2. ORDER OF WORK

(REV#A)

Work associated with items 0004, 0005, and 0006 shall commence immediately after mobilization, as directed by the Contracting Officer. The Contractor will be directed to install compost filter socks, then remove the discharged material in and beyond the outfall structure, and to place the excavated materials within the placement area. Contracting Officer will instruct the Contractor to remove compost filter socks, in their entirety, at any time prior to completion of ditching and drainage operations.

(/REV#A)

Ditching and drainage operations in the Middle Cell are necessary to maintain adequate surface drainage to continue to dry the site. The Contractor will be directed by the Contracting Officer to "clean out" or deepen existing drainage ditches and construct additional drainage ditches as necessary to maintain positive surface drainage. Order of work and the exact nature of the work will be determined by the Contracting Officer as the work progresses in the field.

3.3. CLEARING/BURNING

During this contract, some clearing of roots, small trees, brush and other vegetation may be required. As directed by the Contracting Officer, cleared material shall be disposed of by burning in the interior of the site. All burning shall comply with SC DHEC Regulation 61-62.2. The Contractor shall be responsible for compliance with all Federal, State (DHEC), county, and local laws regulating the building of fires, and will be held responsible for all damages resulting from his fires. The Contractor shall notify the South Carolina Forestry Commission (at 1-800-777-FIRE) before burning and shall obtain a "Notification Number". Such number shall be recorded on the

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Contractor's Daily QC Report and shall be phoned in to the Contracting Officer's Representative. The Contractor shall also obtain any necessary county or local permits prior to any burning.

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