4.0FOREBAYITEM 4.1CLEARING AND GRUBBING(Same as Item 2.2)

ITEM 4.2EARTH EXCAVATION(Same as Item 2.3)

ITEM 4.3ROCK EXCAVATION(Same as Item 2.4)

ITEM 4.4HAULING OF MATERIALS(Same as Item 2.5)

ITEM 4.5STONE MASONRY(Same as Item 2.7)

ITEM 4.6REINFORCING BARS GRADE 40(Same as Item 2.8)

ITEM 4.7FORM/DEFORM WORKS(Same as Item 2.9)

ITEM 4.8CONCRETING WORKS FOR FOUNDATION (3500 PSI)(Same as Item 2.10)

ITEM 4.9GATE LIFTING MECHANISM(Same as Item 2.11)

ITEM 4.10FLATBAR TRASHRACK FABRICATION AND INSTALLATION4.10.1 GENERAL4.10.1.1 DESCRIPTIONThis item shall consists of all materials, equipment, labor and incidentals necessary for the fabrication and installation of trashracks.The trashracks ends shall be constructed with A36 flat bars which dimensions and spacing are as shown in the Plans.

4.10.2 CONTRACTORS SCOPEThe Contractors Scope as follows:a.The Contractor shall supply, install, test and commission a fully operative trashracks as reflected in the Plans and in accordance with the provision of this specification or as instructed by the Engineer.b.The contractor shall construct the framing of the Inlet Portal gate slots and other related steel works and concrete embedded works. 4.10.3MATERIAL REQUIREMENTSAll materials shall be new and shall be meet the required ultimate strength, limit of elasticity, ductility, hardness, durability, suitability for the intended service and best engineering practice. All materials shall comply with the latest applicable standard of ASTM unless otherwise specified or approved by the Engineer.All materials that develop defects during or after fabrication shall be rejected notwithstanding that they have previously passed specified tests and inspections, and met the applicable requirements stated herein.Use materials of size and thickness as shown in the Plans. If not indicated, use materials of required size and thickness to produce adequate strength and fasteners to support assembly.Fabricate items to be exposed to view of material entirely free of surface blemishes by grinding or by welding and grinding prior to cleaning, treating, and finishing. Ease exposed edges to a radius of approximately one (1) millimeters (1/32 inch) unless otherwise shown. Joints shall be fabricated accurately for close fit. Weld exposed joints continuously unless otherwise indicated or approved. Dress exposed welds flush and smooth. All welds shall be according to the applicable provisions as stated herein.Form exposed connections with flush, smooth, hairline joints. Use concealed fasteners wherever possible. Use Phillips flathead (countersunk) bolts or screws for exposed fasteners, unless otherwise shown or specified.a.Furnish flat washer under connections requiring raised bolt heads.b.Furnish lock washer under nuts when through bolting occurs.c.Punch, reinforce, drill and tap metal Work as required to receive hardware and other appurtenant items.Unless otherwise specified or noted, items indicated to be galvanized shall receive a zinc coating by the hot dip process, after fabrication, complying with the following:a.ASTM A 123 for plain and fabricated material, and assembled productsb.ASTM A 153 for iron and steel hardware4.10.4 EXECUTION4.10.4.1 INSTALLATION OF EMBEDDED ITEMSa.Temporarily brace and secure items which are to be built into concrete.b.Isolate non ferrous metal surfaces to be permanently fastened in contact with ferrous metal surfaces, concrete, or masonry by coating non ferrous metal surface with bituminous mastic, prior to installation.c.Fit and set fabricated metal work accurately in location, alignment and elevation securely fastened in place.d.Set loose items on cleaned bearing surfaces, using wedges or other adjustments as required. Solidly pack open spaces with bedding mortar or grout.4.10.4.2FIELD TESTFollowing the completion of each gate installation, the gates shall be operated through at least two complete open-close-open cycle. If an electric or hydraulic operator is used, limit switches shall be adjusted following the manufacturers instructions.4.10.5 MEASUREMENT/BASIS OF PAYMENTFabrication, supply and installation of gates in the Bill of Quantities are a lump sum item. No measurement of area will be made for such item.The accepted quantities measured shall be paid for at the Contract unit price for the gates Pay Items that is included in the Bill of Quantities. Price and payments shall be full compensation for furnishing all labor, equipment, tools and incidentals necessary to complete the Work prescribed in this item.

ITEM 4.11 RIPRAP/SLOPE PROTECTION4.11.1 GENERAL4.11.1.1 DESCRIPTIONThe Work under this item includes providing all labor, materials, tools and equipment necessary for furnishing and placing a protective covering of stone, as shown on the Plans, or as directed by the Engineer.a.Stone RiprapThis riprap shall consist of individual rock fragments, dense, sound and resistant to abrasion and free of cracks, seams and other defects that would tend to increase unduly their susceptibility to destruction by water action.b.Grouted RiprapStones for grouted riprap shall consist of rough uneven quarry stone as nearly rectangular in section as possible. The stone shall be sound, tough, durable, dense, resistant to the action of air and water, and suitable in all respects for the purpose intended.4.11.2MATERIAL REQUIREMENTS4.11.2.1 STONE RIPRAPFurnish durable field or quarry stone that is sound, hard, dense, resistant to the action of air and water, and free of seams, cracks, or other structural defects. Use stone pieces with a length and width no more than twice the thickness. Place materials in lines, dimensions and grades as shown on the Plans. Do not place stone riprap without the Engineer's approval of the stone quality, size, and shape.The rock fragments shall not be compacted but shall be unloaded by crane and graded of in manner to ensure that the larger rock fragments are uniformly distributed. The smaller rock fragments shall fill the spaces between the larger fragments, resulting to compact uniform layers of riprap of the specified nominal thickness.Do not drop riprap from such a height to cause. Prevent mixture or incorporation of dirt or other materials with the riprap during placing operation. Placing of riprap by any method, machine or hand, will be permitted as long as specified requirements are obtained except placing of riprap in slope parallel layers to obtain required thickness or otherwise specified by the Engineer. Placement shall be done in such a way as to obtain the required thickness at each point in a single operation.Except for the rock and small fragments to be used as wedges, the rocks shall be irregular cubic shaped and the smallest dimensions of a given piece shall not less than one third of the largest dimension.4.11.2.2 GROUTED RIPRAPGrouted riprap and boulder lined channel edge shall be placed at the locations as shown in the Plans and installed with the following requirements: a. The sub-grade to receive each boulder shall be excavated and any unstable material shall be removed. Approved material shall be placed and compacted in requirements as mention in ASTM D 698 to re-establish the sub-grade of each boulder. Unstable material shall be removed from the site and disposed of by Contractor. Care shall be taken during compaction to avoid disturbing and/or damaging the integrity of the boulder channel edge. The top of all boulders shall be as indicated in the Plans. Finished grades and sub-grades for boulders will be determined from the height of each boulder used. b. The boulders shall be carefully picked and arranged so that adjacent rock surfaces match within two (2) inches in top elevation and two (2) inches along the vertical exposed face or channel side of rock. Boulders shall be placed such that adjacent boulders "touch" each other to minimize voids and grout placed between boulders. c.Placement of small rocks shall be approved by the Engineer prior to grouting. Before placing the grout, any type of debris, fines, smaller rock, or silt shall be removed from around or under the boulders. d.Dewatering shall be implemented to guarantee that the grout will not be placed in water and for a period of twenty four hours after the grout has been placed. Keep boulders receiving grout wet at all times prior to receiving grout. The concrete grout shall be placed by injection methods by pumping under low pressure, through a two-inch maximum diameter hose to ensure complete penetration of the grout into the void area. Grout will be placed up to eight inches from the top of boulders, or as directed by the Engineer. The Operator shall be able to stop the flow and will place grout in the voids and not on the surface of the rocks. e.Grout shall be troweled out and finished to minimize visibility. Clean and wash any spillage before the grout sets. The visual surfaces of boulders will be free of grout to provide a clean, natural appearance. Make sure all voids are filled between the boulders.

4.11.2.2 CURINGIf hot or dry weather, the masonry shall be satisfactory protected from the sun and shall be kept wet for a period of at least three days after completion.4.11.3 METHOD OF MEASUREMENTThe quantity to be paid for shall be the number of cubic meters stone masonry complete in place and accepted. Projection extending beyond the faces of the walls shall not be included. In computing the quantity for payment, the dimensions used shall be those shown on the Plans or ordered by writing by the Engineer. No deductions shall be made for weep holes drain pipes or other openings of less than one square meter in area.The quantity of masonry, determined as provided in the section above, Method of Measurement, shall be paid for at the contract unit price per cubic meter for stone masonry, which price and payment shall be full compensation for furnishing and placing all materials, including mortar for masonry, for all necessary excavations, and for all labor, equipment, tools and incidentals necessary to complete the item.

ITEM 4.12PERIMETER FENCE4.12.1 GENERAL4.12.1.1 DESCRIPTIONThis item shall govern for supplying and constructing of perimeter fence to enclose and secure the project site and provide screening from construction activities in accordance with the details and at the locations shown on the plans.4.12.2 MATERIAL REQUIREMENTSMaterials shall conform to ASTM F 1083, Ferrous Metals, Zinc Coated; and detailed specifications forming the various parts thereto; and other requirements specified herein. Zinc coated metal membrane (including fabric, gates, posts, rails, hardware and other ferrous metal items) after fabrication shall be reasonably free of excessive roughness, blisters and sal-ammoniac spots.If indicated on the Plans or as directed by the Engineer to use barbed wire, it shall be fine coated (galvanized) steel, meeting the requirements of ASTMDesignation A121, at five (5) inch maximum spacing, fine coated.Accessories as necessary caps, rail and brace ends, wire ties or clips, braces and tension bands, tension bars, truss rods, and miscellaneous accessories conforming to ASTM F 626.4.12.3 EXECUTIONContractor shall provide and install gates at the locations shown on the plans.Fence posts shall be spaced at the intervals required on the plans. Posts shall be set in a vertical position. Corner and pull posts shall be braced in two directions. End and gate posts shall be braced in one direction. Where alignment changes thirty (30) degrees or more, a corner post shall be installed. All posts shall be placed the minimum depth below ground as shown on the Drawings or as required by the standard specifications. Posts shall be set plumb and firm to the lines and grades shown on the plans. Backfilling shall be thoroughly tamped.4.12.4 MEASUREMENT/BASIS OF PAYMENTThe quantities measured as arranged above shall be paid for at the contract unit price of the pay item that is contained within the Bill of Quantities. Payment shall be the reimbursement for all materials, labor, equipment, tools, and incidentals necessary to complete the work prescribed in this item.

ITEM 4.13CONCRETING WORKS FOR PERIMETER WALL(Same as Item 2.10)