Technical Exhibit AC Div 35 Waterway.pdf

SLUICE GATES, SELF CONTAINED 352016.26 - 1

SECTION 352016.26 – SLUICE GATES, SELF CONTAINED

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and General Provisions of the Contract, including General and Supplementary Condition and Division 01 Specification Sections, apply to this Section.

1.2 GENERAL

A. This section covers all sluice gates required on this project. Each sluice gate will be furnished and installed complete with wall thimble, operating stem, operating floorstand, and other appurtenances or accessories as specified.

B. The sluice gates will be in the quantities and sizes indicated on the plans and listed in the Gate schedule elsewhere in the specifications. The sluice gates will be as manufactured by Rodney Hunt Company. Fabricated stainless steel gates are not acceptable.

C. Liberal safety factors will be used in the design of all equipment. Working stresses will not exceed the lower value of: one third of the yield strength or one fifth of the ultimate strength of the material. The sluice gates and appurtenances will be designed for installation in the structures shown on the plans.

D. All work will be performed in accordance with the best modern practice for the manufacture of high-grade machinery. All parts will have accurately machined mounting and bearing surfaces so that they can be assembled without fitting, chipping, or remachining. All parts will conform accurately to the design dimensions and will be free of all defects in workmanship or material that will impair their service. The sluice gates will be completely shop assembled to insure proper fit and adjustment of all parts.

PART 2 - PRODUCTS

2.1 MATERIALS

A. All materials used in construction of the gates and appurtenances will be the best suited for the application and will conform to the following specifications:

Part ASTM Designation

Iron castings for wall thimbles, frame, disc and guides, stem guides, floorstands, and other items A-126, Class-B

SLUICE GATES, SELF CONTAINED 352016.26 - 2

Bronze castings for wedges, thrust nut, lift nut, and coupling B-584, C86500

Bronze for seat facings in frame and disc B-21, C46400

Bronze tongue and guide liners B98, C65500

Stainless steel for stems A-276, Type 304

Stainless steel for fasteners A-276, Type 304

2.2 SLUICE GATES

A. Sluice gates will be cast iron, fully bronze mounted, and will have side wedges for seating head conditions and side, top, and bottom wedges for unseating head conditions when the width of the gate exceeds 24". All gate components will be designed to safely withstand the heads specified.

B. The frame will be of cast iron, one-piece construction with mounting flange and rectangular or circular opening as indicated on the plans. All contact surfaces of the frame will be machined.

The frame will have machined dovetailed grooves on the front face into which bronze seat facings shall be driven and machined to a 63 micro-inch finish. The back of the frame will be machined to bolt directly to the machined face of a wall thimble, pipe flange, or for mounting on the concrete. Frames for sluice gates, greater than 24 inches wide, subject to unseating heads will have integrally cast pads machined with keyways to receive top and bottom wedge seats.

C. The disc will be of cast iron, one-piece construction, rectangular with integrally cast vertical and horizontal ribs. A reinforcing rib along each side will be provided to insure rigidity between the side wedges. The disc will have machined dovetailed grooves on the seating face into which bronze seat facings shall be driven and machined to a 63 micro-inch finish. A tongue on each side, extending the full length of the disc, will be machined on all sides with a 1/16 inch clearance maintained between the disc tongue and gate guide groove. Wedge pads for side, top, and bottom wedges, when required, will be cast integrally on the disc and machined to receive adjustable bronze wedges. A heavily reinforced nut pocket will be cast integrally on the vertical centerline and above the horizontal center, and be of such shape to receive the square-backed thrust nut.

D. The guides will be cast iron, one-piece, designed to withstand the total thrust due to water pressure and the wedging action. The guides will be machined on all contact surfaces, and a groove will be machined the entire length of the guide to allow 1/16 inch clearance between the disc tongue and guide groove. The guides will be of such length as to retain and support at least one half the disc in the full open position. The guides will be integrally cast with or attached to the frame with silicon bronze or stainless steel studs and nuts, and will be dowelled to prevent any relative motion between the guides and frame. On sluice gates over 48 inches wide, a reinforcing rib extending from the guide flange over the top of the wedge seat will be provided.

Bronze wedge seats will be securely attached to machined pads on the guides.

SLUICE GATES, SELF CONTAINED 352016.26 - 3

E. The wedges will be solid cast bronze, machined on all contact surfaces. They will be attached to the disc with studs and nuts and will have adjusting screws with lock nuts.

F. All seat facings will be malleable extruded bronze of a composition which will increase in wearing ability with cold working. The extruded seat facings will be of special shape to fill and permanently lock in the machined dovetailed grooves when driven into place. Attaching pins and screws will not be allowed. The installed seat facings will be machined to a 63 micro-inch finish or better.

G. Wall thimbles will be furnished for all sluice gates that are not attached to pipe flanges. Wall thimbles will be Bell End, or Mechanical Joint. The depth will be as indicated on the plans and listed in the Gate Schedule. They will be cast iron, one-piece construction of adequate section to withstand all operational and reasonable installation stresses. Wall thimbles will be internally braced during concrete placement. A center ring or water stop will be cast around the periphery of the thimble. The front flange will be machined and have tapped holes for the sluice gate attaching studs, and metal stamped vertical centerlines with the word "top" for correct alignment. Large rectangular wall thimbles will be provided with holes in the invert to allow air to escape during concrete placement beneath the thimble. A permanent gasket for uniform thickness or suitable mastic will be provided between the sluice gate and wall thimble.

H. The operating stem will be of a size to safely withstand, without buckling or permanent distortion, the stresses induced by normal operating forces. In addition, the stem will be designed to transmit in compression at least 2-1/2 times the rated output of the floorstand or benchstand with a 40 pound effort on the crank or handwheel. The threaded portion of the stem will have machine cut threads of the 29 degrees Acme type. Stems of more than one section will be joined by bronze couplings threaded and keyed to the stems. All threaded and keyed couplings of the same size will be interchangeable. Manually operated, rising stem gates will be provided with an adjustable stop collar on the stem above the floorstand lift nut.

I. Stem guides will be cast iron, bronze bushed, mounted on cast iron brackets. They will be adjustable in two directions and will be spaced at sufficient intervals to adequately support the stem. Stem guide spacing will not exceed and L/r ratio of 200, and will not be spaced greater than 10 feet except where required by gate travel.

J. Manual operation will be by handwheel, crank operated floorstand, or benchstand as indicated on the plans and specified in the Gate Schedule.

K. Handwheel operated type will be without gear reduction and crank operated type will have either single or double gear reduction depending upon the lifting capacity required. Each type will be provided with a threaded cast bronze lift nut to engage the operating stem. Roller bearings will be provided above and below a flange on the operating nut to support both opening and closing thrusts.

L. Floorstands or benchstands will operate the gates under the specified operating head with not greater than a 40 pound pull on the crank or handwheel. Gears, where required, will be steel with machine-cut teeth designed for smooth operation. The stainless steel pinion shafts on crank operated floorstands, whether single or double ratio, shall be supported on tapered roller bearings or needle bearings. All components will be totally enclosed in a cast iron case and cover. Positive mechanical seals will be provided on the operating nut, and the pinion shaft is to exclude moisture and dirt and prevent leakage of lubricant out of the hoist. Lubricating

SLUICE GATES, SELF CONTAINED 352016.26 - 4

fittings will be provided for the lubrication of all gears and bearings. Removable handwheel or crank will be designed for rough treatment and minimum weight.

M. Floorstands will include a high strength pedestal designed to position the input, shaft, or handwheel approximately 36" above the operating floor. Benchstands will be provided with a rectangular cast iron base machined and drilled for mounting purposes. An arrow with the word "open" will be permanently attached or cast on the floorstand, benchstand, or handwheel indicating the direction of rotation to open the gate. The operating mechanism will be equal in all respects to the floorstand or bench-stand shown the plans and listed in the Gate Schedule.

N. The gate manufacturer shall be responsible for shop prime and finish painting of all gates and appurtenances supplied under this contract. All coatings shall conform with VOC Emission Regulations in effect at the manufacturing location and at project site to allow touch-up or recoating to be performed with the same products. The type of paint shall be as specified in the following schedule. Where required by application, the coating shall be approved for contact with drinking water by the NSF, EPA, or other appropriate governing agencies. Number of coats, mil thickness, and surface preparation shall be in accordance with the paint manufacturer's recommendations for that application, but in no case shall be less than the requirements in the following schedule. All coatings shall be free of carcinogens as listed on the IARC monographs.

O. Colors are to be manufacturer’s standards, provided they are selected for ease of field touch-up, color match, and are fade resistant. Colors shall be selected to provide contrast between the product and prime coat, and between the prime coat and finish coat, to insure uniform covering and coating thickness. All coatings shall be applied in accordance with the paint manufacturer's recommendations for thinning, technique, and safety precautions.

P. The sluice gates will be substantially watertight under design head conditions. The leakage will not exceed 0.1 gpm per foot of periphery for seating heads up to 50 feet, and for unseating heads up to 30 feet.

Q. The completely assembled gate will be shop inspected for proper seating. Seat facings will be machined and wedges adjusted to exclude a 0.004" thickness gauge between the frame and disc seating surfaces. The gate disc will be fully opened and closed in its guide system to insure that it operates freely. Floorstands and benchstands will be shop operated to insure proper assembly and operation.

2.3 INSTALLATION AND STORAGE

A. The sluice gate equipment and appurtenances will be installed in accordance with the Installation Manual furnished by the gate manufacturer. Extreme care should be used in the handling, storage, and installation of this equipment to prevent damage or distortion of the equipment and to insure proper performance.

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2.4 FLUSH BOTTOM CLOSURE

A. The flush bottom closure type of gate will have a compressible resilient seal attached to the bottom of the disc (sliding member) with a stainless steel bar and fasteners. The seal will be of a specially extruded shape, and designed to accurately fit to the bottom rib of the disc. The seal will be shaped to produce a wide sealing area on a machined cast iron stop bar that is bolted to the gate frame to form a flush invert. The differential sealing pressure of the resilient seal on the stop bar will be variable by adjustment of the side wedges on the gate.

B. The self-contained sluice gate will have extended side guides to allow the gate to fully open.

The heavily designed cast iron or structural steel yoke, attached to machined pads on the side/guides, will have a machined bearing surface for the stem thrust collar or a mounting plate for the operator. The gate operating thrust will be transferred to the yoke by the stem thrust collar or operator. The threaded operating stem will be bronze or stainless steel and furnished as part of the sluice gate assembly.

C. Large self-contained sluice gates or self-contained sluice gates with extreme operating thrust will be arranged for rising stem operation. Operation will be by handwheel, crank, or motor operated benchstand. Small self-contained sluice gates will be arranged for non-rising stem and operation by handwheel, T-handle wrench, floorstand, or benchstand. A bronze thrust nut in a nut pocket at the top of the disc shall engage in the stem threads and open and close the gate disc as it travels up or down the operating stem. The stem will not project into the clear opening of the sluice gate. When the operating floor is above the self-contained sluice gate, a cold rolled carbon steel or stainless steel extension stem coupled to the operating stem will be provided.

Operation will be by T-handle wrench and a 2 inch square operating nut located in a cast iron floorbox with cover, or by a floorstand.

PART 3 - EXECUTION

3.1 EQUIIPMENT

A. The sluice gate equipment and appurtenances will be installed in accordance with the Installation Manual furnished by the gate manufacturer. Extreme care should be used in the handling, storage, and installation of this equipment to prevent damage or distortion of the equipment and to insure proper performance.

END OF SECTION 352016.26

SECTION 352016.63 – CANAL GATES

A. The gates shall be self-contained with yoke mounted bench stand operators with rising stem, or self-contained with either non-rising stem extension (NRE) or rising stem extension (RSE), or with separate stem guides and operators, in accordance with the requirements of these specifications. Specific gate design and configuration shall be as noted in gate schedule and/or shown on plans.

A. The frame and cover (slide) shall be cast iron with machined seating faces. Seating surfaces of both frame and cover shall be assembled so that maximum clearance between seating faces shall be .004 when in fully closed and wedged position. The frame shall be flatback or spigotback, or other special mounting configuration as specified herein or shown on plans. Grooves shall be cast on the vertical sides of the cover to match guide angles. The cover shall be of domed design to withstand maximum seating head as specified below:

Gate Size Max.

6" - 24"

Seating Head (Ft.)

30" - 36" 11

42" - 48" 9

54" - 72" 6

B. The guide rails and head rails shall be minimum 1/4-inch thick structural steel, designed and built to withstand the total thrust of the gate slide due to water pressure and wedge action. There shall be one adjustable cast iron wedge per side, located on the horizontal centerline of the gate.

The cover wedge shall be integrally cast with the cover, while the other half of the wedging system shall be attached to the guide rail with two bolts. The wedges shall have smooth bearing surfaces and shall be adjustable to insure effective contact between gate seating surfaces.

CANAL GATES 352016.63 - 1

C. The stem shall be cold finished steel of suitable length and ample strength for the intended service. The stem diameter shall be capable of withstanding twice the rated output of the operator at 40 pound pull, and shall be supported such that the L/r ratio for the unsupported part of the stem shall not exceed 200. When rising stem extension is used, the stem extension shall be supported such that a rigid installation shall be provided. Stem guides shall be spaced that the L/r ratio of the stem does not exceed 200.

D. Manual operated lifting mechanisms shall be as indicated on the plan drawings or in the gate schedule. Handwheel type lifts shall have threaded bronze lift nut to match stem. Threads shall be machine cut, acme type, and right hand unless otherwise specified. An arrow shall be cast on the handwheel to indicate the direction of rotation to open the gate. A maximum effort of 40 pounds shall be required to operate the gate after it is unseated, based on the maximum specified head. The canal gates shall be Waterman Model C-10 or approved equal.

E. Component Materials

1. Frame, Cover (Slide), Handwheel - Cast Iron - ASTM A=126; Class B

2. Rails and Yoke - Structural Steel - ASTM 1-36 Stem - Leaded Cold Rolled Steel - ASTM

A-108, Type 12L14

3. Lift Nut - Bronze - ASTM B-584, Alloy 844 or 865

4. Assembly Hardware and Fasteners - Galvanized per ASTM A-153 Paint - Manufacturer's

Standard

3.1 DELIVERY, STORAGE AND HANDLING

A. The Contractor is responsible for handling and protection of all materials after arrival at destination.

B. Any damage must be reported immediately to the Engineer.

3.2 INSTALLATIONS

A. All parts shall be installed and adjusted by the contractor in a workmanlike manner. The manufacturer shall furnish necessary drawings and detailed installation, operation and maintenance instructions for all components. It shall be the contractor’s responsibility to handle, store, and install all parts and adjust switches and controls in accordance with the manufacturer’s detailed written recommendations. Stem threads shall be lubricated prior to operation of the gate.

B. Cleaning and coating shall be performed at the manufacturer’s plant. Rust, mill scale, dirt and grease shall be removed by commercial blast cleaning (SSPC SP-10) method. Paint shall be manufacturer’s standard or in accordance with paint specifications in the paint section.

CANAL GATES 352016.63 - 2

C. After installation and before the gates are put into operation, a leakage test shall be performed on all slide gates in accordance with AWWA C560. Excess leakage shall be reduced to this maximum by adjusting the gate and its wedges.

END OF SECTION 352016

CANAL GATES 352016.63 - 3

HYDRAULIC GATES 352016.66 - 1

SECTION 352016.66 – HYDRAULIC GATES

1.2 SUBMITTALS

A. Submit product literature that includes information on the performance and operation of the valve, materials of construction, dimensions and weights, elastomer characteristics, and pressure rating.

B. Upon request, provide shop drawings that clearly identify the valve dimensions including all supplied accessories.

1.3 QUALITY ASSURANCE

A. Supplier shall have at least ten (10) years experience in the manufacturer of knife gate valves utilizing elastomer cartridge seats, and shall provide references and a list of installations upon request.

2.1 KNIFE GATE VALVES

A. Knife Gate Valves shall be bonnetless, wafer type made with a cast iron body, with several support ribs for a strong, flanged connection. All sizes shall have a fabricated stainless steel liner.

B. Standard flange holes are drilled and tapped. Through bolted flanges are also available, except in the chest area where the holes are drilled and tapped. Flange drilling dimensions meet MSS SP-81 and ANSI B16.5, Class 125/150 Requirements.

C. The Series “G” has raised face flanges and meets MSS SD-81 face-to-face dimensions. Valve shall have all wetted parts of 304 or 316 Stainless Steel. Stainless Steel liner shall extend through the valve chest to the top of the packing gland. Both sides of the gate shall be finished ground. The stem shall be Stainless Steel and shall have double pitch threads. The yoke nut shall be acid-resistant bronze. The valve shall have a raised set with a relieved area around the seat to prevent jamming.

HYDRAULIC GATES 352016.66 - 2

D. The valve gate shall be suitable for 150 psi pressure differential. Packing gland shall have three layers of fiber packing with a fourth elastomer seal. Valve shall have a round port with a replaceable resilient seat interlocked by a metal retaining ring. The metal ring shall act as a wiper blade to clean the gate before it passes over the seat. The resilient seat shall be captured and locked in place on three sides only exposing one surface for sealing which prevents blowout.

2.2 FUNCTION

A. Rotating the handle (and therefore the threaded nut) clockwise pushes the threaded stem towards the valve body, sliding the gate downward until the opening is completely blocked.

The chamfered edge of the gate will seat against the jambs to ensure a tight seal. Rotating the handle counter clockwise pulls the gate out from between the seats, opening the valve.

3.1 INSTALLATION

A. Valve shall be installed in accordance with manufacturer’s written Installation and Operation Manual and approved submittals

3.2 MANUFACTURER’S CUSTOMER SERVICE

A. Manufacturer’s authorized representative shall be available for customer service during installation and start up, and to train personnel in the operation, maintenance and troubleshooting of the valve.

B. Manufacturer shall also make customer service available directly from the factory in addition to authorized representatives for assistance during installation and start-up, and to train personnel in the operation, maintenance and troubleshooting of the valve.

END OF SECTION 352016

ALUMINUM FLAP GATE 352016.69 - 1

SECTION 352016.69 – ALUMINUM FLAP GATE

A. The flap gate shall be designed to allow free outflow and prevent backflow for maximum seating heads of 30 feet.

A. The frame shall be aluminum of flatback, spigotback or flangeback design (or other specified design configuration as required) with seating surface inclined from vertical at a minimum of 2- 1/2 degrees to assure positive closure. The aluminum cover shall be attached to the frame in such a manner as to allow proper seating and full opening of cover. Built in stops shall be provided to prevent the cover from rotating sufficiently to become edged in the open position.

B. A resilient neoprene seal shall be attached to the inside of the frame opening and shall act as a seat for the cover to seal against. The seal shall be retained by an aluminum ring bolted to the frame.

C. The linkage system shall be of the double pivoted type, attached to fixed pivot points on cover and frame. Hinge links shall be of structural aluminum shapes. The heavily reinforced hinge arm of the Model AF-41 is fastened to the pivot lug by means of heavy stainless steel hinge pins inserted through a durable non-metallic bushing. The hinge pin is arranged in a double shear configuration at extremely close tolerances thus severely limiting lateral movement. This, in conjunction with the protruding rubber seat (in lieu of a recessed seat) insures positive seating at all times regardless of the angle of tidal action.

D. Components

1. Frame, cover and hinge link - Aluminum alloy 6061-T6

2. Fasteners Stainless Steel - ASTM F-593 and F-594 Type 304 or 316, as specified

3. Seals Neoprene Rubber - ASTM D-2000

4. Finish Mill finish on all surfaces Manufacturer's Standard

ALUMINUM FLAP GATE 352016.69 - 2

A. All parts shall be installed and adjusted by the contractor in a workmanlike manner. The manufacturer shall furnish necessary drawings and detailed installation, operation and maintenance instructions for all components. It shall be the contractor’s responsibility to handle, store, and install all parts and adjust switches and controls in accordance with the manufacturer’s detailed written recommendations.

B. Cleaning and Coating

1. Cleaning and coating shall be performed at the manufacturer’s plant. Rust, mill scale, dirt and grease shall be removed by commercial blast cleaning (SSPC SP-10) method. Paint shall be manufacturer’s standard or in accordance with paint specifications in the paint section.

C. Leakage

1. After installation and before the gates are put into operation, a leakage test shall be performed in accordance with AWWA C560. Excess leakage shall be reduced to this maximum by adjusting the gate and its wedges.

END OF SECTION 352016.69

DREDGING 352023 - 1

SECTION 352023 – DREDGING

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 DEFINITIONS

A. Hard material is defined as material requiring, blasting or the use of special equipment for economical removal, and includes boulders or fragments too large to be removed in one piece by the dredge.

1.3 SUBMITTALS

A. Shop Drawings

Submerged Pipeline

Soundings or Sweepings Indicate pipeline location and installation details. Submit drawings of surveys during progress of work by soundings or sweepings.

B. Certificates

Protection Plan Prior to blasting, submit a plan for protection of surrounding structures, equipment and vessels.

1.4 MATERIAL TO BE REMOVED

A. The material to be removed is as specified on the drawings.

1. Hard Material: The removal of hard material is not included. Should the Owner direct in writing that hard material be removed, the Work shall be performed and an adjustment in the contract price or time for completion or both, will be made in accordance with Differing Site Conditions. If hard material is to be removed, blasting may be permitted.

If approved, blasting shall be performed only by experienced persons. Conduct operations in strict accordance with applicable regulations. Protect exposed structures from the effects of the blast in accordance with the protection plan.

DREDGING 352023 - 2

1.5 ARTIFICIAL OBSTRUCTIONS

A. Except as indicated, the Owner has no knowledge of cables, pipes or other artificial obstructions or of any wrecks, wreckage, or other material that would necessitate the use of explosives or the employment of additional equipment for economical removal. If actual conditions differ from those stated or shown, or both, an adjustment in contract price or time for completion or both, will be made in accordance with Differing Site Conditions.

1.6 OVERDEPTH DREDGING

A. To cover unavoidable inaccuracies of dredging processes, material actually removed to a depth specified on the drawings below the depth specified and within the dredging limits will be measured and paid for at full contract price.

1.7 SIDE SLOPES

A. Dredging on side slopes shall follow, as closely as practicable, the lines indicated or specified.

An allowance shown on the drawings will be made for dredging beyond the indicated or specified side slopes, except as provided herein. The amount of material excavated from side slopes will be determined by either cross-sections or computer, or both.

1.8 PERMIT

A. The Contractor shall comply with conditions and requirements of the Corps of Engineers Permit and other State or Federal permits. The Owner will secure the permit for dredging and disposal of material as indicated. The Contractor shall make arrangements for disposal of excavated materials.

1.9 CHARGES

A. The Contractor will pay charges imposed for disposal of material in the approved disposal area.

1.10 ENVIRONMENTAL PROTECTION REQUIREMENTS

A. Provide and maintain during the life of the contract, environmental protective measures. Also, provide environmental protective measures required to correct conditions, such as oil spills or debris, that occur during the dredging operations. Comply with Federal, State and local regulations pertaining to water, air and noise pollution.

1.11 BASIS FOR BIDS

A. Payment will be at the contract unit price per cubic yard, multiplied by total cubic meters, cubic yards of acceptable dredging. Base bids on total cubic meters, cubic yards of dredging. Include a bid unit price per cubic yard of dredging based on the quantity specified or indicated. If the owner requires an increase or decrease in total volume of dredging, the contract price will be

DREDGING 352023 - 3

adjusted. Dredging conditions specified and indicated describe conditions which are known.

However, the Contractor is responsible for other conditions encountered which are not unusual when compared to conditions recognized in the dredging business as usual in dredging activities such as those required under this Contract.

NOT USED

3.1 INSPECTION

A. 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 Owner, boats, boatmen, laborers, and materials necessary for inspecting, supervising and surveying the Work. When required, provide transportation for the owner and inspectors to and from the disposal area and between the dredging plant and adjacent points on shore.

3.2 CONDUCT OF DREDGING WORK

A. Order of Work

1. The Owner will direct the Contractor on the order of Work. The Owner reserves the right to change the order of Work at any time.

B. Interference with Navigation

1. Minimize interference with the use of channels and passages. The Owner 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.

a. Compensation for Interruption of Operations

If dredging operations are interrupted due to the movement of vessels or floating equipment, an adjustment in the contract price or time for completion, or both, will be made as provided by the Contract.

C. Lights

1. 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.

DREDGING 352023 - 4

D. Ranges, Gages and Lines

1. 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. The Contracting Officer will furnish, upon request by the Contractor, survey lines, points and elevations necessary for the setting of ranges, gages and buoys.

E. Plant

1. Maintain the plant, scows, coamings, barges, pipelines and associated equipment to meet the requirements of the work. Promptly repair leaks or breaks along pipelines. Remove dredged material placed due to leaks and breaks.

F. Disposal of Excavated Material

1. Provide for safe transportation and disposal of dredged materials. Transport and dispose of dredged material in the approved disposal area. The Contractor may, at his option, dispose of dredge material at the approved disposal area or provide disposal at an alternate approved disposal area. The deposit of dredged materials in unauthorized places is forbidden. Comply with rules and regulations of local port and harbor governing authorities.

a. Method of Disposal

Deposit dredged material by the hydraulic process, hopper dredge, self dumping scow or barge. Do not remove loaded or partially loaded scows, barges, or hopper dredges from the dredge area until the load has been measured by the Owner.

Notify the Owner when scows or barges are returned to the dredge area.

2. Disposal in Indicated Fill Areas: In depositing excavated material for fill, uniformly grade and allow for shrinkage. Provide and maintain necessary bulkheads, dikes, ditches, weirs, spillways and other construction necessary to confine and retain the fill in the dredge fill area.

3. Operation of Sluiceways: Sluiceways on the disposal area levees will be operated and maintained by the Contractor.

4. Submerged 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.

G. Navigation Warnings

1. Furnish and maintain navigation warning signs along the pipeline.

H. Method of Communication

1. Provide a system of communication between the dredge crew and the crew at the disposal area. A portable two-way radio is acceptable.

DREDGING 352023 - 5

I. Salvaged Material

1. Anchors, chains, firearms, and other articles of value, which are brought to the surface during dredging operations, shall remain or be come the property of the Owner and shall be deposited on shore at a convenient location near the site of the Work as directed.

J. Safety of Structures

1. The prosecution of work shall ensure the stability of piers, bulkheads and other structures lying on or adjacent to the site of the Work, insofar as structures m ay be jeopardized by dredging operations. Repair damage resulting from dredging operations, insofar as such damage may be caused by variation in locations or depth of dredging, or both, from that indicated or permitted under the contract.

K. Plant Removal

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

3.3 MEASUREMENT

A. Contractor shall take soundings before and after dredging.

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 drawings re present existing conditions based on current available information, but will be verified and corrected, if necessary, by soundings taken before dredging in each locality. Soundings will be taken by lead line or sonic methods, or both, as determined by the Owner; results of sounding by either or both methods will be the basis for payment. Areas sounded more than 30 days prior to dredging will be resounded when requested by the Contractor. The Contractor has the option of being present when such soundings are made.

2. Surveys During Progress of Work: Contract depth will be determined by soundings or sweepings taken behind the dredge as work progresses. The Contractor shall take progress soundings or sweepings.

3. Monthly Estimates: Monthly estimates of work completed will be based on the result of soundings taken during the progress of the work or at the option of the Owner on 85 percent of the scow or barge measurements. Deductions will be made for dredging and disposal not in accordance with the specifications.

3.4 FINAL EXAMINATION AND ACCEPTANCE

A. As soon as practicable after the completion of areas, which in the opinion of the Contracting Officer, will not be affected by further dredging operations, each area will be examined by the Owner 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. The Contractor will be notified when soundings or sweepings are to be made and will be permitted to accompany the sounding or sweeping party and to inspect the data and methods used in

DREDGING 352023 - 6

preparing the final estimate. When areas are found to be in a satisfactory condition, the work therein will be accepted as complete. Final estimates will be subject to deductions or correction of deductions previously made because of excessive overdepth, dredging outside of authorized areas, or disposal of material in an unauthorized manner.

END OF SECTION 352023

PRECAST CONCRETE SEAWALL SYSTEM 353116.13 - 1

SECTION 353116.13 – PRECAST CONCRETE SEAWALL SYSTEM

Conditions and Division 01 Specification Sections, apply to this Section

A. The work under this section shall consist of furnishing and installing all labor and materials or components as required to install a precast concrete seawall system to include: excavation, subgrade preparation, cast-in-place concrete footing, precast concrete retaining wall system, backfill as required for the wall system, and all related work as shown on the plans.

B. The Contractor and/or Precast Concrete Seawall Supplier shall perform site visit(s) as needed prior to bid preparation to familiarize with and/or field verify the existing conditions to the extent that all incidental work required to complete the design, fabrication, and installation of the precast concrete wall system is included in the base bid.

C. The work to be provided under this Section specifically does NOT include the following:

1. Relocation of existing private boat docks

2. Relocation or demolition of exiting utilities and/or drainage facilities.

3. Demolition of the exiting seawall or surrounding sidewalks, curbing, fencing etc

4. Excavation shoring/sheet piling/cribbing etc.

5. Cofferdams and Dewatering

6. Temporary facilities, erosion protection, traffic control

D. The Precast Concrete Seawall System Supplier/Manufacturer shall provide a complete precast wall system with elements designed and fabricated to suit this project application with considerations for long-term durability under the tidal salt-water marine exposure conditions of this site. The Precast Concrete Seawall System shall be designed and constructed such that the stability of the seawall will not be jeopardized by buoyancy effects of tidal water higher than normally anticipated conditions.

E. The Seawall footing shall be sized and designed by the seawall supplier to suit the specific precast wall system being proposed. Geotechnical information for the manufacturer’s design qualification of the precast retaining wall system components and configuration will be provided by the Owner.

F. The Precast Concrete Seawall System shall include all design provisions, coordination, and adjustments as needed during fabrication or field installation for special localized conditions and related construction as shown on the General Plan. These provisions include, but are not limited to, design and installation of localized modifications or reinforcement of the precast wall

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panels (if required), and storm water drainage system piping penetrations through the wall which shall be sealed watertight such that migration in either direction of seawater or backfill fines through the penetration is physically prevented.

G. The Precast Concrete Seawall System shall include all design provisions, coordination, and adjustments as needed during fabrication or field installation to facilitate the uniform thickness and consistent appearance of the seawall capslab, which may include special casting or cutting of the top to suit changing grade conditions. Contractor shall include provisions for adjustments to the configuration of the bottom side of the cast-in-place capslab to provide an interlocking transition between the capslab and the precast concrete wall units in the base bid.

A. Unless otherwise modified in this specification or the plans, all work, materials, submittals, and certifications shall conform to the requirements of the pertinent CalTrans Standard Specifications (latest edition). Any materials required for the completion of all work and not addressed in the specifications, construction drawings, or standard specifications shall be in accordance with best industry standards and practices, for which all pertinent product data shall be submitted to the site engineer for approval prior to procurement of the subject materials.

B. The Precast Concrete Seawall System shall be a comprehensive system as designed by the manufacturer’s representative(s) and furnished and installed in accordance with all of the manufacturer’s recommendations for this site and application. Precast concrete wall units shall be fabricated using the following materials, unless approved otherwise: 2.2.1 Precast Concrete shall have a minimum compressive strength of 4000 psi.

C. In order to extend the precast concrete’s service life for the tidal saltwater marine exposure of this project, all concrete for precast concrete wall elements shall contain a waterproofing and corrosion protection chemical admixture for permeability reduction providing increased durability and chloride ion corrosion resistance.

D. In order to provide uniform wall color appearance, all concrete for the precast concrete wall elements shall be integrally colored using a powdered or liquid pigment specifically recommended by the pigment manufacturer for use in precast concrete. The faces of the precast concrete wall elements shall also be sealed with a concrete cure/sealer compound as recommended by, and of the same manufacture as, the concrete pigment. Concrete pigment color shall be as selected by the owner from the pigment manufacturer’s available colors.

Contractor shall submit all pigment and sealer product data and color selection information to the owner for approval as soon as available, and provide up to 2 weeks for owner reviews and selection. Subsequent to color selection, a precast concrete color sample shall be prepared and delivered to the owner for approval. The contractor, at no expense to the owner, shall correct any distinctive color shade variations within the final seawall installation as directed by the owner.

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E. The Contractor shall provide advance product data submittals for the proposed Precast Concrete Wall System with a 24”x36” photographic or computer-simulated graphic representation of the finished appearance of the owner-approved architectural wall face pattern and color, prior to wall unit fabrication. A mock-up panel of the selected precast wall face is NOT required.

F. Reinforcing steel shall have minimum yield strength of 60,000 psi. All reinforcing steel shall be either, epoxy coated or hot-dipped galvanized in accordance with ASTM A641, at the precast concrete wall system manufacturer’s option. Reinforcing steel shall be installed with a minimum cover of 2”. Welded wire reinforcement (WWR) shall be epoxy coated in accordance with ASTM A884 or hot-dipped galvanized in accordance with ASTM A641, and shall be fabricated and installed in accordance with the Manual of Standard Practice for Structural Welded Wire Reinforcement (latest edition) as published by the Wire Reinforcement Institute (WRI). The contractor shall indicate the type of reinforcing steel corrosion protection included in the base bid in the bid submittal.

G. All horizontal and vertical joints in the precast concrete wall system shall be sealed watertight such that migration in either direction of seawater or backfill fines through the joints is physically prevented even if wall elements were to shift due to small thermal movements.

Mastic or other appropriate joint filler material shall be installed between the wall elements, and geotextile/filter fabric shall be installed behind the wall element joints. Joint filler materials shall be as specified and as detailed by the wall system manufacturer for their system. The contractor at no cost to the owner shall replace joints exhibiting signs of, or potential for, backfill migration.

H. The Precast Concrete Seawall System shall include adequate groundwater weep drains to allow groundwater discharge from behind the wall. Weep drains shall be schedule 80 PVC pipe with a minimum diameter of 4”, and shall be spaced at a maximum of 10 feet center to center. The weep drains shall be spaced closer as needed if the wall system components configuration creates soil compartments behind the wall that may inhibit groundwater drainage flow to the weep drains. Weep drains shall be placed such that the discharge invert elevation is 4” above finished grade sloping away from the wall face. Weep drain pipe penetrations through the precast wall elements shall be sealed watertight such that migration in either direction of seawater or backfill fines through the penetration is physically prevented by a pipe sleeve collar or other approved means. Weep drains shall have an in-line backflow prevention device. Refer to seawall design drawings for related information.

I. The Contractor shall submit shop drawings and working installation drawings for the complete wall system and precast wall units to the owner for specifications conformance review prior to fabrication.

J. All the wall elements shall be uniformly fabricated and installed using the same materials consistently from beginning to end.

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A. Unless otherwise modified, in the specifications or the plans, the performance of all work shall conform to the construction requirements of the pertinent CalTrans Standard Specifications (latest edition). Construction requirements including the fabrication, painting, transportation, and erection / installation of any components required for the completion of all work and not addressed in the special provisions, construction drawings, or CalTrans Standard Specifications (latest edition) shall be in accordance with best industry standards and practices.

B. For additional construction requirements for the precast concrete retaining wall system refer to the manufacturer’s installation manuals and all project specific recommendations that shall be provided in writing by the manufacturer’s representative, which shall be submitted, to the owner prior to the start of seawall construction.

C. All vertical and horizontal erection tolerances for the placement of the precast wall elements and joint alignments shall conform to the more restrictive requirements of either of the following, unless approved otherwise:

1. The tolerances specified in manufacturer’s standard installation manual and/or construction requirements.

2. 1/16” per foot horizontal (leveling) ; 1/16” per foot vertical (plumb) ; +/- 3/8” of alignment at adjacent joint lines, and +/- 1” of the theoretical wall face line of the top of the wall at any point along the wall. Any adjustments or corrective compensations to stay within tolerance limits shall be made in a gradual manner, such that changes in the alignment of any segmental unit or group of units are not visible.

END OF SECTION 353116.13

CONCRETE REVETMENTS 353119.18 - 1

SECTION 353119.18 – CONCRETE REVETMENTS

1.2 DEFINITIONS

A. Articulating Concrete block (ACB) Revetment System

1. A matrix of interconnected concrete block units for erosion protection. Units are connected by geometric interlock and/or cables, geotextiles, or geogrids, and typically include a geotextile underlayment for subsoil retention.

B. Blocks

1. Articulating concrete block revetment units will be referred to as blocks.

C. Interlocking Blocks

1. Each pair of abutting blocks shall have interlocking keys that limit lateral expansion. The key and keyhole shall have an interference fit such that the joint movement has a minimum aperture at closure, and a maximum aperture when pulled apart. The joint freeplay shall allow articulation of each individual block.

D. Freeplay

1. Freeplay shall be the maximum lateral joint movement for interlocking blocks (difference between maximum and minimum aperture).

A. Shop Drawings

Block Installation

Geotextile Installation

Drawings showing details of the ACB and Geotextile Installation, including the block layout patterns in relation to the feature alignment, anticipated locations of cast-in-place concrete joints, mattress junction details, soil anchors, and proposed installation methods for void filling materials.

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B. Product Data

Articulating Concrete Block

Geotextile

Descriptive technical data on the blocks, cables, cable fittings, soil anchors, and geotextile.

Include all material properties specified under paragraph PRODUCTS. Catalog cuts, technical data sheets, or test data shall be submitted showing that the products meet the specifications.

The submittal shall also include a copy of any standard manufacturer’s warranties for the products.

C. Anchors

Calculations for the anchor pullout capacity. Tabulated manufacturer’s data is acceptable, if the embedment soil conditions are applicable to the project site.

D. Test Reports

Flume Test: A report of testing for the ACB in substantial conformance with FHWA RD-89- 911, at the same time s the ACB and Geotextile Data submittal. The report shall clearly state if the critical shear stress associated with the stability threshold of the ACB system was derived from laboratory testing that included a sub-block drainage layer as a component of the tested system.

1.4 DELIVERY, STORAGE AND HANDLING

A. Check products upon delivery to assure that the proper material has been received and is undamaged. For geosynthetics, the guidelines presented in ASTM D 4873 shall be followed.

B. Blocks

Provide blocks which are sound and free of defects that would interfere with proper placement or that would impair the strength or longevity of the installation. Discard blocks with the following defects:

1. Broken appendages

2. Chips larger than 2 inches in any dimensions

3. Cracks wider than 0.02 inches and longer than 33 percent of the nominal height. Minor cracks, incidental to the usual method of manufacturer, or chipping that result from customary methods of handling in shipping, delivery and placement will not be deemed grounds for rejection. Store blocks in a suitable location away from mud, paint, wet cement, and other contamination or disturbance.

C. Geotextiles

Labeling: Label each roll with the manufacturer’s name, product identification, roll dimensions, lot number, and date manufactured.

CONCRETE REVETMENTS 353119.18 - 3

D. Handling

Geosynthetic rolls shall be handled and unloaded by hand, or with load carrying straps, a fork lift with a stinger bar, or an axial bar assembly. Geosynthetic rolls shall not be dragged, lifted by one end, lifted by cables or chains, or dropped to the ground.

E. Storage

Protect geotextiles from cement, paint, excessive mud, chemicals, sparks and flames, temperatures in excess of 160 degrees F, and any other…