Specifications_35_23_11_0003.pdf

Warren H. Brock Reservoir Gates Replacement Colorado River Front Work and Levee System Project, California Solicitation No.

Slide Gates and Actuators

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SECTION 35 23 11

SLIDE GATES AND ACTUATORS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. 10-foot by 7-foot Slide Gates and Actuators:

1. Payment: Lump-sum price offered in Price Schedule A. Includes:

a. Removal and disposal of two existing 10-foot by 7-foot cast iron slide gates, actuators, and appurtenant parts.

b. Furnishing, installing, testing, and training associated with two new 10-foot by 7-foot stainless steel slide gates, actuators, and appurtenant parts.

c. Concrete removal at gate sill.

B. 10-foot by 10-foot Slide Gates and Actuators:

1. Payment: Lump-sum price offered in Price Schedule A. Includes:

a. Removal and disposal of six existing 10-foot by 10-foot cast iron slide gates, actuators, and appurtenant parts.

b. Furnishing, installing, testing, and training associated with six new 10-foot by 10-foot stainless steel slide gates, actuators, and appurtenant parts.

c. Concrete removal at gate sill.

C. 10-foot by 10-foot Slide Gates and Actuators – Optional:

1. Measurement: Number of gates installed

2. Payment: Unit price offered in Price Schedule B. Includes

a. Removal and disposal of three existing 10-foot by 10-foot cast iron slide gates, actuators, and appurtenant parts.

b. Furnishing, installing, testing, and training associated with three new 10-foot by 10-foot stainless steel slide gates, actuators, and appurtenant parts.

c. Concrete removal at gate sill.

1.02 DEFINITIONS

A. Gate actuator: Motor-operated gate lift with manual override.

B. Seating and unseating design heads: Vertical distance from center of gate opening to maximum water surface.

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1.03 REFERENCES

A. American Society of Mechanical Engineer (ASME)

1. ASME B17.1-1967(R2013) Keys and Keyseats

B. ASTM International (ASTM)

1. ASTM A240/A240M-25a Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and General Applications

2. ASTM A276/A276M-25 Stainless Steel Bars and Shapes

3. ASTM A967/A967M-25 Chemical Passivation Treatments for Stainless Steel Parts

4. ASTM D4020-18 Ultra-High-Molecular-Weight Polyethylene Molding and Extrusion Materials

5. ASTM F593-24 Stainless Steel Bolts, Hex Cap Screws, and Studs

6. ASTM F594-24 Stainless Steel Nuts

C. American Water Work Association (AWWA)

1. AWWA C542-16(R21) Electric Motor Actuators for Valves and Slide Gates

2. AWWA C561-21 Fabricated Stainless Steel Slide Gates

D. Bureau of Reclamation (USBR)

1. USBR M-47 Guide to Concrete Repair, 2015

E. National Electrical Manufacturers Association (NEMA)

1. NEMA 250-21 Enclosures for Electrical Equipment (1,000 Volts Maximum)

2. NEMA ICS 5-2017 Industrial Control and Systems: Control Circuit and Pilot Devices

3. NEMA MG 1-2024 Motors and Generators

1.04 SUBMITTALS

A. In accordance with Sections 01 33 00 – Submittals, 01 33 26 – Electrical Drawings and Data, and 01 78 30 – Project Record Documents.

B. RSN 35 23 11-1, Approval Data:

1. Manufacturer’s product data in accordance with AWWA C542, and AWWA C561.

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2. Motor data:

a. Motor running amps.

b. Locked rotor torque: Foot-pounds.

c. Full load torque: Foot-pounds.

d. Horsepower rating.

e. Voltage rating.

f. Locked rotor current: Amperes.

g. Full load current: Amperes.

h. Duty rating.

3. Complete system wiring diagrams for motor-operated gate actuators.

4. Actuator sizing calculations, including conditions of operation, maximum loading, friction factors, stem factors, gear box (if applicable), and run time.

5. Stem calculations, including stem factors, and loading.

6. Data on anti-seizing compound.

7. Wall bracket sizing, material selection, and coating.

8. Product data on all commercially available products.

9. Installation and adjustment procedures for all gates and actuators.

C. RSN 35 23 11-2, Approval Drawings:

1. General assembly, principal dimensions, materials and type of slide gates, actuators, anchor bolts, stem guides, pedestal, gear box (if applicable), and wall brackets.

2. Location, dimensions, and load bearing capacity required for supports anchored to concrete.

3. Principal dimensions necessary for interfacing with the gates, general construction, and incoming power supply and control lines.

4. Mounting details of the slide gates to the existing cast iron thimble.

D. RSN 35 23 11-3, Shop Assembly and Testing Results:

1. Shop gate test results for all slide gates.

2. Shop actuator proof-of-design testing results for all actuators.

E. RSN 35 23 11-4, Final Data:

1. Operation and maintenance manuals for gates and actuators.

2. List of special tools and spare parts for gates and actuators:

a. Spare parts furnished.

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b. Tools, appliances, handling devices, and templates furnished.

3. Certificates and test reports:

a. Gate manufacturer statement that field testing was conducted in the presence of and signed by the COR and requirements were successfully met.

b. Field testing results.

1.05 DESIGN REQUIREMENTS

A. Design, furnish, and install gates as shown on the drawings. Gate types, sizes, locations, quantities, actuator types, design heads, and other details are listed on drawings.

B. Where pre-stressing of bolts or studs is required, the minimum pre-stress to result in not less than 125 percent of the force required to prevent separation of the joint, and the combined stress to not exceed 50 percent of the minimum yield strength of the material.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Gate assembly and actuators shall be shipped in accordance with AWWA C542, AWWA C561, and manufacturer’s recommendations.

B. Gate Assemblies and Actuators:

1. Supported in wooden crates. Supports shall be wood block or fabricated wood supports.

2. No carbon steel packing supports or tie downs shall be used in contact with any stainless-steel components.

C. Secure movable parts to prevent loss or damage by vibration or rough handling.

D. Protect fragile parts from damage during shipping.

E. Parts and electrical components that are susceptible to moisture and condensation shall be tightly sealed, for storage, to prevent rusting and damage.

F. Notify COR 48 hours prior to each delivery of materials or equipment.

G. If delivery of materials or equipment prior to scheduled installation is necessary, provide protective storage and protect materials and equipment from damage or deterioration.

H. Prevent contact between stainless steel components and carbon steel. If contact does occur, re-passivate the effected stainless steel areas in accordance with ASTM A967 prior to final acceptance.

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1.07 EXTRA MATERIALS

A. Special Tools: Furnish special tools and wrenches of unusual pattern not usually furnished in a mechanic tool set that are necessary for installation, assembly, disassembly, and maintenance of the gate assemblies.

B. Spare Parts:

1. Spare parts shall be interchangeable with and shall be made of the same material as the corresponding part to be replaced.

2. Spare parts shall be boxed and protected against deterioration in storage. Each box of spare parts shall be clearly marked on four sides with complete identification of contents.

3. Provide one additional actuator lift nut (also known as actuator drive sleeve, stem lift nut, or actuator output sleeves) for each gate actuator, for a total of 11 spare lift nuts. Each lift nut shall be internally threaded to match the gate stem and compatible with the actuator assembly.

PART 2 PRODUCTS

2.01 FABRICATED SLIDE GATES

A. Stainless steel slide gates in accordance with AWWA C561 except as specified herein:

1. Designed for 20-feet of seating and unseating head to gate centerline.

2. Material: Stainless Steel in accordance with AWWA C561, type 316L.

3. Slide gate closure type as shown or listed on the drawings.

4. Slide gate shall be operated and mounted as shown on drawings.

5. Frame:

a. Self-contained frame.

b. Slide gate frame shall have flange for bolting to concrete.

c. Suitable for mounting to existing cast iron thimble as detailed in the drawings.

1) Fasteners connecting the gate frame to the existing cast iron thimble may be installed using existing tapped holes, or by drilling and tapping new holes into the thimble, as recommended by gate manufacturer.

2) Gate frame shall be supplied undrilled to allow for field verification of existing thimble hole locations and to perform non-destructive testing to locate embedded reinforcement prior to drilling anchors into existing concrete.

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3) Provide isolation gasket or mastic between stainless steel gate frame and cast iron thimble.

d. Seating Faces: UHMW polyethylene in accordance with ASTM D4020.

e. Flush bottom.

f. Raised surfaces: Only as necessary for attaching seats.

g. No sharp or abrupt intrusions into the flow when gate leaf is in the open position.

6. Yoke:

a. Symmetric design to prevent twisting of the yoke under actuator load.

b. Connect yoke to the frame guides to fully transmit maximum gate actuator load from the yoke into the guides and into the structure without high localized stresses exceeding allowable material stresses.

c. Provide suitable gate actuator mounting pad.

d. Design yoke and connections to allow removal of the gate actuator and gate leaf.

7. Provide flush-bottom seal in accordance with AWWA C561 or as detailed in the drawings.

8. Parts subject to periodic replacement shall be readily accessible with a minimum dismantling of the equipment.

9. Leakage:

a. Not to exceed 0.1 gpm per foot of gate periphery under seating conditions.

b. Under unseating conditions, leakage not to exceed 0.2 gpm per foot of gate periphery.

10. Passivate stainless steel components in accordance with ASTM A967.

11. Coatings of any carbon steel components associated with the gates in accordance with Section 09 96 20 – Coatings.

2.02 STEM

A. Material: Stainless Steel ASTM A276, type 316L.

B. Slide gate stem in accordance with AWWA C561 except as specified herein:

1. Supplied by the gate manufacturer.

2. No portion of stem shall have cross-sectional area smaller than root area of threaded portion of stem.

C. Stem calculations shall demonstrate:

1. Unsupported stem length shall not be greater than 200 times the radius of gyration of the stem.

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2. Root diameter of the threads shall be used to calculate the radius of gyration and area for the threaded parts.

2.03 STEM PROTECTION HARD COVER:

A. Designed cover to protect threaded portion of stem below frame yoke but above gate normal travel.

B. Shall not impede gate operation.

C. Designed to allow access to stem for inspection and maintenance. See conceptual design in Drawings.

D. Material: ASTM A276 or ASTM A240, type 316L Stainless Steel

2.04 STEM BELLOWS

A. Supplied by gate manufacturer.

B. Stem bellows to protect the exposed threaded portion of the stem below the gate actuator in all gate positions.

C. UV resistant material.

2.05 STEM GUIDES

A. Design stem in accordance with AWWA C561.

B. Design each guide bushing and its retainer so that it can be replaced without removing the stem, gate, or gate actuator.

C. Coatings in accordance with Section 09 96 20 – Coatings.

2.06 STEM COUPLINGS

A. Material: Stainless steel in accordance with AWWA C561.

B. Stem couplings shall be threaded and keyed or pinned at both ends to engage the end of the stem sections forming the joint.

C. Keys and keyways in accordance with ASME B17.1.

2.07 MOTOR-OPERATED GATE ACTUATOR

A. Manufactured by Rotork Controls, http://www.rotork.com, having the following essential characteristics:

1. Design in accordance with AWWA C542.

2. Design in accordance with AWWA C561.

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3. Supplied by the gate manufacturer.

4. Actuator Enclosure:

a. Double O-ring sealed.

b. At a minimum watertight to NEMA 250, Type 6.

c. Removal of the terminal cover shall not change the actuator NEMA ratings.

d. Breathers and drains are not permitted.

5. Torque Sensing Mechanism:

a. Integral part of motor operator.

b. Protect gate and actuator in both opening and closing directions.

c. Torque sensing:

1) Torque limitation shall be adjustable without removing any actuator covers.

2) Torque sensing shall be from direct measurement of force at the output of the actuator, governed by a solid-state torque sensor that directly measures the output torque of the actuator or data derived from the motor speed, voltage, and temperature fluctuations.

3) Methods of determining torque using mechanical torque switches is not acceptable.

4) Adjustable settings and independent adjustment for opening and closing directions.

d. Contacts rating designation: NEMA ICS 5 A600.

6. Limit Position Sensing Mechanism:

a. Limit position sensing and associated gearing:

1) Integral part of motor operator.

2) Measured via a solid-state absolute encoder device that eliminates the use of counting gear trains or potentiometers.

b. Position limits shall be adjustable without removing any actuator covers.

c. Position measurement shall be contactless.

d. Position setting range shall be at a minimum 2.5 to 8000 turns of the actuator with resolution to 7.5 degree of actuator output.

e. Absolute encoder shall be capable of maintaining position measurement during power outages without need for backup power source.

f. A monitor relay shall be provided as standard, which can be used to indicate actuator available for remote operation.

g. Contacts shall be rated for 5mA to 5A, 120V AC, 30V DC.

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h. Four separate contacts shall be provided, which can be selected to indicate any position of the gate.

i. Provide at least four additional independent contacts, set to function in accordance with:

1) Electrically independent contacts: Close at fully open position.

2) Electrically independent contacts: Open at fully open position.

3) Electrically independent contacts: Close at fully closed position.

4) Electrically independent contacts: Open at fully closed position.

j. Provision made for the selection of a normally closed or open contact form.

k. Contacts shall operate when external power to the actuator is lost.

7. When sizing the actuator, use 0.30 as a gate sliding coefficient of friction.

8. Gate designed for seating and unseating heads as listed on the drawings.

9. Operating Speed: 12 8 inches per minute plus or minus 10 percent.

10. Handwheel and declutching mechanism:

a. Handwheel for emergency and manual operation.

b. Motor drive shall be restored automatically by starting the motor.

c. Hand auto lever shall be padlockable in at least the automatic position.

d. Possible to select hand operation while the actuator is running without damage to the drive train.

e. Handwheel drive shall be mechanically independent of the motor drive, and any gearing shall permit emergency manual operation in a reasonable time.

f. Raised markings on the handwheel showing rotation to open or close the gate.

g. Handwheel maximum rim force of 40 pounds when raising or lowering the gate under maximum load.

11. Enclose gears in a housing.

12. Stem Nut and Lifting Nut: Bronze, AWWA C561.

13. Position Potentiometer Measurement Divisions: Feet, inches, and tenths of an inch or percent open.

14. Stem Cover:

a. Design in accordance with AWWA C561.

b. Aluminum.

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15. Local Controls:

a. Control knob or buttons for OPEN and CLOSE operation.

b. Control knob for LOCAL, OFF, and REMOTE operation.

c. LED type pilot lights shall indicate gate OPEN, gate CLOSED, and gate in mid-travel (both lights illuminated), minimum.

16. Digital Control Module (DCM):

a. Provide each gate actuator with DCM to allow for remote monitoring and control of the actuator.

b. Microprocessor based electronics with control software stored in non-volatile electrically erasable programmable read-only memory

(EEPROM).

c. Two serial communication ports, minimum.

d. Built in transient and lightning protection.

e. Perform self-diagnostics.

f. Control signal of 4-20mA current loop.

17. Communication Protocol: Modbus RTU.

18. Printed circuit card interconnects have gold-plated or standard connectors.

19. Self-locking, a rated running torque equal to 20 percent of motor starting torque at a rated running time of 15 minutes continuous, without exceeding allowable NEMA temperature rise for insulation class used.

20. Motor:

a. Motor protection using a thermostat embedded in the motor end windings.

b. Lost phase protection shall be incorporated into the design.

c. Induction type.

d. Rated: 480 volts, 3-phase, 60 hertz.

e. Designed for required service:

1) For ON/OFF duty.

2) Class F.Class H.

3) Suitable for at least 60 starts per hour.

4) A time rating of at least 15 minutes at 104122°F or twice the gate stroking time, whichever is the longer, at an average load of at least 33% of maximum gate torque.

5) Removal of the motor should be possible without draining the oil from the actuator.

f. In accordance with NEMA MG 1.

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g. Totally enclosed.

h. Locked-rotor torque, minimum: 250 percent of full-load torque.

i. Motor overload: Operation will stop.

21. Integral Motor Starter:

a. Solid-state, full-voltage, reversing type utilizing Silicon Controlled Rectifiers (SCRs) or Insulated Gate Bipolar Transistors (IGBTs) for power switching.

b. Reversing starter, control transformer, and local controls shall be integral with the gate actuator, suitably housed to prevent breathing and condensation buildup.

c. Solid-state type suitable for at minimum 60 starts per hour, and of current rating appropriate to motor size and incorporating thermal overload protection via electronic monitoring.

d. Control Power Transformer: Provide suitable voltage for control circuits.

e. Connections and terminal blocks:

1) Conductors:

a) Copper, type THW, THWN, or XHHW.

b) Enclosed in liquid-tight conduit with black jacket flexible metal conduit, or rigid steel conduit.

c) Attached identification marker near each conductor termination.

2) Furnish conductors necessary for interconnecting enclosures mounted on the motor-operated gate actuators.

3) Terminate, on terminal blocks in one-enclosure, power and control conductors for connection external to gates.

4) Mark terminals with terminal designations.

5) Hub suitable for liquid-tight flexible-metal or rigid steel conduit.

22. Actuator Control Compartment:

a. Watertight, dustproof, and O-ring sealed to meet NEMA 250, Type 6.

b. Compartment shall house motor contactor, torque and positions switches, and communication modules.

23. Actuator Termination Compartment:

a. Separate, sealed termination compartment.

b. Terminals allow installation of conductors with crimped ring connectors.

c. Terminal identification integral part of terminal strip.

24. Motor-operated gate actuators shall be of the same manufacturer.

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25. Motor-operated gate actuators shall be of the same model, size, or series within torque and stem diameter limitations, maximizing part interchangeability.

26. Lockable tamper-proof protective cover over display and all electrical controls.

B. Provide two setting tools (remote controls, specialized computers), if such a device is required, to commission, program, or set actuator limits.

C. External fasteners in accordance with ASTM F593 and ASTM F594, 300 series stainless steel.

D. Mounting brackets in accordance with ASTM A276, 300 series stainless steel.

E. Use anti-seizing compound on external fasteners and stainless steel bolts.

F. Coatings in accordance with Section 09 96 20 – Coatings.

2.08 GEARBOX

A. Supplied by the gate manufacturer.

B. Manufactured by the actuator manufacturer.

C. Coatings in accordance with Section 09 96 20 – Coatings.

2.09 NAMEPLATES

A. Individual equipment nameplate shall identify each gate and actuator.

B. Nameplate shall indicate size, capacity, rating, amount of grease or oil to be used, manufacturer name, model number, and serial number.

C. Nameplate shall be attached to the equipment by means of screws or rivets.

D. Stamped or raised markings.

E. Nonrusting metal.

2.10 PEDESTAL

A. Design and manufacture in accordance with AWWA C561.

B. Coatings in accordance with Section 09 96 20 – Coatings.

2.11 ANCHOR, BOLT, AND NUTS

A. Cap screws, studs, assembly bolts, and anchors bolts shall be stainless steel in accordance with ASTM F593 and ASTM F594.

B. Minimum Embedment Depth: 6 inches or as recommended by the manufacturer.

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C. On each anchor bolt, a minimum of three threads shall be exposed past the nut.

D. No portions of the threaded rod shall contact reinforcing steel.

E. Other requirements per Section 03 20 30 – Post-Installed Adhesive Anchors.

2.12 ANTI-SEIZING COMPOUND

A. Marine Grade Anti-Seize Lubricant, Loctite 8023 as manufactured by Loctite (Henkel Corporation), 800-624-7767, https://www.loctite.com; or equal, having the following essential characteristics:

1. Non-lead.

2. Does not promote galvanic corrosion.

3. Water wash-out spray resistance.

4. Fresh water resistance.

2.13 GROUT

A. Nonshrink grout for base of gate frames and bottom sill in accordance with Section 03 62 20 - Nonshrink Grout for Equipment and Metalwork.

2.14 SHOP ASSEMBLY AND TESTING

A. Assemble and verify all operational aspects of slide gates and gate actuators.

B. Government representative shall witness all tests unless otherwise directed. Notify the COR in writing at least 14 calendar days prior to shop testing.

C. Shop test the gate in accordance with AWWA C561.

D. Shop leakage test not required.

E. Shop actuator proof-of-design testing and performance testing by verifying that each gate actuator runs and limit setting stops the actuator. Testing can be performed with no load applied to the actuator.

F. Submit shop assembly and test results.

PART 3 EXECUTION

3.01 REMOVE AND DISPOSE:

A. Remove and dispose of existing cast iron gates, including gate frame, leaf, and stem, in accordance with specification Section 01 74 00 – Cleaning and Waste Management.

1. Removal of cast iron gates will require chipping into existing grout/concrete blockout at the bottom gate sill. Drawings note approximate dimensions of

35 23 11 - 14 material to be removed, however actual quantity may vary. Chip only as necessary for gate removal taking care not to hit, cut, or damage existing embedded reinforcement. Stop and immediately inform COR if embedded reinforcement is damaged.

2. Do not damage existing thimbles.

3. Remove existing fasteners from the gate thimble to allow installation of new gate frame on existing tapped holes.

4. After removal of existing gates, repair concrete walls as necessary and in accordance with USBR M-47.

3.02 REMOVE AND RETAIN:

A. Remove existing gate actuators in accordance with specification Section 01 74 00 – Cleaning and Waste Management. Equipment to be retained by Government.

B. Box and crate removed equipment ready for transport. Store in location as directed by

COR.

3.03 INSTALLATION

A. Prior to gate installation, blast and recoat gate thimbles in accordance with specification Section 09 96 20 – Coatings.

B. Installation of Slide Gates and Actuators:

1. After removing existing gate frame, remove existing fasteners from the existing gate thimble. Take care not to damage the existing thimble.

a. If existing fasteners cannot be unscrewed without damaging the existing thimble, the fastener may be drilled out.

b. As recommended by the gate manufacturer, use larger fasteners for drilled-out anchors, or drill and tap new holes into the thimble as needed.

2. Field-verify the locations of tapped holes in the existing gate thimble and drill corresponding holes in the new gate frame to ensure proper alignment.

3. Perform non-destructive testing on concrete structure, such as Ground Penetrating Radar, to identify location of existing embedded reinforcement.

a. New stainless steel anchors shall avoid contact with embedded steel.

4. Install slide gates in accordance with AWWA C542 and AWWA C561 and as shown on the drawings.

a. Install and inspect installation of anchors in accordance with Section 03 20 30 – Post-Installed Adhesive Anchors.

b. Set gate frame plumb and square within tolerances recommended by the gate manufacturer and the following:

1) Vertical alignment: Plus or minus 1/16-inch per foot.

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2) Horizontal alignment: Plus or minus 1/16-inch across the full width.

5. Place isolating gasket or mastic between stainless steel frame and gate thimble.

Place isolating washers and sleeves between stainless steel anchors and stainless steel frame. See specification Section 26 42 00 – Cathodic Protection General Requirements and Drawing 423-D-60247.

6. Install gates to prevent leakage past the seats. Maximum allowed leakage shall be

0.1 gallons per minute per foot of seating perimeter at design head.

7. Leakage between gate frame and cast iron thimble is not acceptable.

C. After final adjustments, grout gate frame and sill in accordance with Section 03 62 20 - Nonshrink Grout for Equipment and Metalwork.

1. Repair areas that were chipped for existing gate removal.

2. Space between gate frame and structure walls to be grouted as shown on drawings, or as recommended by gate manufacturer.

D. Install stem and actuator in accordance with AWWA C561 and as shown on the drawings. Locate centerline of handwheel or crank as shown on the drawings.

E. Verify and lubricate stem and actuator in accordance with the manufacturer’s recommendations.

3.04 FIELD TESTING

A. Each equipment manufacturer shall provide field service engineer for installation, inspection, start-up assistance, and operational training of the gate and actuator assemblies:

1. Notify the COR in writing at least 14 calendar days prior to field testing.

2. Government Inspector will witness all tests, unless otherwise directed.

3. Field service engineer shall inspect the equipment after the gates and the actuators are installed and assist the start-up operation.

B. Set Actuator Torque Settings:

1. Initially set recommended torque settings.

2. Adjust settings to ensure that gate opens and closes and that gate seals when closed.

C. Limit settings shall be adjusted and tested to prove their ability to stop motor operations in both directions of travel and that the gate will fully open and will seal closed.

D. Field Tests Including:

1. After installation, and setting torque and limit settings, operate the gate through not less than three complete cycles of opening and closing, with gate operation

35 23 11 - 16 stopped and started at three intermediate positions in each direction of travel one time.

2. Observe equipment operation for defects such as excessive noise, vibration, inconsistent operating speed, or visual deflection, deformation, or damage of parts.

3. Measure and record running amps drawn by actuators during opening and closure of each gate in dry condition and compare to rated amps of the actuator.

4. Correct defects observed during tests to make the equipment fully operational and retest until operation is without defects and to the acceptance of the COR.

E. Leakage Testing:

1. Test gates for leaks unless otherwise directed by COR.

2. Install stoplogs either upstream or downstream of the gate to achieve an unseating head condition with the applied water pressure. Fill the space between the stoplogs and the gate to a minimum water height of 10-feet, or as directed by

COR.

3. Water for leakage testing may be sourced from All American Canal under an approved water use permit. See Section 01 51 00 – Temporary Utilities for permit requirements.

4. Maximum allowed leakage shall be 0.1 gallons per minute per foot of seating perimeter at design head of 20-feet. If leakage test is conducted at a lower head, the leakage rate shall not exceed 0.1 gallons per minute per foot of seating perimeter multiplied by the square root of the lesser head divided by the static design head.

5. Leakage between gate frame and cast iron thimble is not acceptable.

F. Evidence of improper fit, misalignment, galling, overheating or other defects will be considered defective work and shall be repaired or defective equipment replaced until such time that the defect or defective equipment has been eliminated.

G. Touch up gate thimble coatings after final installation and testing in accordance with specification Section 09 96 20 – Coatings.

3.05 TRAINING

A. In accordance with Section 01 79 20 - Training.

END OF SECTION