Attachment_1_Statement_of_Work.pdf

ATTACHMENT 1, STATEMENT OF WORK

Roger Williams National Memorial Site

Irrigation System Installation

1.0 Background

Roger Williams National Memorial commemorates the life of the founder of Rhode Island and a champion of the ideal of religious freedom. Williams, banished from Massachusetts for his beliefs, founded Providence in 1636. This colony served as a refuge where all could come to worship as their conscience dictated without interference from the state. This 4.75 acre site in the heart of Providence, RI, currently serve as an important urban park for the community around it.

There is a 35 year old irrigation system in the landscape currently that will be replaced under this scope of work.

2.0 Scope

The contractor shall provide all personnel, equipment, tools, supervision, and other items and services necessary to remove the existing irrigation system, install the attached irrigation system, program the system in cooperation with the park, warranty operation for one year from the date of acceptance, and produce as builts.

3.0 Objectives

Abandon existing irrigation system below grade, cap lines that have been exposed, and demolish (remove) at grade items such as sprinkler heads, valve boxes, quick couplers, etc. as part of the switch over to the new system.

Install new controller system.

Install new street connection and back flow preventer.

Install piping, heads, valves, wires, and other components.

Utilizing existing sleeves, limit ground disturbance.

Minimize damage to landscape features such as vegetation, soil, and hardscape.

Repair construction scars efficiently and quickly.

Minimize safety issues and impact on park operations.

4.0 Tasks

PART 1 - GENERAL

1.01 GENERAL REQUIREMENTS

A. Include GENERAL CONDITIONS and applicable parts of Division 1 as part of this Section.

B. Coordinate work of this Section with other underground utilities and with trades responsible for their installation. Refer to respective drawings pertaining to other work.

1.02 WORK TO BE DONE

A. Work to be done includes furnishing labor, materials, equipment and services required to complete irrigation work indicated on the drawings, as specified herein, or both.

B. Mechanical point of connection for the irrigation system shall be an existing 2-inch pipe located within the existing manhole downstream of the water meter where indicated on the drawing.

C. Electrical point of connection for the irrigation system shall be to the existing 120-volt, electrical circuit feeding the existing controller in the Visitor Center’s basement.

D. Drawings and specifications must be interpreted and are intended to complement each other. Contractor shall furnish and install parts, which may be required by the drawings and omitted by the specifications, or vice versa, just as though required by both. Should there appear to be discrepancies or question of intent, the Contractor shall refer the matter to the Owner’s Representative for decision, and his interpretation shall be final, conclusive and binding.

E. Necessary changes to the drawings to avoid any obstacles shall be made by the Contractor with the approval of the Owner’s Representative.

F. Excavation, backfilling and bedding materials, together with the testing of the completed installation shall be included in this work.

G. Work shall be constructed and finished in every respect in a good, workmanlike and substantial manner, to the full intent and meaning of the drawings and specifications. Parts necessary for the proper and complete execution of the work, whether the same may have been specifically mentioned or not, or indicated on the drawings, shall be done or furnished in a manner corresponding with the rest of the work as if the same were specifically herein described.

H. Record Drawings as well as Operating & Maintenance Manual generation, in accordance to these specifications shall also be included in this work.

1.03 SCOPE

A. Irrigation system shown on the drawings and described within these specifications represents a single controller, turf and landscape irrigation system supplied from municipal water. System is designed for 50 gallons per minute. Minimum 70-psi dynamic pressure at full system flow is required upstream of the meter and backflow preventer.

1.04 ORDINANCES, PERMITS AND FEES

A. Work under this Section shall comply with ordinances and regulations of authorities having jurisdiction.

B. Obtain and pay for permits, tests and certifications required for the execution of Work under this Section including backflow prevention permit.

C. Furnish copies of Permits, Certifications and Approval Notices to the Owner's Representative prior to requesting payment.

D. Include in bid any charges by the Water Department, Utility Company, or other authorities for work done by them.

1.05 EXAMINATION OF CONDITIONS

A. Be informed of existing conditions on the site before submitting bid, and be fully responsible for carrying out the work required to fully and properly execute the work of the Contract, regardless of the conditions encountered in the actual Work.

No claim for extra compensation or extension of time will be allowed on account of actual conditions inconsistent with those assumed, except those conditions described in the GENERAL CONDITIONS.

1.06 QUALITY ASSURANCE

A. Installer: A firm which has at least five (5) years’ experience in work of the type and size required by this Section and which is acceptable to the Owner's Representative.

B. References: Supply five references for work of this type and size with bid includ-ing names and phone numbers of contact person(s).

C. Applicable requirements of accepted Standards and Codes shall apply to the Work of this Section and shall be so labeled or listed:

1. American Society for Testing & Materials (ASTM)

a. ASTM: D1784 Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds.

b. ASTM: D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and Cl200.

c. ASTM: D2464 Threaded Poly (Vinyl Chloride) (PVC) Plastic Pipe

Fittings, Schedule 80.

d. ASTM: D2466 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40.

e. ASTM: D2564 Solvent Cements for Poly (Vinyl Chloride) (PVC)

Plastic Piping Systems.

f. ASTM: B43-98 Brass pipe.

g. ASTM: B88-99 Seamless Copper Water Tube

h. ASTM: B828-00 Soldered Copper Joints.

i. ASTM: D2737-99 Polyethylene (PE) Pressure Rated Tube

2. National Standard Plumbing Code (NSPC)

3. National Electric Code (NEC)

4. National Sanitary Foundation (NSF)

5. American Society of Agricultural and Biological Engineers (ASABE)

6. Underwriters Laboratories, Inc. (UL)

7. Occupational Safety and Health Administration (OSHA)

8. American Society of Irrigation Consultants (ASIC)

1.07 TESTS

A. Observation: Owner’s Representative will be on site at various times to ensure the system is being installed according to the specifications and drawings.

B. Coverage Test: After completion of the system, test the operation of entire system and adjust sprinklers as directed by the Owner's Representative.

Demonstrate to the Owner's Representative that irrigated areas are being adequately covered. Furnish and install materials required to correct inadequacies of coverage due to deviations from the drawings or where it is obviously inadequate or inappropriate. (See Part 3 - Execution).

C. Owner’s Representative shall be notified 7 days in advance for observations.

D. During final observation, Contactor shall have two-way communication and sufficient personnel to provide instantaneous communication between the observation area and the controller for the system.

1.08 SUBMITTALS

A. Provide copies of product specification sheets on proposed equipment to be installed to the Owner's Representative for approval prior to the start of work, in accordance with the parameters of Division-1. Work on the irrigation system may not commence until product sheets are submitted and approved. Submittals shall be marked up to show proper nozzles, sizes, flows, etc. Equipment to be included:

1. Sprinklers

2. Valves: Manual and Automatic

3. Controller

4. Decoders

5. Valve Boxes

6. Copper Pipe and Fittings

7. PVC Pipe and Fittings

8. Polyethylene Pipe and Fittings

9. Wire and Connectors

10. Quick Coupling Valves

11. Filters

12. Grounding Equipment

13. Surge Equipment

14. Master Valve

15. Flow Sensor

16. Backflow Prevention Device

17. Backflow Enclosure

18. Rain Shut-off

19. Miscellaneous Materials

B. Project Record Documents:

1. Provide and keep up-to-date a complete redlined Record Set of Drawings of the system as the project proceeds. Drawings shall be corrected daily, showing every change from the original drawings and specifications.

Record Drawings shall specify and exactly locate sprinkler type; pop up height and nozzle for each sprinkler installed. Each valve box location to be referenced by distance from a minimum of two permanent locations.

Controller, rain shut-off, quick coupling valves, backflow prevention device and other equipment shall be indicated on the drawings. Wire routing, wire size and splices shall be indicated. Mainline pipe, lateral pipe and wire route shall have three (3) distinctly different graphic symbols (line types). This redlined record set of drawings shall be kept at job site and shall be used only as a record set.

2. This redlined set of documents shall also serve as work progress sheets and shall be the basis for measurement and payment for work completed.

This record set of drawings shall be available for observation and shall be kept in a location designated by Owner’s Representative. Should this record set of drawings not be available for review or not be up-to-date at the time of the observation, it will be assumed no work has been completed. Provide copies of the redlined record set of drawings for Owner’s Representative review on a monthly basis.

3. Make neat and legible notations on this record set of drawings daily as the work proceeds, showing the work as actually installed. For example, should a piece of equipment be installed in a location that does not match the plan, indicate that equipment in a graphic manner in the location of installation and so as to match the original symbols as indicated in the irrigation legend. Should the equipment be different from that specified, indicate with a new graphic symbol both on the drawings and the irrigation legend. The relocated equipment dimensions and northing and easting coordinates should then be transferred to the appropriate drawing in this record set of drawings at the proper time.

4. On or before the date of final field observation, deliver corrected and completed AutoCAD.dwg (Version 2018 or higher) and pdfs. Sheet size shall be 22-inch x 34-inch with a maximum scale of 1-inch = 20 feet.

Provide plots of “record drawings” on vellum and AutoCAD electronic files on thumb drive to Owner’s Representative as part of contract closeout. Delivery of plots will not relieve the responsibility of furnishing required information that may have been omitted from the prints. Record drawings shall not be marked up design drawings. Record drawings shall be on Contractors own title block with installed, not proposed irrigation information.

1.09 DELIVERY, STORAGE AND HANDLING

A. Store and handle materials in compliance with manufacturer instructions and recommendations. Protect from possible damage. Minimize on-site storage.

1.10 GUARANTEE

A. Obtain in the Owner's name the standard written manufacturer's guarantee for materials furnished under this Section where such guarantees are offered in the manufacturer's published product data. These guarantees shall be in addition to, and not in lieu of, other liabilities that the Contractor may have by law.

B. In addition to the manufacturers guarantees the Contractor shall warrant the entire irrigation system, both parts and labor for a period of one (1) year from the date of acceptance by the Owner.

C. As part of the one-year warranty the Contractor shall perform the first year-end winterization and spring start-up for the irrigation system.

D. Should any problems develop within the warranty period because of inferior or faulty materials or workmanship, they shall be corrected to the satisfaction of the Owner’s Representative at no additional expense to the Owner.

E. A written warranty showing date of completion and period of warranty shall be supplied upon completion of the project.

1.11 COORDINATION

A. Coordinate work closely with the Owner’s Representative to avoid misunder-standings and to efficiently bring the project to completion. Owner’s Representative shall be notified as to the start of work, progression and completion, as well as any changes to the drawings before the change is made.

B. Be responsible for and pay for damage to others’ work from workmen or sub-contractors. Repairing of such damage shall be done by whomever originally installed the work, as directed by the Owner’s Representative.

1.12 MAINTENANCE AND OPERATING INSTRUCTIONS

A. Include in Bid an allowance for four (4) hours of instruction of National Park Service's personnel upon completion of check/test/start-up/adjust operations by a competent operator (Owner’s Representative office shall be notified at least one

(1) week in advance of check/test/start-up/adjust operations).

B. Upon completion of work and prior to application for acceptance and final payment, a minimum of three (3) three ring, hard cover binders titled

MAINTENANCE AND OPERATING INSTRUCTIONS FOR THE ROGER

WILLIAMS NATIONAL MEMORIAL IRRIGATION SYSTEM, shall be submitted to the Owner’s Representative office. After review and approval, the copies will be forwarded to the Owner. Included in the Maintenance and Operating binders shall be:

1. Table of Contents

2. Written description of Irrigation System.

3. System drawings:

a. One (1) copy of the original irrigation plan;

b. One (1) copy of the Record Drawing;

c. One (1) reproducible of the Record Drawing;

d. One (1) copy of the controller valve system wiring diagram

4. Listing of Manufacturers.

5. Manufacturers’ data where multiple model, type and size listings are included; clearly and conspicuously indicating those that are pertinent to this installation.

a. "APPROVED" submittals of irrigation equipment;

b. Operation: User’s Manuals

c. Maintenance: including complete troubleshooting charts.

d. Parts list.

e. Names, addresses and telephone numbers of recommended repair and service companies.

6. A copy of the suggested "System Operating Schedule" which shall call out the controller program required (zone run time in minutes per day and days per week) in order to provide the desired amount of water to each area under "no-rain" conditions.

7. Winterization and spring start-up procedures.

8. Guarantee data.

1.13 PROCEDURE

A. Notify city departments and/or public utility owners concerned of the time and location of any work that may affect them. Cooperate and coordinate with them in the protection and/or repairs of utilities.

B. Provide and install temporary support, adequate protection and maintenance of structures, drains, sewers, and other obstructions encountered. Where grade or alignment is obstructed, the obstruction shall be permanently supported, relocated, removed or reconstructed as directed by the Owner’s Representative.

PART 2 - PRODUCTS

2.01 GENERAL

A. Materials to be incorporated in this system shall be new and without flaws or defects and of quality and performance as specified and meeting the requirements of the system. Material overages at the completion of the installation are the property of the Contractor and shall be removed from the site.

B. No material substitutions from the irrigation products described in these specifications and shown on the drawings shall be made without prior approval and acceptance from the Owner’s Representative.

2.02 COPPER PIPE AND FITTINGS

A. Copper pipe shall be Type K, hard tempered ASTM B88.

B. Copper fitting shall be wrot or cast copper, solder joint type in accordance with

ASTM B828-00.

C. Joints shall be soldered with silver solder ASTM B32, Grade 95TA up to 250 degree using non-corrosive flux.

D. Supply only pipes and fittings that are marked by the manufacturer with the appropriate ASTM designations and pressure ratings and are free from cracks, wrinkles, blisters, dents or other damage.

2.03 BRASS PIPE AND FITTINGS

A. Brass pipe shall be 125lb., cast bronze, ground joint pattern, threaded, ASTM B43-98.

B. Brass fittings shall be cast bronze, screwed, 125lb. Class.

2.04 PVC IRRIGATION PIPE

A. Pipe shall bear the following markings: manufacturer’s name, nominal pipe size, schedule or class, pressure rating in psi, and date of extrusion.

B. Mainline pipe shall be PVC, Class 200, Type 1120, SDR 21, Solvent-Weld PVC, conforming to ASTM No. D2241 as manufactured by Ipex, JM Eagle, Silverline or equal.

C. Lateral pipe, 1-1/2 and 2-inch in size shall be PVC, Class 200, Type 1120, SDR 21, Solvent-Weld PVC, conforming to ASTM No. D2241 as manufactured by Ipex, JM Eagle, Silverline or equal.

2.05 PVC SLEEVING PIPE

A. Pipe sleeves beneath non-soil areas shall be PVC, Class 160 water pipe as manufactured by Ipex, JM Eagle, Silverline or equal. Sleeve size shall be as indicated on the drawings. Minimum sleeve size to be 3-inch.

2.06 PVC IRRIGATION FITTINGS

A. Fittings for solvent weld PVC pipe, 2-1/2 inch and smaller in size, shall be Schedule 40 solvent weld PVC fittings as manufactured by Dura, Lasco, Spears or approved equal.

B. Fittings shall bear manufacturer’s name or trademark, material designation, size, and applicable I.P.S. schedule.

C. PVC threaded connections in and out of valves shall be made using Schedule 80 toe nipples and Schedule 40 couplers or socket fittings. Schedule 40 threads will not be approved for installation.

D. PVC solvent shall be NSF approved, for Type I and Type II PVC pipe, and Schedule 40 and 80 fittings. Cement is to meet ASTM D2564 and FF493 for potable water pipes. Cement shall be medium set not fast (no wet and dry or hot).

PVC solvent cement shall be Rectorseal Gold, IPS Weld-ON 711, Oatey Heavy Duty Cement or approved equal, and shall be used in conjunction with the appropriate primer. Primer shall be NSF approved, and formulated for PVC and CPVC pipe applications. Primer is to meet ASTM F 656. Primer shall be Rectorseal Jim PR-2, IPS Weld-ON P-70, Oatey Primer for PVC and CPVC, or approved equal. Clear primers and cements are no acceptable.

E. Nipples to be schedule 80 PVC.

2.07 POLYETHYLENE IRRIGATION PIPE

A. Lateral piping 1-1/4 and 1-inch in size shall be installed with polyethylene (PE- 3408) pipe, SDR 15, Class 100, Type III, Grade 3, Class C conforming to ASTM D2239, with a minimum pressure rating of 100 psi as manufactured by Oil Creek or equal.

2.08 POLYETHYLENE IRRIGATION FITTINGS

A. Fittings for polyethylene pipe shall be insert PVC or Nylon type fittings. Fittings shall conform to NSF standards and be attached with two (2) offset dog-eared stainless-steel clamps. Clamps shall be as manufactured by Oetiker or approved equal.

B. Supply only pipes and fittings that are marked by the manufacturer with the appropriate ASTM designations and pressure ratings and are free from cracks, wrinkles, blisters, dents or other damage.

C. Fittings shall be per ASTM D2609 as manufactured by Dura, Lasco or Spears.

2.09 WIRE CONDUIT

A. Conduit for wiring beneath non-soil areas shall be PVC, SCH-40 conduit with solvent-weld joints, as manufactured by Carlon, Cresline, JMM or equal.

B. Sweep ells shall be standard electrical type PVC schedule 40 long sweep elbows.

Cap sweep ell with tri-plug with the ring for securing nylon pull rope.

C. Conduit for above ground wiring to rain shut-off or controller shall be schedule 40 rigid conduits.

2.10 SPRAY SPRINKLERS

A. Full and part circle pop up spray sprinklers shall be pressure regulating (30-psi), plastic construction with ratcheting riser, removable nozzle and check valve. Pop-up height shall be 6 inches for turf and 12 inches for shrubs and where indicated on the drawings.

B. Nozzle size shall be as indicated on the drawing and in the legend. VAN nozzles shall only be used where a fixed arc nozzle is not available.

C. Sprinkler shall carry a minimum 3-year exchange warranty against defects.

Sprinklers shall be manufactured by Hunter Industries, model PROS-06/12- PRS30-CV, Rain Bird 1806/1812-SAM-PRS or approved equal. Fixed arc nozzles shall be Hunter MPR. VAN nozzles shall be Rain Bird HE-VAN.

2.11 MPROTATOR SPRINKLERS

A. Full and part circle pop up spray sprinklers with multi-stream rotary nozzles shall be pressure regulating (40/45-psi), plastic construction with ratcheting riser, removable nozzle and check valve. Nozzle size shall be as indicated on the drawing and in the legend. Pop-up height shall be 6 inches for turf and 12 inches for shrubs and where indicated on the drawings.

B. Multi-stream rotary nozzles shall be manufactured by Hunter MP2000 for 18-foot spacing where indicated on the drawings.

C. Sprinkler shall carry a minimum 3-year exchange warranty against defects.

Sprinklers shall be manufactured by Hunter Industries model PROS-06/12- PRS40, Rain Bird 1806/1812-SAM-P45 or approved equal.

2.12 SMALL/MEDIUM ROTARY SPRINKLERS

A. Small/medium rotary sprinklers shall be gear-driven, rotary type sprinklers, designed for in-ground installation with integral check valves and in-riser flow shut-off capability. Sprinkler shall be capable of covering a 25-44-foot radius and flow range of 0.9-7.0 gpm at 50-55 pounds per square inch of pressure. Sprinklers shall have a one hundred percent warranty for two years’ minimum against defects in workmanship.

B. Nozzle assembly shall elevate minimum four inches when in operation and retraction shall be achieved by a stainless-steel spring. Riser assembly shall be plastic. A nozzle wiper seal shall be included in the sprinkler for continuous operation under the presence of sand and other foreign material.

C. Sprinkler parts shall be removable through the top of the unit through the removal of a heavy-duty threaded cap. The sprinkler shall have a three quarter-inch (3/4") IPS water connection on the bottom of the sprinkler.

D. Sprinklers shall be manufactured by Hunter Industries model I20-04, Rain Bird 5004-Plus.

E. Approved Performance Chart (25’ Spacing):

Model Pressure Arc Nozzle Flow Radius

Hunter I20-04 50psi 90 Deg. 0.75SR 0.75 25’

Hunter I20-04 50 psi 180 Deg. 1.5SR 1.5 25’

Hunter I20-04 50 psi 360 Deg. 3.0SR 3.0 25’

F. Approved Performance Chart (35’ Spacing):

Model Pressure Arc Nozzle Flow Radius

Hunter I20-04 50 psi 90 Deg. 2.0 2.0 38’

Hunter I20-04 50 psi 180 Deg. 4.0 4.2 41’

Hunter I20-04 50 psi 360 Deg. 8.0 6.8 44’

2.13 LARGE ROTARY SPRINKLERS

A. Large rotary sprinklers shall be gear-driven, rotary type with drain check valve and stainless-steel riser designed for in-ground installation. The nozzle assembly shall elevate three inches when in operation and retraction shall be achieved by a stainless-steel spring. Check valve shall be capable of holding up to 10 feet of elevation. Sprinkler shall be capable of covering a 51-58-foot radius and flow range of 10.1 to 14.5 gpm at 50 pounds per square inch of pressure.

B. Sprinkler parts shall be removable through the top of the unit by removing a heavy-duty threaded cap. The sprinkler shall have a one- inch (1") IPS water connection on the bottom of the sprinkler.

C. Sprinklers shall be manufactured by Hunter Industries model I25-04-SS or approved equal.

D. Approved Performance Chart (45’ Spacing):

Model Pressure Arc Nozzle Flow Radius

Hunter I25-04-SS 60 psi 90 Deg. 5 5.3 45’

Hunter I25-04-SS 60 psi 180/360

Deg.

8 9.2 50’

E. Approved Performance Chart (50’ Spacing):

Model Pressure Arc Nozzle Flow Radius

Hunter I25-04-SS 60 psi 90 Deg. 7 7.5 48’

Hunter I25-04-SS 60 psi 180/360

Deg.

13 12.3 54’

2.13 ELECTRIC CONTROL VALVES

A. Electric control valves shall be one, one and one half and 2-inch remote control, diaphragm type, fiberglass or reinforced nylon body plastic valves with manual flow control, manual bleed screw and 200 psi pressure rating. Valves shall be equipped with filtration for dirty water.

B. Valves shall be manufactured by Hunter Industries, model ICV, Rain Bird PEB or approved equal.

2.14 FLOW SENSOR

A. Flow meter (2 inch) shall have ability to track flow through the Hydrowize HCC controller. Flow meter must be accurate to within plus or minus 1% of full scale and display repeatability of plus or minus 0.5% of full scale for flows or 2.8 to 170 gpm. Flow sensor shall be installed in a 2-inch Schedule 80 PVC tee according to Manufacturer recommendations and the details. Flow sensor to be Hunter, model HC-200-FLOW sensor.

2.15 MASTER VALVE

A. Master valve shall be brass construction, normally closed, 2-inch with no minimum flow requirement as manufactured by Buckner/Superior, 3200-200 series or approved equal.

2.16 IDENTIFICATION TAGS

A. Valves shall have ID tags attached. ID tags shall be manufactured from Polyurethane Behr Desopan. Provide one tag for each electric valve. Use one maxi size tag for electric control valve. Each tag shall provide valve and station ID information.

B. Tags shall be as manufactured by T. Christy Enterprises or approved equal.

2.17 VALVE BOXES

A. Plastic valve boxes shall be manufactured from unformed resin with a tensile strength of 3,100-5,500 psi conforming to ASTM D638. Boxes shall be green or black in color.

B. Valve boxes for isolation valves, wire splices and quick coupling valves shall be 10-inch round valve boxes with metal detection, T-top lids and bolt down covers.

Splice boxes shall have gray lids.

C. Valve boxes for single 1 and 1-1/2-inch electric valves with isolation, master valve and flow sensor shall be 12-inch standard valve boxes with metal detection, T-top lids and bolt down covers. When multiple 1-inch electric valves are installed in the same area, they are to be installed no more than two (2) valves per box in a 12-inch standard box.

D. Valve boxes for MPRotator zones, single 2-inch and dual 1-1/2-inch and 2-inch valves with isolation shall be 18-inch jumbo valve boxes with metal detection, T-top lids and bolt down covers. When multiple 1-1/2 and 2-inch electric valves are installed in the same area, they are to be installed no more than two (2) valves per box in an 18-inch standard box.

E. Valve box extensions shall be provided and installed as required for proper box depth. Valve box extensions shall be made by the same manufacturer as the box.

F. Plastic valve boxes shall be manufactured by Dura Plastics, Highline Products or Olde Castle Specification Grade.

2.19 AUTOMATIC CONTROLLER

A. Controller shall be electronic in construction with capability of 1 minute to 24 hour run times per zone. Controller to have minimum 54 independent programs, 2 station simultaneous operation, auto/off switch and be capable of manual, semi-automatic and automatic operation. Controller shall have water budgeting feature, cycle and soak feature, 2 sensor inputs, locking, weather resistant metal cabinet and internal transformer. Terminal strip connection shall be easily accessible.

Controller shall be equipped with 2.4 GHz WIFI frequency. Controller shall modify irrigation schedules based on predictive watering. Controller shall have built in zone tester and come pre-wired with a SmartPort for remote control. The controller shall be U.L. listed, 120-volt, 60 Hertz, A.C. type.

B. Controller shall have flow monitoring and flow management capabilities with compatible flow sensor connection. Controller shall be capable of automatic flow learning per station and have station level flow diagnostics and alarm shutdown.

C. Controller shall have 2-year warranty.

D. Controller shall be as manufactured by Hunter Industries, model HCC with EZ- DM decoder output module.

2.20 SURGE ARRESTOR (CONTROLLER)

A. Modular surge arrester shall be a single phase, two pole arrester designed to protect single or split phase 120 volt or 120/240-volt electrical system. Electrical connection shall be embedded in a UL recognized epoxy to seal and protect them from moisture and corrosion.

B. Surge arrestor shall be molded from weather and UV resistant polycarbonate, complying with the UL Standard for flame and strength resistance.

C. Arrestor shall include green LED operating light.

D. Surge arrester shall be manufactured by Paige Electric, model, 250090LED with mounting bracket or approved equal.

2.21 DECODERS

A. Decoders shall be installed between the controller and the electric control valves to provide the power supply for individual valves. Decoder shall be available as a 1 station device. Decoder shall have a unique serial number and controller-assigned address to identify it in the network.

B. Decoder output modules shall be EZ-1 manufactured by Hunter with minimum 3-year warranty.

2.22 WIRE

A. Valve control wire from the decoder to the valve shall be minimum #14-awg, single strand, solid copper; UL- approved direct burial AWG-U.F. 600V and shall meet all state and local codes for this service. Wire shall be red in color.

B. In ground wire connections shall be UL listed, manufactured by Paige, 3M, model DBR/Y-6 splice kits or equal. Wire splices shall be made in valve boxes, electrical junction boxes, at the controller or at valves. Connections shall be installed as per their manufacturers’ instructions.

C. Valve control wire from the controller to the decoders, blue in color shall be through two-wire. Wiring shall be polyethylene double-jacketed or UF-B UL PVC double-jacketed two-conductor solid copper designed for direct burial systems. Wire gauge shall be AWG #14/#14. Cable shall be as manufactured by Paige Electric, P7354D or equal.

D. Wire type and method of installation shall be in accordance with local codes for NEC Class II circuits of 30-volt A.C. or less.

E. Wiring shall be in strict accordance with national, state and local electrical codes.

2.23 COMMUNICATION CABLE - CONTROLLER TO FLOW SENSOR

A. Communication cable from the controller to flow sensor shall be jacketed, four conductor, two pair cable. The cable shall be suitable for direct burial in the earth and also may be installed in ducts or conduits.

B. In ground wire connections shall be UL listed, manufactured by Paige, 3M, model SLiC communication cable splice kits or equal. Wire splices shall be made in valve boxes, electrical junction boxes, at the controller or at valves. Connections shall be installed as per their manufacturers’ instructions.

C. Conductors shall be high density insulated tin coated copper conductors.

Conductors shall have a 0.00235-inch aluminum/mylar shield helically applied and a #20 AWG drain wire to drain off electrical, magnetic or RF interference.

The cable shall be rated 600 volts. The four conductors shall be seven strand, #18 AWG, 0.015 high density PE insulation wall.

D. The two pair shall be color coded red/black and blue/orange and shall be soft annealed tin coated copper conforming to ASTM B-33. Insulation shall be high density polyethylene conforming to ICEA S-56-434.

E. Outer jacket shall be 0.045-inch polyethylene conforming to ICEA S-61-402.

The communication type cable shall be marked on the jacket as follows: "2 Pr #18 AWG Shld D/B Paige P7171D".

F. Wire shall be as manufactured by Paige Electric, P7171D or approved equal.

2.24 WIRELESS RAIN SHUT OFF

A. Controller shall be able of accepting a signal from a wireless rain sensor and using this data to automatically turn off the irrigation system.

B. Rain sensor shall be polycarbonate in construction with adjustable interruption point and metal extension arm.

C. System operating frequency shall be 433MHz. Package shall be UL listed; FCC approved.

D. Receiver input power shall be 24 VAC from controller.

E. Rain sensor package shall carry a five (5) year warranty.

F. Rain sensor shall be manufactured by Hunter Industries, model WR-Clik or equal.

Weather sensor package shall include module, sensor (Transmitter) and wireless receiver.

G. Sensor shall be installed within a stainless-steel sensor guard as manufactured by Hunter, model WS-Guard or equal.

2.25 QUICK COUPLING VALVES

A. Valve body shall be of cast brass construction with a working pressure of 125 psi.

The valve seat disc plunger body shall be spring loaded so that the valve is normally closed under conditions when the key is not inserted.

B. Top of the valve body receiving the key shall be equipped with ACME threads and smooth face to allow the key to open and close the valve slowly. The quick coupling valve shall be equipped with a vinyl cover.

C. Valve body construction shall be such that the coupler seal washer may be removed from the top for cleaning or replacement without disassembling any other parts of the valve.

D. Keys shall be ACME with 1-inch male thread and 3/4-inch female thread at the top.

E. Contractor shall provide three (3) keys for quick couplers and two (2) 1-inch x 3/4-inch swivel hose ells.

F. Quick coupling valves, keys and swivels shall be manufactured by Hunter Industries, model HQ-44LRC-AW-R, HK-44A and HS-1, Rain Bird 44-LRC, 44K and SH-1 or approved equal.

2.26 ISOLATION VALVES

A. Isolation valves shall be gate type, of bronze construction, US Manufacture, 200 WOG with bronze cross handle and 200 psi rating. Gate valves to be as manufactured by Nibco model 113-K, Apollo model 102T or approved equal.

B. Ball valves for water supply enclosure shall be Nibco, model T-FP-60A or equal.

2.27 SWING JOINTS

A. ½-inch spray sprinklers shall be installed on swing pipe assemblies, minimum length 12 inches and maximum length of 18 inches.

B. Swing pipe operating pressure shall be up to 80 psi with an inside diameter of

0.49 inches, manufactured of low-density polyethylene material meeting ASTM D2104, D2239 and D2737. Swing joint swing pipe and fittings shall be manufactured by Hunter Industries, model FLEXsg, with HSBE-050 and HSBE- 075 fittings or approved equal.

C. ½-inch MPRotator and 3/4-inch small rotary sprinklers shall be installed on 4-elbow swivel joint assemblies, minimum length 8 inches as manufacture by Lasco, Spears or equal.

D. Large rotary sprinklers shall be installed on 1-inch prefabricated PVC unitized swing joint assemblies with double O-ring seals, minimum 315 psi rating and minimum length of 12 inches. Prefabricated PVC swing joints shall be as manufactured by Dura, Lasco or Spears.

E. Quick coupling valves to be installed on 1-inch prefabricated PVC unitized swing joint assemblies with double O-ring seals, minimum 315 psi rating and minimum length of 12 inches with brass insert and stabilizer (unless stabilizer is an integral part of the quick coupling valve). Prefabricated PVC swing joints shall be as manufactured by Dura, Lasco or Spears.

2.28 DISC FILTER

A. Filters at each MPRotator zone valve shall be a plastic filter consisting of a two-piece threaded housing with O-ring seal. The filter screen shall be 140-mesh size.

Filters shall be sized to mid-range flow and not exceed 2.5 psi pressure loss.

B. Filter shall be as manufactured by Netafim, Model DF-xxx-140 or approved equal.

2.29 BACKFLOW PREVENTION DEVICE

A. Reduced pressure backflow prevention device shall be 2 inch, Watts LF009QTS or approved equal.

2.30 BACKFLOW ENCLOSURE

A. Enclosure shall be vandal and weather resistant in nature manufactured with steel components. Enclosure shall be custom manufactured with dimensions of 52 inches long x 18 inches wide x 33 inches high as manufactured by Welch Manufacturing, Chelmsford, MA or approved equal. See detail.

2.31 REMOTE CONTROL

A. Contractor shall provide a remote-control kit compatible with the Hydrowize controller. Kit shall consist of receiver and transmitter as well as carrying case.

B. System shall operate at 27 MHz, 24-volt ac and require 4 AAA batteries. System shall be FCC approved with 2-mile range. System shall have 128 addresses and up to 240 stations. System shall include a large LCD display.

C. Remote system shall have a 3-year warranty.

D. Remote control shall be as manufactured by Hunter Industries, model Roam-XL-

KIT.

2.32 GROUNDING EQUIPMENT

A. Controller installed inside Visitors Center shall be installed with a grounding strap connected to a metal water pipe.

B. Ground strap shall be 1-inch wide by 0.015-inch-thick with punched holes.

Length and hole sizes shall be to NEC requirements.

C. Ground strap shall be as manufactured by ABL Electronic Supplies Inc., model GS-8 or equal.

D. Grounding rod for 2-wire path shall be 5/8-inch x 8-foot copper clad, UL Listed.

E. Grounding plate for surge arrestor decoders shall be 4-inch x 36-inch x 0.06-inch copper with integral connection of 10 feet of #10 AWG insulated, solid copper wire, UL Listed conforming to the minimum requirements of Section 250 of the National Electric Code. Connection of the wire to plate shall be performed by the plate manufacturer.

F. Grounding connections to utilize an exothermic welding process, Cadweld connectors, UL Listed, Model NT1161GPLUS.

G. Grounding wire shall be #10 AWG, solid, bare copper wire for 2-wire paths.

H. Ground enhancement material shall be PowerSet as manufactured by Loresco, 50

lb. bags.

2.33 CONCRETE

A. Concrete for backflow prevention enclosure shall be standard concrete mix in accordance with ASTM C150, ASTM C-33, and ASTM C-94 with a compressive strength (28 days) of 3,000 psi with 1-1/2-inch aggregate.

B. Concrete base size shall be as indicated on the drawings and sited in the specifications.

2.34 CRUSHED STONE

A. 1/2-inch crushed stone shall be washed at the source facility to remove fine-grained soils and shall be well graded within the following limits:

Sieve Size Percent Passing (ASTM D422) by Weight 3/4 inch 100 1/2 inch 90-100 3/8 inch 0-20 No. 4 0-5

2.35 SAND

A. Shall consist of well-graded natural sand, free from organic, other weak or compressible materials, or frozen materials, conforming to the following gradation:

Sieve No. Percent Passing by Weight #8 100 #50 15-40 #100 2-10 #200 0-5

2.36 SPARE PARTS

A. Supply the following tools and equipment to the Owner’s Representative before final observation:

1. Two (2) wrenches or keys for disassembling and adjusting each type of sprinkler provided.

2. Three (3) quick coupler key assemblies.

B. Before final observation can occur, written evidence that the Owner’s Representative has received the tools and equipment must be shown.

PART 3 - EXECUTION

3.01 GENERAL

A. Before irrigation work is commenced, Contractor shall hold a conference with the Owner’s Representative to discuss general details of the work.

B. Examine contract documents applying to this Section noting any discrepancies and bringing the same to the attention of the Owner's Representative for timely resolution.

C. Work indicated on drawings shall be provided whether or not specifically mentioned in the specifications.

D. If there are ambiguities between drawings and specifications, and specific interpretation or clarification is not issued prior to bidding, the interpretation or clarification will be made only by Owner’s Representative and Contractor shall comply with the decisions. In the event the installation contradicts the directions given, the installation shall be corrected by Contractor at no additional cost to the National Park Service.

E. Verify dimensions and grades at job site before work is commenced. Do not proceed with installation of the landscape irrigation system when it is apparent that obstructions or grade differences exist or if conflicts in construction details, legend or specific notes are discovered. Such obstructions, conflicts, or discrepancies shall be brought to the attention of the Owner’s Representative.

F. Make field measurements necessary for the work noting the relationship of the irrigation work to the other trades. Coordinate with other trades (landscaping and other site work trades). Project shall be laid out essentially as indicated on the drawings, making minor adjustments for variations in the planting arrangement.

Major changes shall be reviewed with the Owner’s Representative prior to proceeding.

G. Layout of sprinkler lines indicated on drawings is diagrammatic. Location of sprinkler equipment is contingent upon and subject to integration with other underground utilities. Contractor shall employ data contained in the Contract Documents and shall verify this information at the construction site to confirm the manner by which it relates to the installation.

H. Coordinate installation of sprinkler materials, including pipe, to avoid conflict with trees and plantings.

I. During progress of work, a competent superintendent and assistants necessary shall be on site, satisfactory to the Owner’s Representative. Superintendent shall not be changed, except with the consent of the Owner’s Representative, unless that person proves unsatisfactory and ceases to be employed. The superintendent shall represent the Contractor in his absence and directions given to the superintendent shall be as binding as if given to the Contractor.

J. Protect landscaping, paving, pavers, sidewalks, structures, walls, footings, etc.

from damage. Any inadvertent damage to the work of another trade shall be reported at once.

K. Replace, or repair to the satisfaction of the Owner Representative, existing paving/pavers and sidewalks disturbed during course of work. New paving/pavers, sidewalks shall be the same type, strength, texture, finish, and be equal in every way to removed paving.

3.02 DEMOLITION OF EXISTING SYSTEM

A. Contractor shall be responsible for removing existing sprinklers, quick couplers, controller and valve boxes following/during installation of the new irrigation system. The removed equipment shall be removed from the site and disposed of in a safe and legal manner.

B. Areas where the existing irrigation equipment was located shall have a square piece of sod cut where it exists and will be reused, be filled in with approved material and compacted to grade. Contractor shall provide replacement backfill material for these areas. The sprinkler or quick coupler shall be removed from the swing joint/assembly and the swing joint capped or plugged with a PVC, Schedule 40 threaded cap or slip plug.

C. There are approximately 182 spray sprinklers, 89 rotor sprinklers, 30 valves with associated boxes, a few quick couplers and 1 controller.

3.03 PIPE AND FITTINGS INSTALLATION

A. Using proper equipment, excavate a straight (vertical) and true trench to a depth of 2-inch of pipe invert elevation.

B. Loam or topsoil encountered within the limits of trench excavation for irrigation mains and branch lines shall be carefully removed to the lines and depths as shown on the drawings and stockpiled for subsequent replacement in the upper 6 inches of the trench from which it is excavated. Such removal and replacement of the quantities of loam shall be considered incidental to the irrigation system and no additional compensation will be allowed therefore.

C. Pipe shall be laid on undisturbed trench bottom provided suitable base is available

- no rock or sharp edges; if not, excavate to 2-inch below pipe invert and provide and install sand base or crushed stone upon which to lay pipe.

D. Backfilling shall be accomplished as follows: the first 6-inches of backfill material shall contain no foreign matter and no rock. Carefully place material around pipe and wire and tamp in place. Remainder of backfill shall be laid-up in 6-inch (maximum) lifts and tamped to compaction with mechanical equipment.

Compact backfill in trenches to dry density equal to the adjacent undisturbed soil, and conform to adjacent grades without dips, sunken area, humps, or other irregularities. Frozen material shall not be used for backfill.

E. Make solvent-weld joints in strict accordance with manufacturer's recommendations, making certain not to apply an excess of primer or solvent, and wiping off excess solvent from each connection. Allow welded joints at least 15 minutes set-up/curing time before moving or handling. When the temperature is above 80º F, allow connections to set minimum 24 hours before pulling or pressure is applied to the system. When temperature is below 80º F, follow manufacturer’s recommendations. Provide and install for expansion and contrac-tion as recommended. Wire shall be laid in same trench as mainline and at pipe invert (see Wire Installation).

F. Mainline pipe shall have minimum 22 inches of COVER (excavate to invert as required by pipe size). Lateral pipe shall have minimum 16 inches of COVER for PVC and 12 inches of COVER for polyethylene (excavate to invert as required by pipe size).

G. Cut plastic pipe with handsaw or pipe-cutting tool, removing burrs at cut ends.

Pipe cuts are to be square and true. Bevel cut end as required to conform to Manufacturer's specifications.

H. Every precaution shall be taken to prevent foreign material from entering the pipe while it is being placed in the trench. At times, when installation of the pipe is not in progress, the open end(s) of the pipe shall be closed by a watertight plug or other means. Pipe, which cannot temporarily be joined, shall be sealed to make as watertight as possible. This provision shall apply during the lunch hour as well as overnight. Pipe not to be installed that day shall not be laid out. Should water enter the trench during or after installation of the pipe, no additional pipe may be installed or backfilled until water is removed from the trench. Pipe shall not be installed when water is in the trench, when precipitation is occurring, or when the ambient temperature is at 40º F or below. Pipe installed at temperatures below 40º F shall be removed and replaced at no cost to the Owner. PVC pipe shall be snaked in the trench to accommodate for expansion and contraction due to changes in temperature.

I. In installing irrigation pipe the Contractor shall route the pipe as necessary to prevent damage to tree roots. Where trenching must occur near trees, the Contractor shall provide proper root pruning and sealing methods to roots 1-inch and larger.

J. Maintain 6-inch minimum clearance between sprinkler lines and lines of other trades. Do not install sprinkler lines directly above another line of any kind.

K. Maintain 3-inch minimum between lines which cross at angles of 45 to 90 degrees.

L. Throughout the guarantee period it will be the responsibility of the Contractor to refill trenches that have settled due to incomplete compaction.

3.04 ELECTRICAL WIRE CONDUIT INSTALLATION

A. Electrical conduit shall be installed in non-soil areas, as well as for above ground wiring where wire passes under or through walls, sidewalks and paving/pavers to controller and rain shut-off.

B. Conduit shall extend 18 inches beyond edges of walls and pavement/pavers.

3.05 PIPE SLEEVING INSTALLATION

A. Sleeving shall be installed wherever pipe is going under hardscape areas where indicated on the drawings. Minimum cover over sleeving pipe shall be 24 inches as shown on the detail.

B. Sleeving shall extend 18 inches beyond edges of walls, sidewalks and pavement/pavers. Prior to the installation of irrigation pipe and wiring, the ends of sleeving shall be field marked with a vertical wood stake extending above grade to allow field location at the time of irrigation installation.

C. Be sure required sleeving is installed prior to starting any pavement operations or casting concrete structures which require sleeving to pass through the items.

Review sleeve locations in the field to confirm that sleeves are properly located for the required irrigation pipe runs. In no case, will saw cutting into newly installed pavement/pavers or jacking under new pavement/pavers be permitted to install sleeving which was not installed in proper sequence or in the required orientations or locations.

3.06 ISOLATION VALVE INSTALLATION

A. Install isolation valves per detail where indicated on the drawings. Install isolation valves on a level crushed stone base so that they can be easily opened or closed with the appropriate valve wrench. Install specified valve box over each isolation valve.

B. Check and tighten valve bonnet packing before valve box and backfill installation.

3.07 VALVE BOX INSTALLATION

A. Furnish and install a valve access box for each electric valve, filter, master valve, flow sensor, flush valve, quick coupling valve, isolation valve and wire splice.

B. Valve access boxes shall be installed on a minimum 4-inch crushed stone base.

Finish elevation of boxes shall be at grade. Crushed stone to be supplied by the Contractor and installed before valve box. Crushed stone shall not be poured into previously installed valve boxes.

C. Valve boxes shall be installed neatly. Boxes shall be parallel or perpendicular to hardscape edges and equidistance to other valve boxes installed in the same location. A sufficient amount of turf/landscape shall remain in place between each valve box and between valve boxes and hardscapes

D. Valve box extensions shall be provided as required on valve boxes in order to install valve box covers at grade.

E. Valve box locations shall be in mulched areas where possible a minimum of 10 feet from the walkways. Owner’s Representative shall approve location of valve box locations before installation. This shall consist of them viewing the location and providing the contractor with a verbal or written approval.

F. Bricks, stones, etc. shall not be used to support valve boxes.

3.08 24 VOLT CONTROL VALVE INSTALLATION

A. Control valves shall be installed on a level crushed stone base. Grade of bases shall be consistent throughout the project so that finish grades fall within the limits of work. Valves shall be set plumb with adjusting handle and bolts, screws and wiring accessible through the valve box opening. Valves shall be set in a plumb position with 24-inch minimum maintenance clearance from other equipment.

B. Adjust zone valve operation after installation using flow control device on valve.

3.09 MASTER VALVE/ FLOW SENSOR INSTALLATION

A. Valve and flow meter shall be installed on a level crushed stone base. Valve and flow meter shall be set plumb with bolts, screws and wiring accessible through the valve box opening.

B. Install master valve and flow meter in individual 12-inch standard valve boxes separated per the flow meter…