The project purpose is to upgrade the complete irrigation system and to isolate each field so they can operate independently of one another. The work includes the installation of new irrigation heads, piping, valves, controllers, and other necessary components to ensure a fully operational irrigation system. The contractor will switch from the existing hydraulic heads to standard mechanical heads manufactured by Rainbird or equal. All piping will be schedule 40. Scope of Work: 1. Provide a detailed sketch of the proposed irrigation system. Field record drawings for City staff to input into GIS. 2. Isolate each field so they can operate independently of one another. Valves designed and set up with none being shared with another adjacent field set up. 3. Mainline System Shutoff Valve: Comply with local code and requirements. A. Winterization: Comply with local code and requirements. B. Backflow Prevention Assembly C. Master Valve Assembly D. Flow Sensor Assembly E. Isolation Gate Valve Assembly: Provide a separate valve box over a 3-inch depth of ¾ inch gravel for each assembly. 4. Removal of existing hydraulic irrigation heads. 5. Installation of new irrigation heads, piping, valves, controllers, and other necessary components to ensure a fully operational irrigation system. The contractor will switch from the existing hydraulic heads to standard mechanical heads manufactured by Rainbird or equal. All piping will be schedule 40. Irrigation heads must provide head to head coverage. 6. Rainbird Controller ESP-LXIVM, Modular upgrade to include modular station capacity, flow sensing, metal case and pedestal, and IQ4G Central Control Communication. combination of 6504 rotors and 8005 rotors, and PGA-IVM Series Valves. 7. Primary surge protection arrestors as recommended by controller manufacturer. A. Valve output surge protection arrestors as recommended by controller manufacturer. B. Electrical line conditioner as recommended by controller manufacturer. C. Lightning protection: Provide 8-foot copper-clad grounding rod at controller location. Use AWG 8 bare copper wire between the controller and grounding rod. D. Switch/outlet:120 VAC, 15-amp combination switch/GFCI outlet. 8. Control Wire (2-wire system) A. AWG 14 solid copper, Type UF or PE cable, UL approved for direct underground burial from the controller unit to each remote-control valve.
