12905B21q0062 - Turf Research Pop-Sprinkler Irrigation System - Maricopa, Az

Project consists of twelve controllable plots of 27’ by 324’ with rotator sprinkler heads installed spaced 27’ apart. Mainline should be 3-inch PVC. First plot is 50 ‘from mainline on concrete pump/filter pad. The 180o sprinklers should emit 1.58 gallons per minute (gpm) and the 90o sprinklers should emit 0.76 gpm at an operating pressure of 30 psi. Water application rate should be 0.48 inch per hour. Existing main line has a flow meter and disc filter. Two-wire valves should be installed in the ground on the east side of the plots (plots run east-west). USDA has existing 5 Hp pump with 110 gpm flow at 32 psi (85 gpm at 42 psi) and an existing dual sand filter and an automated back-flush system and a Baseline 3200 controller and bicoders. This system is an expansion of the first phase of three plots.

Division 32 -

Exterior Improvements, Operation and Maintenance of Exterior Improvements, Irrigation, Planting Irrigation, Planting, Planting Preparation, Soil Preparation, Landscape Grading.