Specifications-10_Span_Lateral_Move_Irrigation_System.pdf

Solicitation No. AG-32SD-RFQ-14-MD15

Minimum Specifications

10 Span Lateral Move Irrigation System

1. The linear move irrigation system is to have 10 spans of lengths specified in the following and with no overhang at the end. It is to be approximately 1,500 feet long or as close to that length as possible given stock span lengths. A length from 1,476 to 1,500 feet is acceptable. A mixture of longer and shorter spans to achieve the 10-span coverage of 1,500 feet is expected and will be accepted upon approval of the CPRL engineer in charge (Dr. Paul Colaizzi, 806-356-5763) or the lead scientist (Dr. Steve Evett, 806-

356-5775). Shorter span lengths are to be specified for spans 3 and 8 of the ten spans so that height from ground surface to truss rods in the center of the span is maximized. Examples of possible span lengths are in the table below:

Span Number 1 2 3 4 5 6 7 8 9 10

Total length

(ft)

Length

(ft) 156 156 118 156 140 156 156 118 160 160 1,476

Length

(ft) 156 140 137 156 140 156 140 137 160 160 1,482

Length

(ft) 160 160 115 160 140 140 160 115 160 160 1,470

Length

(ft) 160 160 135 160 140 140 140 135 160 160 1,490

Length

(ft) 157 157 113 157 157 157 135 113 168 168 1,482

Length

(ft) 157 135 135 160 135 157 135 135 168 168 1,485

2. Lowest height of truss rods is to be as great as possible (specify minimum clearance above ground surface in bid, but a good target is 16 feet). Permissible ways to achieve this include:

a. Largest diameter wheels available (e.g., 38-inch or larger wheels),

b. Tallest wheel towers available (high clearance tower structure),

c. Truss structure design allowing greater ground to truss rod clearance

d. Quote should specify minimum clearance between the ground and truss rods at the center of each span.

3. Cart carrying motor generator and fuel tank is to be set up to drag 6” diameter polyethylene (PE) hose and to be a four-wheeled cart.

4. Engine generator set is to be diesel powered and at least 20 kW.

5. Guidance system is to be GPS or buried wire. Cable guidance systems are not acceptable.

6. Lateral pipe is to be 6-5/8 inch diameter, hot dip galvanized steel or equivalent.

7. Lateral pipe is to have outlets at 30-inch spacing on the top side of the pipe with 3/4-inch female pipe threads suitable for attachment of goose necks.

8. Polyethylene (PE) drag hose of 6-inch diameter, 400 foot length.

9. Control panel capable of being upgraded with variable rate irrigation package in the future (vendor to specify control panel model).

10. Standard Manufacturer’s warranty.

Solicitation No. AG-32SD-RFQ-14-MD15

Specific tasks to be performed by the vendor include transportation of all components to the west lysimeter fields at the CPRL, assembly of all components into a working system, and start up and test of the system to show that it is functioning, including full and correct function of the guidance system.

The period of performance is 120 days after receipt of purchase order.

GOVERNMENT RESPONSIBILITIES

The USDA will provide access to the site for assembly of the irrigation system, and will participate in final testing to confirm full and correct functioning of the completed system. The contractor will need to comply with laboratory’s procedures in signing in and out when working at the facility.

INSPECTION AND ACCEPTANCE REQUIREMENTS

The completed system will be inspected and approved by the CPRL engineer in charge (Dr. Paul Colaizzi) who will participate in the final testing and validation by the vendor of the fully assembled system. CPRL engineer in charge will be informed of progress and any changes in design or installation.

Testing will include starting of the diesel engine/generator set, starting of the lateral move sprinkler system, and movement of the system under its own power and guidance system once across the entire width of the field and back to the other side of the field.