Attachment_IB_-_Specifications-well.docx

ATTACH MENT IB

Specifications

Install irrigation well to include vertical turbine pump, motor, check va lve,flow meter, flow tube and butterfly va lve

USDA, ARS, PA,

US Meat Anima l Resea rch Center Clay Center, NE

Solicitation No. AG-6538-S-17-0024

Specifications for Irrigation Well

1. Scope:

The U.S.M.A.R.C. has need for construction of 1 cased ini.gation well with the installation of a vertical turbine pump, motor, check valve, flow meter, flowtube and butterfly valve.

Well is to be located near an existing surface water pumping station to enable one of the VFDs at the pumping station to be used for the new ini.gation well pump. The well will provide an additional source of in·igation water when surface water is depleted or is limited. Well piping is to be connected (by others) to existing underground pipe near outlet of the existing surface water pumping station. The VFD controller is sized for a 100 hp motor. With VFD controller, proposed well is to provide 800 to 1600 gpm.

Legal description of well location:

NWl/4 Section 20-T6N-R7W, USMARC designation 28D

Fields will be surveyed and well location identified by USMARC personnel.

Work consists of furnishing all plant, labor, equipment, materials, transp01tation, and supervision in perfonning all operations required for providing the new in·igation well and ve1tical turbine pump and motor.

2. Permits:

The contractor shall obtain all required permits and comply with all applicable regulations of state and local government, and shall make known all his intentions. Pre-permit for the LBNRD has been approved.

3. Well Specifications:

Well drive shall be a 100 hp electric motor. Well capacity shall be the maximum achievable at location and conditions, although it shall not exceed 1600 gpm. To provide sufficient water supply to irrigation pivots, pipeline is to be operated at 40 psi at the pumping station. The capacities of the well and the drawdown measurement shall be those existing at the head of a continuous test. The well shall have an approximate depth of 240 feet dependent upon geologic fo1mation.

During construction, the contractor shall maintain a log showing the geologic fo1mation of the well. This log shall be made available to the Contracting 0fficer' s Representative.

The drilling equipment shall be capable of drilling to a depth of not less than 250 feet through whatever material is encountered.

The casing installed within the hole shall be kept straight, plumb, and concentric within limits that will pennit satisfactmy installation and operation of a line shaft turbine pump at the pumping depth. The contractor shall demonstrate by suitable methods that compliance with the above requirements has been obtained. A well which is unsatisfacto 1y by reason of inaccurate or faulty alignment or negligence of the contractor shall be backfilled and a new well completed at a nearby location at no cost to the Government.

The well casing shall be PVC and shall be adequately sized to achieve the desired pumping rates. It shall have a minimum outside diameter of 16 inches and a minimum inside diameter of 15 inches. It shall be installed in the approximate proportions of 160 feet plain PVC and 80 feet perforated PVC.

The gravel pack shall be designed to conform to the gradation of the water bearing strata and shall be approved prior to the installation. All gravel shall be carefully graded, washed and selected so as to prevent sand pumping. Gravel shall be of rounded materials of durable quality, free from calcareous and flat shale and elongated material. Thickness of the gravel pack shall be not less than 3 inches and generally not more that 9 inches.

The contractor shall furnish all necessaiy pumps, compressors, plungers, or other needed equipment and shall develop the well as necessary to give the maximum yield per feet of drawdown, and extract from the water bearing fmmation the maximum practicable quantity of such sands as may be during the life of the well, be drawn through the gravel pack when the well is pumped under maximum conditions of drawdown.

The contractor shall provide the necessaiy test pump, labor, tools, material, and equipment to test pump the well. The test shall consist of pumping the well to the intended yield with time and pumping levels detennined mutually by the contractor and the Contracting Officer's Representative.

After test pumping is completed, the well shall be capped with a concrete cap or other suitable material.

4. Component Specifications:

A. Well Pumps: The contractor shall furnish and install a new oil lubricated, deep well vertical turbine pump; complete with sufficient stages necessaiy to deliver from 800 to 1600 G.P.M. assuming a pressure of 35 PSI at the top of the pivot. In the event that a system operates more efficiently with a different pressure, the design pressure figure should be used to detennine the stage requirements. The pump bowls shall be installed so that the top of the bowls are approximately 20 feet below the pumping water level at an estimated depth of between 140 - 160 feet. The pumps are to be designed in accordance with the latest standards of the Hydraulic Institute, Ve1tical Turbine Pump Association and AWHA Standard ElOl-61.

Concrete pump foundation shall be included in the bid and installed by contractor. It shall be 4 'x 4' x 6" thick with #4, minimum, rebar reinforcement, 12 " on center, both ways.

B. Pump Bowls: The castings shall be free of blow holes, sand holes and other detrimental defects. The bowls shall be capable of withstanding a hydrostatic pressure equal to twice the pressure at rated capacity or 1 Yz times shutoff head, whichever is greater. Bowls may be equipped with replaceable seal rings on the suction side of impellors appropriate for an electric drive well. The discharge case shall be provided with a means ofreducing to a minimum the leakage of water into the shaft enclosing tube, and must have bypass ports of sufficient area to permit the escape of water that leaks through the seal or bushing. Bowls shall be adjusted for the most efficient pump operation.

C. Impellors: The impellors shall be bronzed, appropriate for a 100 HP VFD controlled vertical turbine pump driven electric motor, and shall be statically balanced. They shall be securely fastened to the impellor shaft with keys, taper bushings, or lock nuts. They shall be adjustable vertically by means of a nut in the pump head.

D. Pump Shaft: The pump shaft shall be turned and ground and it shall be supported by bearings above and below each impellor.

E. Line Shafts: The line shafts shall be ground, of carbon steel (AISI C-1045), and be not less than 1 Yz inches in diameter. The shaft shall be furnished in interchangeable sections having a nominal length of 10 feet. The line shaft shall be coupled with steel couplings, which shall be designed with a safety factor of 1 Yz times the shaft safety factor and shall have a left-hand thread to tighten during pump operation.

F. Line Shaft Bearings: The line shaft beatings, which also have integral couplings, shall be spaced no more than 5 feet apaii. The bearings must contain oil grooves or a separate bypass hole which will readily allow the oil to flow through and lubricate the bearings below.

G. Shaft-enclosing Tube: The shaft enclosing tube shall be made of extra strong steel pipe in interchangeable sections not more that 5 feet in length. The enclosing tube shall be stabilized in the column pipe by stabilizers at least every 10 feet. The oil tube shall be 2 Yz inches in diameter.

H. Discharge Column Pipe: The pipe size shall be such that the friction loss will not exceed 5 feet per 100 feet, based on the rated capacity of the pump. The pipe shall be furnished with interchangeable sections having a nominal length of 10 -20 feet; shall be of standard weight, and shall be connected by threaded sleeve couplings or flanged couplers. The ends of each section of pipe may be faced parallel and machined with threads to pennit ends to butt, or they may be fixed with ASA standard tapered threads if threaded sleeve coupling is bid. Minimum size shall be 1O".

I. Discharge Head Assembly: A tubing tension nut shall be installed in the head to allow tension to be placed on the shaft enclosing tube. Provision must be made for sealing off the threads at the tension nut. The head shall be made of cast-iron or Mechanite free of blow holes, sand holes and other detrimental defects. A check valve will be installed on well to prevent water discharge back into the well. Discharge head assembly shall have an oil port and the capability for drip lubricator mounting. Drip lubricator will be furnished by MARC.

J. Butterfly valve with bolt package - 10". Double flange installation.

K. Flow Meter and flowtube - 10 inch. Shall be the type and quality intended for measuring commercial irrigation pivot water usage. Preference is McCrometer propeller meter. Other manufacturers will be considered.

L. Check Valve - 10 inch.

M. Motor: Motor shall be an inverter duty motor and thus shall be fully compatible with a variable frequency drive (VFD), as stated by the manufacturer. It shall be as manufactured by US Motors, model #15700740- 100 (or more recent, equivalent model), with heater for motor windings, and TEFC.

5. Clean Up:

The work areas shall be cleaned to the satisfaction of the Contracting Officer's Representative, of all debris resulting from the work perfonned.

6. Standard Products:

The pump and motor shall be essentially the standard products of well known and reputable manufacturers so that prompt and continuing service and delive1y of repair parts may be assured. The component parts of the units need not be products of the same manufacturer.

7. Submittals: Contractor shall submit descriptive literature on all material submitted. Approval shall be given by the owner prior to the contractor ordering any material.

8. Warranty:

A three-year warranty shall be provided on new well and pump/motor construction.