A06_Final_Specifications_0002.pdf

Technical Specifications for

MCFO 9 WELLS

BUREAU OF LAND MANAGEMENT

111 Garryowen Road

Miles City, Montana 59301

Modification 2: April 24, 2023

PROJECT SPECIFICATIONS

TABLE OF CONTENTS

Specification Page No

TABLE OF CONTENTS

GENERAL REQUIREMENTS

MT-01009 General Information and Requirements ............................................01009(1-6) MT-01505 Mobilization.......................................................................................01505(1-2)

SITE WORK

MT-02670 Water Wells ......................................................................................02670 (1-3) MT-02671 Well Drilling and Casing ..................................................................02671 (1-8) MT-02672 Well Testing .....................................................................................02672 (1-3) MT-Work Data Sheet ........................................................................................... WDS (1-2)

GENERAL INFORMATION AND REQUIREMENTS

MCFO 9 WELLS 01009-1

SPECIFICATION 01009

PART 1: GENERAL

1.1 SUMMARY:

A. Description of Work: Furnishing labor, equipment, supplies, and materials to construct nine

(9) livestock wells.

B. Location: Work under this Contract is located in Prairie and Custer Counties, Montana.

The work locations are shown on the Drawings.

C. Work Data Sheet: Designates the type and quantity of work required at the project location, and dimensions required for typical drawings.

D. Stipulations for Period of Performance: With the exception of the Hoffer Well, no on-site work shall occur until after July 15, 2023, to protect any ground nesting migratory birds in the project area. On-site work shall cease between December 1, 2023, and March 31, 2024, to minimize impacts to wintering big game species for the Red Hill, Cedars, Madden, and both McMullin Wells. The Notice to Proceed may be issued prior to this date at the Contracting Officer’s (CO) discretion to allow for the ordering of products, submittal approvals, and other work not associated with the work involved at the actual sites.

E. All work done under this contract will be performed by a contractor currently licensed and in good standing with the Montana Board of Water Well Contractors.

F. All water well work done under this contract will be completed in a manner as to meet or exceed the current Administrative Rules of Montana (ARM) Construction Standards.

1.2 REFERENCES:

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms: Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/standards referred to herein may be procured by the Contractor, from the following:

ASTM American Society for Testing and Materials

P.O. Box C700 West Conshohocken, PA 19428-2959

NSF National Sanitation Foundation P.O. Box 130140 Ann Arbor, MI 48105

MCFO 9 WELLS 01009-2

DNRC Montana Dept. of Natural Resources and Conservation P.O. Box 201601 Helena, MT 59620-2801

ARM Montana Administrative Rules Services P.O. Box 202801 Helena, MT 59620-2801

AWWA American Water Works Association 666 West Quincy Avenue Denver, CO 80235

OSHA Occupational Safety and Health Administration Standards U.S. Department of Labor Occupational Safety and Health Administration Denver Area Office 333 West Colfax Avenue Denver, CO 80204

1.3 SUBMITTALS:

A. Scope: Submittals include schedules, product data, manufacturer's literature, safety data sheets, yield test results, well completion reports, and well log reports.

B. Requirements: Refer to specifications for submittals required. Allow at least five (5) working days for review. Submittals shall be delivered to Contracting Officer's Representative (COR).

C. The CO may permit use, prior to sampling and testing, of materials when accompanied by

Certificates of Conformance. Materials used on the basis of Certificate of Conformance may be sampled and tested. Installation of materials on the basis of Certificates of Conformance shall not relieve the Contractor of responsibility for incorporating materials which conform to the requirements of the drawings and specifications. Material not conforming to those requirements will be subject to rejection, whether in place or not.

D. Format: The form of the Certificate of Conformance provided by the supplier shall be as follows:

1. The certificate shall state that the named product conforms to the Contract requirements.

2. The certificate shall either be accompanied with a certified copy of the test results or certify that such test results are on file with the manufacturer and will be furnished to the CO upon request.

3. The certificate shall provide the name and address of the manufacturer, the testing

MCFO 9 WELLS 01009-3

agency, and the date of tests.

4. The certificate shall set forth the means of identification which will permit field determination of the product delivered as being the product covered by the certificate.

E. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

1.4 QUALITY ASSURANCE:

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This Contract incorporates materials, applications, and tests by reference, with the same force and effect as when they were given in full text.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

1.5 DELIVERY, STORAGE, AND HANDLING:

A. Delivery: The Contractor shall protect products, incorporated into the work, from damage while in transit to the site. Products must be delivered in original unopened containers with manufacturer's name and brand designation and contents legibly indicated.

B. Storage: The Contractor shall provide temporary storage for products which will protect them from theft or damage until installation on the project and final acceptance. Storage shall comply with the manufacturer’s instructions. The storage area shall permit access for inspection and handling.

C. Handling: The Contractor shall load and unload products in such a manner that protects them from damage until installation on the project.

1.6 PROJECT/SITE CONDITIONS:

A. Access to the Work:

1. Access to the work site shall be provided by and at the Contractor's expense.

2. Access to the work shall be by existing roads and trails. Exceptions must be provided in writing by the CO.

MCFO 9 WELLS 01009-4

3. Public or private roads damaged by the Contractor shall be restored at the Contractor's expense to the same condition they were in at the commencement of work.

4. Access construction shall be done only with written approval from the CO.

5. Survey monuments or markers disturbed or removed during construction shall be reset at the Contractor’s expense.

B. Environmental Considerations:

1. The Contractor shall exercise care to prevent unnecessary surface disturbance of the work areas (including areas for storage of materials, parking, staging, and camping areas) and shall be confined to areas approved by the CO.

2. In the event the surrounding landscape is disturbed, the Contractor shall restore that area at the Contractor's expense.

3. The Contractor shall not travel cross-country when ground is wet enough to cause rutting to a depth of four (4) inches or greater and any cross-country travel must be approved by the CO.

1.7 SEQUENCING AND SCHEDULING:

A. Work Schedule: The schedule shall be submitted at the pre-work conference. When requested, the Contractor shall submit an updated schedule within three (3) working days.

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

3.1 PROJECT MEETINGS:

A. Prework Conference:

1. A prework conference will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date, and place. The purpose will be to review required work, project drawings, specifications, construction schedules, payroll, payments, and administrative provisions of the Contract.

2. Attendance: The Contractor, subcontractors, and the persons responsible for coordination of the work shall be present at the meeting.

4. Presentation: The Contractor shall be prepared to summarize and explain procedures planned for the project and present the submittals as requested in the specifications.

MCFO 9 WELLS 01009-5

B. Progress Meetings:

1. Location: Meetings shall be held at the project site or as determined by the CO.

2. Notification: Meetings may be called by either the CO or the Contractor. Request shall state who should attend and include an agenda.

C. Final Inspection:

1. Location: Meeting shall be held at the project site, or as determined by the CO.

2. Notification: The Contractor shall notify the Project Inspector (PI) or COR at least three (3) working days prior to the completion date so the Government can schedule the final inspection.

3. The Contractor shall require the superintendent to be present during this inspection.

3.2 PROTECTION OF EXISTING PROPERTIES

A. General

1. Take precautions to protect all adjoining private and public property and facilities, including underground and overhead utilities, structures, and fences. Restore or replace all disturbed or damaged facilities to its original condition at Contractor’s expense to include all fees associated with the locates, taking necessary steps and precautions to protect buried utilities.

2. Contact utility owners using the Montana One Call System for utility locates before starting work. The Contractor is also responsible for ensuring that all private utilities are located within the work area. Protect the utilities exposed during the work and prevent damaging underground utilities adjacent to excavations. Immediately notify the utility owner of any construction damage. Repairs of damage to utilities are at the expense of the Contractor.

3.3 WORK LAYOUT:

A. The Government will set a location marker at each site.

3.4 SALVAGEABLE ITEMS:

A. Identification of salvageable items shall be done by the CO.

B. Salvageable items shall become the property of the Government. Remove and store items at locations and as directed by the CO. The Contractor shall replace or reimburse the Government for items lost or destroyed during removal.

MCFO 9 WELLS 01009-6

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section will be made. The

Contractor shall include consideration for this item in the quote value price for other scheduled items of the Contract.

END OF SPECIFICATION

MOBILIZATION

MCFO 9 WELLS 01505-1

SPECIFICATION 01505

A. Section Includes: Preparatory work and operations, including those necessary to the movement of personnel, equipment, supplies and incidentals to the project site; and for other work and operations which must be performed or costs incurred prior to beginning work on the various items on the project site. This specification does not include moves between project sites.

PART 3: EXECUTION

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

A. Units: Progress payments will be made as follows:

1. When 5 percent of the original contract amount is earned from other bid items, 50 percent of the amount bid for mobilization or 5 percent of the original contract amount, whichever is lesser, will be paid.

2. When 10 percent of the original contract amount is earned from other bid items, 100 percent of the amount bid for mobilization or 10 percent of the original contract amount, whichever is lesser, will be paid.

3. Upon completion of work for the project, payment of the amount bid for mobilization in excess of 10 percent of the original contract amount, will be paid.

4. The total sum of all payments shall not exceed the original contract amount bid for mobilization, regardless of the fact that the contractor may have shut down the work on the project or moved equipment away from the project and then back again.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for moves between project sites will be made. The Contractor shall include consideration for moves between project sites in the Schedule Of Items (SOI)

MCFO 9 WELLS 01505-2

for other items of the Contract. Prices and payment will be full compensation for the work described in this section. No modification and adjustments shall be allowed for costs and changes to mobilization despite changes in fuel or transportation costs. Payment will be made under:

Pay Item Pay Unit 01505(1) Mobilization ..................................................................................................... Lump Sum

WATER WELLS

MCFO 9 WELLS 02670-1

SPECIFICATION 02670

A. Specification Includes: Record keeping, capping of well, disinfection of well, well logging, and well abandonment.

1.2 SUBMITTALS:

A. General: Submittals shall be according to Specification 01009 - General Information and

Requirements.

B. Records: Final well logs and reports described in this specification shall be furnished to the

Contracting Officer (CO) upon completion of the well.

PART 2: PRODUCTS

2.1 CONTRACTOR FURNISHED MATERIALS:

A. Bentonite: Granular bentonite shall be WYO-BEN’s Grout well or approved equal. Pellet bentonite shall be American Colloid Vol Clay or approved equal.

B. Well cap or sanitary well seal designed to prevent pollutants from entering the well.

PART 3: EXECUTION

3.1 WELL LOG AND SAMPLES:

A. Well Log: The Contractor shall keep a complete well log as required by State law, and shall check formations and enter the results in the log for each apparent change in material and at intervals not to exceed 10 ft. The log of the well shall show material penetrated and full descriptive notes made of each stratum found by the drill and difficulties, or unusual conditions met in drilling. Water-bearing strata shall be described in detail as to loose or compact material, color, and if gravel, whether it is water-worn or angular. The presence of clay shall be noted. The log must be kept up-to-date with the progress of the well drilling and shall be available for inspection. Furnish one copy of the complete log to the CO after completion of drilling.

B. Information for State Filing: Furnish the CO with a copy of the drilling information required by State law for filing on water wells and prepare and submit reports required of the driller by State law.

MCFO 9 WELLS 02670-2

3.2 DISINFECTION:

A. Stock Water Wells: Disinfect by mixing the appropriate amount of disinfectant (from table below) and pouring into PVC casing prior to capping well.

B. Chlorine Solution: Prepare and apply chlorine solutions according to the following table:

Chlorine Compound Required to Dose 100 Feet of Water-Filled Well at 100 ppm Casing Diameter

(Inches) Area of Casing

(Sq. In.)

Volume Per 100

Feet (Gallons)

5.25% Purex Clorox

(liquid measure)

Calcium Hypochlorite (dry measure)

4 12.56 65.3 1 pint 0.08 pounds

4.5 15.90 73.46 2.25 cups 0.069 pounds 5 19.63 102.0 3 cups 0.132 pounds 6 28.27 146.9 1 quart 0.19 pounds

C. Disinfection of Test Pump and Equipment: When the test pump or other equipment is installed after the well has been disinfected, wash the parts of the test pump or equipment that will be placed in the well.

3.3 ABANDONMENT OF THE WELL:

A. Abandonment Due to the Contractor's Actions: When the drilled well must be abandoned because of the actions of the Contractor, including but not limited to lost tools, damaged well, misalignment, or other causes attributed to careless or poor workmanship, pull casing (if installed) that can be removed. Plug the hole according to State regulations and requirements. The Contractor shall then drill a new well within 100 ft. of the original well.

B. Abandonment Due to Other Causes: When the well must be abandoned because of inadequate quantity or quality of the water, or for another reason not the fault of the Contractor, pull the casing (if installed) that can be removed. If casing cannot be pulled, cut casing off 3 ft. below grade and plug the hole according to State regulations and requirements. The order to abandon the well must be in writing from the CO. The abandonment must be witnessed by the CO.

3.4 SANITARY PROTECTION OF WELL:

A. General: The Contractor shall protect the well during the construction period to prevent tampering or seepage of contaminated water, petroleum products, or other contaminants into the well from the ground surface.

B. Seal: When the well is completed, install a cap or sanitary well seal designed to prevent pollutants from entering the well. Seal or screen off equipment openings that permit direct access to the well to prevent entrance of foreign matter or contaminates.

C. Grading: Slope the ground immediately surrounding the top of the well casing away from

MCFO 9 WELLS 02670-3

the well in all directions. May need to add a minimum 10% grade. See Water Well Detail Drawing.

D. Correcting Contamination: If the well becomes contaminated, or water with undesirable physical or chemical characteristics enters the well due to the neglect of the Contractor, corrective work including the supplying of casing, seals, sterilizing agents, or other materials necessary to prevent contamination of the aquifers shall be performed at the Contractor's expense.

A. General:

1. Rig or Standby time will not be paid for.

2. No payment will be made for drilling, installing casing, removing casing, or the plugging of a well abandoned due to the Contractor's actions.

3. No payment will be made for record keeping, disinfection of the well or furnishing and installing the cap or compression seal. The Contractor shall include consideration for these items in the bid price for other items of the Contract.

B. Units:

1. Payment will be made for furnishing and installing materials for the quantity abandoned due to causes not the fault of the Contractor and will be paid under the appropriate line item in Specification 02371 – Well Drilling and Casing.

A. Payment: No direct payment for the work described under this section will be made for abandonment of well due to Contractor’s actions.

WELL DRILLING AND CASING

MCFO 9 WELLS 02671-1

SPECIFICATION 02671

WELL DRILLLING AND CASING

A. Specification Includes: Drilling water wells and installing Contractor furnished property in water wells.

1.2 REFERENCES:

A. American Society for Testing and Materials (ASTM):

ASTM A53 Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless ASTM D2466 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 ASTM D2564 Standard Specification for Solvent Cements for Poly(Vinyl Chloride)

(PVC) Plastic Piping Systems.

ASTM D2855 Standard Practice for Two-Step (Primer and Solvent Cement) Method of

Joining Poly(Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Pipe and Piping Components with Tapered Sockets.

ASTM F480 Thermoplastic Well Casing Pipe and Couplings Made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80.

ASTM F656 Primers for use in Solvent Cement Joints of Poly(Vinyl chloride) (PVC) Plastic Pipe and Fittings.

B. NSF National Sanitation Foundation P.O. Box 130140 Ann Arbor, MI 48105

C. ARM Montana Administrative Rules Services P.O. Box 202801 Helena, MT 59620-2801

D. AWS American Welding Society, Inc P.O. Box 351040 Miami, FL 33135

1.3 SUBMITTALS:

A. Certification: Furnish written certification from the manufacturer certifying that the

Contractor-furnished property conforms to the requirements of this specification.

Submittals shall be according to Specification 01009 - General Information and Requirements.

MCFO 9 WELLS 02671-2

B. Records: The Contractor shall prepare a well log report form for each well drilled. The

Contractor shall file each well log report (Form No. 603) with the Contracting Officer (CO) and the Ground Water Information Center (GWIC) of the Montana Bureau of Mines and Geology (MBMG) within 60 days of completing the well.

C. Information for State Filing: The Contractor shall furnish the CO with a copy of the drilling information required by the Montana Department of Natural Resources and Conservation (DNRC) for filing on water wells.

1.4 PROJECT CONDITIONS:

A. Well Depth and Material Quantities: Well depth and material quantities listed in the Work

Data Sheet (WDS) and Schedule of Items (SOI) are estimates. The final determination of depth and material quantities will be made in the field and will depend on actual geological conditions encountered during the drilling operation. The CO shall have the option of ordering abandonment of a well at any point during the drilling operation. Well abandonment shall be in accordance with Specification 02670 - Water Wells.

1.5 SCHEDULING:

A. Drilling Program: At the Pre-Work Conference, the Contractor shall submit to the CO for approval a complete and practicable drilling program. The program shall provide for orderly performance of the work and be in such form and detail as to show the following for each well:

1. Sequence of drilling operations.

2. The days of the week and month that work is to be performed.

3. The number and length of each shift per day. The length of a shift may be extended in the field as required to avoid interrupting a drilling and testing operation.

4. Type of rig and support equipment.

5. Plan for disposal of waste.

6. Mud (and/or air) program (list of additives, mixing rate) if applicable.

7. Materials list and specifications (casing, slotted casing, well screen, gravel pack, grout, disinfectant, and any other materials incorporated into the project).

8. Drilling water source.

MCFO 9 WELLS 02671-3

2.1 CONTRACTOR FURNISHED MATERIALS:

A. Casing: Materials specified shall be new and free from defects. However, if the contractor deems it necessary or desirable to use temporary casing, the casing may be used, subject to the approval of the CO.

B. PVC Solid Casing: 4-1/2 inch (5 inch for Cedars Well) schedule 40 belled end, solvent weld casing conforming to ASTM F480.

C. PVC Slotted Casing: 4-1/2 inch (5 inch for Cedars Well) schedule 40 belled end, solvent weld, 43 slots/foot, 2.125 inches long inside, 0.025 inch slot width, 0.250 inch spacing with slots cut in 4 rows around pipe.

D. PVC Caps and Couplings: Schedule 40 for 4-1/2 inch (5 inch for Cedars Well) solid and slotted casing.

E. PVC Solvents: Certified by manufacturer for use on type I PVC pipe under conditions existing at worksite at time of application. Certified by NSF for potable water systems.

Primer and cement conform to ASTM F656 and D2564 respectively.

F. Screws: Sheet metal or self-tapping type. Maximum length 5/8 inch for schedule 40 PVC casing. Screws shall not protrude inside casing.

G. Medium Chip Bentonite: For surface casing and annulus of well casing. High swelling, medium chipped 1/4 inch to 1/2 inch, chemically unaltered. WYO-BEN Enviro Plug Medium for comparison.

H. Bentonite Grout: For annulus of well casing. Polymer free, high swelling with soils with solids contents of 20%. Permeability not to exceed 0.0000001 cm/sec. WYO-BEN’S – Grout Well, American Colloid’s - Volclay Grout for comparison.

I. Drilling Fluid Additives: A NSF drinking water approved sodium or ammonium base, biodegradable foaming agent (“High Foam” or an approved equal) will be allowed for air-rotary drilling. If other additives are required the Contractor shall submit manufacturer's literature describing the properties of the additive, mix proportions, application methods, and reason for use, prior to use to the CO for approval.

J. Gravel Pack: 10-20 sand, 95% silica, roundness and sphericity of 0.6 to 0.8, washed and screened by US standard sieve sizes.

K. Well Seal: Fits inside 8 inch (10 inch for Cedars Well) steel surface casing, painted, split cast iron with 1-1/4 inch hole for drop pipe and with styrene butadiene rubber gasket.

MCFO 9 WELLS 02671-4

L. Steel Surface Casing: Eight (8) inch (10 inch for Cedars Well), 0.250 wall thickness, single random lengths.

M. Gear Clamps: 7 inch gear clamps to secure centering guides.

N. Casing Centralizers: Shall be stainless steel, or a CO approved alternate, sized to fit the casing and the borehole placed on the bottom, top, and through the screened interval and spaced not more than 20 feet apart.

2.2 EQUIPMENT:

A. Drilling Equipment: Except as otherwise specified herein, type of drilling equipment shall be determined by driller (Contractor).

B. Drill Bits: The pilot hole shall be drilled using a drag bit. However, a roller bit will be permitted for drilling through hard, well cemented formations. A roller bit shall be used to ream the pilot hole to full size. Either a drag or roller bit may be used to drill the hole for the surface casing.

C. Minimum Equipment: The Contractor shall furnish equipment of sufficient size and in sufficient quantities to drill 1-1/2 times the estimated drilling depth of the deepest well listed in the Work Data Sheet (WDS).

D. Air Volume Requirement: (Air-Rotary Drilling): Contractors intending to use air-rotary drilling equipment should be aware of the volume of air required to maintain proper up-hole velocity to lift the drill cuttings from the bore hole under various conditions. The volume of air produced by an on-rig compressor, or in conjunction with auxiliary compressors shall be sufficient to lift drill cuttings to the ground surface for the size and estimated depth (1-1/2 times the estimated depth) of the bore holes shown on the WDS.

E. Well Development: Well development methodology and equipment (jetting, surging, surge block, swabbing, etc.) shall be approved by the CO.

PART 3: EXECUTION

3.1 INSTALLATION:

A. Drilling Location: Drill the well at the location staked.

B. Order of Drilling: The drilling of the well hole shall be done in two steps. A pilot hole will be drilled and then reamed. The CO must witness drilling of pilot hole. Drilling shall continue until water of adequate quality and quantity has been encountered or that unfavorable conditions require well abandonment. If drilling results are favorable for

MCFO 9 WELLS 02671-5

completing well, Contractor shall then ream the pilot hole to full size to the required depth.

C. Work Time Limits: Drilling of pilot hole shall be accomplished within a continuous 48 hour period. Reaming, casing installation, and gravel pack placement shall begin within 24 hours of completion of pilot hole drilling, and shall all be done within one continuous work day. Where formations are stable such as hard sand stones and shales, reaming may be allowed to a specific depth and will not count as part of the 24 hour completion requirement. Failure to comply with these time limits shall be sufficient cause to abandon hole due to Contractor's actions in accordance with Specification 02670 - Water Wells.

D. Well Log and Samples: Shall be taken in accordance with Specification 02670 -Water

Wells.

E. Hole Size:

1. The pilot hole shall be a minimum of one inch larger in diameter than the drill rod collars, and a maximum of 6-1/4 inches in diameter.

2. The final full-sized reamed hole shall be a minimum 7-7/8 inches in diameter, except the Cedars Well that shall be a minimum 8-3/4 inches in diameter.

3. The hole for 8 inch surface casing shall be 11 inches in diameter in all wells except the

Cedars Well which shall be minimum 13 inches in diameter to accommodate 10 inch steel surface casing.

F. Estimated Drilling Depth: As shown on WDS

G. Using Piolet Hole as Test Well: If the Contractor drills a pilot hole and encounters water, the CO, after considering all the evidence, shall determine whether to deepen the hole, enlarge the hole to the size specified, or to abandon the well.

H. Drilling Fluid Additives: The Contractor shall not use drilling fluid additives unless they have been pre-approved.

I. Recirculation and Mud Drilling: Drilling methods which require circulation of mud or recirculation of drilling fluids will be permitted when flowing sands are encountered or if the bore hole does not stand open.

J. Depth of Casing: Casing depth will also be determined in the field and will be based on well log results and Contractor’s log.

K. Backfill: If in the process of locating water-bearing zones, the well was drilled deeper than needed, Contractor shall backfill well to the bottom of the lowest water-bearing strata with an impervious material. Material must provide firm support for casing.

MCFO 9 WELLS 02671-6

L. Hole Cleanliness: The drilled hole shall be kept clean to prevent plugging off small yields of water. Sufficient compressed air, and water as needed, shall be circulated to prevent cuttings from booting or caking walls of hole. Circulation shall be established before drilling begins and shall be maintained throughout the drilling process. The return of cuttings to ground surface shall be continuous. When drilling stops, circulation shall be maintained until all cuttings have returned to ground surface. Failure to maintain a clean hole shall be sufficient cause to abandon hole due to Contractor's actions in accordance with Specification 02670 - Water Wells.

M. Surface Casing Installation: Surface casing shall extend 18 inches above finished ground surface and installed to the minimum depth required by the Administrative Rules of Montana (ARM). The bottom three feet of the surface casing shall be driven into place.

Top of casing shall be square and evenly cut and free of burrs, mushrooming, and torch slag. Additional lengths of surface casing may be required where caving soils are encountered. Casing joints shall be watertight according to ARM 36.21.642.

N. PVC Well Casing Assembly: PVC well casing, joints, and fittings shall be assembled in accordance with the casing and cement manufacturer's instructions and ASTM specification D2855. If screws are used, the screws shall not protrude through the inside wall of the casing. Predrill holes for screws. Casing joints shall be watertight.

O. PVC Well Casing Installation: The joined casing string shall be installed in a predrilled hole. Casing shall not be dropped onto the bottom of the well hole, nor forced down against the bottom of the hold during installation. Casing shall be lowered into place with the drilling machine utilizing clamps, elevators, or other mechanical devices.

1. Well casing shall extend to within 4 to 12 inches below top of surface casing.

2. A PVC cap shall be solvent welded to bottom of the casing.

P. Water-Bearing Strata: If it is necessary to extend casing through developable water-bearing zones, the portion of the casing opposite the water bearing zones shall be screened or sealed off as determined in the field by the CO.

Q. Gravel Packing: Install gravel-pack material in the annular space between the drilled hole and the casing from the bottom of the slotted casing to a level 10 feet above the slotted casing.

1. Pouring: Place gravel by pouring down the open hole. Contractor shall provide a wire or rope with a weighted end and prove gravel is reaching the bottom. The weight shall be used as a feeler and continuously pulled up as gravel accumulates from the bottom

up. If bridging occurs, Contractor shall immediately cease from pouring, correct the situation and try again. If bridging occurs again Contractor shall complete the job

MCFO 9 WELLS 02671-7

using a tremie pipe. If booting occurred during the reaming process, the Contractor shall insure the annulus is clean and free of material before pouring gravel. The CO has the right to order the use of tremie pipe at any time during the gravel packing process.

2. Tremie Pipe: Place material with a tremie pipe. As the pack material is being placed, the tremie pipe shall be raised in such a manner that the free fall of gravel-pack material below the bottom of the pipe does not exceed 21 feet. Use the tremie pipe to prove gravel is reaching the bottom.

R. Medium Chip Bentonite: Placement of chips shall be done in accordance with the manufacturer’s instructions for pouring. Place chips by pouring into annulus on top of gravel. Provide a wire or rope with a weighted end and prove chips are reaching the bottom.

The weighted rope or wire shall be used as a feeler and continuously pulled up as chips accumulate from the bottom up. If bridging occurs, Contractor shall immediately cease from pouring, correct the situation and try again. If bridging cannot be corrected, Contractor shall use bentonite grout.

S. Bentonite Grout: Mixing of grout shall be based on manufacturers recommendations. The mixing instructions shall be explicitly followed. Volclay Grout, Grout Well, or approved equal shall be mixed at 20% solids ratio. The Contractor shall measure water with an acceptable measuring device. A minimum of two 50 lb. bags of medium chip bentonite shall be poured on top of gravel pack or shale trap before grout is pumped.

3.2 FIELD QUALITY CONTROL:

A. Alignment: If Contractor is not able to install the PVC casing due to poor vertical alignment, the Contractor will be responsible to correct the deficiencies at no additional cost to the Government.

B. Preliminary Well Testing: The Contractor shall make a preliminary yield test, as specified in Specification 02672 - Well Testing, on each water bearing zone penetrated. If water in adequate quantity and quality is obtained the well shall be cased and developed.

3.3 PROTECTION:

A. Drilling Waste: Slope the drill cuttings surrounding the top of the well casing away from the well in all directions at a minimum 10% grade.

B. Drilling Fluid and Water: Drilling fluids containing chemicals of any kind, including muddy water consisting of sediment and suspended sediment, shall be directed away from streams and surface bodies of water. Drilling fluids shall not come into contact with any streams, streambeds, or surface bodies of water. The Contractor is responsible for the cleanup of any streams, streambeds, or surface bodies of water that come into contact with drilling fluid

MCFO 9 WELLS 02671-8

chemicals, including muddy and dirty water, and the costs associated thereof.

C. Abandonment of the Well: Shall be in accordance with Specification 02670 - Water Wells.

D. Sanitary Protection: Shall be in accordance with Specification 02670 - Water Wells.

A. Units: Drilling the well hole and PVC well casing will be measured and paid for per linear foot. Drilling shall be measured from the ground surface to the bottom of the drilled hole.

Any portion of a well hole that is not reamed will be paid for at half the bid price for drilling the well hole. Drilling to set surface casing shall not be measured separately. Steel surface casing will be measured and paid for per linear foot of surface casing installed. Gravel pack, and medium chip bentonite will be measured and paid for per 50 pounds installed to the nearest 50 pounds. Stand by time will not be paid for sterilization retention time, for water-level recovery periods, for pumping test delays, for time outside of regular working shifts, for weekend or holiday periods or for time spent maintaining equipment.

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be based on the following pay items:

Pay Item Pay Unit 02671(1) Drilling Well Hole ........................................................................................... Linear Foot 02671(2) Install 8 inch Steel Surface Casing .................................................................. Linear Foot 20671(2a) Install 10 inch Steel Surface Casing .............................................................. Linear Foot 02671(3) Install 4-1/2 inch PVC Solid and Slotted Well Casing ................................... Linear Foot 02671(3a) Install 5 inch PVC Solid and Slotted Well Casing ........................................ Linear Foot 02671(4) Gravel Pack (50 lb. Bag) ............................................................................................Each 02671(5) Medium Chip Bentonite (50 lb. Bag) .........................................................................Each

WELL TESTING

MCFO 9 WELLS 02672-1

SPECIFICATION 02672

A. Specification Includes: Well development and testing.

PART 2: PRODUCTS

2.1 EQUIPMENT

A. Well Testing and Developing Equipment: Equipment must at a minimum be able to test and develop the well at one and one half the estimated yield at the maximum depth listed in the Work Data Sheet (WDS). The following equipment shall be on site.

1. Pump Testing Equipment: Pump shall be capable of pumping a minimum of 7 gal/min at maximum depth of the deepest well. Pumping unit shall be equipped with a hose and valve to regulate the flow for the purpose of establishing yields at various depths.

2. Air Method: Furnish air compressors, hoses, air lines, and any other equipment needed for the air method.

PART 3: EXECUTION

3.1 PRELIMINARY YIELD TESTING OF THE WELL:

A. General: The Contractor shall make a preliminary yield test during drilling operation on each water-bearing zone penetrated. Tests may be conducted by air lift, or pump. If the air lift method yields inconclusive results, the Contractor shall pump the open pilot hole provided the formations are stable and there is no indication of sloughing or squeezing.

3.2 WELL DEVELOPMENT:

A. General: Well development methodology (jetting, surging, surge block, swabbing, etc.)

shall be approved by the contracting officer. The Contractor shall be cognizant of the collapse strength of the casing and hydraulic conditions of the well in order to perform well development in a manner as to not compromise the casing and well. After the well has been completely constructed and all drilling fluids and additives removed from the well, each exposed water-bearing zone targeted for water production shall be developed. The length of time of development shall be determined by the contractor dependent on the type of water-bearing formation encountered. The Contractor shall develop the well until the produced

MCFO 9 WELLS 02672-2

water does not contain appreciable amounts of sand, silt, or turbidity.

1. Air Development: All wells where yield tests exceed 7 GPM.

2. Pump Development: All wells where yield tests are less than 7 GPM.

3.3 FINAL YIELD TESTING OF THE WELL:

A. General: After the well has been completely constructed, developed, and cleaned, the

Contractor shall make a final yield test.

B. Yield Test Procedure:

1. Measure and record the depth from the ground surface to the static water level in the well.

2. Test with equipment used in development. Every well shall be tested for yield and drawdown for a period of not less than 1 hour either by bailing, pumping, or air testing.

During testing, discharge rate shall be as uniform as possible.

3. Divert and measure the flow of water through a metering or collection system capable of measuring accurately to within 1/4 gallon/minute. Take a minimum of one test every 10 minutes.

4. Record minimum data according to State standards and regulations.

A. General: For information and bid purposes only, estimated total time of development and testing at 2 hours per well. Rig or standby time will not be paid for. No payment will be made for time spent developing and testing wells which occur prior to the well being completed (cased, gravel packed and sealed). Time utilized in assembling, servicing, repairing equipment or any other nonproductive time shall not be paid.

B. Units: Progress payments will be made as follows:

1. For each well completed (cased, packed, and sealed), fully developed, and final yield test completed, one nineth of the lump sum will be paid.

2. The total sum of all payments shall not exceed the original contract amount bid for well development and testing, regardless of additional wells being drilled after

MCFO 9 WELLS 02672-3

abandonment of wells due to Contractor’s actions.

3. If additional wells are drilled due to abandonment and not the fault of the contractor, additional payment is at the discretion of the CO.

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be based on the following pay item:

Pay Item Pay Unit 02672(1) Well Development and Testing ................................................................................ Each

PROJECT PROJECT NO. PROJECT LOCATION ALLOTMENT FORMATION ESTIMATED YIELD (GPM)

MIN. YIELD (GPM) TO

DEVELOP

MAX DRILL DEPTH

(LIN FT) REMARKS

MCMULLIN WELL 3 023392 T15N, R45E, SEC 23 MCMULLIN AMP

125TGRV-TONGUE RIVER MEMBER

OF THE FT. UNION FM. 3-15 GPM 6 GPM 185 REDRILL - CASING FAILURE

SE1/4 NW1/4 SW1/4 LOCATION STAKED AT SITE

MCMULLIN WELL 5 023305 T14N, R46E, SEC 17 MCMULLIN AMP

125TGRV-TONGUE RIVER MEMBER

OF THE FT. UNION FM. 3-20 GPM 5 GPM 440 NEW WELL - LOCATION STAKED AT SITE

NE1/4 SE1/4 NE1/4

B & V WELL 001181 T16N, R47E, SEC 35 CHAPMAN 125FRUN - FORT UNION 3-12 GPM 4 GPM 250 NEW WELL - LOCATION STAKED AT SITE

NW1/4 NW1/4 SE1/4

REDHILL WELL 023310 T12N, R56E, SEC 24 BLANKENSHIP

211FXHL - FOX HILLS FORMATION OR

SANDSTONE 6-8 GPM 4 GPM 200 NEW WELL - LOCATION STAKED AT SITE

NE 1/4 NW1/4 NW1/4

SHEEP WELL 022642 T15N, R47E, SEC 28

BIG SHEEP

MOUNTAIN

125TGRV-TONGUE RIVER MEMBER

OF THE FT. UNION FM. 4-15 GPM 6 GPM 300 NEW WELL - LOCATION STAKED AT SITE

NW1/4 SW1/4 SW1/4

HOFFER WELL 419910 T11N, R55E, SEC 9 HOFFER 125FRUN - FORT UNION 3-15 GPM 3 GPM 310 REDRILL - CASING FAILURE

NW1/4 SE1/4 NW1/4 LOCATION STAKED AT SITE

NO WATER WELL 023309 T12N, R48E, SEC 4 SANDHILL

125TGRV-TONGUE RIVER MEMBER

OF THE FT. UNION FM. 3-9 GPM 3 GPM 260 NEW WELL - LOCATION STAKED AT SITE

SW1/4SE1/4SE1/4

CEDARS WELL 023307 T13N R 51E SEC 4 COTTONWOOD 125FRUN - FORT UNION 2-10 GPM 3 GPM 530 NEW WELL - LOCATION STAKED AT SITE

NW1/4SW1/4NW1/4

MADDEN WELL 023308 T14N, R51E, SEC 14 JOANNE MADDEN 125FRUN - FORT UNION 5-15 GPM 5 GPM 300 NEW WELL - LOCATION STAKED AT SITE

SW1/4SE1/4NE1/4 LEASE

WORK DATA SHEET

MCFO 9 WELLS

WELL QUANTITY BREAKOUT

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WDS-1

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PROJECT PROJECT NO.

INSTALL WELL DEPTH

(LIN FT)

INSTALL 8 INCH

STEEL (LIN FT) INSTALL PVC SOLID CASING (LIN FT)

INSTALL PVC SLOTTED

CASING (LIN FT)

GRAVEL PACK

MATERIAL (50 LBS)

WELL CASING

BENTONITE (50 LBS)

SURFACE CASING

BENTONITE (50 LBS)

INSTALL 10 INCH STEEL

(LIN FT)

MCMULLIN WELL 3 023392 185 40 145 40 36 2 24 0

MCMULLIN WELL 5 023305 440 30 400 40 24 2 15 0

B & V WELL 001181 250 27 210 40 36 2 12 0

REDHILL WELL 023310 200 27 170 30 18 2 12 0

SHEEP WELL 022642 300 27 260 40 36 2 12 0

HOFFER WELL 419910 310 27 270 40 36 2 12 0

NO WATER WELL 023309 260 40 200 60 92 2 24 0

CEDARS WELL 023307 530 0 490 40 202 2 12 27

MADDEN WELL 023308 300 30 260 40 36 2 15 0

1) All Wells, except Hoffer - Construction shall not start before July 15, 2023.

2) McMullin Well 3 - The minimum acceptable yield to develop the well is 6 GPM, but must be supplemented with power to pump 24 hours to achieve supply required for existing pipeline. Target yield is 12 GPM at 145'. If water is found at 145', pilot hole should still be drilled to 185' to look for another producing zone to increase yield. All producing zones should be developed. The screens may be split to maximize length across alternating shale and sandstone. Construction shall cease prior to Dec 1, 2023.

3) McMullin Well 5- The minimum acceptable yield to develop the well is 5 GPM with solar power. Construction shall cease prior to Dec 1, 2023.

4) B & V Well- The minimum acceptable yield is 4 GPM powered by solar for 85 head in pasture. Target yield is 8 GPM at 230', powered by solar, to connect to existing pipeline. The screens may be split to maximize length across alternating shale and sandstone.

5) Redhill Well - The minimum acceptable yield to develop the well is 4 GPM. Drilling shall stop when 20 feet of solid shale is encountered. Construction shall cease prior to Dec 1, 2023.

6) Sheep Well - Minimum yield of 6 GPM preferred, develop well if yield is 3 GPM or greater at target depth. Any rate less than 6 GPM would require additional power to pump 24 hours to meet demand. The pilot hole should be drilled to 300' unless excessive water is found before max depth. This will be a redundant source for an existing pipeline. The screens may be split to maximize length across alternating shale and sandstone.

7) Hoffer Well - The minimum acceptable yield to develop the well is 3 GPM with solar power. The screens may be split to maximize length across alternating shale and sandstone.

8) No Water Well - Minimum yield of 8 GPM is preferred, develop well if yield is 3 GPM or greater at target depth. Any rate less than 8 GPM would require additional power to pump 24 hours to meet demand. Sufficient water should be found around 40 ft, but piolet hole should drill to max depth and all producing zones should be developed. For all producing zones to be developed, gravel is needed to fill the annulus from bottom of lowest producing zone to top of highest producing zone.

9) Cedars Well - The minimum acceptable yield is 3 GPM. This is the only well to be completed with 5" PVC. Even if sufficient water is found around a target elevation of 2430 ft, the pilot hole should be drilled to max depth and all producing zones should be developed. Construction sall cease prior to Dec 1, 2023.

10) Madden Well - Minimum yield required is 5 GPM. If water is not found at estimated depth, drill pilot hole to total depth of 355 ft for primary location and 325 ft for alternate location.

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WDS-2

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