ADDENDUM NO 3 ARFQ DEP27-01 - AML - Mcalpin (Lambert) Landslide.pdf

AGENCY SOLICITATION NUMBER – ARFQ ______________

Addendum Number: ____

The Purpose of this addendum is to modify the solicitation identified as (“Agency Solicitation”) to reflect the change(s) identified and described below.

Applicable Addendum Category:

[ ] Modify bid opening date and time

[ ] Modify specification of product or service being sought

[ ] Attachment of vendor questions and responses

[ ] Attachment of pre-bid sign-in sheet

[ ] Correction of error

[ ] Other

Description of Modification to Solicitation:

This Addendum issued to publish and distribute the attached documentation to the vendor community.

Additional Documentation: Documentation related to this Addendum (if any) has been included herewith as Attachment A and is specifically incorporated herein by reference.

Terms and Conditions:

1. All provision of the Agency Solicitation and other addenda not modified herein shall remain in full force and effect.

2. Vendor should acknowledge receipt of all addenda issued for this Agency Solicitation by completing an Addendum Acknowledgement, a copy of which is included herewith. Failure to acknowledge addenda may result in bid disqualification. The addendum acknowledgement should be submitted with the bid to expedite document processing.

DEP2700000001

1. To publish vendor questions and answers

2. To publish revised specifications

3. To publish clarifications, notes, and changes.

Addendum #3

McAlpin (Lambert) Landslide

ARFQ 0313 DEP27000000001

The following are questions that were identified at the Pre-Bid Conference (PBC) conducted on-site on August 5, 2026, questions provided to the West Virginia Department of Environmental

Protections (WVDEP) Procurement, Project Clarifications, Project Notes, Project changes, Technical Specification Changes, and Project Plan Changes. The answers and clarifications provided herein take precedence over verbal answers at the PBC and previously provided specifications and descriptions provided in the Solicitation should there be any conflicts between the two.

QUESTIONS AND ANSWERS

Q1. Specification Section 18.2.6 specifies 12-inch diameter Schedule 80 PVC Bell-End Pipe.

Section 18.5.3; however, states that the 12-inch Schedule 80 PVC Conveyance Pipe pay item "shall include the 12-inch SCH 80 HDPE Conveyance Pipe." Bid Item 39 also identifies the material as 12-Inch SCH 80 PVC Conveyance Pipe. Question: Please confirm that Schedule 80 PVC is the required conveyance pipe material for Bid Item

39.

A1. Schedule 80 PVC is the required conveyance pipe material for Bid Item 39. Section

18.5.3 has been revised and is included in this addendum

Q2. Bid Item 34 provides 450 LF of 12-inch Diameter PVC Cased Dewatering Borehole.

Specification Section 9.3.1 states that one dewatering borehole is sufficient at each location and that the second hole is intended as a spare, with the Engineer determining after completion of the first boring whether the second is required.

Question: Please clarify how Bid Item 34 will be measured and paid if the Engineer directs construction of additional/spare boreholes beyond the quantity necessary for the initially required holes?

A2. The listed quantity of 450 LF includes what would be needed for four holes if it is determined that each location needed two holes. However, the contractor will only be paid for the amount drilled after field determination by the engineer.

Q3. Bid Item 27 provides a quantity of 4 VF for Type B Inlet with Splash Pad, while the plans identify multiple inlet locations. Specification Section 7.4.6 states that the inlet is measured vertically from the top of the inside structure floor to the top of finished grate. Question: Please confirm that the total bid quantity of 4 VF is correct or if the line item is to be paid at 4 EA. If paid by VF, please identify the intended payable vertical-foot quantity at each inlet location?

A3. There is only one Type B inlet (DI-A1) shown on the project drawings. The 4 VF is correct.

Q4. Specification Section 18.2.6 identifies the conveyance pipe as 12-inch diameter

Schedule 80 PVC Bell-End Pipe. The solicitation bid schedule likewise identifies Bid

Item 39 as 12-Inch SCH 80 PVC Conveyance Pipe. However, Section 18.5.3 states that the PVC pay item "shall include the 12-inch SCH 80 HDPE Conveyance Pipe."

The same section subsequently refers again to PVC pipe, PVC perforations, centralizers, and grouting of the annulus between the PVC pipe and steel casing.

ATTACHMENT A

Question: Please confirm that the required material for Bid Item 39 is 12-inch

Schedule 80 PVC conveyance pipe, as identified in the bid schedule and Section

18.2.6, and that the reference to HDPE in Section 18.5.3 is not applicable?

A4. Refer to answer A1 above.

Q5. Section 9.3.1 states that mining-history information is limited, estimates an approximately 90-acre mine complex, and uses an estimated recharge rate of approximately 45 gpm. The Contractor is responsible for selecting the actual dewatering rate and must reduce the mine pool to approximately one foot or less above the mine floor prior to HDD work. Question: Please provide any available current or historical information regarding the following. If no additional information is available beyond the contract documents, please confirm.

• mine-pool elevations or piezometer readings

• previous pumping or drawdown tests

• observed mine recharge

• mine-water pH

• iron, manganese, acidity/alkalinity, total suspended solids or other available water-quality data

• previous treatment records associated with this mine pool.

A5. The most recent piezometer reading summary is included in this addendum. There is no additional information available for the other listed items.

Q6. Bid Item 30, Mine Dewatering, is a lump-sum item that includes all materials, labor, equipment and incidentals necessary to perform the work. The Contractor determines the pumping rate, and HDD into the flooded mine is prohibited.

Question: Please confirm the point at which the Contractor's lump-sum Mine

Dewatering obligation is considered complete. Specifically, does Bid Item 30 include continuous or intermittent pumping necessary to maintain base-flow conditions through completion of both HDD installations, or is the lump-sum dewatering obligation complete once the initial mine pool has been reduced to the specified level?

A6. Bid Item 30 includes continuous or intermittent dewatering for mine recharge through the HDD process until the HDD installations are completed and functional.

Q7. Section 9.3.2 requires treatment to maintain mine-water pH between 6.0 and 9.0 and makes the Contractor responsible for monitoring the discharge for compliance with the Clean Water Act and WVDEP Construction Stormwater Permit.

Question: Please identify the required mine-water monitoring parameters, sampling frequency, sampling locations, analytical methods, reporting requirements, and whether laboratory analytical testing is required during mine dewatering/HDD operations. Also please clarify whether costs for any required laboratory water-quality analyses are incidental to Bid Item 30 or payable under another item?

A7. The contractor will monitor pH onsite (no laboratory tests required) on an hourly basis during dewatering at the discharge outlet of the temporary treatment trap. A running log of measurements including but not limited to time, dewatering flowrate, and pH must be kept. No other laboratory water quality tests are required. Payment will be incidental to Bid Item 30.

Q8. The bid schedule includes 500 bags of Soda Ash Briquettes, 30 Floc Logs, and 30 tons of Landfill Tipping Fee. Question: Please confirm that the listed quantities are estimated quantities and that actual approved quantities of soda ash briquettes, floc logs, and treatment precipitate disposal required to complete the work will be measured and paid at the respective contract unit prices, including quantities above those shown in the bid schedule?

A8. The quantities in the bid schedule are estimated. Variances should be discussed with the engineer’s onsite representative who will monitor the actual quantities used during the treatment process. The contractor will be paid for what is used per their unit prices in the bid.

Q9. The specifications identify the project's Construction Stormwater General Permit registration as WV0115924 and state that the successful Contractor will become

Co-Applicant #2. The construction-plan public-notice detail appears to identify a different stormwater permit/registration number. Question: Please confirm the current and controlling National Pollutant Discharge Elimination System (NPDES)

Construction Stormwater Permit/registration number for this project and identify the permit documents that bidders should use for estimating compliance, inspection, monitoring and reporting requirements.

A9. The specifications only identify West Virginia’s NPDES Storm Water Construction

General Permit as WV0115924. However, this project’s specific registration number under that permit is WVR113180. The successful contractor will be required to become Co-Applicant #1 of this registration and abide by the requirements therein. The WVDEP-AML will be Co-Applicant #2. This information has been included in a revised section VI of the specifications and is included in this addendum.

Q10. Does the BOP have to be utilized for the entire duration of the HDD Bores?

A10. The BOP needs to remain in place until the mine is considered dewatered. Once the mine is considered dewatered in accordance with “Section 9.0 Mine

Dewatering” technical specifications (e.g. lowered to and maintained to 1 foot or less of water from the mine floor), the Contractor has the option of removing the

BOP device.

Q11. After Pilot hole is drilled and engineer confirms proper alignment, would the contractor be permitted to use a traditional Jack & Bore Machine with a modified guided head that will chase the pilot bore hole?

A11. Yes

Q12. Does the “RMRS” have to be used during the HDD Bores in conjunction with a wireline or gyro guidance system or is it intended to be used after the pilot hole is completed to check alignment?

A12. The RMRS system is to be utilized in conjunction with the wireline or gyro guidance system during advancement of the pilot hole to guide the pilot hole to the required destination.

ARFQ 0313 DEP27000000001

Q13. Can the Steel Casing be welded or does it have to be threaded?

A13. Due to the lengths of the borings, threaded 16-Inch ID steel casing is preferred;

however, the Contractor may use welded 16-Inch ID Steel Casing.

Q14. If we are able to get a conventional bore machine that is Directional Drill capable, is the use of a BOP required?

A14. Yes, the BOP is required until the mine is satisfactorily dewatered in accordance with the “Mine Dewatering” specifications.

Q15. If we decide to use the 20” Steel casing conductor pipe, does it have to remain in the ground permanently or can it be removed if needed?

A15. The 20-inch threaded steel conductor pipe is not a required component of the HDD system but can be utilized by the Contractor to facilitate their drilling operations.

It is not required to remain in place permanently and can be removed as needed so long as its removal does not compromise the 16-Inch ID Steel Casing or the 12-inch

SCH 80 PVC Conveyance Pipe.

PRE-BID QUESTIONS AND ANSWERS

N/A

REVISED SPECIFICATIONS

1. Revised table of contents section 18.0

2. Revised Technical Specifications section VI

3. Revised Technical Specifications section VII (pg. 7) to correct sign template.

4. Revised Technical Specifications section 18.5.3

REVISED DRAWINGS

N/A

CLARIFICATIONS, NOTES, AND CHANGES

1. A list of required contract submittals is included as part of this addendum

2. Updated Piezometer readings

REVISED BID SCHEDULE (Submitted separately)

N/A

PRE-BID SIGN IN SHEETS

N/A

ATTACHMENT 1

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026

6.0 REVEGETATION

7.0 DRAINAGE STRUCTURES

8.0 UNCLASSIFIED EXCAVATION

9.0 MINE DEWATERING

10.0 UTILITIES

11.0 ASPHALT PAVING - SECTION NOT USED

12.0 INJECTION HOLE DRILLING - SECTION NOT USED

13.0 SUBSURFACE INJECTION - SECTION NOT USED

14.0 CONFIRMATION DRILLING - SECTION NOT USED

15.0 BORE HOLE PHOTOGRAPHY - SECTION NOT USED

16.0 TEST BORING LOGS

17.0 TRAFFIC CONTROL

18.0 HORIZONTAL DIRECTIONAL DRILLING

19.0 ADMINISTRATION COST

ATTACHMENT 2

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026 Page 3

9. Site Monitoring: Borrow (disposal) activities will be monitored by the state to ensure compliance with contractual requirements, applicable federal, state, and local laws, and any permit conditions.

IV. DISPOSAL OF UNSUITABLE MATERIAL

All waste areas shall be obtained in accordance with Section III of the Special Provisions

(Borrow/Disposal Areas) of these Specifications. All unsuitable materials (wood, trash, debris, and garbage) as determined by the Engineer shall be wasted by the Contractor, at his/her expense, outside the limits of work conforming to the requirements of Section 4.3.8 of these Specifications. Wood may be burned in conformity with Section 4.3.7 of these

Specifications.

The Contractor shall observe the NEPA compliance schedule relative to selecting and utilizing any off-site disposal areas in accordance with Section III of the Special Provisions of these Specifications.

V. PERMITS, LICENSES AND FEES

WVDEP-AML will initiate the West Virginia Division of Highways (WVDOH) MM-109

Permit and the Construction Storm Water General Permit from the WVDEP Division of

Water and Waste Management (WVDEP DWWM). The Contractor shall procure any other necessary permits and licenses, pay all charges and fees, and give all notices necessary and incidental to the due and lawful prosecution of the work. Other permits required for this project may include but not be limited to a burning permit from West Virginia Division of

Forestry and WVDEP Office of Air Quality. A copy of the permit/permits as procured shall be furnished to the WVDEP-AML prior to initiation of the work under this Contract.

VI. NPDES STORMWATER REQUIREMENTS

WVDEP-AML has obtained a Construction Storm Water General Permit for this project from the WVDEP DWWM. The registration for this reclamation project will be modified to include the Contractor as Co-Applicant #1, with the WVDEP-AML being

Co-Applicant #2. As such, the Contractor shall assume responsibility for compliance with the terms and conditions of the permit including modifications and any future correspondence such as registration renewal invoices, inspection reports, and notices of violation shall be forwarded to the Contractor. Upon award of the contract, the Contractor shall complete a Co-Applicant #2 signature page and submit the completed form to

WVDEP-AML prior to scheduling a Pre-Construction Conference.

Upon receipt of the completed form, WVDEP-AML will request the WVDEP DWWM to modify the existing National Pollutant Discharge Elimination System (NPDES) registration for this project to make the Contractor the Co-Applicant #1 to the permit.

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026 Page 4

The WVDEP DWWM will notify the Contractor and WVDEP-AML when the successful transfer of registration WVR113180 under West Virginia /NPDES Storm Water

Construction General Permit (No. WV0115924) is completed. A Notice to Proceed will not be issued until the Contractor signs the co-applicant form and submits it to the Office of Abandoned Mine Lands. Once the transfer has been completed, the WVDEP will continue to be responsible for any modification fees and annual renewal fees incurred up until the date of the Final Inspection of the project that occurs after completion of construction activities at the site. The Contractor shall be responsible for any and all costs associated with violations and fines assessed against the project that are a result of the

Contractor’s negligence, carelessness, or failure to install permanent controls as part of the work as scheduled.

The WVDEP shall apply for a Notice of Termination (NOT) from WVDEP DWWM via the Construction Storm Water website:

http://www.dep.wv.gov/Programs/stormwater/csw/Documents/Construction upon completion of construction activities at the site. The NOT shall be issued by WVDEP

DWWM upon completion of the project. The Contractor will continue to be bound by the terms and conditions of the permit until the NOT has been approved by WVDEP DWWM.

Once the project is complete, the Contractor will still bear responsibility for the NPDES registration until a NOT is received from the WVDEP DWWM.

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026 Page 5

Co-Applicant #1 Signature Page

Co-Applicant #1: _____________________________________________

New and/or Modification of NPDES Storm Water of Construction Project Name:

BY COMPLETING AND SUBMITTING THIS APPLICATION, I HAVE REVIEWED AND UNDERSTAND AND

AGREE TO THE TERMS AND CONDITIONS OF THE GENERAL PERMIT (WV0115924) ISSUED ON MARCH

6, 2024, WITH AN EFFECTIVE DATE OF APRIL 6, 2024, AND EXPIRATION DATE OF APRIL 5, 2029. I

UNDERSTAND THAT PROVISIONS OF THE PERMIT ARE ENFORCEABLE BY LAW, VIOLATION OF ANY

TERM AND CONDITION OF THE GENERAL PERMIT AND /OR OTHER APPLICABLE LAW OR

REGULATIONS CAN LEAD TO ENFORCEMENT ACTION.

I CERTIFY UNDER PENALTY OF LAW THAT I HAVE PERSONALLY EXAMINED AND AM FAMILIAR

WITH THE INFORMATION SUBMITTED ON THIS FORM AND ALL ATTACHMENTS AND THAT, BASED

ON MY INQUIRING OF THOSE INDIVIDUALS IMMEDIATELY RESPONSIBLE FOR OBTAINING THE

INFORMATION. THE INFORMATION SUBMITTED IS, TO THE BEST OF MY KNOWLEDGE AND BELIEF, TRUE, ACCURATE, AND COMPLETE. I AM AWARE THAT THERE ARE SIGNIFICANT PENALTIES FOR

SUBMITTING FALSE INFORMATION, INCLUDING THE POSSIBILITY OF FINE AND IMPRISONMENT.

(CO-APPLICANT #1 SIGNATURE) DATE

Print Name: ___________________________________________

Print Title: ___________________________________________

Address: ___________________________________________

City: _____________________State: _______ Zip:___________

Telephone Number: (____)________-____________________

Email: ______________________________________________

FEIN: ______________________________________________

ATTACHMENT 3

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026 Page 6

VII. CONSTRUCTION SIGN

1. Work Required.

The work to be performed under this section consists of providing all labor, material, and equipment necessary to install a project sign as indicated on the detail included herein and as specified herein.

2. Materials.

(a) The sign face shall be 3/4-inch Marine Exterior plywood or aluminum or composite material. Posts and cross-brace shall be No. 2 Grade Pine or Fir, kiln dried and pressure treated.

(b) Hardware:

(i) All hardware shall be manufactured from good, commercial-quality material and meet all applicable ASTM standards.

(ii) Spikes and nails shall be common wire-type and shall meet AISI steel specifications 1010 or 1020.

(iii) All hardware shall be hot-dipped galvanized in accordance with

ASTM A-153.

3. Execution.

(a) Project Sign. The sign board shall be cut to the dimensions shown on the detail herein. The sign shall be painted with one coat of primer and two coats of white enamel. All exterior cut edges shall be smooth sanded prior to painting. All edges shall be double primed. The letters, border and strips shall be painted as shown on the detail drawing. Posts and cross-brace shall be painted with two finished coats of brown enamel.

The Contractor shall bolt the sign to posts and provide required cross-bracing. The posts shall be set in gravel base and sign erected, as shown on the drawing. One sign is required and is to be located at the discretion of the Inspector.

(b) Payment. Payment for the work, which shall include installation of the project sign, shall be part of the lump-sum bid for "Mobilization".

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026 Page 7

ATTACHMENT 4

Construction Specifications, McAlpin (Lambert) Landslide (0102-22-0181-300), June 17, 2026 Page 103

HDD pilot hold to within ± 1-foot of the target locations, the proposed drill-through

BOP or “air-rubber” system, valving, fittings, drilling tools, etc., necessary to extend the HDD pilot hole to the target location.

18.5.2 The Method of Measurement and Basis of Payment for the “16-inch ID Steel

Casing” shall be full compensation for furnishing and boring 16-inch ID threaded steel pipes (perforated and non-perforated); cribbing for supporting and guiding the

16-inch ID steel casing to the indicated locations; cutting off casing pipes;

disposing of cuttings; grout, bentonite mixture/slurry, knife valve, casing valve and formation packer, all materials, labor, tools, equipment, and other incidentals necessary to complete the work as shown on the plans and herein specified. The costs associated with grouting the anulus of the 16-inch ID steel casing pipe, including grout baskets, and perforating the 16-inch ID steel casing pipe where indicated, shall be incidental to the cost of the 16-inch ID steel casing pipe. If the

Contractor opts to utilize a larger diameter conductor pipe to surround the 16-inch

ID steel casing pipe to facilitate installation of the 16-inch ID steel casing pipe through the softer soil and rock material or otherwise improve the HDD drilling operation, the cost of the installation of the conductor piping including drilling, installation, and annulus grouting (including grout baskets) shall be included in the per linear foot pricing for the 16-inch ID steel casing pipe.

18.5.3 The Method of Measurement and Basis of Payment for the “12-inch SCH 80 PVC

Conveyance Pipe” shall include the 12-inch SCH 80 PVC Conveyance Pipe and all the material and equipment necessary to complete the installation of the perforated and solid conveyance pipe into the receiving drainage structure. The centralizers and pipe perforations are incidental to the installation of the “12-inch SCH 80 PVC

Conveyance Pipe”. The costs associated with grouting the annulus between the

12-inch SCH 80 PVC conveyance pipe and the 16-inch ID steel casing pipe

(including grout baskets) and perforating the 12-inch SCH 80 PVC conveyance pipe where indicated shall be incidental to the cost of the “12-inch SCH 80 PVC

Conveyance Pipe”

18.6 Pay Items

Item 18.1 “Pilot Hole”, per linear foot.

Item 18.3 “16-Inch ID Steel Casing”, per linear foot.

Item 18.4 “12-Inch SCH 80 PVC Conveyance Pipe”, per linear foot.

ATTACHMENT 5

McAlpin (Lambert) Landslide – ARFQ 0313 DEP27000000001

Required Contract Submittals

Contract Submittal Number Item Description BABA Certification Required

4.2.2 Tree Wound Dressing, if required Yes

4.2.3 Access Road Stone No

4.2.4 Gravel Drive Rehabilitation Stone No

4.2.5 Stabilization Stone, if required No

4.2.6 Concrete Paving No

4.2.7 Separation Fabric Yes

4.2.8 Stabilization Fabric, if required Yes

4.2.9 Bituminous Pavement Yes

5.2.1 Sediment Control Barriers Yes

5.4.2 Stabilized Construction Entrance Stone and Separation Fabric No

5.4.3 Rolled Erosion Control Products Yes

6.2.1 Fertilizer Yes

6.2.2 Lime Yes

6.2.3 Seed Mixtures Yes

6.2.4 Mulch Material No

7.2.2 Filter Fabric Yes

7.2 12-inch PVC SDR 35 Underdrain Pipe Yes

7.2.3 Rock Riprap No

7.2.4 HDPE Pipe Yes

7.2.5 Pipe Bedding No

7.2.6 Type B Drop Inlets (structure, frame, grate, gasket, sealer) Yes

7.2.7 Non-Calcareous Underdrain Stone and Underdrain Cleanouts No

9.2 Mine Dewatering Plan No

9.2.1 Soda Ash Briquettes Yes

9.2.2 Floc Logs Yes

9.2.3 1,000-Gallon Polyethylene Tank Yes

9.2.4 12-inch PVC Casing Yes

18.2.1 16-inch ID Steel Casing Pipe Yes

18.2.4 Grout No

18.2.6 12-inch SCH 80 PVC Conveyance Pipe Yes

18.2.7 Mechanical Centralizers Yes

18.2.8 Grout Basket Yes

18.2.10 Animal Guards Yes

ATTACHMENT 6

McAlpin (Lambert)

BORING DATE Depth (Ft) Elevation

(ft)

Deepest Elevation of Bore (ft)

Water Level From Surface

(ft)

Water Depth From Pavement

(ft) Water Elevation

(ft)

10/24/2023 86.4 1322.2 1235.8 71.60 14.8 1250.6

11/3/2023 86.4 1322.2 1235.8 70.95 15.5 1251.2

11/17/2023 86.4 1322.2 1235.8 71.03 15.4 1251.2

12/5/2024 86.4 1322.2 1235.8 72.00 14.4 1250.2

7/22/2025 86.4 1322.2 1235.8 67.7 18.7 1254.5

8/5/2026 86.4 1322.2 1235.8 68.40 18.0 1253.8

10/24/2023 82.9 1322.1 1239.2 71.30 11.6 1250.8

11/3/2023 82.9 1322.1 1239.2 70.94 12.0 1251.2

11/17/2023 82.9 1322.1 1239.2 71.23 11.7 1250.9

12/5/2024 82.9 1322.1 1239.2 72.40 10.5 1249.7

7/22/2025 82.9 1322.1 1239.2 67.60 15.3 1254.5

8/5/2026 82.9 1322.1 1239.2 68.40 14.5 1253.7

10/24/2024 88.0 1330.5 1242.5 79.0 9.0 1251.5

12/5/2024 88.0 1330.5 1242.5 81.9 6.1 1248.6

12/5/2024 88.0 1330.5 1242.5 76.0 12.1 1254.5

8/5/2026 88.0 1330.5 1242.5 76.5 11.5 1254.0

B-6

B-5

B-11