ADDENDUM NO 2 ARFQ DEP26-06 DREWS CREEK A HIGHWALL.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.

Addendum #2 Drews Creek A Highwall

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The following are questions that were identified at the Pre-Bid Conference (PBC) conducted on-site on August 21, 2025, questions provided to the 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. Can you confirm the ID/OD, Wall thickness, and grade of pipe being requested for the 509 LF 20” casing?

A1. The 509 LF of 20” casing shall have ID equal to 19 inches, OD equal to 20 inches, Wall thickness equal to 0.5 inches. The casing shall meet the requirements of ASTM A252

Schedule 30, Grade 3.

PRE-BID QUESTIONS AND ANSWERS

Q2. What are the lengths and diameters of the bores?

A2. The lengths of the two bores are approximately 223 LF and 286 LF. The diameter of the pilot holes for each bore are 8 inches. The diameter of the casing to be bored & jacked is 20 inches.

Q3. Will the access to the site be upgraded?

A3. The access road to the site may be repaired as needed under the bid item

“4.2 GRAVEL DRIVE REHABILITATION.” The bid schedule quantity has been increased from 125 TONS to 500 TONS to accommodate such repairs along the length of the access road from the stabilized construction entrance at the church to the project site. Excavation of the entire road length for repairs is not expected to be needed and is not in the NPDES permit. If such work is determined to be required, the Contractor shall notify the WVDEP so a modification to the NPDESpermit can be made.

Q4. How long will it take to dewater the mine pool?

A4. Based on an assumption of 50,000,000 gallons to be passed through the sediment bags from one borehole, with an assumed flow rate of +/- 900 gpm, we anticipate the dewatering with sediment bags to take approximately 40 days. With two pilot holes dewatering, the time may be shortened to 20 days.

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Q5. Do we have to have personnel on site throughout the duration of the dewatering operation?

A5. 24/7 monitoring during dewatering for the entire duration of dewatering operations is not required once dewatering is under control. The contractor shall monitor as required to provide for proper operation of the sediment bag filtration system.

Q6. What happens if you bore it and doesn’t hit the void?

A6. The target coordinates and elevations for the pilot holes are provided on the

Plans. If the Contractor does not hit the target with the pilot hole, the hole shall be drilled again at the Contractor’s cost. The Contractor may choose to first verify the target coordinates and elevations at the existing piezometers at the Contractor’s cost.

Q7. Are we replacing the wet seal and is it a bid item?

A7. The replacement for the failed wet seal and the installation of a grout filled fabric channel to convey the mine water from that wet seal to Drews Creek are listed as optional. The WVDEP will determine if the traditional wet seal is necessary based on field conditions after the two 12-inch diameter C900

PVC pipes are installed and functioning as designed.

Q8. Are we pulling the valve and casing or leaving it after we drill?

A8. The valve may be recovered. The 20” casing bore and jack is a separate operation to follow dewatering through the 8” pilot hole and 12” valve. The

20” steel casing along with the 12-inch conveyance pipe will remain in place to serve as the permanent wet seal.

Q9. Is there a closer road for access?

A9. There is an existing road from WV-99, but that road is outside the construction limits for the project. Access for this project will be from the church (as was for Phase I), as reflected in the plans.

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Q10. Are we just treating the water with the bags?

A10. If necessary, the discharge from the sediment bags shall be treated for pH to be within the specified range of pH 6 to pH 9 with the provided “12.5

SODA ASH BRIQUETTES (50 LB BAG)” bid item before discharge into the stream. pH treatment is not internal to the bags.

Q11. Will more bags be added if one bag does not have capacity for the flow?

A11. It is not anticipated that the mine water from the two dewatering pilot holes will be put through a single bag. Conveyance of the mine water in temporary piping from each of the pilot hole valves to the sediment bags will be determined by the Contractor. The estimated quantity for the sediment bags is 20, designed to contain approximately 125 tons of sludge, as detailed in the specifications.

Q12. Is there an engineer’s estimate?

A12. The engineer’s estimate is $650,153.

Q13. What is the sediment control for the drilling water during the bore operations?

A13. Drilling water & sediment encountered during the bore operations will be temporarily contained within the bore pit and can be directed to the low point of the sediment bladder containment area. If sediment laden water cannot be collected and piped to a sediment bag, it may be passed through at least one woven belted silt fence prior to discharge to Drews Creek.

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REVISED SPECIFICATIONS

1. Specification 12.2.12, is revised to include the grade of the 20” casing (ASTM A252, Schedule 30, Grade 3) in the requirements for the casing, and is as follows:

12.2.12. 20” Diameter Casing shall be 20” diameter steel pipe with a wall thickness of 0.5” and meeting the requirements of ASTM A252, Schedule 30, Grade 3.

REVISED DRAWINGS

1. On the Title Sheet, the quantity for Bid Item “4.2 GRAVEL DRIVE

REHABILITATION,” is revised such that an additional quantity of 375 tons is added to the quantity of 125 tons, bringing the total to 500 tons.

2. The reclamation plan (Sheet R1) is revised to specify the two proposed pipes from the mine void to Drews Creek to serve as permanent wet seal will be 12” diameter C900 PVC.

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CLARIFICATIONS, NOTES, AND CHANGES

1. Additional insurance information specific to this project site is given per the Construction

Right of Entry Agreement and is as follows:

a. The Contractor is required to carry and maintain (a) Public Liability Insurance and Comprehensive Vehicle Liability insurance with coverage in an amount not less than $5,000,000.00 bodily injury and property damage for each occurrence and not less than $5,000,000.00 aggregate and (b) workers compensation insurance, as required by law, and (c) employers liability insurance in an amount of not less than $1,000,000.00 for each occurrence, which in the case of each such insurance policy shall cover all of its contractor(s)’ acts or omissions on or with respect to the property. Property Owner shall be named as an additional insured under the contractors’ liability insurance policies, and such contractors shall provide to Owner certificates of such insurance each year and upon reasonable request of Owner at other times.

2. Tree clearing shall be performed between November 15th, 2025, and March 31st, 2026.

REVISED BID SCHEDULE (Submitted separately)

1. For bid item “4.2 GRAVEL DRIVE REHABILITATION,” an additional quantity of 375 tons is added to the initial quantity of 125 tons, bringing the total to 500 tons.

2. The increase in quantities and bid estimates directly increase the bid items that are a maximum percentage of the total bid price. The estimate is revised accordingly.

PRE-BID SIGN IN SHEETS

Pre-bid sign in sheets are attached.

12.2.8. Grout to be used in the casing anulus shall consist of a mixture of one-part Type

II sulfate resistant Portland cement and three parts sand, using water to produce a workable consistency. The amount of water shall be as approved or as designated by the W VDEP. Admixtures and/or pozzolan may be used with the approval of the W VDEP. The grout shall exhibit a compressive strength of 1000 pounds per square inch at 28 days with specimens made and tested according to the provisions of ASTM C 31 and C 39. Four (4) specimens are required for each grout test. Grout mix designs to be used by the Contractor shall be submitted to the W VDEP for review and approval. The proposed design mix and sufficient test data using proposed sources of the mix components to verify strength parameters shall be supplied to the Owner for approval prior to use in the Project. All testing shall be the responsibility of the Contractor.

12.2.9. Suitable grout pump, pipes, or tubes for grouting the annular space between the drill hole and the mine drain pipe.

12.2.10. Augering fluids shall use a mixture of bentonite clay, or other approved stabilizing agent, mixed with potable water with a minimum pH of 6.0 to create the drilling fluid for lubrication and stabilization, as necessary. Vary the fluid viscosity to best fit the soil conditions encountered. Do not use other chemicals or polymer surfactant in the drilling fluid without written consent of the

Engineer. Certify in writing to the Engineer that any chemicals to be added are environmentally safe and not harmful or corrosive to the facility. Identify the source of water for mixing the drilling fluid.

12.2.11. Drill through Valve: The drill through valve assembly shall be constructed according to the detail as provided in the plans. The assembly consists of weld

12.2.13. 12” Diameter C900 PVC Pipe shall be JM Eagle, Eagle Loc900 PVC Pipe or approved equivalent. The pipe for the bore shall consist of perforated 12-inch diameter PVC C900 pipe with internal restraining joint. The conveyance pipe shall consist of non-perforated 12-inch diameter PVC C900 pipe with internal restraining joint.

on steel pipe flanges, 8” by 12” steel flanged concentric reducers and a 12” 150-pound steel gate valve made and tested according to the provisions of ASTM

A126-04f. The valve assembly shall be attached to the 8” pilot casing and utilized to regulate the dewatering of the mine pool.

12.2.12. 20” Diameter Casing shall be 20” diameter steel pipe with a wall thickness of

0.5” and meeting the requirements of ASTM A252, Schedule 30, Grade 3

PROJECT

SITE

EM

west virginia department of environmental protection

P

AN L II S ER

T B

N E O R M I

HAROLD D. WARD, CABINET SECRETARY

DREWS CREEK A HIGHWALL WV-3391

PROJECT

SITE

2140 2160

70 21

90 21

21802160

2280 2270

2390 238

30 23

10 23

30 22

40 22

227022

20 2260 224

21902130

E

E

E

E

N 292000

100+60100+00

0'

40'

E

E

N 292000

N 291500 N 291500

202+98

200+00

201+00

202+00

C'

C

D

D'

E

E'

F'F

G'

H' H

G

103+56

100+00

101+00

102+00

103+00

0+

1+

302+00

303+00

304+00

305+00 305+14

0+

1+

402+00 402+52

500+00 501+00 501+56

600+00

601+00 601+33

700+00 701+00 701+79

900+00

901+00

2+

3+

3+

C'

802+35

800+00

801+00

802+00

0+85

0+00

E'

I

I'

J'

J

PROPERTY LINE AND ROAD NUMBER INFORMATION REPRESENTS AN APPROXIMATE

BEST FIT ESTIMATE OF PROPERTY LINE BOUNDARIES AS OBTAINED FROM

COUNTY TAX MAPS ACQUIRED THROUGH THE WEST VIRGINIA STATE TAX

DEPARTMENT IN CHARLESTON, WV. PROPERTY LINES SET OUT AND DESIGNATED

WITHIN THESE CONSTRUCTION PLANS DO NOT REPRESENT A TRUE AND ACCURATE

BOUNDARY SURVEY.

MUWV

MISS UTILITY OF WEST VIRGINIA, INC.

1 800 245 4848

DIP

STRIKE

EAGLE

COAL SEAMDISCLAIMER:

STRIKE AND DIP FROM EASTERN ASSOCIATED,

KOPPERSTON NO. 1 MINE, FINAL MAP,

EXTENDED DATE: JUNE 13, 1998

EXISTING

60"Ø CMP

INV=2105.24

GAS VALVE

W

ES

T

VI

R G

IN

IA

S

TA

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P

LA

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O O

R D

IN

AT

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SY

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, W .V

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TH

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PREVIOUS BORROW AREA

PROPOSED TEMPORARY

ACCESS ROAD NO. 2

(STA. 303+50 - STA. 305+14.49 OPTIONAL)

EXISTING

ACCESS ROAD

FROM CO. RT 10/1

GAS

WELL

APPROXIMATE LOCATION OF

ABANDONED EAGLE SEAM DEEP MINE

STABILIZED CONSTRUCTION ENTRANCE

PROPOSED LIMIT OF DISTURBANCE (1.57 AC.)

LEGEND

EXISTING CULVERT

DESCRIPTIONSYMBOL

EXISTING UNPAVED ROAD

EXISTING MINE PORTAL

EXISTING TREELINE/BRUSHLINE

PROPOSED SILT FENCE

PROPERTY LINE

STORMWATER OUTLET

EXISTING INDEX CONTOURS

EXISTING INTERMEDIATE CONTOURS

PROPOSED FLOW DIRECTION

EXISTING FLOW DIRECTION

EXISTING GAS LINE

PROPOSED ACCESS ROAD

EAGLE SEAM DEEP MINE WORKINGS

EAGLE SEAM STRUCTURE CONTOURS2130

EXISTING DITCH

TAX MAP AND PARCEL NUMBER

PROPOSED SEDIMENT

CONTAINMENT BLADDER

LOCATION

PROPOSED TEMPORARY

ROAD CROSSING

Q2 = 112.36 CFS

D50 = 9"

TD = 2'

TW = 40'

NO. 2 GAS SEAM DEEP MINE WORKINGS

APPROXIMATE LOCATION OF

ABANDONED NO.2 GAS SEAM

DEEP MINE (KOPPERSTON NO. 2)

APPROXIMATE LOCATION OF

ABANDONED EAGLE SEAM DEEP MINE

APPROXIMATE LOCATION OF

ABANDONED NO. 2 GAS SEAM

DEEP MINE (KOPPERSTON NO. 2)

PORTALS PREVIOUSLY

RECLAIMED BY OTHERS

TWO (2) TEMPORARY PROPOSED PIPES

TO SEDIMENT CONTAINMENT BLADDER

(SIZE AND TYPE TO BE DETERMINED BY CONTRACTOR)

PROPOSED WET

SEAL (OPTIONAL)

D1

D2

B

B'

A A'

PROPOSED PIPES TO SEDIMENT CONTAINMENT BLADDER

PUBLIC SIGN

LOCATION

D1

D2

D1

D2

PROPOSED

SILT FENCE

(TYP.)

PROPOSED

STABILIZED

CONSTRUCTION

ENTRANCE

NOTES:

1. CONTRACTOR SHALL BE RESPONSIBLE FOR ANY AND ALL PERMIT REQUIREMENTS.

2. CONTRACTOR SHALL BE RESPONSIBLE FOR THE LOCATION AND VERIFICATION OF ANY AND

ALL UTILITIES LOCATED WITHIN THE CONSTRUCTION LIMITS.

3. CONTRACTOR SHALL BE RESPONSIBLE THAT ALL AREAS AFFECTED BY ACCESS AND/OR

CONSTRUCTION SHALL BE REGRADED, SEEDED AND MULCHED UPON COMPLETION OF PROJECT.

4. CONTRACTOR SHALL BE RESPONSIBLE THAT ANY AND ALL PROPERTY CORNERS, (i.e. IRON

RODS, REBARS, CONCRETE MONUMENTS AND SIGNS) DISTURBED SHALL BE RE-ESTABLISHED

AND RESET UPON COMPLETION OF THE PROJECT.

5. SEDIMENT REMOVED FROM DEEP MINE SHALL BE TAKEN OFFSITE TO AN APPROVED LANDFILL.

6. POTENTIAL SOIL BORROW AREAS ARE NOT TO BE CLEARED AND ALL EROSION AND SEDIMENT

CONTROL MEASURES PROVIDED FOR THESE AREAS ARE NOT TO BE INSTALLED UNLESS THEY

ARE UTILIZED DURING CONSTRUCTION ACTIVITIES.

7. THIS PROJECT IS ENCOMPASSED BY A SINGLE PROPERTY OWNER AND ALL PROPERTY LINES

ARE LOCATED OUTSIDE OF THE SHEET BOUNDARY.

8. BASE MAPPING IS A COMBINATION OF FLOWN MAPPING PROVIDED BY THE WVDEP IN 2013 AND

LIDAR FROM THE US GEOLOGICAL SURVEY.

9. THE HORIZONTAL BORE PATH IS APPROXIMATE AND WILL BE FURTHER REFINED BY THE

DRILLING CONTRACTOR.

10. HORIZONTAL DRILLING TO THE EAGLE SEAM FROM THE PROPOSED DRILL PAD IS

APPROXIMATELY 286 FEET HORIZONTALLY AND 14.10 FEET VERTICALLY ABOVE TO THE P-1

PIEZOMETER DRILL HOLE LOCATION (SEE PROFILE B-B').

11. HORIZONTAL DRILLING TO THE EAGLE SEAM FROM THE PROPOSED DRILL PAD IS

APPROXIMATELY 223 FEET HORIZONTALLY AND 14.87 FEET VERTICALLY ABOVE TO THE P-2A

PIEZOMETER DRILL HOLE LOCATION (SEE PROFILE I-I').

12. THE NOAA RAINFALL STATION KOPW2 (KOPPERSTON) LOCATED IN WYOMING COUNTY, WV,

SHALL BE UTILIZED TO MONITOR RAINFALL ACCUMULATION ON THE PROJECT SITE. THIS

STATION WILL SERVE AS THE REFERENCE FOR DETERMINING RAINFALL EVENTS THAT EXCEED

0.25 INCHES IN 24 HOURS, WHICH WILL TRIGGER THE REQUIRED INSPECTIONS OF E&S

CONTROLS AS PER PROJECT SPECIFICATIONS AND REGULATORY/PERMIT REQUIREMENTS.

EXISTING GAS RISER/

METER HOUSE

TM-24

P-25

D1

D2

CP# NORTHING EASTING ELEVATION DESCRIPTION

SURVEY CONTROL

1 291652.91 1824284.86 2120.34 REBAR WITH CAP

2 291864.09 1824529.06 2124.65 REBAR WITH CAP

ABANDON

PIEZOMETER

N: 291188.2516 E: 1824384.8843

BOTTOM OF

VOID EL. 2134.10

GAS

RISER

GAS WELL

PIEZOMETER LOCATION

SURVEY CONTROL POINT

P-1

CONSTRUCTION LIMITS

EXISTING DRAINAGE

PROPOSED CULVERT

PROPOSED SEDIMENT CONTAINMENT

BLADDER

EXISTING

2-12" Ø PIPES

EXISTING WATER DISCHARGE POINT

GROUT FILLED FABRIC CHANNEL

D2 P-1

PORTALS PREVIOUSLY

RECLAIMED BY OTHERS

STRUCTURE CONTOURS (EAGLE SEAM)

DRYER TANK

VALVE

WETLAND

MAP "INSET"

SCALE : 1" = 50'

DREWS CREEK RD. C

O. R

T. 1 0/1

PARKING

LOT

BUILDING

(CHURCH)

SPILL CONTAINMENT BERM

PROPOSED TEMPORARY

STREAM CROSSING

1-18" Ø CMP

PROPOSED TEMPORARY

STREAM CROSSING

3-18" Ø CMP

D2

DRILL PAD - APPROX. EL. 2120

TEMPORARY SIDE HILL FILL

BERM

EXISTING ACCESS ROAD NO. 1

THE PROPOSED STABILIZED CONSTRUCTION ENTRANCE IS LOCATED

APPROXIMATELY 6,810 FEET NORTHEAST FROM THE PROPOSED

CONSTRUCTION LIMITS AT THE EDGE OF PAVEMENT

(DREWS CREEK ROAD CO. RT. 10/1), SEE MAP "INSET".

CONTROL POINT CP 1

TO BE RELOCATED

PROPOSED INDEX CONTOURS

PROPOSED INTERMEDIATE CONTOURS

E ng in ee rin g ·

S ur ve yi ng L an d

P la nn in g T es tin g

In sp ec tio n (3

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C O

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PL

AN

"STAGING

AREA"

P-2A

HO

RIZO

NTAL DRILLING

TO

EAG

LE SEAM

(SEE NO

TE 11)

K'

K'

PROPOSED GROUT FILLED FABRIC CHANNEL

TW = 6' (OPTIONAL)

EXISTING

WETLAND

EXISTING

WETLAND

TM-24

P-25

TM-24

P-25

TM-24

P-25

TM-24

P-25

TM-24

P-25

EXISTING

2-12" Ø PIPES

ABANDON

PIEZOMETER

N: 291262.4240 E: 1824400.4890

BOTTOM OF VOID

EL: 2134.87

"STAGING

AREA"

PROPOSED VEGETATED CHANNEL

PROPOSED DIVERSION CHANNEL NO. 1

STA. 900+00 - 902+97 (SEE SHEET D3)

TW = 6'

D3

PROPOSED RIP-RAP CHANNEL

PROPOSED DIVERSION CHANNEL NO. 1

STA. 902+97 - 903+47.60 (SEE SHEET D3)

TW = 6'

D3

P-2

P-2 N: 291277.6 E: 1824403.0

H O

R

IZO

N

TAL D

R

ILLIN

G

TO

EAG

LE SEAM

(SEE N

O

TE 10)

PROPOSED ROCK CHECK DAM3

D3

PROPOSED DIVERSION CHANNEL NO. 2

STA. 0+00 - 0+65.21 (SEE SHEET D3)

TW = 6'

D3

PROPOSED ROCK CHECK DAM3

D3

PROPOSED TEMPORARY

ROAD CROSSING

Q = 1.64 CFS

D50 = 9"

TD = 1'

TW = 20'

D2

TWO (2) PERMANENT PROPOSED PIPES TO DREWS

CREEK TO SERVE AS PERMANENT WET SEAL

(12" Ø C900 PVC CONVEYANCE PIPE)

TWO (2) PROPOSED HORIZONTAL

BORINGS (SEE SHEET D4)

D4CONCRETE WASHOUT

EXISTING WETLAND

TO NAOMA

~4 M I

TO

P

RO

JE

CT

S

IT

E

~1 .3

M I

END PAVEMENT

LAT: 37° 48' 55"

LONG: 81° 29' 44"

DEP26*09 SIGN IN SHEEТ

REQUEST FOR QUOTATION NO.

PLEASE PRINT

Page of 2

Date: August 21, 2025 Drews Creek A Highwall

* PLEASE BE SURE TO PRINT LEGIBLY - IF POSSIBLE, LEAVE A BUSINESS CARD

FIRM & REPRESENTATIVE NAME MAILING ADDRESS

TELEPHONE

NUMBER

Thxtu Const Go Ire Bux 13279 Chorlest PHONE 304 984.2299Company:

Rep: Da/e Thoxto

Email Address: IhaKTw Const-steAT 6madaco

Company: HolySmoke Coa l

Rep: Bbhy Sacaetle Email Address: Bob buracte 786 Bmil.com

Company: AYTIRR ARRON

Rep:

Email Address: easternarrowehotmailicom

Company: Corpentor Raclamation Rep: Raly Carprotor Email Address: Rcarpen1e3 @ oul com

Company: A dnd A Energt in

Rep: Maghew Addtir Email Address: Mthew. 4dddil Ohatmoil.com

WV 25360 304 E 415 7155

P.O Box 644 Holdey PHONE 304-784-4294

WV 25625

PHONE

PC BX 13UIS PHONE 364-9821-111S

Sissonville, ws

Pohox 813 richiynds VA 2441 PHONE 276-202-6801

DEP26*09 SIGN IN SHEET

REQUEST FOR QUOTATION NO.

PLEASE PRINT

Drews Creek A Highwall

* PLEASE BE SURE TO PRINT LEGIBLY - IF POSSIBLE, LEAVE A BUSINESS CARD

FIRM & REPRESENTATIVE NAME

Company: Bat#le Creek Ine

Rep: Bernie Haer

Email Address: bharper@ potoMACNwuth.com

Company: SQр Rep: Scott A. Cunningham

Email Address: SCunningham@S9p9C.com

Company: Rock Soid

Rep: Jiffey Barnhouse

Email Address: Jeffre ybamhouse yahco.com

Company: WUDEP-AML Rep: Chris Daniels Email Address:

Date: August 21, 2025

TELEPHONE

NUMBERMAILING ADDRESs

91 boull park Red PHONE 304-792-9781

Crninsrille wd 24205

PHONE 304-532-3659281 Smiley Drive

St. Albans, WV 25177 etametso christogher, micdanieks@ wv.gor Company: TERRADON

Rep: ANDREW WAGNER

Email Address: andrew. wagner@ terradan.can

PHONE 304-640-2577

PHONE 3049323062

PHONE

304-573-3921

DREWS CREEK FINAL COST ESTIMATE.xlsx 8/25/2025

ITEM NO. DESCRIPTION UNIT UNIT COST QUANTITY COST

1.1 MOBILIZATION AND DEMOBILIZATION (LIMITED TO 5% OF TOTAL BID) LS 32,000.00$ 1 32,000.00$

2.1 CONSTRUCTION LAYOUT (LIMITED TO 3% OF TOTAL BID) LS 19,000.00$ 1 19,000.00$

3.1 QUALITY CONTROL (LIMITED TO 3% OF TOTAL BID) LS 19,000.00$ 1 19,000.00$

4.1 SITE PREPARATION (LIMITED TO 5% OF TOTAL BID) LS 32,000.00$ 1 32,000.00$

4.2 GRAVEL DRIVE REHABILITATION (6"D X 2640 LF X 8' WIDTH) TONS 80.00$ 500 40,000.00$

4.3 TEMPORARY ACCESS ROAD (6"D X 515 LF X 10' WIDTH) TONS 80.00$ 180 14,400.00$

4.4 STABILIZATION FABRIC (871 LF X 10' WIDTH) SY 2.00$ 968 1,936.00$

4.5 TEMPORARY STREAM CROSSING EA 8,700.00$ 2 17,400.00$

5.1 WOVEN BELTED SILT FENCE LF 5.00$ 884 4,420.00$

5.2 STABILIZED CONSTRUCTION ENTRANCE (6" D X 75 LF X 10' WIDE) TONS 80.00$ 25 2,000.00$

5.3 ROCK CHECK DAM EA 84.00$ 2 168.00$

6.1 REVEGETATION AC 10,000.00$ 1.57 15,700.00$

7.1 6' WIDE GROUT FILLED FABRIC LINE CHANNEL (OPTIONAL) LF 90.00$ 18 1,620.00$

7.2 6' WIDE VEGETATED CHANNEL LF 13.00$ 297 3,861.00$

7.3 6' WIDE RIPRAP LINED CHANNEL LF 28.00$ 116 3,248.00$

7.4 ROAD CROSSING EA 11,000.00$ 2 22,000.00$

7.5 PIEZOMETER ABANDONMENT EA 2,000.00$ 2 4,000.00$

9.1 WET MINE SEAL (OPTIONAL) EA 16,260.00$ 1 16,260.00$

9.2 MINE SEAL CONVEYANCE PIPE (OPTIONAL) LF 100.00$ 56 5,600.00$

9.3 MINE SEAL STONE (OPTIONAL) TONS 110.00$ 250 27,500.00$

12.1 DRILL THROUGH VALVE EA 10,000.00$ 2 20,000.00$

12.2 8" DIAMETER PILOT HOLES LF 30.00$ 509 15,270.00$

12.3 20" DIAMETER STEEL CASINGS LF 300.00$ 509 152,700.00$

12.4 12" DIAMETER C900 PVC CONVEYANCE PIPES LF 130.00$ 609 79,170.00$

12.5 SODA ASH BRIQUETTES (50 LB. BAG) EA 60.00$ 15 900.00$

12.6 MINE DRAINAGE SEDIMENTATION CONTAINMENT BLADDER SYSTEM (22.5 CIR. X 22' L) EA 5,000.00$ 20 100,000.00$

TOTAL 650,153.00$

DREWS CREEK DANGEROUS IMPOUNDMENT - CONSTRUCTION COST ESTIMATE