Clouse_Hill_Specifications.pdf

TENNESSEE DEPARTMENT OF

ENVIRONMENT AND CONSERVATION

DIVISION OF MINERAL AND

GEOLOGIC RESOURCES

LAND RECLAMATION SECTION

SPECIFICATIONS

FOR THE

CLOUSE HILL

RECLAMATION PROJECT

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SPECIFICATION INDEX FOR THE

CLOUSE HILL RECLAMATION PROJECT

Section No. Title Page

100.0 Introduction ……………………………...………. 1

101.0 Delivery Time …………………………………… 1

102.0 Summary of Work ……………………………… 1

103.0 License Requirements …………………………. 1

104.0 Applicant Violator System ………….…………... 2

105.0 Operator Qualifications ……………………...…... 2

106.0 Increase or Decrease in Quantities …………

107.0 Preparation of Erosion Control Measures ……. 2

108.0 Care of Public and Private Property …………… 2

109.0 Site Access ………………………………………. 3

111.0 Working Hours …………………………………… 3

112.0 Site Clean Up ……………………………………... 3

114.0 Maintenance during Construction ……………… 3

115.0 Unacceptable Material and Workmanship ……. 3

116.0 Final Inspection and Acceptance ……………… 3

117.0 Accidents …………………………………………. 4

118.0 Completion Time ………………………………… 5

119.0 Safety ……………………………………………... 5

120.0 Dust Control ……………………………………… 5

121.0 Superintendence by Contractor ………………... 5

123.0 Tennessee One-Call Center …………………… 6

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Clouse Hill Reclamation Project

Section No. Title Page

200.0 Mobilization ……………………………………... 7

201.0 Clearing and Grubbing ………………………… 8

204.0 Area Grading …………………………………… 11

208.0 Ditches, Terraces, and Channels ……………... 15

209.0 Riprap …………………………………………. 16

211.0 Silt Retention Barrier ………………………. ….. 19

214.0 Pond Treatment and Dewatering ……………... 21

302.0 Limestone Subsurface Drain Construction …… 23

701.0 Road Restoration ………………………………. 26

801.0 Vegetation Establishment ……………………... 28

SPECIFICATIONS FOR THE CLOUSE HILL RECLAMATION PROJECT

Section 100.0 - Introduction

The following specifications are for reclamation services on the abandoned mine areas at the location shown on the contract drawings.

Definitions:

State: The State, as used in these specifications, shall mean the Tennessee Department of Environment and

Conservation, Division of Mineral and Geologic Resources, Land Reclamation Section, and its representatives.

Project Officer: The Project Officer, as used in these specifications, shall mean the employee of the Land

Reclamation Section of the Tennessee Division of Mineral and Geologic Resources who is currently assigned to this project.

Division Engineer: The Engineer, as used in these specifications, shall mean the Environmental Protection

Specialist of the Land Reclamation Section.

Contractor: The Contractor, as referred to in these specifications, shall mean the general earthmoving contractor selected to perform the proposed reclamation that has a proven performance history.

Section 101.0 - Delivery Time

All work specified in this contract is to be completed within approximately 330 days after receipt of order.

This agency term contract will remain active for a period of 24 months from the issue date to allow for determination of final quantities, delivery of weight tickets and certifications, final inspections and acceptance of work and processing of the invoice.

Work is to commence within approximately 30 days after receipt of order.

Once work begins, the Contractor shall use the necessary labor, equipment, and materials to actively pursue the work.

Section 102.0 - Summary of Work

This project is located in Grundy County, Tennessee. The project involves the reclamation of 84.5 acres of abandoned strip mines across three different sites. These areas are characterized by dangerous highwalls, water-filled pits, and barren spoils. The scope of work includes clearing and grubbing, area grading, pit dewatering and treatment, the construction of rock-lined channels and anoxic limestone drains, road restoration, and site revegetation.

Section 103.0 – License Requirements

The Respondent and all applicable subcontractors must hold an active Tennessee Contractors License with a

Heavy Construction (HC), Heavy Construction “E” (HC-E), a full Building Construction (BC), a Building Construction

“Commercial” (BC-B), a Building Construction “Industrial” (BC-C), or a Highway, Railroad and Airport Construction

“Grading & Drainage” (HRA-A) classification.

Section 104.0 - Applicant Violator System

This project is funded through a grant with the U.S. Department of Interior’s Office of Surface Mining. Therefore, the Contractor must not have outstanding violations with the Office of Surface Mining or be listed for any reason on the

OSM Applicant Violator System (AVS).

A construction contract cannot be issued for this project to any contractor who has unfavorable status on the AVS.

The successful bidder is required to submit company ownership and control information to the Land Reclamation office for certification. The Land Reclamation Section will provide the necessary forms for submittal.

Section 105.0 - Operator Qualifications

All equipment operators shall be competent and experienced with the type of equipment for which they are assigned, and they shall also be experienced in working to the lines and grade established on cut and fill stakes in the field.

Section 106.0 - Increase or Decrease in Quantities

All quantities set forth in these specifications and on the bid sheet are estimates. The State reserves the right to increase or decrease the actual quantities as site conditions warrant. The unit price bid shall remain unchanged. Any increase in contract quantities will be made in writing prior to performing any work.

Partial payments will be made based on the amount of work accomplished at the time of the payment request.

Payment requests should be: 1) accompanied by supporting measurement and calculation documents and 2) mutually developed by the contractor and project officer. Any payment requests without the concurrence of these requirements will not be processed.

Final payment shall be calculated using the total number of units utilized and measured in the project at the unit price bid for each item.

Section 107.0 - Preparation of Erosion Control Measures

Best Management Practices found in Chapter 7 of the Tennessee Erosion and Sediment Control Handbook

(August 2012, Fourth Edition) shall be utilized, except as modified herein. Special care shall be taken during all phases of construction to prevent pollution of streams with harmful or polluting materials such as but not limited to fuels, oils, bitumen, and calcium chloride. Payment will be a subsidiary of Section 204.0, Area Grading. Mulch berms, silt fence, and straws utilized for erosion control shall be paid under Section211.0, Silt Retention Barrier.

Section 108.0 - Care of Public and Private Property

The contractor shall take all necessary precautions to prevent damage to all overhead, underground, and above ground structures and to protect and preserve property within or adjacent to the project and shall be responsible for all damage thereto. The contractor shall exercise special care in the execution of the work to avoid interference or damage to all operating facilities or structures. The contractor shall be responsible for any damage or injury to public or private property and shall otherwise restore or replace such damage or injury to property as may be deemed necessary by the engineer.

The contractor shall cooperate with utilities during any relocation work, adjustment, removal, or reconstruction of any such utility or facility within the work areas.

Section 109.0 - Site Access

The Contractor shall be responsible for maintaining the access roads in a passable condition during the life of the contract. All roads not designated as permanent shall be closed and water barred upon the completion of the project to prevent public access to the affected area. No other access points will be used unless approved by the Engineer.

Passable condition means roadways shall be graded as often as necessary to remove ruts that will trap water or erode. Access roads will be ditched, water barred, graded, have culverts installed, or have whatever other measures are necessary to protect the road from erosion and to maintain a relatively smooth surface.

Section 111.0 - Working Hours

All work on this project, except for dewatering, will be restricted to daylight hours unless specifically approved in writing by the Program Manager of the Land Reclamation Section. The contractor may be required at the project officer's discretion to perform the necessary dewatering on a 24-hour basis.

Section 112.0 - Site Clean Up

All work areas and/or areas disturbed during the course of the work shall be thoroughly cleaned of all rubbish, debris, construction waste, or other unsightly materials. Sanitary facilities shall be removed and/or backfilled in a manner acceptable to the project officer.

Section 114.0 - Maintenance during Construction

The contractor shall maintain completed work during construction and until the project is accepted. This maintenance shall constitute continuous and effective work carried out day by day, with adequate equipment and forces to the end, that ensures the area is kept in a satisfactory condition at all times. No separate payment will be made for this item.

All costs of maintenance work during construction and before the project is accepted shall be a subsidiary to the lump sum bid price for mobilization.

Section 115.0 - Unacceptable Material and Workmanship

All material not conforming to the requirements of the specifications will be considered as unacceptable. All unacceptable materials and workmanship, whether in place or not, will be rejected and shall be removed immediately from the site of the work unless otherwise directed by the engineer. In case of failure by the contractor to comply promptly with any order by the engineer to remove rejected material and workmanship, the engineer shall have authority to have such rejected work and materials removed by other means and to deduct the expense of such removal from any monies due, or to become due, to the contractor. Corrective actions to repair unacceptable work and materials will be completed at no cost to the State.

Section 116.0 - Final Inspection and Acceptance

(a) All work (which term includes but is not limited to materials, workmanship, and manufacture and fabrication of components) shall be subject to inspection and tests by the State at all reasonable times and at all places prior to acceptance. Any such inspections and tests are for the sole benefit of the State and shall not relieve the contractor of responsibility for providing quality control measures to ensure that the work strictly complies with the contract requirements. No inspection or tests by the State shall be construed as constituting or implying acceptance. Inspection or test shall not relieve the contractor of responsibility for damage to or loss of the material prior to acceptance, nor in any way affect the continuing rights of the State after acceptance of the completed work under the terms of paragraph (f) of this clause, except as hereinabove provided.

(b) The contractor shall, without charge, replace any material or correct any workmanship found by the State not to conform to the contract requirements. The contractor shall promptly segregate and remove rejected material from the premises.

(c) If the contractor does not promptly replace rejected material or correct rejected workmanship, the State (1) may, by contract or otherwise, replace such material or correct such workmanship and charge the cost thereof to the contractor, or (2) may terminate the contractor's right to proceed in accordance with the clause of this contract entitled

"Cancellation".

(d) The contractor shall furnish promptly, without additional charge, all facilities, labor, and materials reasonably needed for performing such inspection and tests as may be required by the engineer. All inspections and tests by the

State shall be performed in such manner as not to unnecessarily delay the work. Special, full size, and performance tests shall be performed as described in this contract.

(e) If the State decides to inspect completed work before final acceptance, which may involve removing or tearing it out, the contractor must promptly provide all necessary facilities, labor, and materials upon request. If such work is found to be defective or nonconforming in any material respect, due to the fault of the contractor or his subcontractors, he shall defray all the expenses of such examination and of satisfactory reconstruction.

(f) Unless otherwise provided in this contract, acceptance by the State shall be made as promptly as practicable after completion and inspection of all work required by this contract, or that portion of the work that the engineer determines can be accepted separately. Acceptance shall be final and conclusive except as regards latent defects, fraud, or such gross mistakes as may amount to fraud, or as regards the State's rights under any warranty or guarantee.

(g) Upon due notice from the contractor of presumptive completion of the entire project work, the engineer will make an inspection. If all construction provided for and contemplated by the contract is found completed to his satisfaction, a final inspection will be scheduled within five (5) days. The final inspection shall be conducted by the

Program Manager of the Land Reclamation Section or his designee, the Division Engineer, and the Project Officer. The contractor shall be present along with his superintendent and all subcontractors, if any, that have worked on the project.

The contractor shall not remove any equipment from the site until after he receives written notice of final acceptance of the work. Written notice of the final inspection and acceptance will be issued to the Contractor stating final acceptance and the date of release.

If, however, the inspection discloses any work in whole or in part, as being unsatisfactory, the engineer will give the contractor the necessary instructions for the correction of the deficiencies and the contractor shall immediately comply with and execute such instructions. Upon completion of the corrective work, another inspection shall be made which shall constitute the final inspection provided all work has been satisfactorily completed.

Section 117.0 - Accidents

The contractor shall provide, at the site and at his own expense, such equipment and medical facilities as are necessary to supply first-aid service to anyone who may be injured in connection with the work.

The contractor must promptly report in writing to the project officer all accidents whatsoever arising out of, or in connection with, the performance of the work, whether on, or adjacent to the site which caused death, personal injury, or property damages, giving full details and statements of witnesses. In addition, if death, serious injuries, or serious damages are caused, the accident shall be reported immediately by telephone or messenger to both the project officer and the contracting officer.

If any claim is made against the contractor or any subcontractor on account of any accident, the contractor shall promptly report the facts in writing to the project officer, giving full details of the claim.

Section 118.0 - Completion Time

The completion time is 330 calendar days, with no allowances for weekends, holidays, or normal weather disruptions. The Contractor shall take this time frame for completion into consideration when bidding on this project.

Time extensions will not be granted except for unforeseeable, uncontrollable events (e.g., acts of God). Poor planning, inefficiency, equipment failure, or other factors within the Contractor's control will not justify a time extension.

Performance milestones will be enforced on the project. If 25% of the acreage is not completed by Day 82 of the contract, the Contractor will be given a warning. If 50% of the acreage is not completed by Day 165 or 75% of the acreage is not completed by Day 247 of the contract, the contract will be terminated in accordance with Section 7 of the contract terms and conditions.

Section 119.0 - Safety

The contractor shall conduct his operations in such a manner that all applicable laws and regulations are adhered to during performance of this contract.

119.01 - The contractor shall provide, erect, and maintain all necessary barricades, suitable and sufficient lights, danger signals, signs, and other traffic control devices, and shall take all necessary precautions for the protection of the work and safety of the public.

119.02 - No direct payment will be made for work required in this section, but the cost thereof will be considered to be included in bid price under Section 200.0, Mobilization.

Section 120.0 - Dust Control

The contractor shall take all available precautions to control dust. Dust shall be controlled by sprinkling, by applying calcium chloride, or by other methods as approved. If sprinkling is the selected method for controlling dust, the contractor shall water as often as necessary to control dust that is produced as a result of the movement of construction equipment and vehicles. Oils shall not be used. The use of other methods in preventing dust formation shall require prior approval from the Project Officer.

Section 121.0 - Superintendence by Contractor

The contractor, at all times during performance and until all the work is completed and accepted, shall give their personal superintendence to the work, or have on the project a competent superintendent, satisfactory to the division

Program Manager and with authority to act for the contractor.

Section 123.0 – Tennessee One-Call Center

In the state of Tennessee, state law requires anyone about to engage in either digging, excavation, moving of earth, demolition, or any type of activity that disturbs the earth and therefore possibly involving a danger to damaging underground utility lines, to notify the Tennessee One-Call Center of their intent to dig.

Tennessee One-Call will then notify the member utilities of your proposed work. The utility company locator will then have 72 hours, excluding holidays and weekends, to locate those underground facilities.

While not required by law, in addition to calling Tennessee One-Call, you may also want to contact any non-member utilities that you know are in the area of your proposed work.

The locate ticket you receive is only valid for 15 calendar days from the start date indicated on the ticket, after which time, it expires. If you wish to continue working, you must call in at least three working days before the expiration date to renew your locate ticket, at which time you would be given a new ticket number.

The contractor must call the Tennessee One-Call Center at 811 or 1-800-351-1111 at least three days prior to starting work. Tennessee 811 accepts locate requests 24 hours a day, seven days a week.

Section 200.0 - Mobilization

Description

200.01 – The project consists of three separate Sites. Access to the Sites will require mobilization of equipment to the three different locations.

A paved county road must be crossed at Site 2 to traverse between areas. Precautions will be taken not to damage the road. Any damage to the road will be repaired at the Contractor’s expense.

The work in this Section consists of furnishing all plant, equipment, labor, materials, and supervision necessary for performing all work required under this contract. This includes all operations performed in connection with mobilization of the Contractor’s equipment and personnel.

Mobilization shall include the purchase of contract bonds; transportation of personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary facilities at the site; and other preparatory work at the site. The specification covers mobilization for work required by the contract at the time of award.

Demobilization is also included under this Section. All equipment will be removed from the site before final payment is made under this Section.

A land surveyor licensed in the State of Tennessee shall be required for this project. Any property corners located within the final work limits will be replaced after construction has been completed. Several points along property lines that run through the project work limits will also be marked for the convenience of the landowner. The surveyor will be responsible for any research (locating deeds, locating surveys, etc.) necessary to accurately locate the property corners and lines. There are 16 known property corners shown on State Property Viewer maps within or very close to the work limits. Additional corners may be present depending on the maps and surveys obtained by the surveyor. The cost for furnishing the licensed surveyor and all work required to place the property pins shall be included under in the lump sum price bid under this Section. The general locations of the property pins shown on the drawings are only approximations and should be taken as such.

Payment for the licensed surveyor and all work necessary to locate and replace all property corners within the project work limits shall be included in the lump sum payment for Mobilization under this Section.

Measurement and Payment

200.02 - Measurement will be one (1) job, lump sum for all work completed under Mobilization.

Payment will be made at the contract lump sum price. This price shall be full compensation for furnishing all materials, labor, equipment, and incidentals necessary to complete the work.

Section 201.0 - Clearing and Grubbing

Special Project Specifications

201.00 – Clearing and grubbing limits will be flagged by the Project Officer. The Contractor shall confine all work within the flagged area. Care shall be taken to not damage any trees outside the flagged limits. All clearing debris shall be treated according to Section 201.05 Methods 1 (Windrowing), 4 (Burying), 5 (Chipping), or 6 (Piling and Burning). The primary method of disposal will be Method 5, Chipping. Disposal of clearing debris by other methods will require approval of the Project Officer.

Most of the clearing debris will be chipped and utilized for sediment control. Clearing debris twenty-inch (20”) diameter or smaller shall be treated according to Method 5 (Chipping) of Section 201.05. Chipped debris larger than twenty-inch (20”) diameter will be piled and burned. Chipped debris will be utilized as mulch filter berms for sediment control and onsite soil stabilization measures where appropriate. The Project Officer will determine where the chipped debris is to be placed. Excess chipped debris will be placed in the bottom of the pits. Remaining stumps will be buried in the bottom of the pits. Acceptable mulch filter berms will be paid to the nearest one linear foot under Section 211.0, Silt

Retention Barrier.

If burning is required, the Contractor shall follow all applicable laws and ordinances. The Contractor shall ensure burning operations proceed under the constant care of competent watchmen at all times and in a manner that will not harm the surrounding vegetation or adjacent property.

The Project Officer will designate locations for stacking windrowed brush. Windrows will be constructed with densely packed treetops and saplings to filter sediment. Cleared debris may only be windrowed when directed by the

Project Officer.

After grade work has been completed, the State will survey the work areas to determine the acreage of the work completed. Horizontal measurement shall be used in the data collection.

201.01 - This work shall consist of clearing, grubbing, trimming, removing, and disposing of timber, construction slash, and debris. This work shall also include preservation of vegetation and objects designated to remain from injury or defacement.

Construction Requirements

201.02 – Clearing and Grubbing: All debris, trees, stumps, roots, and other protruding obstructions within the clearing limits, not designated to remain, shall be cleared, grubbed, removed, and disposed of, except for the following:

(a) Undisturbed stumps outside the embankment areas, provided they do not extend more than 12 inches above the original ground nor closer than two (2) feet to the finished sub grade or one (1) foot to any slope surface and do not interfere with the placement or compaction of embankments.

(b) Stable trees up to six (6) inches in diameter within the clearing limits but beyond the embankment and uncut vegetation less than three (3) feet in height and less than three (3) inches in diameter.

(c) Grubbing of pits, channel changes, rock sections, and channels below the depth of the proposed excavation.

All roots over three (3) inches in diameter within the embankment area shall be grubbed to a minimum depth of six (6) inches below sub grade. Roots protruding from the excavated slope shall be cut flush with the excavated slope surface.

Trees shall be felled into the area being cleared when ground conditions, tree lean, and shape of clearing permit.

Controlled felling shall be used that will ensure the direction of fall when necessary to prevent damage to property, structures, trees designated to remain, or traffic.

Snags and trees outside the clearing limits that are designated for individual removal shall be cut off not more than 12 inches above the ground and treated in accordance with Subsections 201.03 and 201.05.

Limits of work are flagged on the ground by means of paint or colored ribbon. All work shall be confined within the flagged boundary. Any clearing done outside the flagged boundary will not be paid for.

201.03 – Disposal of Merchantable Timber (Timber Meeting Utilization Standards): Timber meeting utilization standards shall be disposed of in accordance with the Special Project Specifications.

201.04 - Pioneer Roads: The construction of pioneer roads shall be approved by the engineer.

201.05 - Slash Treatment: Treatment of construction slash shall be accomplished by one or more of the following methods:

(1) Windrowing Construction Slash: Areas used for windrow construction slash shall be cleared to accommodate the windrow. Construction slash shall be placed outside the embankment in neat, compacted windrows laid approximately parallel with the toe-line of embankment slopes. The top of windrows shall not extend higher than ten (10) feet. All material in the windrow shall be matted down with construction equipment to form a compact and uniform pile. Windrows shall have 16-foot minimum length breaks at least every 200 feet. Windrows shall not be placed against trees. A pioneer road may be constructed to provide an area for placement of windows provided the excavated material is kept within the clearing limits and does not adversely affect the embankment construction.

(2) Windrowing of Large Material: Construction slash ten (10) inches or more in diameter at the small end and six (6) feet or more in length shall be windrowed as in subsection (1) above. Small materials shall be treated by one or more of the other included options for slash treatment.

(3) Windrowing and Covering: Construction slash shall be placed and compacted as in subsection (1) above and shall be covered with at least six (6) inches of rock and soil to form a smooth and uniform windrow.

(4) Burying: Construction slash shall be buried at the locations shown on the drawings and designated on the ground. Construction slash shall be matted down in layers and covered with at least two (2) feet of rock and soil. The final surface shall be smooth and sloped to drain.

(5) Chipping: Construction slash up to at least twenty (20) inches in diameter shall be processed through a chipping machine. Chips shall be deposited on embankment slopes to a loose depth not exceeding six

(6) inches. Minor amounts of chips may be permitted within the embankment if they are thoroughly mixed with soil and do not form a layer.

(6) Piling and Burning: Construction slash shall be burned in areas shown on the drawings and designated on the ground. Piles shall be constructed so that burning does not damage standing trees. If burning is incomplete, the remaining slash shall be piled and burned until the pieces are reduced to less than three (3) inches in diameter and three (3) feet in length. These pieces shall then be scattered.

The contractor shall conduct burning operations in compliance with all local, state, and federal laws, ordinances, and regulations. It is the contractor's responsibility to obtain all licenses, permits, payment of fees, etc., to comply.

(7) Decking Unmerchantable Material: Logs not meeting utilization standards that are six (6) inches or more in diameter shall be bucked into lengths not to exceed 32 feet and piled at the locations shown on the drawings.

Pieces of wood that are less than three (3) inches in diameter and three (3) feet in length may be scattered within the clearing limits.

No material shall be deposited in lakes, meadows, streams, or streambeds. Construction slash that interferes with drainage structures shall be removed immediately.

Trees adjacent to the clearing limits scorched or damaged beyond recovery shall be felled and disposed of in accordance with Subsection 201.02 or treated as construction slash.

201.06 - The method of measurement will be to the nearest 0.1 acre for all work completed and accepted. Horizontal measurement shall be used in the data collection.

Payment will be paid at the contract unit price bid per acre and shall be full compensation for furnishing and applying all materials, labor, equipment, and other incidentals necessary to complete the work.

Section 204.0 - Area Grading

204.00 - Work in this section includes backfilling and grading of spoil to eliminate highwalls and pits. After grade work is completed, drainage control will be established through the construction of rock channels, grass waterways, and terraces.

Anoxic limestone drains will be constructed to control subsurface drainage.

Site 1 is located on Clouse Hill Road. It consists of 59.8 acres. The Site consists of strip mining around Clouse Hill ridge and three other small ridges to the east of the Clouse Hill. Clouse Hill has many short sections of strip mining separated by leave areas. Clouse Hill is divided into 10 different work areas, and the three other small ridges include an additional 5 areas.

The highwalls around the Clouse Hill site range from 15 to 25 feet in height. The grade of the backfilled highwalls will have final slopes that range from a 3:1 slope to flatter than 10:1 slope in places. See sheets 4 and 5 of the drawings for details of backfilled slopes at locations along the site. The site has one water-filled pit that is very shallow. The water should be able to be absorbed during backfilling operations. If the water is unable to be absorbed, the water quality will be checked before discharging operations can begin. If the water does not meet water quality standards, treatment shall be required. Requirements for treatment and discharging water are in Section 214.0, Pond Treatment and Dewatering, of the specifications. The approximate cut/fill yardage for the Clouse Hill Ridge site is 184,000/186,000 cubic yards.

The 5 areas east of Clouse Hill have highwalls between 15 feet to 20 feet in height. There are no water-filled pits.

The final grades for the small ridge to the north will have 10:1 or flatter slopes. The backfilled highwalls for the small ridge to the south will have 4:1 or flatter slopes. See sheet 6 of the drawings for typical sections for the backfilled slopes at locations along the site.

Site 2 is situated near Short 7th Avenue in Coalmont, TN. It consists of 9.6 acres of contour mines divided into 3 areas. The site features shallow, water-filled pits and highwalls averaging 15 feet or less. The water pits may be able to be absorbed during backfilling operations depending on site conditions at the time. The backfilled highwalls will have final slopes ranging from 5:1 to 10:1. The approximate cut/fill yardage for the areas is 27,000/27,000 cubic yards. See sheet 9 of the drawings for typical sections for the backfilled slopes at locations along the site.

Site 3 is located adjacent to Bonnie Oak Road. It is a 15.1-acre area mine. The site has one water-filled pit surrounded by spoil piles. There are no highwalls present. The final backfilled slopes will have 10:1 or flatter slopes. There will be a grass lined waterway constructed through the site with a short rock-lined channel at the end to control drainage.

The final backfilled slopes are shown on sheet 11 of the drawings. The approximate cut/fill yardage for the area is

82,000/84,000 cubic yards.

Before backfilling operations can begin, all water in pits shall be tested to ensure they meet water quality standards. All water-filled pits shall be pumped or drained down prior to backfilling to not create mud or sludge. See

Section 214.0, Pond Treatment and Dewatering for details on individual pits.

Method 1 of Section 204.03, Side Casting, will be used for placing fill in pits and backfilling highwalls. The backfilling and grading of the pits and depressions where water is still pooled after pumping and draining shall be in a slow, consistent operation that allows the soil to absorb the remaining water. Backfilling must cease when the ground within the water-filled pits becomes unstable to the point the backfill will not support the weight of a dozer.

The material at the base of the highwall must be walked-in every ten (10) vertical feet in order to reduce settling of backfill material. Compaction by rolling with the earthmoving equipment used for grading operations will be acceptable.

All slopes will be tracked in perpendicular to the slope when grading is complete or when active grading operations of the slope will cease for more than 72 hours or before an anticipated rain event.

Grade work will provide positive grade for drainage on all graded areas and will eliminate all depressions that can hold water. After all rough grading is complete, surface drainage shall be provided by construction of rip-rap channels, grass-lined waterways, and terraces. The Project Officer will determine where drainage channels are required, both those specified and any additional channels, if needed. Where the grade on grassed waterways exceeds two (2) percent, rip-rap channels lined with filter fabric and rip-rap will be constructed. Typical sections for terraces, grassed waterways, and rock-lined channels are shown on sheet 12 of the drawings.

Terraces are required to intercept sheet flow runoff on backfilled slopes. The Project Officer will stake all terrace locations. Terrace grades shall not exceed 2%, verified with a transit, level, or equivalent method.

Terrace construction, grass-lined waterway construction, rock-lined channel construction, and anoxic limestone drain construction are included in the unit price bid under Section 204.0, Area Grading.

After grade work has been completed, the State will survey the sites to determine the area of the work completed.

Horizontal measurement shall be used in the data collection.

204.01 - The work in this section consists of the excavation, filling, and grading of all materials of whatever nature. It includes all hauling, formation of fills and embankments, ditch excavation, berm construction, disposal of unsuitable or surplus material, and finishing and final dressing.

Materials

204.02 – a. The materials required for this work shall be the in-situ materials on site unless stated otherwise in this contract special provisions.

b. Fencing- The barbed wire shall be 12.5-gauge wire with 4-point barbs at maximum 5-inch intervals. The top wire will be at least 42-inches from the ground, and the bottom wire will be at least 14-inches from the ground. Posts will be spaced 8-feet apart. The fencing will consist of five evenly spaced strands.

Construction

204.03 - Construction of Fills: Final grade shall approximate the lines and grade configuration shown on the plans.

Regardless of the method of fill placement, the fill shall be so constructed that positive surface drainage shall be provided at all times. Ponding of water will not be allowed on the surface of the fill. Fill material may be placed in one of several different methods. These options are listed, and any required option or options shall be shown on the drawings.

Method of placing fill:

(1) Side Casting: This method allows the dumping or pushing of material over the side of previously placed material. The material pushed or dumped must not exceed four (4) feet in thickness on the face of previously placed material. This method may be used in areas where finished grade is not critical to establishing final drainage patterns and in areas where settlement is not considered a problem. Small amounts of herbaceous and vegetative material (trees and brush) will be permitted in the base of the fill, provided it is not bunched up to form a loose pile of brush that will rot and leave a void that results in subsidence. When trees and brush are placed in the fill, the trees and brush shall be placed on the bottom of the pit and compacted to form a dense mass not to exceed four (4) feet in thickness. This method of brush disposal will only be allowed where future subsidence will not cause pits to be formed, and disposal areas will be shown on the drawings. Scattered individual trees may be allowed in the fill provided they are on the bottom of the pit area and fill material completely surrounds the trees.

Compaction is not required. This method is particularly applicable for pushing off spoil ridges into open pits to form a uniform finished grade that approximates original contour or contour shown on the drawings.

Pits that are holding water and designated to be backfilled shall be dewatered before backfilling. See Section 214.0, Pond Treatment and Dewatering.

In some instances, pits with shallow water may be backfilled with the pushing of earth material into the pit from the end and absorbing the water with the soil material. In the event absorption is allowed, the contractor shall push backfill material slowly to allow the soil particles to absorb the water and remain stable to the point of supporting the equipment used to move the backfill material.

Any mud or very soft backfill shall be covered with dry material to a depth that will support a dozer. If the mud cannot be made stable, then the contractor shall provide a guard to make sure no one enters the area until it has been stabilized.

If absorption of the water is permitted, then specifications will be included in Section

204.00, Special Project Specifications. Otherwise, absorption will not be permitted.

(2) Layer Placement of Fill: Fill material shall be placed in layers not to exceed one (1) foot in thickness and compacted by rolling with the earthmoving equipment used for transporting or hauling the fill material.

(a) Movement of materials will not be permitted when material is frozen or completely saturated.

Material must be in a condition that allows placement without bogging equipment down.

(b) Placement of fill or embankment will not be permitted in areas of bogs or swampy areas until those areas are drained and the sub grade of the fill is prepared to receive fill materials.

(c) Preparation of surfaces to receive embankment shall be prepared by clearing all vegetative and organic materials from the site where fill materials are to be placed.

(d) When rock is used as a foundation, the foundation shall be stripped and cleaned of all overlying materials. All loose, disintegrated, or light slab portions of the rock shall be removed. In rock foundations where the rock is shattered below the foundation elevation, the shattered material shall be removed, and the foundation shall be rebuilt to meet the proposed overlying construction specifications.

When the excavated material consists predominantly of rock fragments of such size that the material cannot be placed in layers of the normal 8–12-inch thickness without crushing, pulverizing, or further breaking down the pieces resulting from excavation methods, such material may be placed in the embankment in layers not exceeding four (4) feet in depth. All rock to be placed in the embankment shall be broken into sizes not exceeding three (3) feet in maximum dimension. Larger pieces may be placed on the embankment face when permitted by the engineer. Each layer shall be leveled and smoothed with suitable leveling equipment and by the distribution of finer fragments of rock or other satisfactory material.

204.03.1 - Channels, Berms, and Dikes:

(a) Diversion channels, berms, check dams, and other minor erosion control measures shall be a part of this work and shall be constructed in accordance with the details shown on the drawings.

(b) Ditch and Berm Construction: The construction of diversion channels and berms, that are necessary for the control of drainage on the sites, shall be constructed to the template cross-section shown on the drawings. All channels or berms not designated as permanent structures shall be removed prior to final acceptance.

Minimum side slopes for channels and berms shall be two (2) feet horizontal to one (1) foot vertical or flatter. Maximum grade of the ditch bottom shall not exceed two (2) percent unless otherwise designated or directed by the engineer.

The channels shall be seeded and mulched immediately after construction of the ditch or berm is complete. Channels or berms shall be maintained throughout the life of the contract to function as constructed.

204.03.2 - Drainage Excavation:

Drainage excavation shall include construction of terraces, minor channel changes, channels, water bars, diversion channels, and other minor earth drainage structures as shown on the drawings.

204.04 - Temporary Dozer Access Road: The temporary dozer access road shall be built on the flagged grade. Maximum grade shall not exceed 12 percent unless approved in writing by the engineer. The road will have a maximum disturbance width of twenty feet. Upon abandonment, the road will be water barred to direct water to the outside and revegetated.

Water bar locations will be flagged on the ground by the engineer.

204.05 – The method of measurement will be to the nearest 0.1 acre for all work completed and accepted. Horizontal

Payment will be paid at the contract unit price bid per acre and shall be full compensation for furnishing and applying all materials, labor, equipment, and other incidentals necessary to complete the work.

Section 208.0 - Ditches, Terraces, and Channels

208.00 – Rock-lined channels, grass-lined channels, and terraces shall be constructed to carry surface drainage after grade work has been completed. The State will be present and help locate the channels and any terraces. General locations for anticipated channels are shown on the final views of the drawings. Design details for the channels are shown on sheet 12 of the drawings.

There are ten anticipated rock-lined channels required for the project. The rock-lined channels will be 10 feet wide and three (3) feet deep. The channels will be lined with five (5) ounce non-woven filter fabric. The rip-rap will be clean 6”-

12” stone with larger stone over 12” (Class B) mixed in to anchor the rock in place on steep sections of the channel.

Smaller stones will be rejected. The rock-lined channels total 1,690 feet in length. Soil removed from the excavation of the channels shall be deposited where it will not interfere with surface runoff into the watercourse.

Terraces shall be constructed as needed to control drainage. All terraces shall have an outfall grade of no more than two-percent. In no case shall the grade exceed two-percent unless the bottom is on bedrock. The grade of the terrace shall be checked with a level or transit by the Contractor to ensure proper construction. Rock checks shall be constructed to slow the flow of surface water at the discretion of the Project Officer.

There are three grass-lined waterways to be constructed. The waterways will be 10-feet wide. Details for grassed waterways are on sheet 12 of the drawings. The Project Officer may determine that additional drainage control channels

(terraces, grassed waterways, rock-lined channels) are needed after grade work has been completed.

Payment for constructing all terraces, rock-lined channels, rock checks, and grass-lined waterways (those specified in the plans and any additional ones) shall be included in the unit price bid under Section 204.0, Area Grading.

Rip-rap and filter fabric used in constructing the channels shall be paid for under Section 209.0, Rip-rap.

208.01 - This work shall consist of the layout and construction of diversion channels, terraces, and channels necessary to prevent or minimize erosion and control water flow and direction on the project site.

Equipment

208.02 – The equipment size and quantity shall be suited for the size drainage structure shown on the drawings and it shall be available to perform the work. Large equipment shall not be permitted when cutting small diversion channels if an excessive area of disturbance is the result of the use of large equipment.

208.03 - All diversion channels, terraces, and waterway channels shall be constructed to the grades and dimensions shown on the drawings, but in no case shall the bottom grade of any ditch be greater than three (3) percent unless approved in writing by the Engineer.

208.04 - Separate payment will not be made for construction of rock-lined channels, grass-lined waterways, or terraces, but will be a subsidiary item of work under Section 204.0, Area Grading.

Payment for filter fabric and rip-rap used in construction of rock-lined channels will be made under Section 209.0, Rip-Rap.

Section 209.0 - Rip-Rap

209.00 – Ten rock-lined channels shall be constructed at the locations shown on final views of the drawings. The rock-lined channels shall require 1,690 tons of limestone. The limestone will be a combination of 6”-12” limestone and larger

Class-B limestone. Larger Class B limestone will be mixed in to deter the limestone from washing down slope during rain events. The Project Officer will verify the acceptability of the limestone size and the channel location before channel construction can begin.

There are three anoxic limestone drains specified in Section 302.0, Limestone Subsurface Drain Construction.

The ALD’s will require 460 tons of rip-rap. The limestone for the ALD’s will be #2 limestone or 4”-9” limestone. The rip-rap will be high calcium limestone, at least 90% CaCO3.

The approximate lengths and rock requirements of rock channels and ALD’s are as follows:

Site Location Length Quantity

Rock-lined Channel #1 Area 2 270’ 270 tons

Rock-lined Channel #2 Area 3 270’ 270 tons

Rock-lined Channel #3 Area 3 270’ 270 tons

Rock-lined Channel #4 Area 4 310’ 310 tons

Rock-lined Channel #5 Area 4 180’ 180 tons

Rock-lined Channel #6 Area 8 90’ 90 tons

Rock-lined Channel #7 Area 10 90’ 90 tons

Rock-lined Channel #8 Area 18 60’ 60 tons

Rock-lined Channel #9 Area 18 100’ 100 tons

Rock-lined Channel #10 Area 19 50’ 50 tons

TOTAL 1,690 tons

Anoxic Limestone Drain #1 Area 14 280’ 150 tons

Anoxic Limestone Drain #2 Area 15 250’ 130 tons

Anoxic Limestone Drain #3 Area 18 360’ 180 tons

TOTAL 460 tons

A total of 2,150 tons of rip-rap and limestone will be required for the project. A total of 4,300 yd² of five (5) ounce, non-woven filter fabric shall be placed under the rip-rap channels, and around all sides of the subsurface drains.

Payment for stone and filter fabric shall be paid under this Section. Payment for constructing the rock-lined channels, rock checks, and anoxic limestone drains shall be included in the price bid per acre under Section 204.0 (a), Area Grading.

209.01 - This work shall consist of furnishing and placing hard durable limestone rock on the slopes of embankments, dikes, stream banks, on bottom and sides of channels and ditches, gullies, culvert outlets, wing walls, structure outlets and at other locations shown on the drawings.

209.02 - Stones used for rip-rap shall be hard angular limestone rock meeting the following requirements for durability absorption ratio as defined below:

If the Durability Absorption Ratio (DAR) is 23 or greater, the rock is acceptable. If DAR is between 10 and 23, it is acceptable if the Durability Index is 52 or greater. If DAR is less than 10, the rock is unacceptable.

The Durability Index and percent absorption shall be determined by AASHTO T-210 and AASHTO T-85, respectively. The minimum specific gravity of the rock shall be 2.5 as determined by AASHTO T-85. The Contractor shall furnish a certified test report.

Class Allowable Size Range Weight Restriction

A 2 inches to 1.25 feet ≤ 20 percent by weight < 4 inches

B 3 inches to 2.25 feet ≤ 20 percent by weight < 6 inches

C 5 inches to 3 feet ≤ 20 percent by weight < 9 inches

All rock shall be clean shot rock containing no sand, dust, or organic materials. The stone shall be uniformly distributed throughout the size ranges.

209.021 - Nonwoven Filter Fabric: The filter fabric shall be a nonwoven geotextile composed of polypropylene fibers and shall be inert to biological degradation and resist naturally encountered chemicals, alkalis, and acids.

The filter fabric shall as a minimum exhibit the following properties:

Property Test Method Unit Results

Grab Tensile ASTM D 4632 lbf 115

Elongation ASTM D 4632 % 50

Puncture ASTM D 4833 lbf 65

Trapezoid Tear ASTM D 4533 lbf 50

Permittivity ASTM D 4491 sec⁻¹ 1.10-2.00

Flow Rate ASTM D 4491 gal/min/ft² 120-140

AOS ASTM D 4751 US Sieve 70

Mullen Burst ASTM D 3786 psi 175

Delivery, Storage, and Handling: During shipment and storage, the filter fabric shall be wrapped in a heavy-duty protective covering. The storage area shall be such that the fabric is protected from mud, soil, dust, and debris. Fabric that is not installed immediately shall not be stored in direct sunlight.

209.022 - Securing Pins: Securing pins shall be of steel, a minimum of 3/16 inch in diameter and at least

15 inches long. Other equivalent securing devices may be substituted if recommended by the fabric manufacturer.

Rock Rip-Rap Flume

209.03 - This work shall consist of limestone rip-rap for channel protection furnished and constructed in accordance with these…